Kvasny Prum. 1978; 24(8): 172-175 | DOI: 10.18832/kp1978029

Calculating Heat and Air Consumption in Malt Drying Kilns Using Combustion.Peer-reviewed article

T. LEJSEK

To calculate heat and air consumption in a malt drying kiln, using combustion products of natural gas, it is necessary to know the enthalpy and specific humidity of combustion products. If these two data are available, it is easy to determine consumption froom a i-x diagram of humid air. Sometimes it may be difficult to specify the state of the air + combustion products mixture because of insufficient range of the available i-x diagram. In such a case the solution is obtainable from two equations - the equation of the isotherm and the equation of the straight line connecting points determining the state of combustion products and air. From an example covering two temperatures, viz.80°C and85°C, it can be seen, that theretical air consumption in a klin using natural gas is by 2-3 % higher than in an ideal drying kiln with indirect air heating. The figures for higher heat consumption are 14-15%.The difference is due to the presence of water vapour in the combustion products. For reliable comparison of various heating methods the efficiency of indirect heat transfer must be taken into account.
(In Czech, English summary only)

Keywords: kilning, malt, consumption, heat, air

Published: August 1, 1978