Refrigeration aspects of magnetic particle suspensions

This study examines the feasibility of using magnetic particles in liquid suspension as a working fluid to achieve room temperature refrigeration with a permanent magnetic field source. Potential advantages include facilitation of regenerative heat transfer while avoiding wear, drag, and leakage problems of mechanical sliding seals associated with the use of a solid magnetic working substance. Rheological properties are evaluated in defining an appropriate composition, and performance estimates developed for a conceptual embodiment.