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Recent questions tagged steady state
+2
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1
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In a co-flowing (same direction) heat exchanger 1 kg/* air at 500 K flows into one channel and 2 kg/* air flows into the neighboring
asked
Mar 30, 2019
in
Mathematics
by
kratos
availability
thermodynamics
reversible processes
law efficiency
steady state
+2
votes
1
answer
A counter flowing heat exchanger has one line with 2 kg/* at 125 kPa, 1000 K entering and the air is leaving at 100 kPa, 400 K. The other line has
asked
Mar 27, 2019
in
Mathematics
by
kratos
thermodynamics
reversible processes
steady state
+3
votes
1
answer
A certain industrial process requires a steady 0.5 kg/* of air at 200 m/*, at the condition of 150 kPa, 300 K. This air is to be the exhaust from
asked
Mar 25, 2019
in
Mathematics
by
kratos
thermodynamics
bernoulli equation
device efficiency
processes multiple devices
reversible shaft work
steady state
+1
vote
1
answer
Supercharging of an engine is used to increase the inlet air density so that more fuel can be added, the result of which is an increased
asked
Mar 22, 2019
in
Mathematics
by
kratos
thermodynamics
steady state
processes multiple devices
+1
vote
1
answer
A counter-flowing heat exchanger conserves energy by heating cold outside fresh air at 10°C with the outgoing combustion gas
asked
Mar 19, 2019
in
Mathematics
by
kratos
availability
thermodynamics
reversible processes
heat transfer
law efficiency
steady state
+3
votes
1
answer
Saturated water vapor at 20 psia is compressed to 60 psia in a reversible adiabatic process. Find the change in v and T.
asked
Mar 16, 2019
in
Mathematics
by
kratos
bernoulli
thermodynamics
bernoulli equation
reversible processes
polytropic processes
reversible shaft work
steady state
+2
votes
1
answer
An air compressor has a significant heat transfer out. for how high T becomes if no heat transfer. Is that good or should it be insulated?
asked
Mar 15, 2019
in
Mathematics
by
kratos
bernoulli
thermodynamics
reversible processes
device efficiency
processes multiple devices
reversible shaft work
steady state
+2
votes
1
answer
In a heat-powered refrigerator, a turbine is used to drive the compressor using the same working fluid. Consider the combination
asked
Mar 14, 2019
in
Mathematics
by
kratos
thermodynamics
reversible processes
steady single flow devices
processes multiple devices
steady state
+1
vote
1
answer
Water at 100 kPa, 150°C receives 75 kJ/kg in a reversible process by heat transfer. Which process changes * the most:
asked
Mar 13, 2019
in
Mathematics
by
kratos
available energy
thermodynamics
reversible processes
reversible work
polytropic processes
steady state
+1
vote
1
answer
Saturated water vapor at 200 kPa is compressed to 600 kPa in a reversible adiabatic process. Find the new v and T.
asked
Mar 12, 2019
in
Mathematics
by
kratos
bernoulli
thermodynamics
reversible processes
bernoulli equation
reversible shaft work
steady state
+3
votes
1
answer
R-134a at 90 F, 125 psia is throttled so it becomes cold at 10 F. What is exit P?
asked
Mar 11, 2019
in
Mathematics
by
kratos
thermodynamics
throttle flow
reversible processes
steady state
+3
votes
1
answer
Consider the design of a nozzle in which nitrogen gas flowing in a pipe at 500 kPa, 200°C, and at a velocity of 10 m/*, is to be expanded
asked
Mar 10, 2019
in
Mathematics
by
kratos
thermodynamics
reversible processes
steady state
+2
votes
1
answer
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
+2
votes
1
answer
Air in a rigid 1 m^3 box is at 300 K, 200 kPa. It is heated to 600 K by heat transfer from a reversible heat pump that receives energy
asked
Mar 7, 2019
in
Mathematics
by
kratos
carnot cycles
thermodynamics
reversible processes
entropy of ideal gases
available energy
reversible work
polytropic processes
steady state
+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
+2
votes
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
+3
votes
1
answer
Calculate the second law efficiency of the coflowing heat exchanger has one line with 0.25 kg/* oxygen at 17°C, 200 kPa entering
asked
Feb 22, 2019
in
Mathematics
by
kratos
thermodynamics
reversible processes
law efficiency
steady state
+1
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
+2
votes
1
answer
A coflowing heat exchanger has one line with 2 kg/* saturated water vapor at 100 kPa entering. The other line is 1 kg/* air at 200 kPa,
asked
Feb 20, 2019
in
Mathematics
by
kratos
carnot cycles
thermodynamics
reversible processes
law efficiency
steady state
+3
votes
1
answer
A drag force on a car, with frontal area A = 2 m^2, driving at 80 km/h in air at 20°C is Fd = 0.225 A ρairV^2.
asked
Feb 18, 2019
in
Class 9
by
kratos
force displacement work
thermodynamics
reversible processes
class-9
linear equations in two variables
steady state
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