热力发电
熱力髮電
열력발전
Thermal Power Generation
2015年
8期
74-78
,共5页
超超临界%1 000 MW机组%梯次循环%热力系统%热耗率%能级效率
超超臨界%1 000 MW機組%梯次循環%熱力繫統%熱耗率%能級效率
초초림계%1 000 MW궤조%제차순배%열력계통%열모솔%능급효솔
ultra-supercritical%1 000 MW unit%echelon cycle%thermal system%heat rate%energy grade effi-ciency
以某超超临界1000 MW机组的THA工况为例，采用能级效率法对梯次循环(EC)的热力系统进行能损分析，获得了该工况下热力系统的能损值，验证了能级效率法的计算精度.针对热力系统分缸压力及抽汽压力的优化设计，采用模式搜索算法对 EC 的热力系统进行优化，结果表明：采用 EC 后，在满足相关约束条件下，超超临界1000 MW 机组的热耗率由7218．43 kJ/(kW?h)降至7177．22 kJ/(kW?h)，设计热耗率显著降低.
以某超超臨界1000 MW機組的THA工況為例，採用能級效率法對梯次循環(EC)的熱力繫統進行能損分析，穫得瞭該工況下熱力繫統的能損值，驗證瞭能級效率法的計算精度.針對熱力繫統分缸壓力及抽汽壓力的優化設計，採用模式搜索算法對 EC 的熱力繫統進行優化，結果錶明：採用 EC 後，在滿足相關約束條件下，超超臨界1000 MW 機組的熱耗率由7218．43 kJ/(kW?h)降至7177．22 kJ/(kW?h)，設計熱耗率顯著降低.
이모초초림계1000 MW궤조적THA공황위례，채용능급효솔법대제차순배(EC)적열력계통진행능손분석，획득료해공황하열력계통적능손치，험증료능급효솔법적계산정도.침대열력계통분항압력급추기압력적우화설계，채용모식수색산법대 EC 적열력계통진행우화，결과표명：채용 EC 후，재만족상관약속조건하，초초림계1000 MW 궤조적열모솔유7218．43 kJ/(kW?h)강지7177．22 kJ/(kW?h)，설계열모솔현저강저.
The energy grade efficiency method was applied to carry out energy loss analysis for thermal sys-tem of an ultra supercritical 1 000 MW unit with one reheat under THA condition.The energy loss value of the system under the above condition was obtained and the calculation accuracy of this energy grade effi-ciency method was verified.Moreover,a thermodynamic optimization method using pattern search was pro-posed for design of the cylinder pressure and extraction pressure.The result shows that,after the optimiza-tion,the heat rate of the echelon cycle thermal system dropped from 7 218.43 kJ/(kW?h)to 7 177.22 kJ/(kW?h) significantly,on the premise of satisfying the relative requirements from the factories.
