摘要
针对燃煤电站EPC项目国际招标中为保护环境,限定循环冷却水排放温度上限值问题,通过对循环水取水温度和汽轮机冷端损失的剖析,阐明了直流式循环冷却水排放对水源环境的影响是由于机组冷端损失引起的,循环水温升大小对周围水源温度场范围基本没有影响。进而对凝汽器优化设计与效益进行了论述分析,指出方案设计应尽量取用较低温水源,并优化凝汽器温升和循环冷却水量,以期减小EPC项目成本和获得较好机组性能。
Aiming at the issue of limiting the upper limit of circulating cooling water discharge temperature to protect the environment in the international bidding of EPC project of coal-fired power station, through analyzing the intake temperature of circulating water and the loss of cold end of steam turbine, it is clarified that the influence of direct circulating cooling water discharge on water source environment is caused by the loss of cold end of unit, and the temperature rise of circulating water basically has no influence on the temperature field range of surrounding water source. Furthermore, the optimization design of the condenser and benefit are discussed and analyzed. It is pointed out that in the scheme design, the water source with lower temperature should be used as far as possible, and the temperature rise and circulating cooling water quantity of the condenser should be optimized, in order to reduce the cost of EPC project and obtain better unit performance.
作者
李广春
刘慧娟
LI Guang-chun;LIU Hui-juan(China National Electric Engineering Co.,Ltd.)
出处
《电站系统工程》
2022年第5期70-72,共3页
Power System Engineering
关键词
循环冷却水排放温度
水源环境影响
冷端损失
凝汽器优化
效益分析
discharge temperature of CCW
environmental impact on water resources
cold end loss
optimized of condenser
benefit analysis