The total heat loss from an application can be calculated as:
Q = α A dt (1)
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)
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
Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more.
Volume of partly filled horizontal or sloped cylindrical tanks or pipes - online calculator.
Due to evaporation the heat loss from an open water tank like a swimming pool may be considerable.
Heat loss from insulated and uninsulated, sheltered and exposed heated oil tanks.
Head or pressure loss due to friction in oil pipes - various viscosity and laminar flow.
Heat loss in W/mK and Btu/hr ft degF from oil tubes ranging temperatures 10 - 38 degC (50 - 100 degF).
Oil pipes flow velocities should be kept within certain limits.
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.
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.
Heat emission from steam or water heating pipes submerged in oil or fat - forced and natural circulation.
Heat emision from steam or water heating pipes submerged in water - assisted (forced) or natural circulation.
Steam tracing of pipe lines can be done to maintain appropriate product temperatures.
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