Enter the fraction of the total main space and water heat derived from CHP thermal output under the ‘Space and water heating: heat source’ tabs.
DEAP calculates the total main space heating demand as the value ‘Annual space heating requirement’ shown on the ‘Results’ tab minus the percentage of heat from secondary/supplementary system.
The total main water heating demand is the value ‘Output from main water heater’ shown on the ‘Results’ tab.
The ‘Heat source’ section of the ‘Space heating’ tab allows the user to enter the thermal efficiency (CHP Hη) and electrical efficiency (CHP Eη) for the installed CHP unit as well as the fuel used in the CHP unit.
DEAP calculates the total energy delivered to the CHP unit based on the CHP thermal output and the CHP thermal efficiency. DEAP calculates the total electrical energy generated by the CHP unit based on energy delivered to the CHP unit and the CHP electrical efficiency.