Experimental evaluation of a high-efficiency surface combustor-heater concept with low pollutant emissions

In a surface combustor-heater being developed by the Institute of Gas Technology (IGT), heat-exchange surfaces are embedded in a stationary bed (porous matrix) of refractory material where gaseous fuel is burned. The overall heat-transfer rate from the combustion products to the embedded heat-exchange surfaces can be significantly enhanced. Also, by removing heat simultaneously with the combustion process, NO{sub x} formation can be significantly reduced. To prove this concept, the bench-scale surface combustor-heater has been tested. Preliminary experimental results are discussed. 3 refs., 10 figs.