Consider an ideal refrigeration cycle which use R-134 a as the working fluid. The temperature of the refrigerant in the evaporator is -10oC and in the condenser is 36oC. If the refrigerant flow rate is 0.5 kg/s, please calculate COP (coefficient of performance) and the plant cooling capacity?
Consider an ideal refrigeration cycle which use R-134 a as the working fluid. The temperature of the refrigerant in the evaporator is -10oC and in the condenser is 36oC. If the refrigerant flow rate is 0.5 kg/s, please calculate COP (coefficient of performance) and the plant cooling capacity?
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter22: Condensers
Section: Chapter Questions
Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...
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Consider an ideal refrigeration cycle which use R-134 a as the working fluid. The temperature of the refrigerant in the evaporator is -10oC and in the condenser is 36oC. If the refrigerant flow rate is 0.5 kg/s, please calculate COP (coefficient of performance) and the plant cooling capacity?
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Which R134a table is referring to? My reference as attached. The answer result should be different?
Transcribed Image Text:Pression (MPa)
Pressure
Pres- Density, Volume,
Temp., sure, kg/m³ m³/kg
MPa Liquid Vapor Liquid Vapor Liquid Vapor
-10.00 0.20060 1327.1 0.09959 186.70 392.66 0.9506 1.7334
36.00 0.91185 1163.4 0.02238 250.48 417.65 1.1717 1.7124 1.476 1.111
100
20.
10.
8.
6.
4.
2.
1.
0.0
0.6
0.4
0.2
0.1
0.08
0.06
0.04
0.02
0.01
Refrigerant 134a (1,1,1,2-Tetrafluoroethane)
Entropy,
kJ/(kg-K)
150
HFC-134a
(1,1,124)
fence sedere
2000 kg; s=1.00 K)
forcatura queda
pour quidescu 0°C
3 2/2 2/2
100
pely NIST
2. Pye Laver Not Diana 201
M
150
Enthalpy,
kJ/kg
--00
200
200
250
819-8-18
250
Properties of Saturated Liquid and Saturated Vapor
Velocity of Viscosity, Thermal Cond
Sound, m/s
Pa's
Specific Heat
Surface
p. kJ/(kg-K) plc.
mW/(mK)
Tension, Temp..
Liquid Vapor Vapor Liquid Vapor Liquid Vapor Liquid Vapor mN/m °C
306.6 10.33
172.1 12.34
1.316 0.854 1.167
1.273
668. 146.9
455. 141.6
96.5 10.66 13.02 -10,00
76.4 14.98
6,64 36.00
300
300
350
400
XNXX
350
Enthalpy - Enthalpie (kJ/kg)
400
450
450
-60%
28
500
= 500 kg/m²
400L
100
300.
UN
LONE
JOKO KI
560
200
09
•DPI+'
is.
EN
BUST
-1-160
550
88/8
40.
SITR
18-42
#T
F
30.
4
+ Pe
20
15.
10.
8.0
60
40
IN
T
++
30
2.0
1.5
M
1.0
-0.80
0,60
500
Inteligente Angered
177, Ves, Fal/Tr
6:00
200.
100.
80.
60.
599
40.
20.
10.
8.
6,
4.
1.
0.8
0.8
0,4
0.2
0.1
6:00
Pressure Pression (bar)
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