Oil Filled Tanks - Heat Loss
Heat loss from insulated and uninsulated, sheltered and exposed heated oil tanks.
Heat transfer rates - α - for heated oil filled tanks.
Sheltered Tank
| Tank Temperature | Heat Transfer Rate - α - | ||||
|---|---|---|---|---|---|
| Uninsulated | Insulated | ||||
| (oC) | (oF) | (W/(m2 oC)) | (Btu/(hr ft2 oF)) | (W/(m2 oC)) | (Btu/(hr ft2 oF)) |
| 10 | 50 | 6.8 | 1.2 | 1.7 | 0.3 |
| 27 | 80 | 7.4 | 1.3 | 1.8 | 0.33 |
| 38 | 100 | 8.0 | 1.4 | 2.0 | 0.35 |
Exposed Tank
| Tank Temperature | Heat Transfer Rate - α - | ||||
|---|---|---|---|---|---|
| Uninsulated | Insulated | ||||
| (oC) | (oF) | (W/(m2 oC)) | (Btu/(hr ft2 oF)) | (W/(m2 oC)) | (Btu/(hr ft2 oF)) |
| 10 | 50 | 8.0 | 1.4 | 2.0 | 0.35 |
| 27 | 80 | 8.5 | 1.5 | 2.1 | 0.38 |
| 38 | 100 | 9.0 | 1.6 | 2.3 | 0.4 |
Heat loss transfer rate depends heavily on
- the ambient conditions - whether it is wind, sun or raining or snowing on the external surface
- the internal conditions in the tank - the viscosity of the oil and the internal circulation in the tank
The total heat loss from an application can in general (in SI-units) be expressed as:
Q = α A dt (1)
where
Q = heat loss (W)
α = heat transfer rate (W/(m2oC))
A = area (m2)
dt = temperature difference (oC)
Example - Heat Loss from an Exposed Insulated Oil Tank
The total heat loss from an insulated tank with 1000 m2 exposed surface, filled with heated oil at 38oC, surrounding temperature of 0oC and a heat transfer rate of 2.27 W/m2 oC - can be calculated as:
Q = (2.27 W/(m2oC)) (1000 m2) ((38 oC) - (0 oC))
= 86260 W
= 86.3 kW
Related Topics
-
Heating Systems
Design of heating systems - capacities and design of boilers, pipelines, heat exchangers, expansion systems and more. -
Insulation and Heat Loss from Steam and Condesate Pipe Lines
Heat loss from uninsulated and insulated steam and condensate pipes and tanks. Calculate insulation thicknesses. -
Steam and Condensate
Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration 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. -
Fuel Oil Storage Tanks
Fuel oil storage tanks dimensions. -
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 Open Water Tanks
Due to evaporation the heat loss from an open water tank like a swimming pool may be considerable. -
ISO Grade Oils - Viscosities and Densities
Viscosities and densities of ISO - and equivalent SAE grade oils. -
Oil Tanks - Heat Loss
Heat loss from lagged and unlagged, sheltered and exposed oil tanks. -
Pipes - Bare Surface Heat Loss
Heat loss vs. surface temperature. -
Pipes - Insulated Heat Loss Diagrams
Heat loss (W/m) from 1/2 to 6 inches insulated pipes - 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 pipes - ranging insulation thickness 0.5 to 4 inches and temperature differences 50 to 350 degF. -
Pipes and Cylinders - Conductive Heat Losses
Conductive heat losses through cylinder or pipe walls. -
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. -
Rectangular Tanks - Volumes
Tank volume per foot depth. -
Submerged Coils - Heat Transfer Coefficients
Heat transfer coefficients for steam and hot water coils submerged in oil tanks.
