Design Of The Magnetic Field Of Magnetic Refrigeration System

Magnetic refrigeration technology is a new green refrigeration technology. It has advantages,such as, high efficiency, compact conformation and no environmental pollution. This articlemain research work is as follows:The refrigeration principle and the halbach principle were analyzed theoretically.Six typical magnetic circuits of room temperature magnetic refrigeration system models areestablished. Through the simulation and analysis of these models, first magnetic flux distributionnephogram is obtained. Then by using post-processing three important indicators includingmagnet utilization coefficient, magnetic performance coefficient and volume of permanentmagnet are gained. Finally, a comparison of the pros and cons of these structures is made, andthe specific reason for the discrepancy between with six structures is analyzed. Five principlesfor designing magnetic circuit of room temperature magnetic refrigeration system that should befollowed are summarized.A permanent magnet magnetic circuit improved based on the halbach theory is given in thispaper. In case of indicators meet the requirements, by comparing indicators of these structuresthe new structure uses less volume of permanent magnet than typical magnetic circuit of roomtemperature magnetic refrigeration. At last, through optimizing the new magnetic circuit modelsize, the optimal size data are concluded.