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Design and Installation
October 2014
4-6
06-236115-001
Table 4-5. HFC-227ea Total Flooding Concentration Factors (W/V), Metric
Temp
a
(°C)
C
Specific
Vapor
Volume
(m
3
/kg)
d
Weight Requirements of Hazard Volume,
(kg/m
3
)
b
Design Concentrations (% by Volume)
e
6.25
6.70
7
8
9
10
11
12
13
14
15
0
0.1268
0.5258
0.5659
0.5936
0.6858
0.7800
0.8763
0.9748
1.0755
1.1785
1.2839
1.3918
5
0.1294
0.5152
0.5550
0.5816
0.6719
0.7642
0.8586
0.9550
1.0537
1.1546
1.2579
1.3636
10
0.1320
0.5051
0.5444
0.5700
0.6585
0.7490
0.8414
0.9360
1.0327
1.1316
1.2328
1.3364
15
0.1347
0.4949
0.5343
0.5589
0.6457
0.7344
0.8251
0.9178
1.0126
1.1096
1.2089
1.3105
20
0.1373
0.4856
0.5246
0.5483
0.6335
0.7205
0.8094
0.9004
0.9934
1.0886
1.1859
1.2856
25
0.1399
0.4765
0.5151
0.5382
0.6217
0.7071
0.7944
0.8837
0.9750
1.0684
1.1640
1.2618
30
0.1425
0.4678
0.5061
0.5284
0.6104
0.6943
0.7800
0.8676
0.9573
1.0490
1.1428
1.2388
35
0.1450
0.4598
0.4973
0.5190
0.5996
0.6819
0.7661
0.8522
0.9402
1.0303
1.1224
1.2168
40
0.1476
0.4517
0.4888
0.5099
0.5891
0.6701
0.7528
0.8374
0.9230
1.0124
1.1029
1.1956
45
0.1502
0.4439
0.4807
0.5012
0.5790
0.6586
0.7399
0.8230
0.9000
0.9950
1.0840
1.1751
50
0.1527
0.4366
0.4728
0.4929
0.5694
0.6476
0.7276
0.8093
0.8929
0.9784
1.0660
1.1555
55
0.1553
0.4293
0.4651
0.4847
0.5600
0.6369
0.7156
0.7960
0.8782
0.9623
1.0484
1.1365
60
0.1578
0.4225
0.4577
0.4770
0.5510
0.6267
0.7041
0.7821
0.8410
0.9469
1.0316
1.1183
65
0.1604
0.4156
0.4505
0.4694
0.5412
0.6167
0.6929
0.7707
0.8504
0.9318
1.0152
1.1005
70
0.1629
0.4092
0.4436
0.4621
0.5338
0.6072
0.6821
0.7588
0.8371
0.9173
0.9994
1.0834
75
0.1654
0.4031
0.4368
0.4550
0.5257
0.5979
0.6717
0.7471
0.8243
0.9033
0.9841
1.0668
80
0.1679
0.3971
0.4303
0.4482
0.5178
0.5890
0.6617
0.7360
0.8120
0.8898
0.9694
1.0509
85
0.1704
0.3912
0.4239
0.4416
0.5102
0.5803
0.6519
0.7251
0.800
0.8767
0.9551
1.0354
90
0.1730
0.3854
0.4178
0.4351
0.5027
0.5717
0.6423
0.7145
0.7883
0.8638
0.9411
1.0202
a The minimum design temperature in the flooded space.
b
[agent weight requirements (
kg/m
3
)] = Kilograms of agent required per cubic meter of protected volume
to produce indicated concentration at the temperature specified.
c [temperature (°C)] = The design temperature in the hazard area.
d [specific volume
(m
3
/kg)
] = Specific volume of superheated HFC-227ea vapor can be approximated by the formula:
where = temperature (°C)
e
[concentration (%)] = Volumetric concentration of HFC-227ea in air at the temperature indicated.
t
s
W V
W V
W
V s
c
100
c
–
=
t
s
s
0.1269
0.0005
t
+
=
t
C
Summary of Contents for ECS
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