In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a saturated vapor and is cooled to the saturated liquid state in the condenser. It is then throttled to the evaporator pressure and vaporizes as it absorbs heat from the refrigerated space. Figure Q3.1 depicts the description of this process. Warm environment Condenser W Expansion valve Compressor Evaporator Cold refrigerated space Figure Q3.1: Ideal vapor-compression refrigeration cycle. (b) The same working fluid enters the condenser that operates between 0.14 to 0.8 MPa, and flow rate of refrigerant is 0.05 kg/s, Evaluate the rate of heat removal from the refrigerated space and the power input to the compressor. (i) (ii) Analyze the rate of heat rejection to the environment. (iii) Determine the COP of the refrigerator for this process. (iv) Predict the power input if the throttling valve is replaced by an isentropic turbine. Justify on the difference on the power input measured between throttling valve and turbine. (v)

In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a saturated vapor and is cooled to the saturated liquid state in the condenser. It is then throttled to the evaporator pressure and vaporizes as it absorbs heat from the refrigerated space. Figure Q3.1 depicts the description of this process. Warm environment Condenser W Expansion valve Compressor Evaporator Cold refrigerated space Figure Q3.1: Ideal vapor-compression refrigeration cycle. (b) The same working fluid enters the condenser that operates between 0.14 to 0.8 MPa, and flow rate of refrigerant is 0.05 kg/s, Evaluate the rate of heat removal from the refrigerated space and the power input to the compressor. (i) (ii) Analyze the rate of heat rejection to the environment. (iii) Determine the COP of the refrigerator for this process. (iv) Predict the power input if the throttling valve is replaced by an isentropic turbine. Justify on the difference on the power input measured between throttling valve and turbine. (v)

Name: In an ideal vapor-compression refrigeration cycle, the refrigerant en
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Description: In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor asa saturated vapor and is cooled to the saturated liquid state in the condenser. It is thenthrottled to the evaporator pressure and vaporizes as it absorbs hea

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as
a saturated vapor and is cooled to the saturated liquid state in the condenser. It is then
throttled to the evaporator pressure and vaporizes as it absorbs heat from the refrigerated
space. Figure Q3.1 depicts the description of this process.
Warm
environment
Condenser
Win
Expansion
valve
Compressor
Evaporator
Cold refrigerated
space
Figure Q3.1: Ideal vapor-compression refrigeration cycle.
(b) The same working fluid enters the condenser that operates between 0.14 to 0.8 MPa,
and flow rate of refrigerant is 0.05 kg/s,
Evaluate the rate of heat removal from the refrigerated space and the power
input to the compressor.
(i)
(ii)
Analyze the rate of heat rejection to the environment.
(iii)
Determine the COP of the refrigerator for this process.
(iv) Predict the power input if the throttling valve is replaced by an isentropic
turbine.
Justify on the difference on the power input measured between throttling
valve and turbine.
(v)

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