original_query: What is a magnetohydrodynamic generator (MHD generator)?
query: What is a magnetohydrodynamic generator (MHD generator)?
answer: A magnetohydrodynamic generator (MHD generator) is a type of magnetohydrodynamic converter that uses a Brayton cycle to directly transform thermal and kinetic energy into electricity. Unlike traditional generators, MHD generators have no moving parts, leading to a high theoretical thermodynamic efficiency. They've been developed as a topping cycle to improve the efficiency of power generation, particularly with coal or natural gas, where the hot exhaust gas can be used to heat boilers in a steam power plant.