Absolute calorific value,19,410 kJ/kg 19 18 17 The picture shows that even at (2000F) reasonable residence times and 1090℃ temperatures a significant fraction of 1750E)合 the fuel is unburned 950C4 5ec0(1500E)● 14 680℃○ (1250E 0 ▲1090°C 13 △950C ●815C O680C 12 0 10 152025 30 Time in furnace,min D 90 UNEP
The picture shows that even at reasonable residence times and temperatures a significant fraction of the fuel is unburned
Materials and Thermal Balance Combustion air (HC)+CO+H,O+nutrients heat energy UNEP
Materials and Thermal Balance Combustion air
A Power Plant--Efficiency materials can be studied in their steady-state condition energy systems also can be in steady state no change occurring over time. if some of the energy out is useful and the rest is wasted rate of energy IN =rate of energy USED +rate of energy WASTED E=energy USED ×100 energy IN UNEP
rate of energy IN =rate of energy USED +rate of energy WASTED if some of the energy out is useful and the rest is wasted A Power Plant- -Efficiency materials can be studied in their steady-state condition no change occurring over time energy systems also can be in steady state
From thermodynamics Efficiency is determined by the absolute temperature of the surroundings E,(%1=0×100 T where Ec=Carnot efficiency,% T1 =absolute temperature of the boiler,K=C +273 T0=absolute temperature of the condenser(cooling water),K Since this is the best possible situation,any real-world system must be less efficient,or EsE UNEP
From thermodynamics Efficiency is determined by the absolute temperature of the surroundings where Ec =Carnot efficiency, % T1 =absolute temperature of the boiler, ºK =ºC +273 T0 = absolute temperature of the condenser (cooling water), ºK Since this is the best possible situation, any real-world system must be less efficient，or
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 UNEP
Black 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