Steam Pipes - Heat Loss over a Year

Yearly heat loss in amount of coal or oil consumption for insulated and uninsulated steam pipes at different dimensions and operation times

Yearly heat loss per meter pipe line is estimated for steam pipes with pressure 6.5 bar (7.5 bar abs, 168oC) and surrounding air temperature 20 oC.

Increasing the steam pressure increases the temperature and influences energy consumption and heat loss.

Pipe dimension
(mm)
Heat Loss
(W/m)
Production time
(hours)
Fuel Consumption
Coal (kg/m) Oil (kg/m)
UninsulatedInsulatedUninsulatedInsulated
25 313 2000 119 30 59 15
6000 357 89 178 45
8400 505 126 253 64
32 430 2000 166 42 82 21
6000 500 125 265 62
8400 699 174 349 88
50 529 2000 202 50 101 25
6000 607 152 303 76
8400 755 189 378 92
80 748 2000 297 74 149 37
6000 892 223 446 111
8400 1249 312 625 156
100 940 2000 327 82 164 42
6000 981 245 491 131
8400 1517 379 758 190

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