ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
RADIANT TRANSFER IN GAS FILLED ENCLOSURES BY RADIANT ENERGY ABSORPTION DISTRIBUTION METHOD
Sinopsis
A radiant heat ray method is employed to determine the radiant energy absorption distribution in a nonisothermal enclosure filled with nonisothermal gas. This method eliminates the complexity of the zoning method in calculating the surface-surface, gas-gas and gas-surface direct exchange areas. It can also deal with the nonuniformity of the gas absorption coefficient and wall emissivity. A study on radiation in a cylindrical enclosure reveals that the radiant heat less computation time and yields more accurate results than the Monte Carlo method in determining the absorption distribution.
A combined method is developed which utilizes the absorption distribution as the data base for predicting the distri-butions of temperature and heat flux within an enclosure. The applications of this method are demonstrated by two systems: a continuous heating furnace and a marine boiler furnace. Theory is in good agreement with the field tests. The ultimate goal of the absorption method is to diagnose the enclosure radiation characteristics to find a means for homogenizing the surface heat transfer.
A combined method is developed which utilizes the absorption distribution as the data base for predicting the distri-butions of temperature and heat flux within an enclosure. The applications of this method are demonstrated by two systems: a continuous heating furnace and a marine boiler furnace. Theory is in good agreement with the field tests. The ultimate goal of the absorption method is to diagnose the enclosure radiation characteristics to find a means for homogenizing the surface heat transfer.