本文介绍了以重油和煤为燃料的大型磁流体—蒸汽发电联合循环效率的计算结果,分析了燃煤和燃重油磁流体发电的差异,并与国外有关计算进行了比较,指出用预热空气为氧化剂的百万瓩级MHD—蒸汽发电联合循环效率均可达50％以上。强调燃煤磁流体发电是大幅度提高煤利用效率的一条现实途径。 This paper introduces the calculation results of the combined cycle efficiency of large-scale magneto-hydro power generation using heavy oil and coal as fuel, and analyzes the difference between coal-fired and heavy oil-based hydro-electric power generation and compares it with other related calculations. As the oxidant, the millionth class MHD-steam combined cycle efficiency can reach more than 50%. Emphasize that coal-fired magnetic fluid power generation is a realistic way to greatly improve coal utilization efficiency.