Catalogue data for R-32 compressor with a displacement of 80 L/s show the capacity to be 8 tons when the suction conditions are 0.2 MPa and -20°C and condensing temperature is 50°C. The refrigerant leaves the condenser as saturated liquid. Calculate the actual volumetric efficiency and the brake work of the compressor if the compressor efficiency is 65%. By using the R-32 chart provided.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Catalogue data for R-32 compressor with a displacement of 80 L/s show the capacity to be 8 tons when the suction conditions are 0.2 MPa and -20°C and condensing temperature is 50°C. The refrigerant leaves the condenser as saturated liquid. Calculate the actual volumetric efficiency and the brake work of the compressor if the compressor efficiency is 65%.

By using the R-32 chart provided.

 

Please help me! answering this problem. 

100
20
200
300
400
500
600
R-32
700
800
20.
(difuoromethane)
Reference state:
h = 200.0 kkg. 1.00 kkg K)
for saturated iquid at OC
10
700,
500
8
400
p= 200 kg/m
150
300
6
10.
cp
4
8
100
80
6
60
50
60
2
40
40
30
30
20
1
0.8
10
20
0.6
15
1
0.4
-10
10
0.8
8.0
0.6
0.2
30°C
0.4
%3D
4.0
40
3.0
0.1
0.2
0.08
-50
2,0
0.06
1.5
-60
0.1
0.04
1.0
0.08
0.80
0.06
3.10 kJ{kg•K),
3.20
0.60
0.02
0.04
0.40
0.30
0.01
0.02
0.20
100
200
300
Properties computed with: NIST REFPROP
400
500
600
0.01
800
version 7.0
ENTHALPY, kJ/kg
700
Based on formulation of Tiliner-Roth and Yokozeki (1997)
PRESSURE, MPa
0.40
:00C 08-
09'0--
--0.70
060-
00
1 30
F1.50-
81.60-
#1.70
:1.90
00-
140+
Transcribed Image Text:100 20 200 300 400 500 600 R-32 700 800 20. (difuoromethane) Reference state: h = 200.0 kkg. 1.00 kkg K) for saturated iquid at OC 10 700, 500 8 400 p= 200 kg/m 150 300 6 10. cp 4 8 100 80 6 60 50 60 2 40 40 30 30 20 1 0.8 10 20 0.6 15 1 0.4 -10 10 0.8 8.0 0.6 0.2 30°C 0.4 %3D 4.0 40 3.0 0.1 0.2 0.08 -50 2,0 0.06 1.5 -60 0.1 0.04 1.0 0.08 0.80 0.06 3.10 kJ{kg•K), 3.20 0.60 0.02 0.04 0.40 0.30 0.01 0.02 0.20 100 200 300 Properties computed with: NIST REFPROP 400 500 600 0.01 800 version 7.0 ENTHALPY, kJ/kg 700 Based on formulation of Tiliner-Roth and Yokozeki (1997) PRESSURE, MPa 0.40 :00C 08- 09'0-- --0.70 060- 00 1 30 F1.50- 81.60- #1.70 :1.90 00- 140+
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Catalogue data for R-32 compressor with a displacement of 80 L/s show the capacity to be 8 tons when the suction conditions are 0.2 MPa and -20°C and condensing temperature is 50°C. The refrigerant leaves the condenser as saturated liquid. Calculate the actual volumetric efficiency and the brake work of the compressor if the compressor efficiency is 65%.

100
20
200
300
400
500
600
R-32
700
800
20.
(difuoromethane)
Reference state:
h = 200.0 kkg. 1.00 kkg K)
for saturated iquid at OC
10
700,
500
8
400
p= 200 kg/m
150
300
6
10.
cp
4
8
100
80
6
60
50
60
2
40
40
30
30
20
1
0.8
10
20
0.6
15
1
0.4
-10
10
0.8
8.0
0.6
0.2
30°C
0.4
%3D
4.0
40
3.0
0.1
0.2
0.08
-50
2,0
0.06
1.5
-60
0.1
0.04
1.0
0.08
0.80
0.06
3.10 kJ{kg•K),
3.20
0.60
0.02
0.04
0.40
0.30
0.01
0.02
0.20
100
200
300
Properties computed with: NIST REFPROP
400
500
600
0.01
800
version 7.0
ENTHALPY, kJ/kg
700
Based on formulation of Tiliner-Roth and Yokozeki (1997)
PRESSURE, MPa
0.40
:00C 08-
09'0--
--0.70
060-
00
1 30
F1.50-
81.60-
#1.70
:1.90
00-
140+
Transcribed Image Text:100 20 200 300 400 500 600 R-32 700 800 20. (difuoromethane) Reference state: h = 200.0 kkg. 1.00 kkg K) for saturated iquid at OC 10 700, 500 8 400 p= 200 kg/m 150 300 6 10. cp 4 8 100 80 6 60 50 60 2 40 40 30 30 20 1 0.8 10 20 0.6 15 1 0.4 -10 10 0.8 8.0 0.6 0.2 30°C 0.4 %3D 4.0 40 3.0 0.1 0.2 0.08 -50 2,0 0.06 1.5 -60 0.1 0.04 1.0 0.08 0.80 0.06 3.10 kJ{kg•K), 3.20 0.60 0.02 0.04 0.40 0.30 0.01 0.02 0.20 100 200 300 Properties computed with: NIST REFPROP 400 500 600 0.01 800 version 7.0 ENTHALPY, kJ/kg 700 Based on formulation of Tiliner-Roth and Yokozeki (1997) PRESSURE, MPa 0.40 :00C 08- 09'0-- --0.70 060- 00 1 30 F1.50- 81.60- #1.70 :1.90 00- 140+
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