LAUSR

In order to enhance efficiency of thermal energy supply in residential buildings, combined heat and power (short: CHP) systems are more and more replacing conventional heating systems. However, heat-controlled CHP systems either generate an excess of electrical energy, which is commonly fed into the power grid, or suffer from a lack of electrical energy, which has to be covered from the grid. In order to increase self-sufficiency and self-consumption, electrical energy storage should be integrated into a heat-controlled CHP system. Therefore, an electrical storage based on a Liquid Organic Hydrogen Carrier (LOHC) is investigated in this work. For this purpose a heat-controlled CHP system coupled with an LOHC system is modelled and simulated. The CHP system and the LOHC system were evaluated concerning key figures like self-sufficiency, self-consumption rate and primary energy demand. Moreover, a comparison between an LOHC system and a battery system was done. Both systems showed that with an additional electrical energy storage system the primary energy demand can be significantly decreased and the self-sufficiency and the self-consumption rate can be improved. Best results concerning electrical self-sufficiency could be achieved using a battery.