A model of irreversible magnetic Stirling refrigerators using paramagnetic material as the working substance is presented in this paper. The maximum cooling load and the corresponding performance coefficient of an irreversible magnetic Stirling refrigerator are derived. 建立了以顺磁质为工质的磁斯特林制冷机的不可逆模型.导出了不可逆磁斯特林制冷机的最大制冷率以及对应的最佳制冷系数。
The influence of the oil properties and paramagnetic substance on the NMR of formation should be considered to decrease the error of the interpretation. 核磁共振测量应当考虑到油的性质和顺磁物质的影响规律,减少影响因素带来的误差。