地源水井群回灌特性模拟与分析

发布时间：2018-01-21 12:10

本文关键词： 地下水源热泵回灌井模拟仿真优化运行漫水　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：地下水源热泵系统是采用地下水作为低位热源,并利用热泵技术,通过少量的高品位能输入,实现冷热量由低品位能向高品位能的转移,从而达到为使用对象供热或供冷的一种系统。地下水源热泵技术以其节能、环保、运行费用低等优势得到了社会大众的青睐。在地下水源热泵系统中,除了需要抽取足够的地下水量外,还应该把同量的地下水回灌到原来的含水层中,以使水资源得到循环利用,因此对地源水井群回灌特性探究尤为重要。本文选取武汉地区的一栋办公大楼地下水源热泵兼冰蓄冷系统中的地源侧系统作为研究的基准系统。依据相关的设计图纸,确定基准系统的相关计算参数。采用Flowmaster流体仿真软件建立基准模型,应用模拟仿真的方法对地源侧回灌井群回灌过程中的水力特性,流量分配特性等进行分析研究,从而分析地源侧水系统的流量是否达到设计要求,该系统的回灌过程属于重力回灌还是余压回灌。最后,解决各回灌井回灌流量失衡问题,并提出优化运行方案。地源取水与回灌系统模拟主要是采用流体系统仿真软件对地下水源热泵系统地源侧水系统的取水与回灌过程进行仿真模拟,通过模拟地源侧水系统在不同回灌工况下的回灌过程,得出系统在设计参数下运行后实际可能达到的压力、流量等参数,并与测试结果得出的相应参数进行比较。在进行回灌系统模拟仿真前需进行实验验证,以确保模拟仿真的的可行性。模拟工具为Flowmaster流体系统仿真软件,进行验证实验的实验台为按比例缩小的取水与回灌系统实验台。论文中共对16个排气工况与34个取水回灌工况进行了回灌特性分析,对冬夏季工况进行了优化运行方案分析,得到了最优的阀门开度调节方法。
[Abstract]:The ground water source heat pump system adopts groundwater as the low heat source and uses the heat pump technology through a small amount of high grade energy input to realize the transfer of cold heat from low grade energy to high grade energy. The groundwater source heat pump technology has been favored by the public because of its advantages of energy saving, environmental protection, low operating cost and so on. In addition to the need to extract sufficient amounts of groundwater, the same amount of groundwater should be recharged into the original aquifer so that water resources can be recycled. Therefore, it is very important to study the recharge characteristics of ground source well group. In this paper, the ground source side system in an office building ground water source heat pump and ice storage system in Wuhan area is selected as the reference system. The drawings. The Flowmaster fluid simulation software was used to establish the reference model, and the hydraulic characteristics of the recharge well group on the ground side were simulated by the method of simulation. The characteristics of flow distribution are analyzed and studied to analyze whether the flow rate of the water system at the source side of the ground reaches the design requirements. The recharge process of the system belongs to gravity recharge or residual pressure recharge. Finally. To solve the problem of recharge flow imbalance in each recharge well. The simulation of groundwater intake and recharge system is mainly by using fluid system simulation software to simulate the water intake and recharge process of ground water source side water system of groundwater source heat pump system. By simulating the recharge process of the backwater system under different recharge conditions, the parameters of pressure and flow can be obtained after the system runs under the design parameters. Compared with the corresponding parameters obtained from the test results, the simulation of the recharge system needs to be verified by experiments. To ensure the feasibility of simulation, the simulation tool is Flowmaster fluid system simulation software. The experimental platform for the validation experiment is a scaled down water intake and recharge system. A total of 16 exhaust conditions and 34 water intake and recharge conditions were analyzed in this paper. The optimum operation scheme was analyzed in winter and summer, and the optimal valve opening adjustment method was obtained.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.25;TU83

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