Possibility of Heat Pump Use in Hot Water Supply Systems

The problem of modernization of the heat module (HM) with two-stage mixing scheme connection of hot water supply (HWS) by installations of the heat pump (HP) during interheating period is considered. Heating water of the in-house circuit of the building heating system is used as heat source for HP. The district cooling of the residential areas is possible through heaters during summer. R600 refrigerant is chosen for HP as a most environmentally freindly and as one that has low-pressure evaporation and condensation. The economic calculation is made for interheating period with and without HP. This paper advanes selection of optimum amount heat to be recovered during low potential heat utilisation and targets for heating and cooling capacities. Almost all residential buildings connected to the district heating and that have heat module with two-stage mixing scheme HWS system have market potential. Climatic conditions for such modernization are quite broad and include virtually all residential buildings in Europe. Primary energy consumption is taking place during daytime, when the cost is high. And so promising direction of development of the proposed approach to use HP in the in the heating system with hot water supply tanks, which charged at night. The results of this work may be used for in Total Site methodology development allowing heat recovery for district heating needs of both new designs and as retrofits to existing sites to ensure fast, widespread and cost-efficient industrial deployment. It leads to carbon footprint reduction and energy efficiency improvement of regions with heating and cooling demands during winter and summer seasons.