Study of circulation heat calculating model for thermal system in supercritical pressure power unit with second reheat cycles

The authors first apply basic theory of equivalent heat drop on the common circulation heat calculating model for thermal system in supercritical pressure power unit with second reheat cycles and other kind of condensing steam turbine by mathematical derivation strictly,based on the normal energy balance and theory of equivalent heat drop,aiming at characteristics of thermal system in which there are outer steam coolers that high pressure heater and low pressure heater carry.The calculating results of some actual examples show that the present method is simple and accurate;and it offers a foundation for the quantitative calculation of all kind of condensing steam turbine thermal system.