Heat Loss from Oil filled Tanks and Pipe Lines

Heat loss from insulated and non insulated sheltered and exposed oil tanks and pipes

Heat loss from oil in storage tanks and pipe lines:

ApplicationTemperature of Oil
(oF)
Heat Transfer Rate - α - (Btu/(hr ft2 oF))
Without InsulationInsulated
Sheltered tanks  - 50 1.2 0.3
50 - 80 1.3 0.33
80 - 100 1.4 0.35
Exposed tanks  - 50 1.4 0.35
50 - 80 1.5 0.38
80 - 100 1.6 0.4
Tank in Pit All Temperatures 1.2 -
Sheltered Pipe Line  - 80 1.5 0.4
80 - 260 2.3 0.58
Exposed Pipe Line  - 80 1.8 0.45
80 - 260 2.75 0.7
  • 1 Btu/(hr ft2 oF) = 5.678 W/(m2 oC) = 4.882 kcal/(h m2 oC)
  • T(oC) = 5/9[T(oF) - 32]

The total heat loss from an application can be expressed as:

Q = α A dt                                             (1)

where

Q = heat loss (W, Btu/hr)

α = heat transfer rate (W/(m2 oC), Btu/hr ft2 oF)

A = area (m2, ft2)

dt = temperature difference (oC, oF)

Example - Heat loss from an insulated exposed tank

For an insulated exposed tank with outside area of 1000 ft2, containing oil at 90oF and a surrounding temperature at 32oF, the Heat Transfer Rate - α - from the table is 0.4 Btu/hr ft2 oF.

The heat loss can be calculated as:

Q = (0.4 Btu/hr ft2 oF) (1000 ft2) ((90 oF) - (32 oF))

    = 23200 Btu/hr

Related Topics

  • Heating - Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more

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