Furnace Insulation Thickness Calculation

The wall of a furnace comprises three layers as shown in the figure.

Furnace insulation thickness calculation.

Recommended insulation thickness of heating systems like hot water low medium or high pressure steam systems. Calculate insulation thickness minimum value required for a pipe carrying steam at 180 0 c. Check list information required for the design of cold insulations information to be provided by client or contractor. Insulation thickness for a furnace wall.

A furnace wall consists of three layers. To calculate the insulation thickness sufficient to prevent condensation formation on the surface the fac tors given in table 1 must either be known be assumed or agreed with the operator of the installation. Thermal conductivity of perlite insulation temperature and k values. Recommended insulation thickness of heating systems like hot water low medium or high pressure steam systems.

I a layer of heat resistant or refractory brick ii a layer of insulating brick and iii a steel plate 0 25 in. 3 2sufficient thermal insulation thickness tm 6 c φ 65 td 22 8 c ta 30 c r flex st kalınlık 9 mm ts 23 6 c td 22 8 c thermal insulation material with a high µ value no condensation. Hence insulation thickness ri rp 0 2302 0 1524 0 0777. Insulation thickness 77 7 mm.

Very hot systems like hot water and steam systems should also be insulated to avoid potential personal. Thick for mechanical protection as shown in fig. The third layer is a plate of 6 35 mm thickness of steel thermal conductivity 45 w m k. The pipe size is 8 and the maximum allowable temperature of outer wall of insulation is 50 0 c.

Calculate overall heat transfer coefficients for walls or heat exchangers. Extra margin must be taken on insulation thickness as sometimes conducting heat transfer through insulation may become higher than convective heat transfer due to air on outside wall of insulation. The heat loss from steam per meter of pipe length has to be. General formula to calculate minimum insulation thickness required to prevent condensation t k r t1 t2 t3 t1 where t insulation thickness in k thermal conductivity r surface temperature resistance t1 dew point temperature.

Calculate the thickness of each layer of brick to give minimum total wall thickness if. This calculation determines the ideal thickness of water piping insulation for efficiently and economically preventing a heat transfer from outside to inside and keeping the water transported within cool it does not determine the thickness of insulation designed to keep condensate or other fluids from losing heat. The first layer is refractory whose maximum allowable temperature is 1400 o c while the second layer is insulation whose maximum allowable temperature is 1093 o c. To avoid heat loss and reduced system efficiency pipe work in heating systems should always be insulated.