The variables of a magnetohydrodynamic (MHD) generator were analyzed for the application of a cogeneration system in a coal-fired power station. The MHD generator system is more efficient than other generation systems, owing to its high working temperature. The system is typically combined with a steam generator because high-temperature conditions result in significant residual heat. The magnetic and electric fields, which directly affect the electric output, should be analyzed under this condition. The electric field, velocity, and magnetic flux density of the MHD generator were analyzed, and nitrogen plasma in the temperature range of 3000 K was employed. The electric power was affected by velocity, magnetic flux density, and electric conductivity. The electric power was proportional to the square of the velocity and magnetic flux density and proportional to the electrical conductivity. A de Laval nozzle was adopted to increase the velocity. The electric power was optimized according to the angle of the de Laval nozzle. Power generation was derived through the geometrical size and magnetic flux density of the prototype Faraday-type nitrogen plasma MHD generator.

分析了磁流体动力（MHD）发电机的变量，以用于热电联产系统在燃煤电站中的应用。由于其较高的工作温度，MHD发电机系统比其他发电机系统更高效。该系统通常与蒸汽发生器结合使用，因为高温条件会导致大量余热。在这种情况下，应分析直接影响电力输出的磁场和电场。分析了MHD发生器的电场，速度和磁通密度，并采用了温度范围为3000 K的氮等离子体。电功率受速度，磁通密度和电导率的影响。电功率与速度和磁通密度的平方成正比，与电导率成正比。采用德拉瓦勒喷嘴以增加速度。根据拉瓦尔喷嘴的角度优化电功率。通过原型法拉第型氮等离子体MHD发生器的几何尺寸和磁通密度得出发电量。