Feasibility Analysis on the Application of High Pressure Serpentine Heater in 1 000 MW Coal-fired Power Plant with Double Re-heating Cycles
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Abstract
Due to the pursuit of higher design parameters in 1 000 MW power plants with double re-heating cycles, the traditional single row high pressure U-tube heater was strongly restricted since it could not meet such high parameters.As a result, the double row high pressure U-tube heater was introduced to newly constructed double re-heating units, which in turn leads to greater system complexity and operation difficulty regarding to the main feed water system. The present paper conducted the characteristic and localization domestication comparison between the new high pressure heaters (i.e. high pressure serpentine heater) and high pressure U-tube heater, results showed that: it is feasible to apply high pressure serpentine heater in 1 000 MW power plants with double re-heating cycles, considering its good system simplicity, excellent thermodynamic adaptability as well as high operation reliability. Moreover, it is recommended to apply the high pressure serpentine heater in similar engineering domains, as it will lay a firm foundation for manufacturing high pressure heaters in ultra-supercritical units with higher design parameters in the near future.
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