temperature of the environment from which the air is taken. It is assumed that the supply of additional fluxes of chemical enthalpy
in the form of additional fuel (E_ ng-cch) and (E_ ng-dch) is necessary only
in the system start-up period. The air enthalpy fluxes (E_ ang-cch, E_ ang-
dch) used for natural gas burning (supplied to the burners) depend on the temperature of the environment from which the air is taken and on the amount required for correct gas burning.
The energy fluxes carried away from the waste recycling system are shown on the right hand side of equation (1). The use of a re- covery boiler within the processing system allows the main energy flux carried away from the system to be the usable (effective) en-
ergy flux (E_ ue). Other fluxes of energy carried away from the system
are the total energy losses S(E_ el), consisting of the losses of heat
fluxes through the external walls of combustion chambers, after combustion chambers, concrete ducts and recovery boiler, as well as energy fluxes in the form of the physical and chemical enthalpy of ash.