3. A vapor compression heat pump cycle uses R134a as the working fluid. The heat pump provides 35 kW to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar and saturated liquid exits the condenser at 8 bar. Pertinent data at each state are provided in Table 2. Assuming a compressor isentropic efficiency of 75%, determine the following: a. The mass flow rate of the working fluid in kg/s The power input for the compressor, in kW b. c. The coefficient of performance (COP) of the cycle d. Represent the heat pump cycle on a T-s diagram, showing all states, processes, and energy

3. A vapor compression heat pump cycle uses R134a as the working fluid. The heat pump provides 35 kW to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar and saturated liquid exits the condenser at 8 bar. Pertinent data at each state are provided in Table 2. Assuming a compressor isentropic efficiency of 75%, determine the following: a. The mass flow rate of the working fluid in kg/s The power input for the compressor, in kW b. c. The coefficient of performance (COP) of the cycle d. Represent the heat pump cycle on a T-s diagram, showing all states, processes, and energy

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

100%

State
1
2s
2
3
4
Table 2: Properties Given for Problem 3
P (bar)
h (kJ/kg)
1.6
237.97
8
271.22
8
h₂ = ?
8
93.42
1.6
h4 = ?

3. A vapor compression heat pump cycle uses R134a as the working fluid. The heat pump provides 35
kW to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor
enters the compressor at 1.6 bar and saturated liquid exits the condenser at 8 bar. Pertinent data at
each state are provided in Table 2. Assuming a compressor isentropic efficiency of 75%, determine
the following:
a.
The mass flow rate of the working fluid in kg/s
b. The power input for the compressor, in kW
C.
The coefficient of performance (COP) of the cycle
d. Represent the heat pump cycle on a T-s diagram, showing all states, processes, and energy
transfers

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