Atmospheric air from the inside of an automobile enters the evaporator section of the air conditioner at 1 atm, 27 C and 50 percent relative humidity. The air returns to the automobile at 10 C and 90 percent relative humidity. The passenger compartment has a volume of 2 m3 and 5 air changes per minute are required to maintain the inside of the automobile at the desired comfort level. Sketch the psychrometric diagram for the atmospheric air flowing through the air conditioning process. Determine the dew point and wet bulb temperatures at the inlet to the evaporator section, in 8 C. Answer the required heat transfer rate from the atmospheric air to the evaporator fluid, in kW.  Answer the rate of condensation of water vapor in the evaporator section, in kg/min. Answer

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter50: Commercial, Packaged Rooftop, Variable Refrigerant Flow, And Variable Air Volume Systems
Section: Chapter Questions
Problem 12RQ: Free-cooling can be accomplished if the A. enthalpy of the return air is lower than the enthalpy of...
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Atmospheric air from the inside of an automobile enters the evaporator section of the air conditioner at 1 atm, 27 C and 50 percent relative humidity. The air returns to the automobile at 10 C and 90 percent relative humidity. The passenger compartment has a volume of 2 m3 and 5 air changes per minute are required to maintain the inside of the automobile at the desired comfort level. Sketch the psychrometric diagram for the atmospheric air flowing through the air conditioning process. Determine the dew point and wet bulb temperatures at the inlet to the evaporator section, in 8 C. Answer the required heat transfer rate from the atmospheric air to the evaporator fluid, in kW.  Answer the rate of condensation of water vapor in the evaporator section, in kg/min. Answer

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