Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

MENDELNET 2013input storage, sorted material withoutthe need of hygienisationinput materialInput mixture mixingShredding, cuttingHygienisation lineAdditional heat sourceMain reactorPic. 1 Block scheme of the device/facilityENERGY BALANCE OF THE TECHNOLOGYShape treatmentThe main parameter of feasibility of whole development project and following successful operationis the detailed review of energy balance of whole system and then strict observance of positiveenergy balance in all phases of development. In the technology there is crucial to abide the defaultassumption that the price of additional heat added to the system for final dehumidification andsupporting processes must be lower than the price of input material waste disposal fees (paid by thecustomer).The basic shape of the energy balance is following:E mat + E sup + E add + E ferm = E mat.d. + E H2O + E los , where [1]E matE supE addE fermE mat.d.E H20E los[GJ] ... internal energy of humid material (input; GCV)[GJ] ... supporting energy – manipulation, instrumentation and control etc.[GJ] ... additional energy – heating, dehumidification[GJ] ... energy of thermophillicfermentation (mean surplus of energy brought byfermentation process to original material “internal” energy)[GJ] ... internal energy of dry material (output; GCV)... energy needed for evaporation of water from material... energy losses of heat exchangers, surroundings, convection and conduction of heat818 | P age