Magnetic cycles for heat pumping and power generation

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The objective of the research program is the development of energy conversion devices using magnetic cycles. Magnetocaloric devices are reversible heat engines utilizing magnetic ordering to effect work and heat transfer. They can be used for refrigeration, heat pumping, and to generate power. The potential for increased efficiency comes from highly reversible work transfer coupled with inherent work recovery. The use of solid working materials and environmentally benign heat transfer fluids ensures that the production and release of GHG and ozone depleting substances are minimized. The ability to generate work provides a new approach to power generation from low-grade sources including solar, biomass, and waste-heat. Magnetic regenerators near room temperature are somewhat unique in their use of oscillating liquid heat transfer fluids. Large power densities are desired so as to minimize capital costs, thus, high operating frequencies are beneficial. High efficiencies require optimal distribution of magnetic work throughout the regenerator. One of the main challenges in magnetic regenerator design is determining the type and quantity of magnetocaloric material. The proposed research program will use a full range of methods including thermodynamic modeling and experimental characterization to optimize regenerator composition. The potential applications of magnetic cycles are numerous and may lead to new technologies for improved delivery of energy services. Furthermore, the promise of increased performance over existing technologies aligns with sustainability goals. The multi-disciplinary nature of the topic creates a rich environment for innovation and training of highly qualified personnel. Students and research associates will develop strong analytic skills and in-depth knowledge of thermofluids, material science, and applied magnetism - skills needed wherever technical innovation is desired.