Thermal balance on waste-to-energy combustion heat value in the fuel The heat input To To o water entering the water-wall pipes stack steam vaporization gases heat in the stack gases From water To the latent heat of water Black box radiation From The output the heat in the ashes fuel the heat in the steam To the heat lost due to radiation ash UNEPBlack box heat value in the fuel water entering the water-wall pipes heat in the stack gases the latent heat of water the heat in the ashes the heat in the steam the heat lost due to radiation The heat input The output Thermal balance on waste-to-energy combustion