基于空调末端设备选型的管网能效分析  

Energy Efficiency Analysis of Pipe Network Based on Air Conditioning Terminal Equipment Selection

作　　者：陈文鉴 刘雪峰[1] CHEN Wen-jian;LIU Xue-feng(School of Electric Power,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640

出　　处：《建筑节能（中英文）》2022年第12期1-8,共8页Building Energy Efficiency

基　　金：国家自然科学基金资助项目(51778234);广东省自然科学基金资助项目(2020A1515010762);广东省省级科技计划项目(2017A020216024);天河区科技计划项目(201705YH103)。

摘　　要：空调系统末端设备的选型主观性较强,高度依赖设计人员的经验,而在使用过程中,空调设计参数的改变与负荷工况的变化会导致空调末端偏离其设计工况,造成极大的能源浪费,所以探究中央空调系统各变化因素对末端设计选型的影响机理具有重要意义。以典型的冷冻水系统为研究对象,构建末端设备的热力模型与同程管网的水力模型,在考虑末端设备运行特性及管网调节特性的影响下,探究空调各设计参数对中央空调系统末端设计选型及中央空调系统运行特性的影响。根据蒙特卡洛概率生成模型,模拟末端热湿负荷与末端设备设计选型的随机性,研究负荷与末端设计选型的随机波动对中央空调系统能效特性的影响。结果表明:热湿负荷耦合对末端性能有较大影响。在随机负荷条件下,提高空调末端设备安全系数可以提高应对极端热湿负荷的适应性,并减少冷冻水系统能效随机变化的不确定性,而末端设备换热面积对中央空调系统能耗成本的敏感性较高。研究结果为探索热湿负荷及设备选型随机性约束下的优化控制策略提供理论指导。The selection of the end equipment of the air conditioning system is subjective,highly dependent on the experience of the designer,and in the process of use,the change of the air conditioning design parameters and the change of the load condition will cause the end of the air conditioner to deviate from its design conditions,resulting in great energy waste,so it is of great significance to explore the influence mechanism of the various factors of the central air conditioning system on the selection of the end design.Taking the typical chilled water system as the research object,the thermal model of the air conditioning terminal equipment and the hydraulic model of the simultaneous pipe network are constructed,and the influence of the design parameters of the air conditioner on the design selection of the terminal air conditioning system and the operation characteristics of the central air conditioning system is explored under the influence of the operation characteristics of the terminal equipment and the regulation characteristics of the pipe network.According to the Monte Carlo probabilistic generation model,the randomness of the heat and humidity load at the air conditioning terminal and the randomness of the air conditioning terminal equipment design selection are simulated.,and the effect of the random fluctuation of load and design selection of air conditioning terminal on the energy efficiency characteristics of the central air conditioning system is studied.The results show that the coupling of heat and moisture load has a great influence on the performance of the air conditioning terminal.Under random load conditions,improving the safety factor of the air conditioning terminal can improve the adaptability to cope with extreme heat and humidity loads,and reduce the uncertainty of random changes in energy efficiency of chilled water systems,while the heat exchange area of the end equipment is more sensitive to the energy consumption cost of the central air conditioning system.The results provide theoretica

关 键 词：冷冻水系统 末端设备 热力特性模型 中央空调 

分 类 号：TU111[建筑科学—建筑理论] TK1[动力工程及工程热物理—热能工程]