Specifics in prediction and analysis of performance of a power module in thermal schemes of combined-cycle units

摘要

Process flow diagrams of combined-cycle units include a power module comprising a gas-turbine unit (GTU) and a heat recovery steam generator (HRSG). A thermal scheme and specifics in operation of such a module are considered. A procedure is proposed for predicting the efficiency of the HRSG. Conditions of heat transfer in the HRSG are investigated and compared with those encountered in conventional steam boilers of power units. The recommendations are given for improving the accuracy of the thermal and engineering design of HRSGs.