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Recent questions tagged heat engines
+2
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1
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A steam engine operating between a boiler temperature of 220°C and a condenser temperature of 35.0°C
asked
Apr 5, 2019
in
Class 11
by
kratos
refrigerators
class-11
heat engines
thermodynamics
inequality of clausius
+1
vote
1
answer
What is Geothermal energy? How can it be harnessed to produce electrical energy.
asked
Apr 3, 2019
in
Class 10
by
kratos
cbse
refrigerators
heat engines
thermodynamics
class-10
sources of energy
+3
votes
1
answer
Electric solar cells can produce power with 15% efficiency. Compare that to a heat engine driving an electric generator
asked
Apr 2, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+3
votes
1
answer
The efficiency of heat engine is 30% If it gives 30 KJ heat to the heat sink, than it should have absorbed ……. KJ heat from heat source.
asked
Mar 10, 2019
in
JEE
by
kratos
jee main 2021
refrigerators
class-11
jee
heat engines
thermodynamics
jee mains
jee main
+3
votes
1
answer
In a steam power plant 1000 Btu/* is added at 1200 F in the boiler, 580 Btu/* is taken out at 100 F in the condenser and the pump work is 20 Btu/*.
asked
Mar 9, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+1
vote
1
answer
An air-conditioner discards 5.1 kW to the ambient with a power input of 1.5 kW. Find the rate of cooling and the coefficient
asked
Feb 10, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+3
votes
1
answer
A gasoline engine produces 20 hp using 35 kW of heat transfer from burning fuel. What is its thermal efficiency
asked
Jan 24, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
law efficiency
heat engines
+2
votes
1
answer
For each of the cases below determine if the heat engine satisfies the first law (energy equation) and if it violates the second law.
asked
Jan 23, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+1
vote
1
answer
For each of the cases below determine if the heat engine satisfies the first law (energy equation) and if it violates the second law.
asked
Jan 22, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+1
vote
1
answer
A farmer runs a heat pump with a motor of 2 kW. It should keep a chicken hatchery at 30°C which loses energy at a rate of 0.5 kW
asked
Jan 12, 2019
in
Mathematics
by
kratos
refrigerators
heat engines
thermodynamics
rates or fluxes of entropy
heat transfer
+1
vote
1
answer
Consider the four cases of a heat engine satisfies the first law (energy equation) and if it violates the second law
asked
Jan 9, 2019
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
second law and processes
+1
vote
1
answer
A large stationary diesel engine produces 20 000 hp with a thermal efficiency of 40%. The exhaust gas, which we assume is air,
asked
Dec 25, 2018
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
exergy balance equation
+2
votes
1
answer
An air conditioner cools a house at TL = 20°C with a maximum of 1.2 kW power input. The house gains 0.6 kW per degree
asked
Nov 2, 2018
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
heat transfer
+3
votes
1
answer
A power plant generates 150 MW of electrical power. It uses a supply of 1000 MW from a geothermal source and rejects
asked
Oct 31, 2018
in
Mathematics
by
kratos
thermodynamics
refrigerators
heat engines
+2
votes
1
answer
A farmer runs a heat pump with a 2 kW motor. It should keep a chicken hatchery at 30°C, which loses energy at a rate of 10 kW
asked
Oct 30, 2018
in
Mathematics
by
kratos
refrigerators
heat engines
thermodynamics
rates or fluxes of entropy
heat transfer
+3
votes
1
answer
A farmer runs a heat pump using 2.5 hp of power input. It keeps a chicken hatchery at a constant 86 F while the room loses 20 Btu/*
asked
Sep 15, 2018
in
Mathematics
by
kratos
refrigerators
heat engines
thermodynamics
rates or fluxes of entropy
heat transfer
+2
votes
1
answer
A window air-conditioner unit is placed on a laboratory bench and tested in cooling mode using 750 W of electric
asked
Sep 7, 2018
in
Mathematics
by
kratos
refrigerators
heat engines
carnot cycles
thermodynamics
heat transfer
+1
vote
1
answer
Compare between work and heat ?
asked
Aug 27, 2018
in
Class 11
by
kratos
refrigerators
class-11
heat engines
available energy
thermodynamics
reversible work
+3
votes
1
answer
A farmer runs a heat pump with a 2 kW motor. It should keep a chicken hatchery at 90 F, which loses energy at a rate of 10 Btu/* to the colder
asked
Aug 12, 2018
in
Mathematics
by
kratos
refrigerators
heat engines
thermodynamics
rates or fluxes of entropy
heat transfer
+3
votes
1
answer
A farmer runs a heat pump using 2 kW of power input. It keeps a chicken hatchery at a constant 30°C while the room loses 10 kW to the colder
asked
Aug 10, 2018
in
Mathematics
by
kratos
refrigerators
heat engines
thermodynamics
rates or fluxes of entropy
heat transfer
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