Strategic Research and Innovation Agenda for Renewable ... - EGEC

RenewableHeating & CoolingEuropean Technology PlatformImproved insulation, tightness and, in general construction in new houses is going tolead to a very significant reduction of the thermal load in winter and probably to the need forhigher ventilation or even some air conditioning in summer since the internal heat loads inthe house tend to continuously increase. Ventilation systems will mostly incorporate heatrecovery heat exchanger in order to decrease the thermal load due to ventilation.On the other side, Europe’s building stock still consists of a large number of inadequatelyinsulated houses that lose a lot of heat. Ideally, these buildings should be insulated andold radiators should be replaced by low-temperature heat distribution systems to enablea heat pump to generate heating and domestic hot water to be installed. The outcome wouldbe a meaningful saving on energy consumption and emissions.However, a short term solution is represented by the combination of a heat pump with theexisting system, in order to raise the temperature of water before it is further increased bythe existing boiler. This application of HPs requires only a small HP, keeping investment andinstallation costs low. In such an installation, the HP will cover most of the annual heatingdemand only being supported by the existing boiler at low ambient temperatures (winter) orto cover peaks in demand. Primary energy savings along the year are going to be still high.The heat pump will be the only heat generator at outside air temperatures above 2°C (whichis the case in most of Europe). Specific research efforts are needed in order to develop “integrationkits” enabling the installer to easily and quickly integrate the new technology intothe existing system. Smart controls will have to integrate the additional (fossil) heaters atdays below 2°C and for peak demand in hot water production. Thus, high sCOP of the integratedsystem will be reached while satisfying the necessary comfort.As hybridisation implies interaction between complementary technologies, researchon the control and automation strategies is a top priority for hybrid systems to reachtheir full potential. Further technological developments are required to expand therange of cost-effective hybrid system applications in buildings.The following research priorities for heat pump technology and hybrid systems are deemedto bring about significant benefits by 2020:CCT.1ObjectiveState-of-the-artCost-competitive heat pump kit for houses with existing boilerDevelopment of heat pump kit to be integrated in the heating system of houses with existingnon-electrical boiler. The expected solution should present the following characteristics:• High efficiency air to water heat pump producing heating water with a temperature liftof minimum 45K.• The supply temperature should be changeable between 50 and 35 ºC depending on theambient temperature.• The existing boiler will be kept and will only be employed as a back-up system underextreme ambient conditions when the heat pump is not able to attain 60ºC or to increasethe temperature of the sanitary hot water.• Compact design in a form of kit with all the necessary components for an easy integrationand installation with the boiler heating system.• The control of the system must allow optimal management and automatic operation of theheat pump unit and boiler• With a capacity in the range 4-8 kW, the system should be able to provide the requiredheat most of the time.Expensive hybrid systems have been developed in recent years, leading to efficient heatingand sanitary water production.The proposed kit will not attain such an efficient operation but will help to save energy andreduce gas consumption at a competitive installation and system cost.Targets25% decrease in the cost of the heat pump, including installation.The sCOP of the heat pump operating under the described conditions should reach at least avalue of 4.Type of activity100% Development35