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对于火电厂厂内建筑的冷热联供系统,供冷(热)工况通常采用独立系统,存在设备管路利用效率低,综合能耗高等问题。采用溴化锂双工况热泵机组,对制冷、制热工况下的设备管路系统进行集成优化设计,使用一套系统满足两种工况需求,且冬季可以吸收利用电厂辅机冷却水余热。通过控制电动阀开关、辅机启停等实现冷/热工况的切换,大大提高设备管路系统的使用效率和自动化水平。与常规方案进行技术经济对比,表明其结构精简、功能完善、投资运行费用较低。
For hot and cold cogeneration systems in thermal power plant construction, usually independent systems are used for cooling (hot) working conditions, which results in problems of low utilization efficiency of equipment lines and high overall energy consumption. Lithium bromide double-case heat pump unit is used to optimize and integrate the equipment piping system under refrigeration and heating conditions, and one set of system is used to meet the requirements of two working conditions. In winter, waste heat of auxiliary cooling water of power plant can be absorbed and utilized. By controlling the electric valve switch, start and stop auxiliary engine to achieve cold / hot conditions to switch, greatly improve the use of equipment, piping system efficiency and automation level. The technical and economic comparison with the conventional schemes shows that the structure is streamlined, the functions are perfect, and the investment and running costs are relatively low.