Training Report Blue Star123.docx

CHAPTER 1 1

INTRODUCTION

1.1 GENERAL Blue Star is India's leading air conditioning and commercial refrigeration company, with an annual revenue of over ₹4400crores (over US$ 681 million), a network of 35 offices, 5 modern manufacturing facilities, 2700 employees, 2200 dealers and 600 retailers. Blue Star's integrated business model of a manufacturer, contractor and after-sales service provider enables it to offer an end-to-end solution to its customers, which has proved to be a significant differentiator in the market place. In fact, every third commercial building in India has a Blue Star product installed. The Company fulfills the cooling requirements of a large number of corporate, commercial as well as residential customers. Blue Star has also recently forayed into the residential water purifiers business with a stylish and differentiated range including India’s first RO+UV Hot & Cold water purifier; as well as the air purifiers and air coolers businesses. The Company also offers expertise in allied contracting activities such as electrical, plumbing, fire-fighting and industrial projects, in order to offer turnkey solutions, apart from execution of specialised industrial projects. Blue Star's other businesses include marketing and maintenance of imported professional electronics and industrial products and systems, which is handled by a wholly owned subsidiary of the Company called Blue Star Engineering & Electronics Ltd. The Company has manufacturing facilities at Dadra, Himachal, Wada and Ahmedabad, which use modern, state-of-the-art manufacturing equipment to ensure that the products have consistent quality and reliability. The Company has a manufacturing footprint of about 1 lakh sq m, producing over 300 models across 25 product lines. The Company's mainstay of product development and R&D has been energy efficiency, coupled with ecofriendly and sustainable products. In accordance with the nature of products and markets, business drivers, and competitive positioning, the lines of business of Blue Star can be segmented as follows: 1.1.1 Electro-Mechanical Projects and Packaged Air Conditioning Systems This business segment covers the design, manufacturing, installation, commissioning and maintenance of central air conditioning plants, packaged/ducted systems and variable refrigerant flow (VRF) systems, as well as contracting services in electrification, plumbing and fire-fighting. After-sales services such as revamp, retrofit and upgrades also form part of this segment. Blue Star is the largest after-sales AC&R service provider in India, maintaining around 2 million TR of equipment. Its 24x7 call centre handles over 1 million service calls a year. Blue Star is present right from understanding the customer requirement to hassle-free project execution and committed after-sales service i.e. throughout the life cycle of the air conditioning system.

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1.1.2 Unitary Products Blue Star offers a wide variety of stylish, contemporary and energy-efficient room air conditioners for both residential as well as commercial applications; manufactures and markets a comprehensive range of commercial refrigeration products and cold chain equipment; water purifiers; air purifiers; and air coolers. 1.1.3 Professional Electronics and Industrial Systems For over six decades, Blue Star has been the exclusive distributor in India for many internationally renowned manufacturers of hi-tech professional electronic equipment and services, as well as industrial products and systems. It has carved out profitable niches for itself in most of the specialised markets it operates in, such as Industrial Products and Systems, Non Destructive Testing, Testing Machines, Data Communication Products & Services, Testing and Measuring Instruments and Healthcare Systems. This business is managed by the Company's wholly owned subsidiary, Blue Star Engineering & Electronics. 1.1.4 DOMESTIC EXPERTISE Blue Star understands the dynamics and intricacies of different Industries and has the expertise to provide optimal solutions for industry specific requirements. We have specialized solutions for Banks, Builders, Cinema / Multiplexes, Dairy, Educational Institutions, Hospitals, Hotels, Industrial Applications, IT / ITES, Malls, Offices, Pharmacy, PSU / Government, Restaurants / Eateries, Showrooms / Retail Outlets, Telecom.

1.1.5 VARIOUS BLUESTAR FACTORIES

i.

THANE Factory Facts: 1st factory of Blue Star established in 1960 situated in Maharashtra near the

commercial capital Mumbai. Area: 7500 sq.mts Manpower: 250 The plant’s processes are all integrated through BAAN ERP. Modern softwares like Pro-E are used for designing products. Also, customized software has been developed for selection of AHU’S and Chillers. All modern manufacturing concepts have been incorporated notable among them being visual management of the factory, Just in Time, Kaizen, 5S, Kanban, TPM, PPM and Pokayoke.

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ii.

WADA

Factory Facts: Started in 2007 Area: 2400sq.mts Manpower: 100 Wada facility is the most recent Plant set by the company, situated around 60 km from Thane, near Mumbai. With a plot size of around 36 acres, this facility is planned to eventually be Blue Star’s biggest manufacturing facility. Modern manufacturing systems are being deployed with the focus on quality system through programmes like Lean Manufacturing, Six Sigma, TPM and Kaizen. The Wada factory has been certified as a Gold-rated Green Building by the Indian Green Building Council, Hyderabad in October 2012. iii.

HIMACHAL This factory has been set-up in the sylvan settings of Kala-amb in Himachal Pradesh. The industrial zone of Baddi has seen a proliferation of manufacturing setups in the recent past, thanks to the benevolent tax concessions granted by the Government. Blue Star too has capitalized on this opportunity to augment its manufacturing capacity.With the addition of Himachal Plant in 2005, which was built with in-house expertise, Blue Star has been able to meet the increasing market demand of room air conditioners. Himachal Plant holds the advantage of augmented scale of operations. With the second factory in Himachal introduced in 2011, the two facilities manufacture room air conditioners as well as storage water coolers, both being signature products enjoying enviable market patronage. The second HP Plant also houses one of the few, state-of-the art MCHX coil (aluminium heat exchanger) manufacturing facilities in the country.

Factory Facts: Started in 2005. This factory is 300kms North West of North Delhi. Area: 14,000sq.mts Manpower: 100

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iv.

DADRA

Factory Facts: Started in 1997 Situated in Dadra and Nagar Haveli, a Union Territory situated 200kms

away

from

Mumbai

and

having

its

capital

at

Silvassa.

Area: 12000sq.mt Manpower: 300 Dadra plant is regarded by industry experts as one of the best manufacturing facilities in the country for air-conditioning products. It's been built in technical collaboration with Rheem USA. v.

BHARUCH

Factory Facts: Blue Star's second factory started in 1980 in Gujarat, which is 400kms north of Mumbai Area: 13500sq.mt Manpower: 320

S. No. Location

Starting year

1

Thane, Maharashtra

1960

2

BHARUCH, Gujarat

1980

3

DADRA, Dadra and Nagar Haveli

1997

4

Kala- Amb, Himachal Pradesh(HP-1)

2005

5

WADA ,Mumbai

2007

6

Kala-Amb, Himachal Pradesh(HP-2)

2011

Table 1.1 Various Plants of BLUESTAR

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1.1.4 LOCATIONS

Fig. 1.1 Location

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1.2 VISION "To deliver world-class customer experience", has been the core philosophy of Blue Star. The Manufacturing division of the Company also aspires to be of world-class caliber.

1.2.1 GUIDING VALUES AND BELIEVWS  To deliver a world class customer experience.  Focus on Profitable Company growth.  Be a company that is a pleasure to do business with.  Work in a boundary less manner between divisions to provide the best solution to customers.  Win our peoples heart and mind.  Place the company’s trust above one’s own.  Encourage innovation, creativity and experimentation in what we do.  Built an extended organization of committed business partners.  Be a good corporate citizen.  Honors all personal and corporate commitments.  Maintain personal integrity.

1.3 HISTORY Blue Star’s foray into manufacturing began with a modest effort at producing ice candy machines in the 1940s, from a small office in Forbes Street in Colaba, Mumbai. It was only in the mid-1960s that Mohan T Advani expanded the Company’s manufacturing base by buying a factory in Thane, at that time a distant suburb in Mumbai. In the late 1990s, with the software boom driving the economy, investments in the manufacturing sector were dwindling. However Blue Star’s management was convinced about the vitality of manufacturing to drive growth in the value chain and for being successful in the longer run. A new and exciting chapter began with the inauguration of a world-class factory at Dadra in 1997. This unit was equipped with state-of-the-art technologies adhering to high quality standards and manufacturing processes and was set up in consultation with Rheem, USA. After the success of the Dadra factory, Blue Star was successfully able to replicate this manufacturing philosophy and attitude in its later factories, namely at Himachal Pradesh (HP), Wada and Ahmedabad.

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The two fundamental transformations of Blue Star’s manufacturing capabilities took place with the improvement of operational efficiencies and quality, resulting in competitiveness in terms of price and delivery. Blue Star's seven modern manufacturing facilities coupled with an able product development team, the country's most advanced AHRI-certified chiller test lab, significant support from original equipment manufacturers and a good footing in the export market has given Blue Star a cutting edge in manufacturing. The Company remained competitive in the market while prices of air conditioning products fell constantly in the late 1990s. The introduction of world-class manufacturing facilities coupled with IT, automation and an overall positive morale amongst the employees resulted in reduction of manufacturing costs. With the addition of the first HP plant in 2005, which was built with in-house expertise, Blue Star was able to meet the increasing market demand of room air conditioners. This plant has the advantage of an augmented scale of operations. Thereafter, the Company’s largest manufacturing unit was established in 2008 at Wada, which manufactures a range of screw chillers in air cooled, water cooled and flooded types, with all products being AHRIcertified, along with innovative water cooled centrifugal chillers and refrigeration units for cold rooms. It is also a contract manufacturer of sophisticated condensing units and roof top units for a few multinationals. The Wada facility added new technology products such as Turbocor chillers and screw chillers with falling film technology, which were initially developed in the erstwhile Thane factory. The second HP factory was inaugurated in 2011. The two HP facilities together manufacture room ACs as well as storage water coolers, both being signature products that enjoy enviable market patronage. The second HP plant also houses one of the few, state-ofthe-art MCHX coil (Aluminium heat exchanger) manufacturing capabilities in the country. The Company then expanded its manufacturing capacity for refrigeration products by setting up another plant in Ahmedabad in 2012, driven by the growth in the ice cream, frozen foods and dairy segments. This has made the current production capacity for these products quite robust. Today, Blue Star manufactures the country’s widest range of air conditioning and refrigeration products from its five ISO 9001-2008 certified plants. The Company is also planning for two more production facilities, one each at Samba in Jammu as well as Sri City in Andhra Pradesh. Blue Star’s manufacturing facilities have set very high standards for AC&R plants in India. Apart from ensuring manufacturing excellence and maintaining a ‘customer first’ philosophy in all its planning and execution, the plants also undergo constant upgradation and redesigning to keep pace with the changing technology and global practices, thus keeping them always a step ahead of the industry. Every plant is also constantly evolving its practices to continue to be environmentally responsible and ecologically sustainable.

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1.4 OBJECTIVES OF INDUSTRIAL TRAINING 

Experience the discipline of working in a professional engineering organization.



Develop understanding of the functioning and organization of a business.



To study the various process which are done on various parts of air conditioning system.



Interact with other professional and non-professional groups.



Apply engineering methods such as design and problem solving.



Develop technical, interpersonal and communication skills, both oral and written.

1.5 DEPARTMENTS OF BLUESTAR LIMITED 

Production planning and control



Quality engineering



Industrial engineering



Personnel department



Accounts department



Purchase department



Coil shop



Assembly shop



Research and development department



Maintenance

1.5.1 DETAILS OF THESE DEPARTMENTS

1) PRODUCTION PLANNING AND CONTROL(PPC) The PPC at Blue star is in charge of maintaining the inventory status, of arranging receipt and dispatch of components and of follow up. It also supervises transfer of components from the machine shop and stores to the assembly area and maintains the shop floor status of the components. PPC indicates two functions: Production planning is the function concerned with the planning, directing and controlling of the methods to be used to make products and the way in which the production facilities etc. should be laid out in the space available for production.

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Production control is the function of the management, which plans, directs, and controls the material supply and processing activities of an enterprise. So that specified products are produced by specific method to meet and approved sales program.

2) QUALITY ENGINEERING DEPARTMENT Another important part of the plant is the Quality Shop. With the increasing competition in the market it is desired by the company to produce such a quality product so as to satisfy the various needs of the customer and the level of the quality of the product. This work is done by the quality department. Quality seeks on every minute defects and smallest of dimension and that could bring much risk of poor quality, defects and line reject. Quality is explained with reference to the product. Quality can be defined as fitness for purpose.

The quality engineering department at Blue star is divided into four sections: 

Quality Engineering (Receipt)



Quality Engineering (Machine Shop)



Quality Engineering (Assembly Shop)



Quality Engineering (Testing)

3) INDUSTRIAL ENGINEERING DEPARTMENT Industrial Engineering (I.E.) is concerned with the design, improvement and installation of integrated system of people, materials, equipment and energy. It draws upon specialized knowledge and skill in the mathematical, physical and social sciences together with principles and methods of engineering analysis and design to specify predict and evaluate the results to be obtained from such system. I.E. is the engineering approach to detailed analysis of the use and cost of resources of an organization. The main resources are men, money, material, equipment and machinery. The industrial engineers carry out such analysis in order to achieve the objectives (to increase productivity or profits etc.) and policies of the organization.

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Industrial engineers are concerned with two basic objectives: improving efficiency and reducing wastage. Efficiency is improved on resources employed such as men, material, machine management and money. It therefore means improving efficiency in manufacturing process, methods, capital investment and efficiency of plant. The second objective of I.E. is to reduce wastage. Since the two objectives are of universal application.

4) PERSONNEL Any industry depends on human beings. It has to acquire workers and it creates an acceptable and rule of practice to encourage the greatest degree of participation from its employees. The department concerned with this is called personnel department. The personnel function exists in every enterprise regardless of its size & irrespective of the fact whether or not there is personnel department. In small concern, the owner itself carries on the personnel function whereas a large organization it is given a maximum individual development, desirable working condition and desirable working relationship between employees and employers and between groups of employees and effective moldings of human resources for the purpose of contributing to the organizational goals.

5) ACCOUNTS The main objective of the accounts department is to determine, classify and analyze the cost and income of the business enterprise. Accounts department provides information for the following: 

Cost control through accumulation and utilization of cost data



Profitability of products



Budgeting and Standard costing



Continuation of business



Proper Matching of cost with revenues



Control of material and supplies



Wages and Overhead costs



Determining expansion and contraction policies

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6) PURCHASE The purchase department is responsible for purchasing all types of material in correct qualities and the most economical prices. The purchase department occupies a vital and unique position in a concern because purchasing is one of the main functions in the success of a modern manufacturing concern. The purchasing function acts like as a liaison agency, which operates between the factory and the outside vendors on all matters of procurement delivery of the articles in accordance with terms of purchase agreement.

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CHAPTER 2

2

WORK PLAN

S.NO. WEEK/TIME DURATION 1.

WORK DESCRIPTION

1st Week

Introduction to basic terms used in Industry such as

01.06.2017 to 07.06.2017

Total Productive Maintenance (TPM Pillars), 5S and various departments.

2.

3.

4.

5.

6.

2nd Week

Introduction to the products manufactured and

08.06.2017 to 14.06.2017

various machine used.

3rd Week

Introduction of the coil Shop and to understand

15.06.2017 to 21.06.2017

operation of various machines.

4th Week

Introduction of the Assembly Shop and assembling

22.06.2017 to 28.06.2017

process of various products.

5th Week

To observe component used in ODU, IDU and

29.06.2017 to 05.07.2017

various operations performed by them.

6th Week

To observe the various steps for assembling the

06.07.2017 to 12.07.2017

outdoor unit and various tests perform before packaging on the assembly line.

7.

7th Week

Report Making and Viva-Voice.

13.07.2017 to 16.07.2017

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CHAPTER 3 3

EXECUTION OF WORK PLAN

3.1 TOTAL PRODUCTIVE MAINTENANCE 3.1.1 INTRODUCTION (TPM) TPM is a new way of looking at maintenance, or conversely, a reversion to old ways but on a mass scale. In TPM the machine operator performs much, and sometime all, routine maintenance tasks themselves. The auto maintenance ensures appropriate and effective efforts are expended since the machine is wholly the domain of one person or team. TPM is critical adjunct to lean manufacturing. One way to think of TPM is "Deterioration Prevention " & " Maintenance Reduction ", not fixing machines.

Total Productive Maintenance (TPM) resembles Total Quality Management (TQM) in several aspects, such as 

Total commitment to the program by Upper level management is required.



Employees must be empowered to initiate corrective action.



A long range outlook must be accepted as TPM may take a year or more to implement and is an on-going process.

3.1.2 OBJECTIVE OF TPM "Continuously improve all operational conditions, with in a production system; by stimulating the daily awareness of all employees". After TPM, the focus was stretched, and also supplier and customer were involved, this next methodology was called as Lean Manufacturing. An accurate and Practical Implementation of TPM will increase Productivity within the total organization.

3.1.3 IMPLEMENTATION OF TPM TPM has SIX Goals: 1. Zero Breakdown 2. Zero Defect

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3. Zero Losses 4. Zero Accidents 5. Zero Pollution 6. Zero Health Hazards

TPM identifies the 6 losses and then works systematically to eliminate them by making improvements (Kaizen).

TPM has 8 Pillars of activity, each being set to achieve a "Zero" target. These 8 Pillars are the following: 1. Focused Improvement 2. Autonomous Maintenance 3. Planned Maintenance 4. Training & Education 5. Early Phase Management 6. Quality Maintenance 7. Office TPM 8. Safety, Health & Environment

To begin applying TPM concepts to plant maintenance activities, the entire work force must first be convinced that Upper level management is committed to the program. The first step in this effort is to either hire or appoint a TPM coordinator. It is responsibility of the coordinator to sell the TPM concepts to the work force through an educational program. To do a thorough job of educating and convincing the work force that TPM is just not another "Program of the month, 'will take time, perhaps a year or more. 3.1.4 WHY TPM? TPM was introduced to achieve the following objectives.  Avoid wastage in a quickly changing economic environment.  Producing goods without reducing product quality.  Reduce Cost.  Produce a low batch quantity at the earliest possible time.

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Fig. 3.1 Pillars of TPM

3.1.5 Tool Management The objectives of Tool Management Pillar: 

Tool cost reduction



Tool inventory reduction



Tool waiting time reduction and prevention of losses due to tool unavailability



Proper tool life monitoring



Prevention of losses related to tool usage due to poor knowledge of operators.

3.1.6 Activities of Tool Management Pillar: 

Data collection and analysis of losses related to tools, jigs and fixtures.



Education and Training of operators regarding tool life, selection of parameters such as feed and rpm, and usage of delicate tooling. 0

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3.2 5S Policy TPM starts with 5S. Problems cannot be clearly seen when the work place is unorganized. Cleaning and organizing the workplace helps the team to uncover problems. Making Problem visible is the first step of Improvement.

1.

SEIRI - Sort out : This means sorting and organizing the items as critical, important, frequently used items, useless or items that are not need as of now. Unwanted items can be salvaged. Critical items should be kept for use nearby and items that are not be used in near future, should be stored in some place. For this step, the worth of the items should be decided based on utility and not cost. As a result of this step, the search time is reduced.

2.

SEITON - Organize : The concept here is that "Each item has a place and only one place". The items should be placed back after usage at the same place. To identify items easily, name plates and colored Tags has to be used. Vertical racks can be used for this purpose, and heavy items occupy the bottom position in the racks.

3.

SEISO - Shine the work place : This involves cleaning the work place free of burrs, grease, oil, waste, scrap etc. No loosely hanging wires or oil leakage from machines.

4.

SEIKETSU - Standardization : Employees have to discuss together and decide on standards for keeping the work place/ Machines / pathways neat & clean. These standards are implemented for all organization and are tested / inspected randomly.

5.

SHITSUKE - Self-discipline : Considering 5S as a way of life and bring about self-discipline among the employees of the organization. This includes wearing badges, following work procedures, punctuality, dedication to the organization etc.

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3.3 KOBETSU KAIZEN "Kai" means change, and "Zen" means good (for the better). Basically Kaizen is for small improvements, but carried on a continual basis and involve all people in the organization. Kaizen is opposite to big spectacular innovations. Kaizen requires no or little investment. The principle behind is that "a very large number of small improvements are more effective in an organizational environment than a few improvements of large value. The pillar is aiming at reducing losses in the workplace that affect our efficiencies. KAIZEN POLICY 

Practicing concepts of zero losses in every sphere of activity.



Relentless pursuit to achieve cost reduction targets in all resources.



Relentless pursuit to improve all plant equipment effectiveness.



Extensive use of TPM analysis as a tool for eliminating losses.



Focus on easy handling of operators.

Tools used in Kaizen: 

PM Analysis



Why-Why Analysis



Summary of Losses



OEE Calculation



Kaizen Register



Kaizen Summary Sheet

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Fig. 3.2 KAIZEN POLICY 3.4 BASIC REFRIGERATION Refrigeration is the science of producing and maintaining temperature (in a product or space) which is lower than that of the surroundings or it is a process in which heat is taken from a place where it is not desirable & reject to a place where it is not objectionable. In order to remove heat from a body and to reject it to the surroundings it is necessary to have a working medium, which is known as a Refrigerant. The unit used for refrigeration is Ton and is defined as the heat of fusion absorbed by melting 1 short ton of pure at 32o F in 24 hours. 3.4.1 Why air conditioning required:Air conditioner delivers important comfort during the cooling season, helping to keep your home temperature and humidity levels comfortable. If the prospect of living without your AC is more than you can handle, it’s a good idea to maintain your air conditioner regularly to make sure it keeps humming along. 3.4.2 Simple process:The REFRIGERATION CYCLE comprises of 1. Absorption of heat by evaporation of liquid refrigerant at controlled low pressure. 2. Raising the pressure of low pressure refrigerant vapours by use of compressor. 3. Removal of heat from the high pressure vapours in the condenser so as to liquefy the vapours. 4. By use of throttling device, reducing the pressure of high pressure liquid to the required pressure in the evaporator A fan draws air from the room first through a cooling device, consisting of metal fins extending from a pipe through which cooling fluid circulates, at a rate determined by the thermostat or by the humidistat. The air next passes over a heater, usually electrical, which is energized on instructions from the room thermostat. Minimal Air-conditioning. The part of the system in the room, on the left, pulls air first over a cool surface and then over a warming surface. The part of the system on the right circulates the cooling fluid. The fluid passes from the reservoir through a valve B into the lower pressure within the cooling unit in

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the room. There the liquid boils, removing heat from the air. The boiling point is fixed by the constant pressure set by valve A. The vapours is then compressed and condensed back into a liquid which collects in the reservoir ready for another cycle.

Fig. 3.3 Air Conditioning Cycle

1. COMPRESSOR A refrigeration compressor is the heart of a vapor compression system. It raises the pressure of refrigerant so that it can be condensed into liquid, throttled, and evaporated into vapours to produce the refrigeration effect. It also provides the motive force to circulate the refrigerant through condenser, expansion valve, and evaporator. According to the compression process, refrigeration compressors can be divided into positive displacement and non positive displacement compressors. A positive displacement compressor increases the pressure of the refrigerant by reducing the internal volume of the compression chamber. Reciprocating, scroll, rotary, and screw compressors are all positive displacement compressors. The centrifugal compressors the only type of non positive displacement refrigeration compressor widely used in refrigeration systems today. Like the heart which pumps the blood through the body, the compressor circulates the refrigerant through the system. Hence it is called the heart of the refrigeration system.

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The basic purpose of the compressor is: i)

Reclaim the refrigerant the evaporator.

ii)

To circulate the refrigerant through the system.

iii)

To create the pressure difference between high side and low side. For reclaiming the refrigerant vapours leaving the evaporator if must be

compressed to a pressure corresponding to the saturation temperature which will be higher than the temperature of the naturally available air or water. This is the main function of the compressor. The compressor also continuously circulates the refrigerant through the system. Its capacity determines the capacity of the refrigeration system as whole. 3.2.1 Classification of Compressors:

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COMPRESSORS

RECIPROC-ATING

ROTARY

SINGLE ACTING VANE OR

ROLLING PISTON

WANKEL ROTARY

SCROLL

SCREW

CENTRIFUGAL

DOUBLE ACTING

SINGE STAGE

TWO STAGE

FIXED VANE

MONO

ROTATING VANE

DUAL

Fig 3.4 Classification of Compressor 2. CONDENSER AND COOLING TOWER The function of the condenser is to desuperheat the high pressure gas, condense it and also sub-cool the liquid. Heat from the hot refrigerant gas is rejected in the condenser to the condensing medium – air or water. Air and water are chosen because they are naturally available. Their normal temperature range is satisfactory for condensing refrigerants. Like the evaporator, the Condenser is also heat-exchange equipment.

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TYPES OF CONDENSERS There are three types of condensers, viz. (1) air-cooled, (2) water-cooled and (3) evaporative. As their names imply, air-cooled condensers use air as the cooling medium, water-cooled condensers use water as the medium and the evaporative condenser is a combination of the above, i.e. uses both water and air. 3. COOLING TOWER Cooling towers are essentially water conservation or recovery device. Warm water from the condenser is pumped over the top of the cooling tower from where it is sprayed down to the tower basin. The temperature of water is reduced as it gives up heat to the air circulating through the tower. Cooing tower is divided into two broad classes: 1. Natural draft or atmospheric tower. 2. The Mechanical draft towers through which air is draw by fans.

4. EXPANSION VALVE In the hand-expansion valve there is an orifice which gives resistance to the liquid flow and produces the necessary pressure drop. As the name indicates this is a manually-operated needle valve (Fig.8.1). This is very simple device. Its operation is not automatic and therefore, the valve has to be manually adjusted every time the load changes. This is an operator to look after the plant continuously. Because of this handicap, the hand-expansion valve is seldom used nowadays.

5. CAPILLARY TUBES: Instead of an orifice, a length of a small diameter tube can offer the same restrictive effect. Small diameter tubing is called capillary tube, meaning ‘hair-like’. The inside diameter of the capillary used in refrigeration is generally about 0.5 to 2.28 mm (0.020 TO 0.090”). The longer the capillary tube and/or the smaller the inside diameter of the tube, greater is the pressure drop it can create in the refrigerant flow, or in other words, greater will be the pressure different needed between the high side and low side to establish a given flow rate of the refrigerant.

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The length of the capillary tube of a particular diameter required for an application is first roughly determined by empirical calculation. It is then further correctly established by experiments. The capillary tube is not self-adjusting. If the conditions change, such as an increase in the discharge/condenser pressure due to a rise in the ambient temperature, reduction in evaporator pressure etc. the refrigerant flow-rate will also change. Therefore, a capillary tube, selected for a particular set of conditions and load will operate somewhat less efficiently at other conditions. However, of properly selected, the capillary tube can work satisfactorily over a reasonable range of conditions.

6. EVAPORATOR The process of heat removal from the substance to be cooled or refrigerated is done in the evaporator. The liquid refrigerant is vaporized inside the evaporator (coil or shell) in order to remove heat from a fluid such as air, water or brine. The fluid to be cooled can be made to pass over the evaporator surface inside which the “refrigerant is boiling; such a system is called the ‘direct expansions system. In certain cases, such ass in big air conditioning systems or in industrial processing, water or brine is chilled in the evaporator. The chilled fluid is circulated through cropper or steel coils over which the air or substance to be cooled is passed. Such a system is called the indirect system. The coil (copper or steel) generally called cooling coils act as heat exchangers.

Evaporators are manufactured in different shapes, types and designs to suit a diverse nature of cooling requirements. Thus, we have a variety of types of evaporators, such as the prime surface type, finned tube or extended surface type, shell and the tube liquid chillers, etc. Evaporators are classified into two general categories the ‘dryexpansion’ evaporator and ‘flooded’ evaporator.

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3.5 BASIC AIRCONDITIONING 3.5.1 SPLIT AIR CONDITIONER: Split type air conditioner also known as remote mounted air conditioner is basically an air conditioning system built in two distinct units ; 

Indoor unit



Outdoor unit

The indoor unit comprising of a fan coil is located in the space to be conditioned whereas the outdoor unit consisting of compressor and fan coil is installed outdoors. The two units are connected by refrigerant piping i.e.; liquid and suction lines. CONSTRUCTION: 1. Indoor unit: The indoor unit is a single casing , well insulated on the inside , housing the evaporator coil, twin blower system within fan motor for air handling, capillary tubes for refrigerant expansion , electric controls and a condensate drain provision. The condensate drain piping is installing careful to avoid spilling of condensate into the room. The unit is style to blend with the interior décor of the conditioned space. The unit may be floor mounted as per requirement. 2. Outdoor unit: This is also a single casing, housing the compressor, condenser coil propeller fan with motor, suction line accumulator and in some cases a liquid receiver. The outdoor unit is connected to the indoor unit by extended suction and liquid piping. The units may be either factory charged or charged at the site after installation the factory charged units are provided with necessary couplers /service valves on the liquid and suction line whereas in the case of charging at the site the entire refrigerant circuit is completed by brazing the tubes. Once the system is leak tested and evacuated, charging is carried out in the installed condition.

ADVANTAGES: Advantages of split system over window air conditioner; 

Noise free operation of indoor unit due to remote location of condensing unit.



No wall opening necessary



Blends with room decoder

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

Better air circulation inside, due to flexibility of proper location



Feasibility of multiple evaporators in different rooms using single condensing unit.

DISADVANTAGES: In spite of the above advantages, the demerits of split system are: 

Loss in capacity by 5-10 % due to pressure drop in extended suction line.



Loss of refrigerant charge due to leakage from service valves/ flare connections etc.



Possibility of oil not returning back to compressor due to poor designed extended long. Which ultimately results in lubrication failure of compressor?



Possibility of condensate spilling into room due to poor installation

On the whole, a split system offers outstanding user conveniences if the demerits listed above are taken care of by adhering to good design/ installation practices which are covered in the chapter. 3.5.2 DESIGN ASPECTS – SPLIT SYSTEM: The component design for a split system essentially remains the same as that of window air conditioner but the emphasis is to be on a few critical design parameters which are as follow; a) Condenser airflow : In window air conditioners the heat rejection by condenser to air is supplemented by the condensate (from evaporator) splashing on to the condenser surface. Since it is not the case in split system, air flow requirement, condenser, fan and motor selection should be based on this consideration. b) Capillary selection : Capillary selection and refrigerant charge are critical for any system and is especially so in a split system because under low ambient conditions suction line tends to frosts due to pressure drop and improper capillary and refrigerant charge will further aid this frosting. This combination should be chosen such that apart from satisfactory operation of the system under normal and adverse ambient conditions, under low ambient conditions there should not be any frost formation on suction line.

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Normally capillary tube is located in the indoor unit but there are instances where capillary tube is located in the condensing unit, for eliminating liquid expansion noise in the indoor unit. In such cases it is essential that the entire liquid piping between two units also be well insulated. c) Refrigerant piping : The design considerations which govern refrigerant sizing are as follow: 

Refrigerant mass flow - adequate refrigerant supply to evaporator under all operating conditions.



Oil return – positive and continuous return of oil to compressor under all operating conditions.



Flexibility – avoid rigid piping as it causes noise transmission.



Pressure drop – excessive refrigerant pressure drop which reduced system efficiency and capacity to be avoided.



Liquid return – prevention of liquid refrigerant from entering the compressor during off cycle and start up.



Oil accumulation – avoiding oil entrapment in evaporator or suction line which when returns suddenly to compressor in form of large slug causes compressor valve damage.

3.5.3 Suction line sizing: The suction line sizing is the most critical then other refrigerant lines. Under sizing of suction line causes an excessive refrigerant pressure drop in suction line and results in system capacity loss and efficiency. Over sizing of suction line, lowers the pressure drop but results in refrigerant velocities which may be too low to permit adequate oil return from evaporator to compressor. Therefore optimum size for suction piping is one which provides minimum practical refrigerant pressure drop maintaining sufficient vapour velocity which ensures adequate oil return under all operating conditions. Maximum pressure drop in suction line is .2 kg/cm2 (3psig) for refrigerant R-22 which is equal to 1.1oC (2oF) change in saturation temperature.

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3.5.4 Liquid line: The function of liquid line is to deliver sub cooled refrigerant to the capillary tube at sufficiently high pressure. As the refrigerant is in the liquid state and at a high pressure, oil entering the liquid line is readily carried along by refrigerant to the evaporator and oil return does not pose any problem. Moreover the density of liquid refrigerant (R-22) and oil are close enough which also facilitates oil return. Liquid refrigerant (R-22) in a vertical column, due to its weigh exerts a pressure of 0.12 to 0.14 kg/cm2 per meter length (.5 to .6 psig for every linen foot )of tube. Depending whether the flow is upward or downward the pressure is to be subtracted or added. In addition pressure drop due to friction is also to be considered in general liquid line to be done. Keeping in view the sub cooling requirement, and also for holding minimum refrigerant charge possible. Normally, during split installation three type of situation are encountered, viz; 1. Evaporator located above the compressor

2. Evaporator located below the compressor

3. Evaporator and compressor at the same level

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3.6 REFRIGERANT A refrigerant is a medium of heat transfer through phase change such as evaporation at low temperature and pressure, of course with some exception where the sensible energy transfer occurs. So a refrigerant may be defined as the substance that absorbs heat either by expansion on vaporization and reject t through condensation in condenser.

Classification of refrigerant:

1.

Based on working principle.

2.

Based on chemical compound.

3.

Based on safety

S.No.

Refrigerant

Application

1

R-12

Domestic refrigerant,freezer

2

R-12, R-22, R-502

Small retail supermarkets

3

R-11, R-12, R-144

Air-Conditioning

R-502 4

R-22, ammonia

Industrial

5

CO2

Automobile

6

Propane

Refrigerator

Table 3.1 Different types of refrigerant and their application

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3.7 MANUFACTURING PHILOSOPHY Manufacturing philosophy in Blue Star starts with the birth of an idea, a need in the market, which is harnessed using manufacturing setup. All Blue Star factories are well equipped to deliver a required product to the customer on time. In its continuous thrust towards new product development, introducing product innovations and enhancing product quality and customer satisfaction, Blue Star has upgraded and expanded its manufacturing and product development facilities. 3.7.1 MANUFACTURING SYSTEM The factories make extensive use of IT to enhance productivity and product development capabilities. All our factories are ISO 9001:2008 certified. BAAN ERP implemented in 3 factories and Himachal plant under implementation. 3.7.2 MANUFACTURING EQUIPMENT 1) Sheet Metal Fabrication. 2) Heat Exchangers. 3) System Tubing. 4) Brazing. 5) PUF Insulation. 6) Assembly and Testing.

1

SHEET METAL FABRICATION A high degree of repetitive accuracy in sheet metal fabrication is achieved by using specialized equipment, CNC metal forming machines. The raw material used is prime quality, corrosion-resistant, galvanized steel for enhanced life of the product. The equipment used for processing the steel includes CNC machines such as an Amada turret punch press, a LVD / Amada hydraulic press-break. All these allow for high quality cabinet fabrication within tight tolerances.

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Fig 3.5 Sheet Metal Fabrication 2

HEAT EXCHANGERS Experienced engineers create heat exchanger designs using high precision design software, which are then validated in our test labs. We also make sure that our designs are energy efficient for optimum heat transfer. Fin and Tube: Our sophisticated coil shops have some of the most advanced machines from USA, Japan and Korea. The Burr Oak coil line produces energy efficient DX heat exchangers. These have plain or enhanced split fins with grooved copper tubes for maximum heat transfer efficiency. We source plain and inner grooved copper tubes with coated aluminum fin stock of international quality from leading manufacturers to fit our specifications.

Fig. 3.6 Fin press

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1. Shell and Tube: We have shell and tube exchangers using specially enhanced surface copper tubes and shell design as per Blue Star or TEMA standards. We use Heat Transfer Research Inc. (HTRI design software for these heat exchangers) Plate Type: Blue Star products also incorporate stainless steel plate heat exchangers for specialized process applications.

2. SYSTEM TUBING 3-axis CNC copper tube-bending machines from Japan fabricate wrinkle-free system tubing to exact dimensions for a perfect stress-free fit. Special purpose machines carry out operations like end closing, flaring and forming for good joint formation. Prime quality copper tubes sourced globally help in optimum product performance.

Fig 3.7 3-axis CNC copper tube bending machine 3. BRAZING The brazing process is carried out in an inert atmosphere to avoid oxidation and the resultant impurities from contaminating the refrigerant system. Specially selected brazing equipment and fixtures are used to produce high quality brazing. The joints are pressure-tested to check weld strength and leakage. The coils are then tested for fine leaks with ultra-sensitive electronic leak detectors. An automated coil brazing line from Korea ensures consistent quality brazing and leak proof joints.

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Fig. 3.8 Brazing Process 4. PUF INSULATION We fabricate CFC-free PUF insulated panels by using the latest equipment from Cannon. This enables us to achieve a uniform and constant density of insulation for air handling units, telecom shelters and cold storage panels. We supply panels of up to 6 meters in length and 25mm to 125 mm in PUF thickness. Our PUF insulation expertise finds use in a wide range of applications such as Air Handling Units, water coolers, deep freezers, reach-in coolers and mortuary chambers.

5. ASSEMBLY AND TESTING The final product is assembled sequentially on conveyors, with in-built quality checks during assembly operations. Pneumatic tools permit torque-controlled rigidity, and specially coated corrosion-resistant hardware provides firm locking. Each machine is then electronically tested for leaks and run-tested for performance and electrical safety parameters before packaging.

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3.8 ASSEMBLY SHOP

3.8.1 Assembly Line (O.D.U.) All part assembly of ODU take place here through following processes :1. Base assembly 2. Compressor loading 3. Valve fixing 4. Coil mounting 5. System Tubing 6. Brazing 7. Fan motor mounting 8. Front panel installation 9. Vacuumization 10. Gas charging 11. Wiring installation 12. Earth testing 13. Run testing 14. Packing

3.8.2 Assembly Line (I.D.U.) 1. Kit Loading 2. Swing motor mounting 3. Motor and Blower fixing 4. Coil Fixing 5. Gas Charging

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6. Control Box Assembly 7. H.L.D. and RPM Test 8. Safety Test 

Ground Test



Insulation Test



Leakage Current Test



High Voltage Test

9. Frame Fitting 10. Performance Testing 3.8.3 CONVEYOR LINE – 1 & 2 MAJOR FEATURES:•

Length -: 80 meters.

•

Adjustable Speed Range : 0 ~ 10 m/min

•

Auto pallet Loading & Unloading system .

•

On-line Evacuation System.

•

On-line Low Voltage Start ability.

•

On-line Run test.

•

On-line testing of Window AC & Split AC with IDU Coupling

•

Automatic Changeover of Supply Voltage from 187 to 230 Volts.

•

Automatic On-line packing.

•

Bar Code integration for absolute data capturing & mistake proof dispatch tracking.

•

Suitable for WAC, ODU’s.

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Fig.3.9 Assembly Line CONVEYOR LINE – 3: MAJOR FEATURES:•

Length -: 50 meters.

•

Multiple Product Conveyors.

•

Programmable speed.

•

Can go for Cyclic as well as Continuous mode.

•

Powder paint Slat conveyor ensures long life of Conveyor.

•

Bar Coding Integration.

•

Suitable for Multi/Mega SAC, FCUs & Water.

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3.9 COIL SHOP 1. FIN PRESS Overview of Machinery The purpose of this fin line is to produce precision metal fins to be used in heat transfer for heating and air conditioning applications. Three basic processes are involved in the fin line operation: uncoiling the material to feed into the line, stamping and cutting the material into the required pattern using a progressive die, and stacking the completed material in preparation for the next operation.

Power Requirements Electrical Requirements 380- 415 V, 50 Hz SPECIFICATIONS: Press capacity:-80T  FPI range:12-20  7mm die with 2 progression and 42row.  Material thickness:-0.100mm-0.12mm.  Output 600 coils/shift. MAJOR FEATURES: Used for punching fins of heat exchanger.  Automated PLC controlled  Facilities for both 7mm & 9.52 mm coils  User friendly touch screen.  Two uncoiler eliminates stoppage due to roll changeover.  Top down mechanism for smooth dropping for 1 row fins.  Stack lifting mechanism reduces machine stoppage due to rod vibration.  Helps easy removal of fins.  Automatic changeover of die profile from plan to slit.

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Fig 3.10 Fin Press Pneumatic Requirements:The air supply pressure should be in the range of 80-125 PSI.

Types:1. Fin press 7mm 2. Fin press 3/8 mm

Fin Stock Uncoiler The fin stock uncoiled is located at the back of the fin press. Its purpose is to supply a loop of fin stock to the press. Sensors built into the uncoiled detect the status of the stock and will stop the press when the fin stock loop becomes too tight or the fin stock supply is exhausted.

Fin Die The die creates the desired fin shape progressively, building each fin feature over several forming stations. As the fin stock progresses through the die, it is sheared lengthwise to form individual fin rows. The press provides the necessary force to form the stock into fins, while the feed linkage allows the action of the press to pull the fin stock through the die.

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Fig 3.11 Fin Stock Uncoiler

Fig. 3.12 Fin Die

Stacker As the formed fin strips progress out of the die, they are cut off into individual fins and dropped on the stacker rods where they are neatly aligned onto stacks of a defined number of fins. When the required number of fins have been produced, the press stops automatically, and the stacker forwards the fins to the lacing machine or to a position to be unloaded. When the stacker mechanism returns to its stacking position, the press resumes regular operation.

Fig 3.13 Stacker

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2. HAIR PIN BENDER SPECIFICATIONS: ➢ 7 row (7mm X 4 &9.52mm X 3) ➢ Feed:-13m/min ➢ Hair pin length:-1500mm~2800mm. ➢ Output:-500 coils/shift. ➢ Connected Load:-20.25HP.

Fig.3.14 Hair Pin Bender

MAJOR FEATURES:➢ Used for making hair pin bends (for heat exchanger). ➢ “Eye to Sky” feeding elements to loading and unloading time. ➢ Facility to make both 7mm a 9.52mm coils. ➢ PLC controlled operations. ➢ Photo guard ensures safety.

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3. VERTICAL MECHANICAL EXPANDER Its work is to ensure accuracy and precision during tube entry and exit ensure that tubes are expanded uniformly, and fins remain unharmed. Higher production rates are made possible by the short cycle time. The coil lifts and ejects systems assist in operator safety and ergonomics. SPECIFICATIONS:➢ Capacity to expand 36 holes X 4row X 1500mm. ➢ Output= 800 coils/ shift.

MAJOR FEATURES:➢ Used for bending copper hair pin to aluminum fins. ➢ Suitable for 9.52mm coil.. ➢ Easy loading and unloading of coil.

Fig. 3.15 Vertical Expander

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4. AUTOMATIC COIL TESTING TANK SPECIFICATIONS:➢ Coil length 100- 1200mm. ➢ No. of rows= 4max ➢ Output=800 coils/shift

MAJOR FEATURES:➢ Testing coil at 400 PSI air pressure. ➢ Facility to checking two coils at a time. ➢ PLC controlled operations. ➢ Reduces fatigue. ➢ Reduces cycle time. ➢ Automatic injection and release of high pressure ensures safety.

Fig. 3.16 Automatic Coil Testing Tank

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7. TUBE BENDING MACHINE SPECIFICATIONS: Range:-5/16”to 5/8” die tube bending.  Length:-1725mm (Max)  Output:-850 tubing/shift MAJOR FEATURES:➢ Can bend two radius at a time in same setup. ➢ Easily programmable ➢ Can store data in a floppy. ➢ Use friendly touch screen. ➢ Easy loading and unloading of copper tube. ➢ Reduce cycle time.

Fig. 3.17 Tube Bending Machine

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8. Coil Drying Oven Specifications:     

Coil Length: - 300-1500mm. Coil Width: - 12.7-84mm. Conveyor Length: - 10meter. Temperature: - 180degree (max). Speed: - .75-3m/min.

Main Features:       

Used for drying coils after leak testing. Environment friendly due to electric heating. Adjustable coil guides, resulting reduction in model changeover time. Production Capacity: - 800coils/shift. Automatic temperature control. Air flushing reduces the power consumption. Adjustable doors to reduce heat losses.

Fig. 3.18 Coil Drying Oven

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CHAPTER 4 CONCLUSION

As an undergraduate of the Jawaharlal Nehru Government Engineering College Sundernagar I would like to say that this training program is an excellent opportunity for me to get to the ground level and experience the things that we would have never gained through going straight into a job. I am grateful to the Jawaharlal Nehru Government Engineering College Sundernagar and Blue Star Limited for giving me this wonderful opportunity. The main objective of the industrial training is to provide an opportunity to undergraduates to identify, observe and practice how engineering is applicable in the real industry. It is not only to get experience on technical practices but also to observe management practices and to interact with fellow workers. It is easy to work with sophisticated machines, but not with people. The only chance that an undergraduate has to have this experience is the industrial training period. I feel I got the maximum out of that experience. Also I learnt the way of work in an organization, the importance of being punctual, the importance of maximum commitment, and the importance of team spirit. In my opinion, I have gained lots of

knowledge and experience needed to be successful in

a great engineering challenge, as in my opinion, Engineering is after all a Challenge, and not a Job. In this industrial training I work on the project with collaboration of the industry. I also understand the project methodology used by the industry to solve the various engineering problems.

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REFERENCES 

www.bluestarindia.com



www.storagecontrol.com



www.freelogozone.com

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