In most cases, the heat losses of the thermal insulation are being covered. These losses are compensated by heating. The following relation serves for the calculation the heat loss of an insulated planar area:
where
Q – heat loss of the planar area for 1m2 [W/m2],
λ – thermal condictibility coefficient of the insulation [W/m.K],
d – insulation thickness [m],
tm – (desired) temperature of the medium inside [°C],
to – environment temperature [°C].
The calculation is processed for the whole cooled housing of the device. Heating though, is mostly generated only in the lower part, for example to the height of the minimal level. This is where all of the calculated capacity should be focused. With regard to the fact, that tanks, reservoirs and other technological devices have various ribs, stiffeners, input and output flanges, supporting constructions, it is necessary to multiply the previously calculated heat loss value by a constant in the range of 1.5 to 3, according to the actual version of the device.
