Boiler

MARCET BOILER Engr. Syed Waheed ul Hasan

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MARCET BOILER • Stainless steel pressure vessel • Safety relief valve • Temperature and pressure transducers • Water heater is protected from burn out by setting the maximum operating temperature with a temperature controller 5/12/2009

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DESCRIPTION OF ASSEMBLY • PRESSURE VESSEL Capacity ------- 7 liters Material -------stainless steel 304 Operating Pressure----------10 bars Certification------------ DOSH certified • PRESSURE GAUGE Type ------------Bourdon Tube Range ----------- 0-20 bars (g) 5/12/2009

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Description and Assembly • PRESSURE TRANSDUCERS Wetted material ------------ stainless steel Case Material---------------- stainless steel Range ---------- 0-16 bars (abs) • TEMPERATURE SENSOR Type RTD (class A) Range ---------- 0-200 oC • SAFETY FEATURES PR valve (set at 15 bars), TC (set at 185 oC) 5/12/2009

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OBJECTIVE

Our objective here is to collect PT (saturation data) by operating the boiler and compare that data with

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CALACULATION PROCEDURES Obtain the TP saturation data from boiler

• • Plot this TP data(P on abscissa and T on ordinate) • Measure the slope of the plot at each pressure reading.this gives dT/dP • Obtain the values of calculated slope by Clausius Clapeyron equation Feeding it the values of Tsat Vfg and hfg from Steam table. • Calculate the difference of these slopes which gives you the accuracy of of the Clausius Clapeyron equation and strenghtens your measured readings 5/12/2009

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COLLECTING THE SATURATION DATA

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HOW TO MAKE IT SIMPLE… • As it is a very hectic job to calculate slope of the graph at 50 points, it can be made easy by using a machine for that i.e. your PC will calculate it for u. • All you need to do is to tell your machine what it has to do for u, i.e. communicate with your machine. It need a machine language and you can use one that suits you. Lets use MATLAB for that 5/12/2009

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MATLAB • P=[1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 5.8 6 6.2 6.4 6.6 6.8 7 7.5 8 8.5 9 9.5 10]; • T=[373 375.4378.1380.1382.6384.5386.6 388.5390.3391.9393.5394.8396.6398.1399.3 400.7401.9403.3404.5405.7406.8407.8408.9 410.1411.3412.4413.2415 416.8418.8420.3 421.9423.6425.1426.7428.1429.7431 432.1 433.4434.8435.9437.2438.4440.3443.8446.3 448.6450.8452.9];

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• • • • • • • •

TT=polyfit(P,T,4) fitTvalues=polyval(TT,P) plot(P,fitTvalues) hold on plot(P,T) slope=polyder(TT) slopeval=polyval(slope,P) measured=slopeval./100

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ASSIGNMENT to be submitted on 19th

• What are pressure transducers,how they work? Group 1 ok • What is RTD. Working principle,itstypes and reason for different types of RTD? 2 ok • Comparison of RTD with a Thermocouple? 3 ok • What is Pressure relief valve, usage, construction of one mounted on your lab boiler? Group 4 • Comparison of PRV with rupture disk? 5 5/12/2009

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• Submit only one page with your roll numbers mentioned on back side. Don’t use title page. • Address the 4 question in your practical notebook on the 9th page of the MARCET 5/12/2009

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