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The capillary tube used as expansion device in vapour compression system works on the principle of
- a)isothermal expansion causing pressure drop.
- b)adiabatic expansion causing pressure drop.
- c)flow through pipe with friction causing pressure drop.
- d)throttle expansion causing pressure drop.
Correct answer is option 'C'. Can you explain this answer?
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The capillary tube used as expansion device in vapour compression syst...
Principle of Capillary Tube in Vapour Compression System
Capillary tubes are commonly used as expansion devices in vapor compression systems to regulate the flow of refrigerant. The principle behind the operation of a capillary tube is based on the flow through a pipe with friction causing pressure drop.
Flow Through Pipe with Friction
When the high-pressure liquid refrigerant flows through the capillary tube, it encounters resistance due to the small diameter of the tube. This frictional resistance causes a pressure drop in the refrigerant, leading to a decrease in pressure as it moves through the tube.
Pressure Drop
As the pressure drops, the refrigerant undergoes a phase change from liquid to vapor, absorbing heat from the surroundings. This results in cooling of the refrigerant, which is then circulated through the evaporator coil to absorb more heat from the space being cooled.
Throttling Expansion
The capillary tube acts as a throttle valve, controlling the flow of refrigerant into the evaporator coil. By regulating the flow of refrigerant and causing a pressure drop, the capillary tube ensures that the refrigerant evaporates at a lower temperature, effectively cooling the space.
In conclusion, the capillary tube in a vapor compression system works on the principle of flow through a pipe with friction causing pressure drop. This design allows for efficient cooling and regulation of the refrigerant flow in the system.
Capillary tubes are commonly used as expansion devices in vapor compression systems to regulate the flow of refrigerant. The principle behind the operation of a capillary tube is based on the flow through a pipe with friction causing pressure drop.
Flow Through Pipe with Friction
When the high-pressure liquid refrigerant flows through the capillary tube, it encounters resistance due to the small diameter of the tube. This frictional resistance causes a pressure drop in the refrigerant, leading to a decrease in pressure as it moves through the tube.
Pressure Drop
As the pressure drops, the refrigerant undergoes a phase change from liquid to vapor, absorbing heat from the surroundings. This results in cooling of the refrigerant, which is then circulated through the evaporator coil to absorb more heat from the space being cooled.
Throttling Expansion
The capillary tube acts as a throttle valve, controlling the flow of refrigerant into the evaporator coil. By regulating the flow of refrigerant and causing a pressure drop, the capillary tube ensures that the refrigerant evaporates at a lower temperature, effectively cooling the space.
In conclusion, the capillary tube in a vapor compression system works on the principle of flow through a pipe with friction causing pressure drop. This design allows for efficient cooling and regulation of the refrigerant flow in the system.
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The capillary tube used as expansion device in vapour compression system works on the principle ofa)isothermal expansion causing pressure drop.b)adiabatic expansion causing pressure drop.c)flow through pipe with friction causing pressure drop.d)throttle expansion causing pressure drop.Correct answer is option 'C'. Can you explain this answer?
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The capillary tube used as expansion device in vapour compression system works on the principle ofa)isothermal expansion causing pressure drop.b)adiabatic expansion causing pressure drop.c)flow through pipe with friction causing pressure drop.d)throttle expansion causing pressure drop.Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The capillary tube used as expansion device in vapour compression system works on the principle ofa)isothermal expansion causing pressure drop.b)adiabatic expansion causing pressure drop.c)flow through pipe with friction causing pressure drop.d)throttle expansion causing pressure drop.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The capillary tube used as expansion device in vapour compression system works on the principle ofa)isothermal expansion causing pressure drop.b)adiabatic expansion causing pressure drop.c)flow through pipe with friction causing pressure drop.d)throttle expansion causing pressure drop.Correct answer is option 'C'. Can you explain this answer?.
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