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Recent questions tagged irreversible processes
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A closed metallic boiler drum of capacity 0.24m^3 contain steam at a pressure of 11bar and a temperature of 200C.
asked
Mar 8, 2019
in
Class 11
by
kratos
thermodynamics
class-11
steady state
irreversible processes
+3
votes
1
answer
One kg of air at 100 kPa is mixed with one kg air at 200 kPa, both at 300 K, in a rigid insulated tank. Find the final state (P, T) and the entropy
asked
Mar 4, 2019
in
Mathematics
by
kratos
energy equation
thermodynamics
irreversibility
irreversible processes
steady state
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1
answer
The throttle process described in Example 6.5 is an irreversible process. Find the entropy generation per kg ammonia in the throttling process.
asked
Feb 22, 2019
in
Mathematics
by
kratos
thermodynamics
steady state
irreversible processes
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vote
1
answer
Saturated liquid water at 20°C is compressed to a higher pressure with constant temperature. Find the changes
asked
Feb 20, 2019
in
Mathematics
by
kratos
thermodynamics
steady state
entropy of a pure substance
irreversible processes
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1
answer
Carbon dioxide at 300 K, 200 kPa is brought through a steady device where it is heated to 500 K by a 600 K reservoir in a constant pressure
asked
Feb 17, 2019
in
Mathematics
by
kratos
thermodynamics
steady state
irreversible processes
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vote
1
answer
Geothermal underground hot water or steam can be used to generate electric power. Does that violate the second law?
asked
Feb 14, 2019
in
Class 11
by
kratos
multiple devices
class- 11
availability
thermodynamics
cycle processes
irreversible processes
steady state
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votes
1
answer
What is the difference between a nozzle flow and a throttle process?
asked
Feb 9, 2019
in
Mathematics
by
kratos
thermodynamics
irreversibility
the first law of thermodynamics
irreversible processes
device efficiency
steady state
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vote
1
answer
A condenser in a power plant receives 5 kg/* steam at 15 kPa, quality 90% and rejects the heat to cooling water with an average temperature
asked
Feb 6, 2019
in
Mathematics
by
kratos
thermodynamics
irreversibility
irreversible processes
steady state
steady irreversible processes
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vote
1
answer
Consider the steam turbine in Liquid water at 15°C flows out of a nozzle straight up 15 m. What is nozzle Vexit? Is this a reversible process?
asked
Jan 30, 2019
in
Mathematics
by
kratos
thermodynamics
steady state
irreversible processes
+2
votes
1
answer
A condenser in a power plant receives 10 lbm/* steam at 130 F, quality 90% and rejects the heat to cooling water with an average temperature
asked
Jan 15, 2019
in
Mathematics
by
kratos
thermodynamics
irreversibility
irreversible processes
steady state
steady irreversible processes
+3
votes
1
answer
Liquid water at 15°C flows out of a nozzle straight up 15 m. What is nozzle Vexit?
asked
Jan 14, 2019
in
Mathematics
by
kratos
thermodynamics
single flow devices
pipe
heat transfer
device efficiency
irreversible processes
pumps
steady state
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votes
1
answer
A mixing chamber receives 10 lbm/min ammonia as saturated liquid at 0 F from one line and ammonia at 100 F, 40 lbf/in.^2 from another
asked
Dec 22, 2018
in
Mathematics
by
kratos
multiple flow devices
thermodynamics
irreversible processes
steady state
steady irreversible processes
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vote
1
answer
Steam at 500 kPa, 300oC is used to heat cold water at 15°C to 75°C for domestic hot water supply. How much steam per kg
asked
Dec 15, 2018
in
Mathematics
by
kratos
transient processes
phase diagrams
thermodynamics
critical points
irreversible processes
entropy of a liquid or a solid
steady state
+2
votes
1
answer
Which of the processes described below are irreversible? The increase in temprature of an iron rod by hammering it.
asked
Nov 3, 2018
in
Class 11
by
kratos
matter in our surroundings
class-11
thermodynamics
class-9
irreversible processes
steady state
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vote
1
answer
One type of feedwater heater for preheating the water before entering a boiler operates on the principle of mixing the water with steam
asked
Oct 16, 2018
in
Mathematics
by
kratos
thermodynamics
steady state
irreversible processes
+3
votes
1
answer
The condenser in a power plant cools 10 kg/* water at 10 kPa, quality 90% so it comes out as saturated liquid at 10 kPa. The cooling
asked
Oct 11, 2018
in
Mathematics
by
kratos
thermodynamics
irreversibility
exergy balance equation
irreversible processes
steady state
steady irreversible processes
+1
vote
1
answer
A proposal is made to use a geothermal supply of hot water to operate a steam turbine. The high-pressure
asked
Oct 1, 2018
in
Mathematics
by
kratos
multiple devices
throttle flow
thermodynamics
cycle processes
irreversible processes
steady state
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vote
1
answer
Consider the high-pressure closed feedwater heater in the nuclear power plant Mass flow rates and the various states in the cycle
asked
Sep 29, 2018
in
Mathematics
by
kratos
heat exchangers
thermodynamics
single flow devices
irreversibility
irreversible processes
steady state
+2
votes
1
answer
A geothermal supply of hot water at 500 kPa, 150°C is fed to an insulated flash evaporator at the rate of 1.5 kg/*. A stream of saturated liquid
asked
Sep 15, 2018
in
Mathematics
by
kratos
thermodynamics
steady state
availability
irreversible processes
+2
votes
1
answer
Two flowstreams of water, one at 100 lbf/in.^2, saturated vapor, and the other at 100 lbf/in.^2, 1000 F, mix adiabatically in a steady flow process
asked
Sep 8, 2018
in
Mathematics
by
kratos
thermodynamics
steady single flow devices
steady state
irreversible processes
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