7. A central air conditioner removes heat at the rate of 44,500BTU/hr from inside of a house at 20.0°C. Outside of the house it is 40.0°C. The coefficient of performance of this air conditioner is K=14.2. a) Find the magnitudes of Qc, Qh, and Wk in joules for one hour of operation of the air conditioner. Use 1 BTU=1,054J. b) Draw the heat flow schematic on the figure to the right for one hour of operation of the air conditioner. Show your energy values on the figure and show arrows for energy flow directions. Th c) Find the power in horsepower of the motor needed to drive this refrigerator. Refrigerator Te d) What is the maximum K that could possibly be achieved by any air conditioner for this house under these conditions? e) Fill in on the line below the maximum K, show your value from part d), show the given K, and identify the possible and impossible regions on the line. Worthless Perfect refrigerator refrigerator K=0 Kmax=

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7. A central air conditioner removes heat at the rate of 44,500BTU/hr from inside of a house at 20.0°C.
Outside of the house it is 40.0°C. The coefficient of performance of this air conditioner is K=14.2.
a) Find the magnitudes of Qc, Qh, and Wk in joules for one hour of
operation of the air conditioner. Use 1 BTU=1,054J.
b) Draw the heat flow schematic on the figure to the right for one
hour of operation of the air conditioner. Show your energy
values on the figure and show arrows for energy flow directions.
Th
c) Find the power in horsepower of the motor needed to drive this
refrigerator.
Refrigerator
Te
d) What is the maximum K that could possibly be achieved by any air conditioner for this house under
these conditions?
e) Fill in on the line below the maximum K, show your value from part d), show the given K, and identify
the possible and impossible regions on the line.
Worthless
Perfect
refrigerator
refrigerator
K=0
Kmax=
Transcribed Image Text:7. A central air conditioner removes heat at the rate of 44,500BTU/hr from inside of a house at 20.0°C. Outside of the house it is 40.0°C. The coefficient of performance of this air conditioner is K=14.2. a) Find the magnitudes of Qc, Qh, and Wk in joules for one hour of operation of the air conditioner. Use 1 BTU=1,054J. b) Draw the heat flow schematic on the figure to the right for one hour of operation of the air conditioner. Show your energy values on the figure and show arrows for energy flow directions. Th c) Find the power in horsepower of the motor needed to drive this refrigerator. Refrigerator Te d) What is the maximum K that could possibly be achieved by any air conditioner for this house under these conditions? e) Fill in on the line below the maximum K, show your value from part d), show the given K, and identify the possible and impossible regions on the line. Worthless Perfect refrigerator refrigerator K=0 Kmax=
Expert Solution
Step 1

Consider given data as below.

Rate of heat remove, Qremove=44500 BTUhr

Temperature inside house, Tc=20°C=293.15 K

Temperature outside house, Th=40°C=313.15 K

Time, t=1 hr=3600 s

Unit, 1 BTU=1054 J

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