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# 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 the oil in a storage tank or pipe line can be roughly estimated from the values below.

Heat Loss from Oil Filled Tanks and Pipe Lines
ApplicationTemperature difference between Oil and ambient Air
(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 calculated 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

An insulated exposed tank with outside area of 1000 ft2 contains oil at temperature 90oF. The surrounding temperature is 32oF. With temperature difference 68oF (90oF - 32oF) - the Heat Transfer Rate (α) from the table above is aprox. 0.4 Btu/hr ft2 oF.

The heat loss from the oil tank can be estimated to:

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

= 23200 Btu/hr

## Related Topics

• ### Heating Systems

Design of heating systems - capacities and design of boilers, pipelines, heat exchangers, expansion systems and more.

## Related Documents

• ### Content in Horizontal - or Sloped - Cylindrical Tanks or Pipes

Volume of partly filled horizontal or sloped cylindrical tanks or pipes - online calculator.
• ### Heat Loss from Open Water Tanks

Due to evaporation the heat loss from an open water tank like a swimming pool may be considerable.
• ### Oil Filled Tanks - Heat Loss

Heat loss from insulated and uninsulated, sheltered and exposed heated oil tanks.
• ### Oil Pipes - Head Loss

Head or pressure loss due to friction in oil pipes - various viscosity and laminar flow.
• ### Oil Pipes - Heat Loss

Heat loss in W/mK and Btu/hr ft degF from oil tubes ranging temperatures 10 - 38 degC (50 - 100 degF).
• ### Oil Pipes - Recommended Flow Velocities

Oil pipes flow velocities should be kept within certain limits.
• ### Pipes - Insulated Heat Loss Diagrams

Heat loss (W/m) from 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 10 to 80 mm and temperature differences 20 to 180 degC.
• ### Pipes - Insulated Heat Loss Diagrams

Heat loss (W/ft) diagrams for 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 0.5 to 4 inches and temperature differences 50 to 350 degF.
• ### Pipes Submerged in Oil or Fat - Heat Emission

Heat emission from steam or water heating pipes submerged in oil or fat - forced and natural circulation.
• ### Pipes Submerged in Water - Heat Emission

Heat emision from steam or water heating pipes submerged in water - assisted (forced) or natural circulation.
• ### Steam Tracing Pipe Lines

Steam tracing of pipe lines can be done to maintain appropriate product temperatures.

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## Citation

• The Engineering ToolBox (2003). Heat Loss from Oil Filled Tanks and Pipe Lines. [online] Available at: https://www.engineeringtoolbox.com/heat-loss-oil-tanks-d_285.html [Accessed Day Month Year].

Modify the access date according your visit.

8.21.8

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