摘要:
针对当前电厂定速闭式循环冷却水泵在冬季运行中出现流量低、扬程高、不节能的问题,在多种可行的解决方案中,选取了投资最少和运行最优的双速电机方案。通过分析该方案的技术可行性、运行经济性,论证了该方案能显著降低能耗,具有明显的节能效果。广西钦州电厂2 GW机组为国内首个采用该方案的项目,相比采用常规定速电机方案,两台机组每年可节电1.231 2 GWh,全寿命期综合收益408.53万元。它的成功应用可为各类型机组设计所借鉴。
Abstract:
Concerning the problems of low-flow, high-head and high-energy-consumption that existing in the operation of closed circulating cooling water pump in winter, the scheme of two-speed motor has been selected from a variety of feasible solutions, which is the most cost efficient and best solution for operation. The feasibility, technical and economic efficiency of the scheme have been analyzed and demonstrated. The results show that the scheme has the advantage of reducing the energy consumption, and has remarkable energy-saving effect. Guangxi Qinzhou 2 GW power plant is the first one implementing this scheme in domestic. Compared to the conventional scheme, these two units can save 1.231 2 GWh each year, and generate the total amount of revenue of RMB4,085,300 during the full life circle. This scheme can be widely used in the design of the cooling water system for auxiliary machines in various types of power plant.
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