污水源热泵系统设计及性能评价

发布时间：2018-03-27 13:52

本文选题：污水源热泵　切入点：污垢热阻　出处：《南昌大学》2016年硕士论文

【摘要】：污水源热泵系统以污水为冷热源,充分利用污水中蕴含的能量,不仅可以节约能源,对保护环境也具有重大意义。污水源热系统的节能环保效益已得到了大多数学者的认可。本文结合实际工程对污水源热泵系统展开研究。首先,对该工程进行了详细的系统设计及设备匹配选型,建立了空调四大部件模型。其次,在设计及模型基础上,以MATLAB软件为模拟平台,对热泵系统进行了模拟仿真。最后,本文选取了几种常用系统与污水源热泵系统在经济、节能、环保等方面进行了综合比较。通过研究发现:(1)污垢热阻越大,制冷及制热性能系数都会减小,但污垢热阻对夏季制冷的影响比冬季供暖要大;污垢热阻由0渐增到1(m2·K)/kW,制冷、制热性能系数降低的幅度分别为25.2%与11.96%;(2)污水流量越大,制冷及制热性能系数越大,但增速逐渐减小,最后制热、制冷性能系数分别稳定在4.16与8.09左右;(3)污水源热泵系统与燃煤锅炉、风冷机组等相比,在初投资、年运行费等方面都是耗资最少的,投资成本最多可节约近一半,且在节能环保方面也是最优的。
[Abstract]:Sewage source heat pump system takes sewage as the source of heat and cold, and makes full use of the energy contained in the sewage, which can not only save energy, It is also of great significance to protect the environment. The benefits of energy saving and environmental protection of sewage source heat pump system have been recognized by most scholars. In this paper, the sewage source heat pump system is studied in combination with practical engineering. The system design and equipment matching selection of the project are carried out in detail, and the model of four parts of air conditioning is established. Secondly, on the basis of the design and model, the heat pump system is simulated on the platform of MATLAB. In this paper, several commonly used systems are compared with sewage source heat pump systems in economy, energy saving and environmental protection. It is found that the larger the fouling thermal resistance is, the lower the performance coefficients of refrigeration and heating will be. However, the influence of fouling thermal resistance on summer refrigeration is greater than that of winter heating, and the fouling thermal resistance gradually increases from 0 to 1(m2 K / KW, and the decrease of heating performance coefficient is 25.2% and 11.96% respectively) the larger the sewage flow rate, the greater the refrigeration and heating performance coefficient. However, the growth rate is gradually decreasing. In the end, the heating and refrigeration performance coefficients are stable at 4.16 and 8.09 respectively. Compared with coal-fired boilers and air-cooled units, the sewage source heat pump system has the least cost in terms of initial investment, annual operating cost, etc. Investment costs can be saved by up to half, and in energy-saving and environmental protection is the best.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU83

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