Rotary magnetic chillers with permanent magnets

In this article a technical–economic analysis of rotary magnetic liquid chillers is presented. The technical part comprises studies on different magnetocaloric regenerator geometries and different operating parameters. The results are presented by correlations of the Coefficient of Performance (COP) and the cooling capacity of a magnetic chiller. The analysis is based on applications with two different working fluids. The results reveal that magnetic chillers can be more efficient than conventional compressor-based chillers. However, the investment costs for magnetic chillers are higher. A discussion on the cost break-down and possible cost reductions is outlined. Some ideas for future R&D in the field of magnetic refrigeration are given.