地源热泵系统运行测试与性能分析

发布时间：2018-07-12 18:25

本文选题：地源热泵 + 能效检测　；参考：《山东建筑大学》2013年硕士论文

【摘要】：地源热泵技术作为一种既可以制冷又可以供热的空调技术,由于在节能方面有着独特的优势,近年来,地源热泵系统迅速发展。在地源热泵快速发展的同时,它的实际运行效率却往往被忽略,性能检测能有效的检测系统运行的情况,为改进控制方案、提高设计精度及改善运行效率提供可靠的数据。对空调系统而言,实际运行的绝大部分时间并不是在名义工况下运行的,况的改变必然引起系统能效的变化。通过测试可以得到空调系统的运行参数及性能系数,但是每个参数的改变都将引起系统性能及能耗的变化。了解这些因素对系统的影响,有助于提高系统的运行效率,使其维持在高效运行状态,以达到节能的目的。本文首先研究了空调系统运行过程中,能够有效反应机组和系统能效的相关参数的检测理论和方法。基于空调系统运行能效的概念,在明确运行能效影响因素及其变化特征的基础上,找出在空调系统运行过程中,可以准确反映空调各子系统和整个空调系统运行能效的参数,提出适用于空调工程现场能效检测的方法,包括测试条件、仪器、过程、内容,以及在测试过程中可能遇到的问题及解决办法,为地源热泵系统的能效分析、评价奠定基础。然后,以理论分析为基础,提炼出影响地埋管地源热泵系统性能的因素,分别将部分负荷率、负荷侧变温差变流量、地源侧变流量等作为独立变量,分析了这些因素对机组和系统的影响,为系统的优化运行提供理论依据。最后,建立空调机组的数学模型,模拟了负荷率和流量等因素对机组性能的影响,得出模拟曲线及公式,然后通过工程实测验证了模拟结果的准确性。
[Abstract]:Ground-source heat pump (GSHP) technology is a kind of air conditioning technology which can be used for refrigeration and heating. Because of its unique advantages in energy saving, ground-source heat pump system has developed rapidly in recent years. With the rapid development of ground-source heat pump, its actual operating efficiency is often neglected, and the performance detection can effectively detect the operation of the system, which provides reliable data for improving the control scheme, improving the design accuracy and improving the operational efficiency. For air conditioning systems, most of the actual operation time is not in nominal operating conditions, the change of conditions will inevitably lead to changes in system energy efficiency. The operating parameters and performance coefficients of air conditioning system can be obtained by testing, but the change of each parameter will cause the change of system performance and energy consumption. Understanding the influence of these factors on the system is helpful to improve the efficiency of the system and keep it in the state of efficient operation so as to achieve the purpose of energy saving. In this paper, the theory and method of measuring the energy efficiency parameters of air conditioning system are studied. Based on the concept of operating energy efficiency of air conditioning system and on the basis of defining the influencing factors and their changing characteristics of operating energy efficiency, this paper finds out that the operating energy efficiency parameters of each subsystem and the whole air conditioning system can be accurately reflected in the operation of air conditioning system. This paper puts forward the methods of energy efficiency measurement in the field of air conditioning engineering, including test conditions, instruments, processes, contents, problems that may be encountered in the testing process and their solutions, which will lay a foundation for energy efficiency analysis and evaluation of ground-source heat pump systems. Then, based on the theoretical analysis, the factors influencing the performance of the ground source heat pump system are extracted. The partial load rate, the load side temperature difference variable flow, the ground source side variation flow rate and so on are regarded as independent variables, respectively. The influence of these factors on the unit and system is analyzed, which provides the theoretical basis for the optimal operation of the system. Finally, the mathematical model of the air conditioning unit is established, the influence of load rate and flow rate on the performance of the unit is simulated, the simulation curve and formula are obtained, and the accuracy of the simulation results is verified by the engineering measurement.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TK529;TU831

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