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ANNEX 50 HEAT PUMPS IN MULTI-FAMILY BUIL- DINGS FOR SPACE HEATING AND DHW Introduction The building sector plays a significant role for the energy consumption in all countries. Apart from the power ge- neration and transportation sectors it is the most im- portant sector regarding emission of greenhouse gases. Accordingly, the radical reduction of CO2 emissions from buildings is crucial for achieving climate neutrality. Applying heat pump technologies and renewable energy is more complex for multifamily buildings than for newly built apartments, since multifamily houses have a range of special heat demand characteristics. Firstly, the share of domestic hot water demand of the overall heat de- mand varies with varying building standards as well as with different climates. Secondly, the temperature level of the heating system is influenced by these aspects as well as by the installed heat transfer system. Thus, dea- ling with the variety of heat demand characteristics is a challenge on the way to a broader dissemination of heat pumps in multifamily buildings. Thus, Annex 50 will focus on solutions for multifamily houses with the attempt to identify barriers for heat pumps on these markets and how to overcome them. According to the demands of the participating countries, both new buildings and retrofit will be considered, as well as buildings with higher specific heating demands. As the end user on the demand side, city councils and housing corporations owning large housing estates are important target groups. On the supply side, heat pump manufacturers, power companies, technical consultants HPT TCP ANNEXES as well as planners/installers will be addressed. Further- more, political decision makers are of interest since go- vernments setting the boundary conditions for future development for Energy Zero in 2050. Objectives » Enhancement of HP systems and/or HP components for their adaptation in multi-family buildings; » Development and demonstration of concepts for application of HP in energetically renovated buildings and in buildings without improved building envelope; » Finding the optimal bivalence temperature for bivalent or hybrid systems; » Identification of needs on the characteristics of HP components and figuring out, which are neither fulfil- led by market available products nor a scope in ong- oing research and development projects; » Present recommendations for the optimal (multi) heat source and operating mode (fuel driven, electric driven, hybrid) solutions depending on building type and ecologic-economic situation and climatic zone. Progress Success Stories: 1. In order to consider the heating demand, take va- riables such as the occupants’ behaviour, the type of heat pump and the structure of the building need to be considered. Thus, Annex 50 has developed a ‘system- matrix tool’, Figure 1. This system matrix divides the consideration of a multi-family building into three steps. First, a division is made into one of the seven schemes that describe the type and use of the heat pump in gene- ral, Figure 2. This is followed by an analysis with a more detailed description of the heat pump and an assess- ment with pro and contra arguments of each solution. In the last step, a fact sheet will be published, describing a real-use case with all relevant information, such as a Fig. 1: Thanks to the new Matrix tool, it is now possible to structure multi-family buildings with installed heat pumps. This enables even more meaningful forecasts to be made about the development of the heat pump in the housing market. VOL.38 NO 1/2020 HPT MAGAZINE 13PDF Image | Integration of Heat Pumps into the Future Energy
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