水源多联机热特性研究

发布时间：2018-01-06 09:30

本文关键词：水源多联机热特性研究　出处：《华中科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着社会经济的发展，人们对居住环境的要求越来越高，同时节能环保意识也不断增强，水源多联机结合了多联机技术和可再生能源的优点，现在已得到越来越多的应用。水源多联机在日本技术已很成熟，但国内对于水源多联机的研究起步晚，可参考的资料有限，，关于水源多联机热特性能查到的资料很少。从这一点出发，建立了一个水源多联机的仿真模拟平台，并对水源多联机全年运行特性进行了模拟分析，分析水源多联机的热特性。本文首先将系统中制冷剂、水、空气的主要参数程序化，然后对压缩机、膨胀阀、换热器等系统所需的主要组件合理选择类型后建立物理模型，并对各模型的计算流程进行了设计和描述；本文提出了一种压缩机频率控制制冷剂流量、循环水量控制室外机过冷/热度的新控制方法，建立了室内机模块、室外机模块等主要模块，建立了基于TRNSYS的水源多联机仿真平台，并对系统全年的运行特性进行了模拟分析。模拟结果表明，水源多联机系统夏季负荷率为40%-70%时效率较高，其中负荷率为60%左右运行效率最高，冬季负荷率为50%-60%时效率最高；系统额定制热容量大于制冷容量，且负荷率一定时系统制热效率均高于制冷效率；夏季和冬季系统的平均性能系数都比较高，全年平均运行效率比较高，该系统节能效果较好。
[Abstract]:With the development of social economy, people have higher and higher requirements for the living environment. Meanwhile, the awareness of energy saving and environmental protection is also increasing. Water resources online combines the advantages of multi-online technology and renewable energy. Now, more and more applications have been made. The technology of water source multi-online is very mature in Japan, but the domestic research on water multi-online has started late, and the reference data is limited. Based on this, a simulation simulation platform is established, and a simulation analysis is carried out on the characteristics of multi-source multi-on-line thermal characteristics in the whole year. The thermal characteristics of multi-line water source are analyzed. In this paper, the main parameters of refrigerant, water and air in the system are programmed firstly, and then the physical model is established after the main components of compressor, expansion valve and heat exchanger are reasonably selected. The calculation flow of each model is designed and described. In this paper, a new control method of compressor frequency controlled refrigerant flow and circulating water is proposed to control the supercooling / heat of outdoor unit. The main modules such as indoor unit module, outdoor unit module and so on are established. A multi-on-line water source simulation platform based on TRNSYS is established, and the operating characteristics of the system throughout the year are simulated and analyzed. The simulation results show that. The efficiency of the system is higher when the load rate is 40% -70% in summer, and the efficiency is the highest when the load rate is about 60%, and the load rate is 50% -60% in winter. The rated heating capacity of the system is larger than the refrigeration capacity, and the heating efficiency of the system is higher than that of the refrigeration when the load rate is constant. The average performance coefficient of the system is higher in summer and winter, and the annual average operating efficiency is higher.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831

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