Colloquium announcement

Faculty of Engineering Technology

Department Thermal Engineering
Master programme Sustainable Energy Technology

As part of his / her masterassignment

Axl Hofstede

will hold a speech entitled:

Assessing the implementation potential of the magnetocaloric heat pump for space heating in residential real estate



Heat pump technology has become an increasingly popular method to eliminate natural gas use for real estate space heating, decreasing the energy use of the built environment as a whole. Nowadays, heat pumps are based on vapour compression technology, which requires the use of hazardous refrigerants. The magnetocaloric (MC) heat pump is a promising alternative. Magnetocaloric material (MCM) shows a temperature change under influence of a fluctuating magnetic field. This temperature change is relatively small, but large temperature spans can be reached by applying the MCM in an Active Magnetic Regenerator (AMR).

As for any other novel Energy Technique or Measure (ETM), implementation is a challenge. The implementation potential of an ETM for residential building projects can be assessed by determining the impact of the ETM on the energy performance of the dwelling, the financial impact and the role of the stakeholders involved. This study aims to assess the implementation potential of the MC heat pump for space heating of a detached house located in the Netherlands, with a radiant floor heating system and a vertical ground heat exchanger as heat source.

The detached house has been simulated for four different scenarios varying in energy performance of the dwelling to determine the thermal load on the heat pump. The Coefficient of Performance (COP) of the MC heat pump has been determined based on the Carnot efficiency, motor losses and hydraulic losses over the AMR. The energy performance of the dwelling has an impact on the annual energy use of the dwelling, but also on the installed capacity of the heat pump and the temperature span which needs to be achieved by the heat pump.

The investment costs involved with the MC heat pump have been defined by determining the installed capacity, material needed and auxiliary equipment. Operational costs have been determined based on annual heating demand per scenario and the COP of the heat pump. Also the effect of an additional electric element covering peak loads in the heating demand to decrease installed capacity has been studied.