采用小温差换热末端的空气源热泵空调系统性能研究

发布时间：2018-04-09 11:56

本文选题：空调系统　切入点：空气源热泵　出处：《上海交通大学》2015年硕士论文

【摘要】：解决夏热冬冷地区的冬季采暖问题对于提升该地区居民的生活质量,降低该地区的建筑能耗具有重要意义。既有解决方案存在着一次能源消耗量大、运行成本高、室内舒适性差等典型问题,为解决这些问题,本文提出了采用小温差传热末端的空气源热泵采暖空调系统解决方案。与既有家用中央空调系统相比,本文提出的通过使用小温差换热末端的新型系统,降低了对空气源热泵冷热水机组在制热工况下的冷凝温度,优化了空气源热泵机组的运行工况,提升了空气源热泵采暖空调系统的能效。进一步地,本文通过实验测试和理论模拟的方式对比了不同末端对机组能耗、COP以及室内热舒适性的影响。实验结果表明,在夏季制冷工况下,采用小温差传热风机盘管时,机组出水温度能提升到10oC,机组能耗能够降低15%左右(与采用常规风机盘管末端的系统相比);在冬季采暖工况下,采用地板辐射末端或者小温差传热风机盘管时,机组出水温度能降低到35oC,机组能耗能够降低20%左右(与采用常规风机盘管末端的系统相比)。同时,优化安装位置之后的室内末端在冬季采暖时室内气流组织更为合理,房间温度分布的均匀性更好。本文提出的利用室外环境温度联系建筑动态负荷特性和机组性能曲线的模拟结果也验证了这些结论。最后,本文提出了小温差传热风机盘管末端的设计制造方法,并对基于此系统设计的空气源热泵家庭能源中心的设计方法与运行模式做了总结。
[Abstract]:It is of great significance to solve the problem of heating in winter in hot summer and cold winter area in order to improve the quality of life and reduce the building energy consumption in this area.The existing solutions have some typical problems, such as high primary energy consumption, high operating cost and poor indoor comfort. In order to solve these problems, a solution of air source heat pump heating and air conditioning system with small temperature difference heat transfer terminal is proposed in this paper.Compared with the existing central air conditioning system, a new type of system with small temperature difference heat transfer terminal is proposed in this paper, which can reduce the condensing temperature of air source heat pump chilled and hot water unit under heating condition.The operating condition of air source heat pump unit is optimized and the energy efficiency of air source heat pump heating and air conditioning system is improved.The experimental results show that, under the condition of summer refrigeration, when small temperature difference heat transfer fan coils are used,The effluent temperature of the unit can be raised to 10 OC, and the energy consumption of the unit can be reduced by about 15% (compared with the system with the end of the conventional fan coil unit; when the floor radiating end or the small temperature difference heat transfer fan coil unit is used in the winter heating condition,The effluent temperature of the unit can be reduced to 35oC, and the energy consumption of the unit can be reduced by about 20% (compared with the system with the end of the conventional fan coil unit).At the same time, the indoor air flow distribution is more reasonable and the room temperature distribution is more uniform when the indoor end is heated in winter after optimizing the installation position.The simulation results of the outdoor ambient temperature combined with the dynamic load characteristics of the building and the performance curve of the unit also verify these conclusions in this paper.Finally, the design and manufacture method of the end of the fan coil unit with small temperature difference heat transfer is put forward, and the design method and operation mode of the air source heat pump home energy center based on this system are summarized.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83

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