660MV Ultra Supercritical Unit Optimal Design Of High Pressure Heater

With the rapid development of China’s power industry, an increasing number ofhigh-parameter and large-capacity unit. Parameters increase, the capacity increase, alsoincreasing the size of high-pressure heater, but also increased the design, manufacturedifficult. In order to improve plant efficiency, reduce coal consumption and reduce theplant’s production costs, in recent years, China has closed more than50MW,100MW,125MW units, and the reconstruction and extension of the large number of600MW,1000MW unit.660MW ultra supercritical unit in recent years has been the development ofstrong, because it effectively to improve the efficiency of the unit.Based on the turbulent heat transfer to the water factor in the derivation of simplifiedheat transfer from the wall to the water sub-coefficient calculation process, through thesteam to heat transfer coefficient of wall heat transfer sub-derived factor, part of thesimplified heat transfer gas to the wall fractional the calculation. Based on thecharacteristics of steam, pressure or temperature, to establish some physical parametersrelated to fitting formula to reduce the look-up table work. Thus660MW ultrasupercritical units to optimize the design of high-pressure heater, so that the design of amore economical heater, heating plant area closer to the actual needs of production costs.