PhD Thesis - Energy Systems Research Unit - University of Strathclyde

micro-trigeneration system are those described by Dorer and Weber in their research[9]. Specifically these were the:supplied thermal energy (space heating, space cooling and DHW supply);electrical performance of the system (the net import, the net export and thenet demand satisfied by micro-trigeneration system);micro-trigeneration system performance (fuel consumption, primary energyconsumption and system efficiency); and thesystem’s primary energy savings (PES).Additionally, in this research the energetic analysis was broadened to include also theoperational details of the CHP unit and the absorption chiller.4.2.1.1 Supplied thermal energyThe total thermal energy supplied by the micro-trigeneration system includes theenergy supplied to provide space heating, the energy supplied to provide spacecooling and the energy supplied to heat water.To calculate the energy supplied for space heating, E SH in kWh, consider a period oftime N minutes long during which space heating was being supplied to the individualzones inside the building. Assuming no substantial heat losses in the ventilation ducts,the space heating energy supplied during this time period can be assumed to be thetotal energy transferred from the hot water flowing in the 3 heating coils (HC) to theair flowing across the ventilation system, as defined in equation (4.1).- (4.1)Similarly, equation (4.2) defines E SC , the energy supplied for space cooling in kWh,146