An air conditioning unit operates on the simple refrigeration cycle using R-134a as the working fluid. The pressure bounds for the cycle are 550 kPa and 1200 kPa. The refrigeration system is maintaining a home at 26°C while the outdoor temperature is 34°C. Electronic devices inside the home (TV, computer, etc.) dissipate heat at a rate of 1200 W, and the home gains thermal energy through the walls and windows at a rate of 220 kJ/min. There are also people in the home dissipating thermal energy at a yet-unknown rate. The refrigerant exits the condenser as a saturated liquid, exits the evaporator as a saturated vapor, and the compressor has an isentropic efficiency of 85%. Determine the total rate of heat dissipated by the occupants of the home if the compressor consumes power at a rate of 900 W.

An air conditioning unit operates on the simple refrigeration cycle using R-134a as the working fluid. The pressure bounds for the cycle are 550 kPa and 1200 kPa. The refrigeration system is maintaining a home at 26°C while the outdoor temperature is 34°C. Electronic devices inside the home (TV, computer, etc.) dissipate heat at a rate of 1200 W, and the home gains thermal energy through the walls and windows at a rate of 220 kJ/min. There are also people in the home dissipating thermal energy at a yet-unknown rate. The refrigerant exits the condenser as a saturated liquid, exits the evaporator as a saturated vapor, and the compressor has an isentropic efficiency of 85%. Determine the total rate of heat dissipated by the occupants of the home if the compressor consumes power at a rate of 900 W.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

An air conditioning unit operates on the simple refrigeration cycle using R-134a as the working fluid. The
pressure bounds for the cycle are 550 kPa and 1200 kPa. The refrigeration system is maintaining a home
at 26°C while the outdoor temperature is 34°C. Electronic devices inside the home (TV, computer, etc.)
dissipate heat at a rate of 1200 W, and the home gains thermal energy through the walls and windows at
a rate of 220 kJ/min. There are also people in the home dissipating thermal energy at a yet-unknown rate.
The refrigerant exits the condenser as a saturated liquid, exits the evaporator as a saturated
vapor, and the compressor has an isentropic efficiency of 85%.
Determine the total rate of heat dissipated by the occupants of the home if the compressor
consumes power at a rate of 900 W.

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