一种新型消防水池蓄冷系统的运行方式及经济性分析
Operation mode and economic analysis of a new fire pool cold storage system
摘要：
利用消防水池蓄冷的设计思路已在大量工程实例中被应用,但在目前一些实例中,当消防水池中的水温超过12 ℃时,就停止对其继续利用,这导致了低品位冷源的浪费。针对此现象,提出了冷却塔和消防水池并联运行的策略,利用消防水池的低品位冷源降低冷却水温度,从而提升冷水机组运行COP,降低运行费用。针对西安西咸新区某具体项目的设计工况进行了分析,结果表明:冷凝器进水温度每降低0.5 ℃,消防水池承担的冷却水散热量占比提高约10%;与常规冷水机组系统相比,该系统在设计工况下平均每年节约运行费用约11.21万元,静态回收期为5.5 a,经济效益良好。
Abstract：
The design idea of using fire pools for cold storage has been applied to a large number of engineering examples. However, in some existing cases, when the water temperature in the fire pool exceeds 12 ℃, the continuous use of it will be stopped, which leads to the waste of low-grade cold source. In view of this phenomenon, the strategy of parallel operation of cooling tower and fire pool is proposed, and the low-grade cold source of fire pool is used to reduce the cooling water temperature, so as to improve the operation COP of the chiller and reduce the operation cost. The design condition of a specific project in Xi’an Xixian New Area is analysed, and the results show that when the inlet temperature of the condenser decreases by 0.5 ℃, the heat dissipation ratio of cooling water borne by the fire pool increases by about 10%. Compared with the conventional chiller system, the average annual operation cost of this system is reduced by about 112 100 yuan under the design condition, the static payback period is 5.5 years, and the economic benefits are good.
Keywords:fire pool; cold storage system; low-grade cold source; parallel operation; operation cost; economic analysis