热带草原气候区干式冷却空调系统冷却水优化  

Optimization of air conditioning cooling water system in savanna climate zone based on dry cooling

作　　者：田鹏 于涛[1] 李向东 TIAN Peng;YU Tao;LI Xiangdong(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Provincial Architectural Design&Research Institute Co.,Ltd.,Jinan 250001,China)

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]山东省建筑设计研究院有限公司,山东济南250001

出　　处：《山东建筑大学学报》2023年第2期49-56,共8页Journal of Shandong Jianzhu University

基　　金：山东省自然科学基金项目(ZR2019MEE083)。

摘　　要：空调冷却水温度和温差的取值对于系统运行能耗有着重要影响。文章以处于热带草原气候区的联合国驻西非某办公建筑为研究对象,利用瞬时系统模拟程序软件(TRNSYS)建立空调冷源系统仿真模型,分析干式冷却器换热效率的影响因素及冷却水温度对冷水机组的影响,并从冷却水供水温度、冷却水供回水温差以及系统调控策略3个方面分析和优化了不同运行工况。结果表明:降低冷却水供水温度和干式冷却器负荷率、增大冷却水温差均可提高系统能效;原设计方案冷却水温度取值偏高,采用优化后的冷却水供水温度和供回水温差运行时,可节能12.9%,而采用降低干式冷却器负载率的控制策略能使系统能效比进一步提升。The values of cooling water temperature and temperature difference have a significant impact on the operation energy consumption of air-conditioning system.In this paper,the United Nations office building in West Africa,which is located in the savanna climate zone,was adopted as the research object.The Transient System Simulation Program software(TRNSYS)was used to establish a simulation model of air-conditioning cooling system to analyze the influencing factors of heat transfer efficiency of dry cooler and the influence of cooling water temperature on chiller.Then,the different operating conditions were evaluated and optimized in three aspects:the cooling water supply temperature,the cooling water temperature difference and the system regulation strategy.The simulation results showed that the energy efficiency of the system would be improved by reducing the temperature of supply cooling water,increasing the temperature difference of cooling water and reducing the load rate of dry cooler.The original design scheme took a high level of cooling water temperature,however,the system energy consumption was reduced by 12.9%when the optimized cooling water supply temperature and the temperature difference were used.The energy efficiency ratio of the system can be further improved by decreasing load rate of dry cooler.

关 键 词：冷却水温度 热带草原气候 冷却水温差 干式冷却器 负荷率 

分 类 号：TU831.36[建筑科学—供热、供燃气、通风及空调工程]