Define and explain the following terms :Mass Fractions,Mole Fraction,Theoretical or stoichiometric air. Expalin Excess Air, be Actual Air and AIr Fuel Ratio Appraise with Neat Sketch Orsat Appratus. Appraise with Neat Sketch Bombs Calorimeter Calorific value - HCV & LCV. Define Equivalent Evaporation (Me), Boiler Efficiency and Heat Balance Sheet.
In a Boiler Test of coal 1250 kg of coal consumed in 24 hrs Mass of Water Evaporated 13000 Kg and m.c.p 7 bar. Feed water temp. 40°C and heating value of coal is 30,000 KJ/Kg. Taking enthalpy of 7 kg of steam at 7 bar as 2570 kg, Find eq. evaporation /per Kg of coal and boiler efficiency:
The following data refers to a steam power plant consisting boiler, super-heater, and an economizer. Steam pressure P=20 bar, Ms= 10000 KJ/Kg. Mass of coal used mf= 1300Kg/hr e.v. of coal=29000.Temperature of feed water entering economizer (t1) = 35°C.Leaving economizer (t2) = 105 °C.Temp of super-heated steam leaving super-heater (Tsup) = 350°C and dryness fraction (x) = 0.98.Determine:Overall efficiency of plant, Equivalent Evaporation from and at 100°C, % of heat utilized in boiler, super-heater and economizer.
The following results were obtained from boiler trial:Feed water/ hr = 700kg, Feed temp= 27°C, Steam pressure = 8 bar 4) x = 0.97, coal consumption = 100Kg hr, C.V = 25000 KJ/Kg, Un-burnt coal = 7.25Kg hr, C.V = 2000 KJ/Kg, Flue formed / kg = 17.3 Kg, flue temp = 325°C, Cp gas = 1.025 KJ/ Kg K, room air temp = 16°C, Draw OP heat balance sheet in KJ/min and find boiler efficiency. OR A boiler is equipped with Chimney of 24 m height the ambient temperature is 25°C the temperature of flue gases passing through chimney is 300 °C if air flow through c.c is 20 KJ/ kg of fuel burnt thenTheoretical draught in cm of water columnVelocity of flue gases passing through Chimney of 50% head lost in friction.
How much air per kg of coal is burnt into a boiler having Chimney height of 32.3 m to create a draught of 19 mm of water column when temperature of flue gases leaving chimney is 370 °C and temperature of boiler house is 29.5 °C. Also calculate produce in terms of hot gas column.
For SE (2019 patt) Insem Sep 2024 Examination Follow Following Tips
1. Solve Complete paper. 2.Draw neat labeled Diagrams. 3. Prepare Zeroth Law, first and Second statements with sketeches 4. Prepare Numericals on 4.1 First Law dQ=DW Q1+Q2+Q3+Q4= W1+W2+W3+W4 4.2 dQ=dU+ DW Prepare Tabular Numerical on dQ=dU+ DW Remember For Cyclic Process DU=0 and dQ=DW. 5. Numerical On Heat Engine, Refrigerator and Heat Pump. 6. Ideal Gas Process Equation Table with all seven processes.PV and TS Diagrams. 7.PV=mRT equation and Numerical. 8.See diagram of T
Prove that Entropy as a property of a system.
"300 kJ/s of heat is supplied at a constant fixed temperature of 290°C to a heat engine. The heat rejection takes place at 8.5°C. The following resultswere obtained: (i) 215 kJ/s are rejected. (ii) 150 kJ/s are rejected. (iii) 75 kJ/s are rejected.
Classify which of the result report a reversible cycle or irreversible cycle or impossible results."
Critique AE and UE.
A System at 450K receives 225 KJ/S of heat energy from a source at 1500K. The temperature of Source and System both remains Constant during Heat Transfer.Represent Process on T-S diag (1 Mark), Net change in entropy (2 Mark), Available enegy(1 M ark), Decrease in AE (2 Mark). Assume atmospheric temp. equals to 300K.
A sample of steam at 200ᴼC and a pressure of 7 bar is first expanded at a constant enthalpy to 3 bar and then at constant entropy to 0.5 bar with the help of mollier chart .determine the change of entropy and enthalpy during the process
A steam at a pressure of 10 bar and 0.9 dryness fraction is throttled to a pressure of 2 bar determine the exit condition of steam using mollier chart
Explain Conversion of ICE to Steam with the help of T-V diagram
Shyamsing Thakur
Shyamsing Thakur
Define and explain the following terms :Mass Fractions,Mole Fraction,Theoretical or stoichiometric air.
Expalin Excess Air, be Actual Air and AIr Fuel Ratio
Appraise with Neat Sketch Orsat Appratus.
Appraise with Neat Sketch Bombs Calorimeter
Calorific value - HCV & LCV.
Define Equivalent Evaporation (Me), Boiler Efficiency and Heat Balance Sheet.
In a Boiler Test of coal 1250 kg of coal consumed in 24 hrs Mass of Water Evaporated 13000 Kg and m.c.p 7 bar. Feed water temp. 40°C and heating value of coal is 30,000 KJ/Kg. Taking enthalpy of 7 kg of steam at 7 bar as 2570 kg, Find eq. evaporation /per Kg of coal and boiler efficiency:
The following data refers to a steam power plant consisting boiler, super-heater, and an economizer. Steam pressure P=20 bar, Ms= 10000 KJ/Kg. Mass of coal used mf= 1300Kg/hr e.v. of coal=29000.Temperature of feed water entering economizer (t1) = 35°C.Leaving economizer (t2) = 105 °C.Temp of super-heated steam leaving super-heater (Tsup) = 350°C and dryness fraction (x) = 0.98.Determine:Overall efficiency of plant, Equivalent Evaporation from and at 100°C, % of heat utilized in boiler, super-heater and economizer.
The following results were obtained from boiler trial:Feed water/ hr = 700kg, Feed temp= 27°C, Steam pressure = 8 bar 4) x = 0.97, coal consumption = 100Kg hr, C.V = 25000 KJ/Kg, Un-burnt coal = 7.25Kg hr, C.V = 2000 KJ/Kg, Flue formed / kg = 17.3 Kg, flue temp = 325°C, Cp gas = 1.025 KJ/ Kg K, room air temp = 16°C, Draw OP heat balance sheet in KJ/min and find boiler efficiency. OR
A boiler is equipped with Chimney of 24 m height the ambient temperature is 25°C the temperature of flue gases passing through chimney is 300 °C if air flow through c.c is 20 KJ/ kg of fuel burnt thenTheoretical draught in cm of water columnVelocity of flue gases passing through Chimney of 50% head lost in friction.
How much air per kg of coal is burnt into a boiler having Chimney height of 32.3 m to create a draught of 19 mm of water column when temperature of flue gases leaving chimney is 370 °C and temperature of boiler house is 29.5 °C. Also calculate produce in terms of hot gas column.
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Shyamsing Thakur
ET Insem Paper 2024 Was
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Shyamsing Thakur
For SE (2019 patt) Insem Sep 2024 Examination
Follow Following Tips
1. Solve Complete paper.
2.Draw neat labeled Diagrams.
3. Prepare Zeroth Law, first and Second statements with sketeches
4. Prepare Numericals on
4.1 First Law dQ=DW Q1+Q2+Q3+Q4= W1+W2+W3+W4
4.2 dQ=dU+ DW
Prepare Tabular Numerical on dQ=dU+ DW
Remember For Cyclic Process DU=0 and dQ=DW.
5. Numerical On Heat Engine, Refrigerator and Heat Pump.
6. Ideal Gas Process Equation Table with all seven processes.PV and TS Diagrams.
7.PV=mRT equation and Numerical.
8.See diagram of T
and Refer All study material provided
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Shyamsing Thakur
Thermodynamics Unit 3 and Unit 4
State & Prove Clausius inequality
Prove That S2 - S1 = Cp ln(T2/T1) - R ln (P2/P1)
Write Assumption made for Carnot Cycle
Prove that Entropy as a property of a system.
"300 kJ/s of heat is supplied at a constant fixed temperature of 290°C to a heat
engine. The heat rejection takes place at 8.5°C. The following resultswere obtained:
(i) 215 kJ/s are rejected.
(ii) 150 kJ/s are rejected.
(iii) 75 kJ/s are rejected.
Classify which of the result report a reversible cycle or irreversible cycle or
impossible results."
Critique AE and UE.
A System at 450K receives 225 KJ/S of heat energy from a source at 1500K. The temperature of Source and System both remains Constant during Heat Transfer.Represent Process on T-S diag (1 Mark), Net change in entropy (2 Mark), Available enegy(1 M ark), Decrease in AE (2 Mark). Assume atmospheric temp. equals to 300K.
A sample of steam at 200ᴼC and a pressure of 7 bar is first expanded at a constant enthalpy to 3 bar and then at constant entropy to 0.5 bar with the help of mollier chart .determine the change of entropy and enthalpy during the process
A steam at a pressure of 10 bar and 0.9 dryness fraction is throttled to a pressure of 2 bar determine the exit condition of steam using mollier chart
Explain Conversion of ICE to Steam with the help of T-V diagram
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