【作者】 张丽；

【导师】 沈致和；

【作者基本信息】 合肥工业大学 ， 市政工程（专业学位）， 2015， 硕士

【摘要】 目前,建筑节能是世界普遍关注的问题,同样也是我国能源政策关注的焦点。由于中央空调系统能耗是建筑能耗的主要组成部分,所以空调系统的节能便成为降低建筑能耗的主要发力点。空调系统一般包括风系统和水系统,而其中水系统能耗又在整个空调系统中占有很大的比例,所以,对空调水系统进行节能研究具有重要意义。在实际中央空调系统中,经常会遇见系统中部分房间过冷,而部分房问却不冷的现象,这主要是由于水泵选型和管段阻力确定不合理等因素导致的水力失衡引起的结果。本文以合肥地区建筑空调项目中经常出现的水力失调现象作为切入点,具体分析了一个实际工程中央空调水系统的水力失调状况以及建筑能耗情况。首先利用DeST软件对空调季节逐时建筑冷负荷进行了模拟,并且计算出空调系统中冷水机组、冷冻水泵、冷却水泵的耗电比例,发现冷水机组占76.52%,输送系统及末端占23.48%。其次为了研究负荷、冷冻水温与能耗的关系,建立了此冷冻水系统的数学模型,并利用Matlab simulink仿真模块建立冷冻水系统仿真模型,结果表明当冷冻水进水温度为8.2℃、建筑实时负荷为1330KW时,空调系统能耗功率为180KW。最后研究此项目水力失调问题,利用网络图论的方法,建立空调水系统网络图,计算出此建筑空调系统末端流量,具体分析了水力失调的原因；计算出同一分支管段分别采用“同程式”和“异程式”的末端流量,结果表明当分支管段比较长时,宜采用“同程式”。更多还原

【Abstract】 Now the building energy-saving is a hot issue for the world, and it is also attracted attention mostly in China. The central air-conditioning system as the big one of energy consumption in buildings, since then Air-conditioning unit is a key point and shortcut for the energy-cutting in building, and the latter consumption have a dominant status, so giving more resources on studying the water cycle systems and learning what the consume come from or how to do with it is significant for our energy-saving. Actually, there we often encountered the phenomenon that some rooms of the air-conditioning projects were overcool, but the others hot, that result came from what we called "The hydraulic-imbalancment", nevertheless the pumping system’ unresonable selection and the wrong pipe resistance caused "The hydraulic-imbalancment".In this paper, a central air-conditioning system project, in Hefei Anhui, were studied. Basing on the key point of "The hydraulic-imbalancment", energy consumption and hydraulic conditions about the air-conditioning system of this project were analysised. First, with the help of the DeST software, the thesis had simulated the air-conditioning cooling load, and calculated energy consumption of the cold water assembly, the chilling water pumps, the cooling water pumps in the air-conditioning water system, the results showed us that the cold water assembly occupied the more percentage 76.52%, the rest was shared by the conveying system,such as the chilling water pumps and the cooling water pumps. Second, in order to study the relationship the construction load value, the chilling water temperature with energy consumption in the air-conditioning, there had established the mathematical model of the chilling water system, and according to the Matlab simulink module, we setted up the chilling water simulation system. The results showed that when the chilled water temperature is 8.2 ℃, the building’s load is 1330 KW, and the power consumption of the air-conditioning system is 180 KW. Finally, basing on the "network-graph theory", the paper had studied the hydraulic imbalance of this project, there we had established a network diagram to calculate the flow at the end units of the air-conditioning system, and analysised the reasons why "The hydraulic-imbalancment" would emerse in the ai-conditioning system; Also the paper had investigated the end of the flow rate of the end pipe units when the units were arranged by adoptted "the same branch pipes" model and "the different branches pipes" model respectively, the results show that when a long branch piped were selected, "the same branch pipes" model will be reasonable for the hydraulic balancing.更多还原