自然冷却系统影响因素分析及优化  

Influencing factors of natural cooling system and optimization

作　　者：武进雷 徐阳 Wu Jinlei;Xu Yang(SVOLT Energy Technology Co.,Ltd.;Nanjing Urban Construction Archives)

机构地区：[1]蜂巢能源科技有限公司 [2]南京市城市建设档案馆

出　　处：《制冷与空调》2022年第12期64-68,共5页Refrigeration and Air-Conditioning

摘　　要：由于自然冷却系统与电制冷系统对冷却水温度工况需求不同,导致两系统联合运行兼容性差,限制了自然冷却系统的应用。本文通过冷却塔简化模型,分析冷却塔散热及可运行时间的影响因素。结果表明:冷却塔在冬季运行潜热散热量大幅减少,导致冷却塔在冬季环境工况下散热能力不足;提高冷却塔回水温度,对冷却水散热温差影响较小;提高冬季用冷空调末端供回水温度兼容性可有效延长自然冷却系统全年运行时间。结合南京项目案例,提出一种自然冷却系统与电制冷复合冷源系统,相较常规系统,其自然冷却系统全年可运行时间延长1 075 h,年节约制冷系统运行费用38.1万元。Due to the different cooling water temperature conditions of the natural cooling system and the electric refrigeration system, the compatibility of combined operation of two systems is poor, which limits the application of the natural cooling system. A cooling tower simplified model is established to analyze the influencing factors of the cooling tower heat dissipation and operating time. The results show that the latent heat dissipation capacity of the cooling tower during winter operation is greatly reduced, resulting in insufficient heat dissipation capacity of the cooling tower under winter environmental conditions;increasing the return temperature of the cooling tower has a small impact on the heat dissipation temperature difference of cooling water;improving the compatibility of supply and return water temperature of the terminal in winter, it can effectively increase the annual operating time of natural cooling system. Based on a case of Nanjing project, a composite cold source system of natural cooling system and electric refrigeration system is proposed. Compared with the common system, the annual operating time of the natural cooling system is extended by 1 075 hours, and the annual operation cost of refrigeration system can be decreased by 0.381 million yuan.

关 键 词：自然冷却 模型分析 系统设计 经济分析 

分 类 号：TU8[建筑科学]