Related Resources: heat transfer

Heat Loss from Bare Copper Tube

Heat Transfer

Heat Loss from Bare Copper Tube to Still Air at 80°F, Btu/h· ft

Also See:

Pipe Size,
in
Pipe Inside Temperature, °F
120
150
180
210
240
3/8
10.6
20.6
31.9
44.2
57.5
1/2
12.7
24.7
38.2
53.1
69.2
3/4
16.7
32.7
50.7
70.4
91.9
1
20.7
40.5
62.9
87.5
114
1 1/4
24.6
48.3
74.9
104
136
1 1/2
28.5
55.9
86.9
121
158
2
36.1
71.0
110
154
201
2 1/2
43.7
86.0
134
187
244
3
51.2
101
157
219
287
3 1/2
58.7
116
180
251
329
4
66.1
130
203
283
371
5
80.9
159
248
347
454
6
95.6
188
294
410
538
8
125
246
383
536
703
10
154
303
473
661
867
12
183
360
562
786
1031

Conversion

Qty
Reference
Unit
is
equal
to
Conversion
Factor
Unit
1
BTU/hour square foot °F
=
1
BTU/hour square foot °F
1
=
0.000135622991
calorie/second square centimeter °C
1
=
1
CHU/hour square foot °C
1
=
5.678263398
joule/second square meter K
1
=
0.45359237
kilocalorie/hour square foot °C
1
=
4.88242768
kilocalorie/hour square meter °C
1
=
5.678263398
watt/square meter K
1
=
5.678263398
watt/square meter °C

Conversion of units

Qty Unit is
equal
to 		Conversion
Factor 		Reference
Unit
1 BTU/hour square foot °F = 1 BTU/hour square foot °F
1 calorie/second square centimeter °C = 7373.3810965421
1 CHU/hour square foot °C = 1
1 joule/second square meter K = 0.17611018191798
1 kilocalorie/hour square foot °C = 2.2046226007073
1 kilocalorie/hour square meter °C = 0.20481614157061
1 watt/square meter K = 0.17611018191798
1 watt/square meter °C = 0.17611018191798

Related:

Reference:

  • ASHRAE Fundamental Handbook, 2019

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