CAJ | 학술논문

根据内陆AP1000核电厂冷却水系统的特点，为了确保在机组整个寿命期内获得最大效益，综合考虑机组投资、运行费用及收益等因素，采用年费用最小法，对三缸四排汽双背压机组和四缸六排汽三背压机组进行了冷端优化，比较了两种类型机组经济性，并分析了冷凝管内流速、冷却倍率、凝汽器面积、冷却塔面积和气象条件等对冷端年总费用的影响。结果表明：四缸六排汽三背压机组经济性明显优于三缸四排汽双背压机组；两种类型机组冷端年总费用随冷凝管流速及冷却塔面积增加均呈先减后增的趋势，端差接近2?8℃时的凝汽器面积对应的年总费用较低；与南方厂址相比，北方厂址年总费用最小方案的冷却倍率、凝汽器面积、冷却塔面积及年总费用均减小。
근거내륙AP1000핵전엄냉각수계통적특점，위료학보재궤조정개수명기내획득최대효익，종합고필궤조투자、운행비용급수익등인소，채용년비용최소법，대삼항사배기쌍배압궤조화사항륙배기삼배압궤조진행료랭단우화，비교료량충류형궤조경제성，병분석료냉응관내류속、냉각배솔、응기기면적、냉각탑면적화기상조건등대랭단년총비용적영향。결과표명：사항륙배기삼배압궤조경제성명현우우삼항사배기쌍배압궤조；량충류형궤조랭단년총비용수냉응관류속급냉각탑면적증가균정선감후증적추세，단차접근2?8℃시적응기기면적대응적년총비용교저；여남방엄지상비，북방엄지년총비용최소방안적냉각배솔、응기기면적、냉각탑면적급년총비용균감소。
Considering the characteristics of the cooling water system in an inland AP1 000 nuclear power plant and the elements of investment, operating cost and benefit, the cold?end systems of the nuclear steam turbine using three?cylinder four?exhaust, double back pressure and four?cylinder six?exhaust, triple back pressure were opti?mized with minimum annual expense method. The system is considered to be able to ensure the maximum benefit during the wholelife of the unit. The economy of the two types of the units was compared and the effects of flow ve?locity inside the condenser tube, cooling rate, condenser area, cooling tower area and meteorological condition on the annual expense were investigated. The results show that the economy of the steam turbine unit with four?cylin?der six?exhaust, triple back pressure is much better than that with three?cylinder four?exhaust, double back pres?sure. Both of the annual expenses of the two types of the units decrease at the early stage and then increase with the increase of the flow velocity inside the condenser tube or cooling tower area. The annual expense of the condenser area with the terminal temperature difference close to 2?8℃ is relatively low. In the scheme suggested by minimum annual expense method, the cooling rate, condenser area, cooling tower area and total annual expense in a northern power plant are less than those in a southern power plant.