重庆地区地源热泵系统实测分析及监测策略

发布时间：2018-01-03 02:35

本文关键词：重庆地区地源热泵系统实测分析及监测策略　出处：《重庆大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来，随着我国经济高速发展，城市化进程不断加快，建筑能耗也正飞速增加，我国逐渐对建筑能源监测提出了更高的要求，国家先后出台了《大型公共建筑能耗监测系统工程技术规范》《可再生能源建筑应用示范项目数据监测系统技术导则》敦促全国建筑能耗监测水平的提高，重庆地区于2010年已建立公共建筑能耗监测平台，涵盖重庆市221栋办公建筑用能信息，2012年住房和城乡建设部再次下达《关于推进可再生能源建筑应用数据监测系统建设工作的通知》，着重强调可再生能源应用系统监测平台工作建立的重要性与迫切性。地源热泵作为一项可再生能源技术应用，由于其节能环保的优势，在国内正迎来前所未有的快速发展，本文主要针对重庆地区地源热泵系统的运行策略及监测系统的开发开展了以下研究：本文从重庆地区气候特征及各类建筑的运行特性出发，对重庆地区的办公建筑进行了动态负荷特征模拟分析，从负荷累积角度，量化分析了办公建筑全年空调累计热负荷与空调累计冷负荷的不平衡性以及地埋管换热器累计热负荷与累计冷负荷的不平衡性；从负荷动态变化角度，分析得到重庆地区办公建筑全年空调负荷率分布规律与地埋管换热器负荷率分布规律。通过对重庆市某地源热泵系统的实测，，对实际运行的地源热泵系统现状进行了解，着重分析了地源热泵系统的节能性；通过对办公建筑的地源热泵系统进行的冬夏两季实测，分析得到实际运行中的办公建筑全年空调负荷率分布规律与地埋管负荷率分布规律，并与模拟结论比对分析。针对该地源热泵系统与该地区其他低能效地源热泵系统表现出的不同现象，结合该系统的调控策略，分析其调控策略的优势，针对其调控策略提出系统的监测策略，最后结合系统运行中出现的不良现象，提出辅助监测策略。通过能耗模拟以及工程实测的方法，本文对办公建筑空调负荷的分布规律及地源热泵系统监测策略得到以下结论： 1）根据能耗动态模拟结果，从负荷强度的变化角度出发，重庆地区办公建筑应用地源热泵系统处于设计负荷的25-50%运行时间最长，地埋管负荷率在全年的主要分布区间为75%~100%；从全年负荷累积的角度出发，建筑空调累计冷负荷与累计热负荷的比例为34/100，岩土累计得热量与累计失热量的比例为23/100。地源热泵实测分析，办公建筑空调负荷率在全年的主要分布区间为50%~75%，地埋管负荷率在全年的主要分布区间为50~75%，于此同时，建筑空调负荷与埋管负荷不仅在全年不同季节动态变化，而且在每天不同小时段都是动态变化的。 2）针对建筑空调负荷与埋管负荷动态变化，地源热泵监测策略中监测对象为系统用户侧进出机组的水温、流量、用户侧水泵进出口压力、水泵耗电量、埋管侧供回水温度、流量及岩土温度。
[Abstract]:In recent years, with the rapid development of our economy, the process of urbanization continues to accelerate, building energy consumption is also increasing rapidly, China has gradually put forward higher requirements for building energy monitoring. The country has issued the "large-scale public building energy consumption monitoring system engineering technical specifications", "Renewable energy building application demonstration project data monitoring system technical guidelines" urged the national building energy consumption monitoring level to improve. In 2010, Chongqing has established the energy consumption monitoring platform of public buildings, covering 221 office buildings in Chongqing. In 2012, the Ministry of Housing and Urban-Rural Construction again issued the Circular on promoting the Construction of Renewable Energy Building Application data Monitoring system. The importance and urgency of establishing a monitoring platform for renewable energy application systems are emphasized. As a renewable energy technology application, ground source heat pump (GSHP) has the advantages of energy saving and environmental protection. In China, there is an unprecedented rapid development. This paper mainly focuses on the operation strategy of ground source heat pump system and the development of monitoring system in Chongqing area. Based on the climate characteristics of Chongqing area and the operation characteristics of all kinds of buildings, the dynamic load characteristics of office buildings in Chongqing area are simulated and analyzed in this paper, from the point of view of load accumulation. The unbalance between the accumulative heat load of air conditioning and the accumulative cooling load of air conditioning in office buildings and the unbalance between accumulative heat load and accumulated cooling load of underground tube heat exchanger are analyzed quantitatively. From the point of view of load dynamic change, the distribution law of air conditioning load rate in Chongqing office building and the load rate distribution law of underground tube heat exchanger are obtained. Based on the actual measurement of a ground source heat pump system in Chongqing and the actual operation of the ground source heat pump system, the energy saving performance of the ground source heat pump system is analyzed. Through the ground source heat pump system of office buildings measured in winter and summer, the distribution law of air conditioning load rate and the distribution law of underground pipe load rate of office buildings are obtained. The results are compared with the simulation results. In view of the different phenomena between the local source heat pump system and other low energy efficiency ground source heat pump systems in this area, the advantages of the control strategy are analyzed in combination with the control strategy of the system. According to the control strategy, the system monitoring strategy is put forward. Finally, the auxiliary monitoring strategy is put forward according to the bad phenomena in the system operation. By means of energy consumption simulation and engineering measurement, the distribution of air conditioning load in office buildings and the monitoring strategy of ground-source heat pump system are discussed in this paper. 1) according to the dynamic simulation results of energy consumption, from the point of view of the change of load intensity, the ground-source heat pump system used in office buildings in Chongqing has the longest running time of 25-50% of the design load. The main distribution range of the load rate of buried pipes in the whole year is 75 / 100. From the point of view of annual load accumulation, the ratio of cumulative cooling load to accumulated heat load of building air conditioning is 34/100. The ratio of accumulated heat gain to accumulated heat loss is 23 / 100. The measured analysis of ground source heat pump shows that the main distribution range of air conditioning load rate in office buildings is 50 / 75%. The main distribution range of underground pipe load rate in the whole year is 50 ~ 755.At the same time, the air conditioning load and buried pipe load of building not only change dynamically in different seasons of the whole year. And it is dynamic at different times of the day. 2) in view of the dynamic change of air conditioning load and buried pipe load in building, the monitoring objects of ground source heat pump monitoring strategy are water temperature, flow rate, inlet and outlet pressure of water pump on user side and power consumption of water pump. Return water temperature, flow rate and geotechnical temperature on the side of buried pipe.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU83

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