An ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff: 4. work of compressor in kj/kg 5. power of compressor in kj/kg 6. cooling coefficient of performance
An ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff: 4. work of compressor in kj/kg 5. power of compressor in kj/kg 6. cooling coefficient of performance
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
Related questions
Question
An ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff:
4. work of compressor in kj/kg
5. power of compressor in kj/kg
6. cooling coefficient of performance
Transcribed Image Text:APPENDIX 421
Table A-3 (continued)
Enthalpy,
kl/kg
Specific volume,
L/kg
Entropy,
ki/kg •K
4, "C
P, kPa
vg
hg
21
22
886.57
915.03
298.527
303.300
1480.48
1.34452
5.3626
1.6426
144.578
1481.18
1.36055
1.37654
5.3512
1.6466
140.214
23
944.18
308.081
1481.87
5.3399
1.6507
1.6547
136.006
131.950
24
974.03
312.870
1482.53
1.39250
5.3286
5.3175
5.3063
5.2953
25
1004.6
317.667
322.471
327.284
1483.18
1.40843
1.6588
128.037
1.6630
1.6672
26
1483.81
1.42433
1.44020
1035.9
124.261
27
1068.0
1484.42
120.619
117.103
28
1100.7
332.104
1485.01
1.45604
5.2843
1.6714
29
1134.3
336.933
1485.59
1.47185
5.2733
1.6757
113.708
30
31
32
1168.6
1-203.7
1239.6
1276.3
341.769
1486.14
1486.67
1487.18
1487.66
1.48762
5.2624
1.6800
110.430
107.263
104.205
101.248
98.3913
95.6290
92.9579
90.3743
346.614
1.50337
1.51908
1.53477
1.55042
1.56605
1.58165
1.59722
5.2516
5.2408
1.6844
351.466
1.6888
33
356.326
5.2300
1.6932
1.6977
34
35
36
37
1313.9
361.195
366.072
370.957
375.851
1488.13
1352.2
1391.5
1431.5
5.2193
5.2086
5.1980
5.1874
1.7023
1.7069
1488.57
1488.99
1489.39
1.7115
38
1472.4
380.754
1489.76
1.61276
5.1768
1.7162
1.7209
1.7257
1.7305
1.7354
87.8748
1.62828
1.64377
1.65924
1.67470
1.69013
1.70554
1.72095
1.73635
1.75174
39
40
1514.3
1557.0
1600.6
1645.1
385.666
390.587
395.519
400.462
1490.10
5.1663
5.1558
5.1453
5.1349
85.4561
83.1150
1490.42
1490.71
41
80.8484
42
1490.98
78.6536
1491.21
1491.41
1491.58
43
1690.6
405.416
5.1244
1.7404
76.5276
1737.0
1784.3
410.382
415.362
420.358
425.369
430.399
435.450
440.523
5.1140
5.1036
5.0932
5.0827
1.7454
74.4678
72.4716
70.5365
68.6602
66.8403
65.0746
44
45
1.7504
1.7555
1.7607
46
1832.6
1491.72
47
1881.9
1491.83
48
1932.2
1491.88
1.76714
5.0723
1.7659
1491.91
1.78255
1.79798
1.81343
1.82891
5.0618
5.0514
5.0409
5.0303
5.0198
5.0092
4.9985
1.7712
1.7766
49
1983.5
2035.9
2089.2
50
1491.89
63.3608
51
445.623
1491.83
1.7820
61.6971
52
2143.6
450.751
1491.73
60.0813
2199.1
2255.6
2313.2
1.7875
1.7931
1.7987
1.8044
53
455.913
1491.58
1.84445
58.5114
461.112
466.353
1491.38
1491.12
1.86004
1.87571
56.9855
55.5019
54
Transcribed Image Text:420 REFRIGERATION AND AIR CONDITIONING
Table A-3 Ammonia: properties of liquid and saturated vapor
Enthalpy,
Entropy.
kkg -K
Specific volume,
Lkg
PAPa
hf
by
v.
1373.19
1382.01
-69.5330
47.5062
-25.4342
-3.3020
18.9024
41.1883
-0.10909
0.00717
0.09264
0.19049
0.28651
0.38082
0.47351
051015
054655
0.58272
6.6592
6.5454
64382
6.3369
6.2410
-60
21.99
1.4010
14126
1.4245
4685.08
-55
-30
30.29
41.03
54.74
7201
93.49
3474.22
2616.51
1998.91
1390.64
45
40
1399.07
14367
1407.26
1415.20
142286
1425.84
1428.76
143164
1434.46
1437.23
1439.94
1442.60
1.4493
1.4623
1.4757
1547.36
-35
6.1501
1212.49
960.867
878.100
803.761
736.868
676.570
622.122
572.875
528.257
487.769
6.0636
6.0302
30
-28
-26
-24
-22
-20
-18
119.90
132.02
145.11
159.22
174.41
190.74
208.26
63.5629
72.5387
14811
81.5300
5.9974
14867
1.4923
90.5370
99.5600
108.599
117.656
126.729
135.820
5.9652
5.9336
5.9025
5.8720
58420
5.8125
5.7835
5.7550
5.7409
5.7269
5.7131
5.6993
5,6856
5.6721
5.6586
5.6453
5.6320
5.6189
5.6058
5.5929
5.5800
5.5672
5.5545
5.5419
5.5294
5.5170
5.5046
5.4924 16008
5.4802 1604S
5.4681
5.4561
5.4441
5.4322
0.61865
0.65436
0.68984
1.4980
1.5037
15096
15155
1.5215
1.5276
1.5338
1.5369
1.5400
15432
15464
1.5496
1.5528
1.5561
1.5594
1.5627
1.5660
1.5694
1.5727
1.5762
-16
227.04
0.72511
0.76016
0.79501
0.82965
0.84690
0.86410
0.88125
0.89835
0.91541
0.93242
0.94938
0.96630
0.98317
1.00000
L01679
1463.80 1L03354
1.05024
1.06691
1.08353
1.10012
L.11667
L.13317
L.14964
L16607
247.14
1445.20
147.74
1450.22
1451.44
1452.64
1453.83
1455.00
1456.15
1457.29
1458.42
1459.53
1460.62
1461.70
1462.76
-14
268.63
-12
-10
144.929
154.056
450.971
291.57
417.477
401.860
30360
316.02
328.84
342.07
355.71
369.77
384.26
399.20
414.58
430.43
158.628
163.204
167.785
172.371
176.962
181.559
186.161
190.768
195.381
-8
386.944
-7
372.692
359.071
346.046
-4
333.589
-3
-2
321.670
310.263
299.340
-1
200.000
204.625
209.256
213.892
218.535
278858
269.253
260.046
251.216
242.745
234.618
226817
219.326
212.132
205.221
198.580
192.196
186.058
180.154
174.475
169.009
163.748
158.683
153.804
149. 106
446.74
2
463.53
480.81
498.59
516.87
535.67
$55.00
574.87
146483
1465.84
4
15796
223.185
1466.84
15866
1.5901
227.841
232.503
237.172
241.848
246.531
251.221
255.918
260.622
265.334
270.053
274.779
279.513
284.255
289.005
293.762
1467.82
1468.78
1469.72
1470.64
1471.57
1472.46
1473.34
1474.20
1475.05
1475.8
1476.69
1477.48
1478.25
1479.01
1479.75
6
1.5936
1.5972
595.28
616.25
637.78
659.89
10
L.18246
12
13
14
L.19882
1.21515
16081
1618
2.59
705.8
729.79
754.31
123144
1.24769
1.26391
1.28010
1.29626:
131238
132847
16156
16193
16231
16269
16308
5.3855 L6347
16386
5.4204
14087
17
779.46
805.25
831.69
858.79
18
19
20
5.3740
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