Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 05 Jan 2018 My Price 8.00

vapor- compression heat pump

10.41 Refrigerant 134a enters the compressor of a vapor- compression heat pump at 15 lbf/in.2, 08F and is compressed adiabatically to 160 lbf/in.2, 1608F. Liquid enters the expansion valve at 160 lbf/in.2, 958F. At the valve exit, the pressure is 15 lbf/in.2

(a)   Determine the isentropic compressor efficiency.

(b)   Determine the coefficient of performance.

(c)   Perform a full exergy accounting of the compressor

10.44 Air enters the compressor of a Brayton refrigeration cycle at 100 kPa, 270 K. The compressor pressure ratio is 3, and the temperature at the turbine inlet is 315 K. The compressor and turbine have isentropic efficiencies of 82% and 85%, respectively. Determine the

(a)   net work input, per unit mass of air flow, in kJ/kg.

(b)   exergy accounting of the net power input, in kJ per kg of air flowing. Discuss.

 

power input, in Btu per lb of refrigerant flowing. Discuss.

Let T0

5 315 K.

 

Let T0  5 4808R.

Answers

Maurice Tutor
(5)
Status NEW Posted 05 Jan 2018 02:01 PM My Price 8.00

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