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 30 Nov 2017 My Price 8.00

Vapor-compression refrigeration cycle

10.16   Data for steady-state operation of a vapor-compression refrigeration cycle with Refrigerant 134a as the working fluid are given in the table below. The states are numbered as in Fig. 10.3. The refrigeration capacity is 4.6 tons. Ignoring heat transfer between the compressor and its surroundings, sketch the T–s diagram of the cycle and determine

(a)   the mass flow rate of the refrigerant, in kg/min.

(b)  the isentropic compressor efficiency.

(c)   the coefficient of performance.

(d)   the rates of exergy destruction in the compressor and expansion valve, each in kW.

(e)   the net changes in flow exergy rate of the refrigerant passing through the evaporator and condenser, respectively, each in kW.

Let T0 5 21°C, p0 5 1 bar.

 

State

p (bar)

T (°C)

h (kJ/kg)

s (kJ/kg ? K)

1

1.4

210

243.40

0.9606

2

7

58.5

295.13

1.0135

3

7

24

82.90

0.3113

4

1.4

218.8

82.90

0.33011

Answers

Maurice Tutor
(5)
Status NEW Posted 30 Nov 2017 07:11 PM My Price 8.00

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