A reversible refrigerator operates using a Carnot refrigeration cycle. It operates using r-134a between 140 and 400 kPa. The refrigerant exits the compressor (and enters the condenser) as saturated vapor. It also leaves the condenser as saturated liquid. a. Sketch the P-v and T-s diagram of this cycle. Define the coordinate properties of each state on each graph. b. Evaluate the specific heat and specific work properties of each (in kJ/kg). Indicate the sense. c. Evaluate the coefficient of performance using the specific heats and works from the previous item. Did it match with the COPR obtained if you used the operating temperatures? Solve for states first. Then, show the solution to each of the above required in order.
A reversible refrigerator operates using a Carnot refrigeration cycle. It operates using r-134a between 140 and 400 kPa. The refrigerant exits the compressor (and enters the condenser) as saturated vapor. It also leaves the condenser as saturated liquid. a. Sketch the P-v and T-s diagram of this cycle. Define the coordinate properties of each state on each graph. b. Evaluate the specific heat and specific work properties of each (in kJ/kg). Indicate the sense. c. Evaluate the coefficient of performance using the specific heats and works from the previous item. Did it match with the COPR obtained if you used the operating temperatures? Solve for states first. Then, show the solution to each of the above required in order.
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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A reversible refrigerator operates using a Carnot refrigeration cycle. It operates using
r-134a between 140 and 400 kPa. The refrigerant exits the compressor (and enters the condenser) as
saturated vapor. It also leaves the condenser as saturated liquid.
a. Sketch the P-v and T-s diagram of this cycle. Define the coordinate properties of each state on
each graph.
b. Evaluate the specific heat and specific work properties of each (in kJ/kg). Indicate the sense.
c. Evaluate the coefficient of performance using the specific heats and works from the previous
item. Did it match with the COPR obtained if you used the operating temperatures?
Solve for states first. Then, show the solution to each of the above required in order.
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