Waste heat is found in the conservation of energy equation for a heat engine. Q H = Q L + W. Where. Q H is the input heat to the system from a given fuel W is the useful mechanical work attained from the system and. Q L is the waste heat.
Heat Calorific Value Estimation Municipal Solid Waste ...
Thus the waste fuel feedstock requirement is larger by the moisture content percentage e.g. 50% moisture means that the feedstock is doubled compared to 0% moisture content fuel defined by such terms as Higher Heating Value (HHV) or Gross Calorific Value (GCV).
Waste Heat Recovery Calculations | Heat Recovery Unit ...
However waste heat recovery units have a payback period of around one to one and a half years. Therefore when considering a waste heat recovery system it should be calculated how much energy costs can be saved. To calculate the potential savings different factors must be considered. The following text describes the most important factors for calculating the heat energy costs that can be saved through a waste heat recovery
Waste Heat Boiler - an overview | ScienceDirect Topics
The heat in the steam produced is about 95% of that lost by the gases passing through the boiler. Heat lost by hot gases = V s ( t 1 t 2) MJs 1 where V = m 3 gas/sec s = specific heat (volume basis). Heat absorbed by water = 0.95 Vs ( t1 t2 )MJ s 1 t1 and t2 = temperature of
WHB 04/07/2021 02:49:07 942f917a5a68029e7a9df1c128cd2b577546dbc8.xls sz WASTE HEAT BOILER CALCULATION (GANAPATHY) 3.4328358 FLUE GAS 473.43284 TEMP IN 900 C 200.28284 1652 F 1300 392.5091 TEMP OUT 300 C 572 F 474 Average temp 1112 F FLOW RATE 1172.00 Lb/hr 100000 2957.00 Kg/hr Cp gas at average temp 0.30 Btu/lb F 0.283 Boiler thermal capacity 372212.83 Btu/hr
Waste heat recovery calculator. Even though rejected heat from a number of industrial processes is called waste heat it often contains large amount of exergy and could be efficiently reused through one of the many waste heat recovery technologies. This simple web-calculator may be applied to analyse four most common waste heat recovery technologies from both technical and economic perspective.