evaporator is at -20°C & 0.1 MPa and the discharge of the condenser is at 30°C & 1.0 MPa. Determine the following: (a) the COP of the system, (b) the Energy Efficiency Ratio in kJ/hr/W, (c) the HP/ton of the system, (d) the Refrigerating Efficiency of the system.

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
Question

Can you also show the T-s and P-h diagrams? 

A Single Stage Vapor Compression (SSVC) refrigeration system has a cooling capacity of 6 tons. The discharge of the evaporator is at -20°C & 0.1 MPa and the discharge of the condenser is at 30°C & 1.0 MPa. Determine the following: (a) the COP of the system, (b) the Energy Efficiency Ratio in kJ/hr/W, (c) the HP/ton of the system, (d) the Refrigerating Efficiency of the system.

PRESSURE, MPa
20
4.
2.
1450
T-40°C
-30 1400
0.80 =
-060-
00
-1.30-
1.40-
OS L
1.60 -
10
8-8,8
20
009
00s
OS
00>
00€
009
8.
007
0901
006
001
002
R-134a
OSI
(1,1,1.2-tevafuoroethane)
00L
Reference state
h= 200.0 Kg. 1.00 kukg K)
for saturated liguid at OC
2.
09
8.
1.
0.8
09
20.
9'0
GL
0.4
1.
0'9
0.2
0.8
0.6
O't
0.1
0.4
0.08
-T-10°C
2.0
0.06
-20
1.5
0.2
0.04
O'L
080
0.1
09'0
0.02
0.08
0,40
0.06
50
0.01
0.04
009
450
009
0.02
Based on formulation of Tiliner Roth and Baehr (1994)
350
00€
ENTHALPY, kJ/kg
0.01
007
Properties computed with: NIST REFPROP
verinn 7.0
001
Transcribed Image Text:PRESSURE, MPa 20 4. 2. 1450 T-40°C -30 1400 0.80 = -060- 00 -1.30- 1.40- OS L 1.60 - 10 8-8,8 20 009 00s OS 00> 00€ 009 8. 007 0901 006 001 002 R-134a OSI (1,1,1.2-tevafuoroethane) 00L Reference state h= 200.0 Kg. 1.00 kukg K) for saturated liguid at OC 2. 09 8. 1. 0.8 09 20. 9'0 GL 0.4 1. 0'9 0.2 0.8 0.6 O't 0.1 0.4 0.08 -T-10°C 2.0 0.06 -20 1.5 0.2 0.04 O'L 080 0.1 09'0 0.02 0.08 0,40 0.06 50 0.01 0.04 009 450 009 0.02 Based on formulation of Tiliner Roth and Baehr (1994) 350 00€ ENTHALPY, kJ/kg 0.01 007 Properties computed with: NIST REFPROP verinn 7.0 001
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