Pbl%20report.docx

Pillai's Institute of Information Technology Engineering, Media Studies & Research Dr. K. M. Vasudevan Pillai Campus, Plot No. 10, Sector 16, New Panvel, Navi Mumbai, Maharashtra 410206.0

Project Base Learning TOPIC : To Raise The Coin Using The Power of Candle Light GROUP MEMBERS :

Sr.no. Roll no

Students name

1

43

Sumit Thali

2

45

Rohan Kinare

3

46

Akshay Ghadge

4

47

Domraj Nair

1

Table of Content . Sr no

Content

Page no

1

Introduction

3

2

Terms and conditions

4

3

Ideas and Plans

5

4

Main challenges

6

Information about selected idea

7

Theory base interpretation

8

5

6

7

Gallery 9

2

INTRODUCTION The project is based upon the concept of thermodynamics and heat transfer in which the task is to raise the coin of 2Rs from ground level to a certain height. The maximum the height the max point gained by the group . The maximum members in the group should not exceed by 4 members . The task of project base learning was given to the classes nearly 4th week of July . The pbl was based on heat transfer subject which is introduced by Mumbai university in the 5th sem of engineering. The importance of heat transfer helps you to understand how to determine the process of heat which you are been exposed to there such as conduction convection, radiation. Understand the process which you can use and analysis of heat that you need to use for your product. Some parts of thermodynamics which are used by mechanical engineers in the fields of heat conversion. Mechanical engineers use thermo-science to design engines and power plants, heating, ventilation and air conditioning (HVAC) systems, heat exchanger, heat sinks, radiators, refrigeration, insulation and others.

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TERMS AND CONDITION : (GIVEN)

4

Different ideas : The three main ideas which came in to our mind are as follows ; 1.Expansion of copper wire based ideas to lift the coin 2.Hot air balloon 3.Sterling engine

1. Expansion of copper wire based ideas to lift the coin Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, through heat transfer .the main aim was to load the copper wire using counter weights and introduce the heat to the wire at a point where stress concentration in the copper wire is more . so that it can continue to expand under stress and strain and also through the thermal expansion coefficient . then the translatory downward motion of the counter weights wold be use further to lift the coin using leverage mechanism .

2. Hot air balloon The concept of hot air balloon was a simple concept to raise the coin using the candle light . the air inside the balloon expand due to the heat introduced which raise the balloon to a certain height .

3.Stirling engine A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas at different temperatures, such that there is a net conversion of heat energy to mechanical work.

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Main challenges and plans : 1.Main challenges in copper wire expansion method : The displacement of the coin which will be going to take place through this concept was small enough. Because the copper wire expansion is very small compare which can raise the coin to a very small limit compare to another to ideas.

2. Main challenges in making Hot air balloon The main disadvantage of the hot air balloon was that the coin would not be raised at constant position the balloon comes down and goes up at a certain interval of time the heat supplied for the expansion of the air inside balloon was fluctuating due to the air flow in the atmosphere and the contact of the flame to the ballon can lead to the burning of baloon.

3. The main challenges in making Stirling engine The power receiving from the engine will be good enough to raise the coin from the ground level . but the main problem is that to design a separate mechanism rather than the heat engine to lift the coin because the heat engine produces the rotary motion and the motion required to raise the coin was the reciprocatory . so the design is complex and is challenging.

The idea selected by our group temporarily . The concept of the sterling engine is a good choice due to its power factor .

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Some information about stirling engine :

Application of stirling engine :

1) Stirling engine is used in some submarines because this engine produce very less noise thus serving its purpose for submarine which is used for secret purposes. 2) It is used as solar stirling engine in some countries like New Zealand to generate electricity. It is more efficient than non concentrated photovoltaic cells 3) It works on temperature difference, so reveresly it can be used to generate temperature difference by providing mechanical energy. In this way it can used both as heat pump and coolers. The cryocoolers can be used to achieve temperature as low as -73K or -200° C . This temperature is enough to liquify most of the gases. But its cost is high. 7

Gallery :

8

SOLID WORK 3D VIEW

9

10

Earlier ideas :

Expansion of copper wire based project

Simple hot air ballon

11

Type 1 sterling engine

12

Real prototype

13

conclusion The Stirling engine is noted for its high efficiency compared to steam engines, quiet operation, and the ease with which it can use almost any heat source. This engine is currently exciting interest as the core component of micro combined heat and power (CHP) units, in which it is more efficient and safer than a comparable steam engine

Result : The coin was not being lifted because of insufficient amount of heat given by 2 candle and also the limitation in selection of the wright method to lift the coin there was restriction to use any motor , by which it could be possible to lift the coin using seebeck and peltier effect. According to the pbl review motor was prohibited to use in lifting of coin but one day before pbl submission this prohibition was removed and peltier module was allowed to used so we made nochanges in the modal and submitted the unsuccessful modal .

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