Influence of High Pressure Heater Emergency Drain Value Leakage on Heat Rate of Steam Turbine Performance Test
Due to the leakage flow cannot be measured by the No.3 high pressure heater emergency drain value in the perform-ance test of Unit 2 of a power plant,resulting in the calculated heat rate being higher than the actual value,based on the ASME PTC6 standard and based on the condensate flow,it is derived and analyzed by formula that if there is leakage in the emergency valve of the high pressure heater but the leakage flow cannot be considered,it will seriously interfere with the calculation of feed water flow and heat rate.The real influence and characteristic relationship of different high pressure heater emergency drain val-ues on the rate of the steam turbine and the influence on the heat rate without taking the leakage into consideration are calculat-ed through modeling and simulation.Therefore,it is recommended that special attention should be paid to the emergency valve i-solation effect of the high pressure heater before the performance test to ensure that there is no leakage and to guarantee the ob-jectivity of the test results.
high pressure heateremergency drain valveleakageperformance testheat rate
万方数据
维普
