Experimental development of electric heat pumps in the Greater Copenhagen DH system - Phase 2

The aim of the project is to accelerate the use of large electric heat pumps for district heating through industrial cooperation, research and experimental development. This is the second phase of a total project. It shall demonstrate optimal design, smart system integration, cost efficiency and climate benefits.

Large heatpumps (HPs) face a number of barriers preventing large-scale introduction. One is the feasibility of the investments – in particular in areas with low alternative heat costs as in Greater Copenhagen Area (GCA). Also lack of knowledge and operation experiences, especially use of natural refrigerants (required by Danish law) and supplying heat above 70 degrees, are important. This project addresses the main barriers in order to accelerate the use of HPs for system integration with improved cost efficiency and with potential for scaling up concepts to 50-100 MW. The overall project consists of three phases. The purpose of the present Phase 2 project is to develop and demonstrate two electric 5 MW HPs based on:

• Geothermal heat (located at existing well at Amager power station)

• Sea water and waste water

The GCA DH companies are facing investment decisions in geothermal energy of 200 million Euros. As geothermal wells hold high technical and financial risks, it is important to also test other heat sources. The project involves front players from the full value chain, ensuring a high level of competencies and commitment to commercializing the technology.