基于太阳能的吸收压缩混合循环热泵系统研究

发布时间：2018-05-16 17:43

本文选题：吸收/压缩 + 混合系统　；参考：《浙江大学》2013年博士论文

【摘要】：随着建筑能耗的日益增长,降低采暖空调能耗已成为降低建筑能耗的重点。采暖空调设备中以电驱动热泵机组占主导,提高电驱动热泵的性能和能效,对于缓解电力峰谷差和城市电力紧张有重要意义。太阳能吸收热泵具有季节优势,能显著降低碳排放和缓解电力峰谷差,但具有不稳定和效率低的特点。本文提出的基于太阳能的吸收压缩混合系统融合了吸收子系统和压缩子系统的各自优点,并弥补了单独子系统的不足。主要研究内容如下： (1)阐述了机械热泵系统优势和面临的矛盾,以及太阳能、余热废热的应用情况,分析得出吸收压缩混合热泵系统的意义,并介绍了吸收-压缩混合系统的国内外研究现状。 (2)阐述了夏冬两季吸收压缩混合系统的多种运行模式,计算了新型吸收压缩混合制冷制热循环的热力性能,分析了混合循环制冷(制热)COP和吸收子系统COP随发生温度、冷凝温度和蒸发温度的变化,并比较了混合循环和压缩子系统的制冷制热循环性能。 (3)搭建了太阳能吸收压缩混合热泵及其控制系统实验台,实验研究了混合热泵实验装置的制冷制热性能随发生温度、冷凝温度和蒸发温度的变化关系,实验得出随着发生温度、冷凝温度和蒸发温度的升高,混合循环热泵的制冷(制热)量和制冷(制热)COP均大于压缩子系统的,证明混合循环系统相对于单独的压缩子系统更具有优势。 (4)发生器是吸收子系统中的重要部件,进行了不同质量流量稀溶液对发生热性能影响的实验,得出存在最佳稀溶液循环量使得发生热最大。同时,对发生器管外对流换热系数随稀溶液浓度和喷淋密度的变化趋势进行了实验,得出发生器管外对流换热系数随着稀溶液浓度的增加和喷淋密度的增加而增大,管外对流换热系数的变化范围为150-365W/m2.℃。
[Abstract]:With the increasing energy consumption of the building, reducing the energy consumption of heating air conditioning has become the key to reduce the energy consumption of the building. The electric driven heat pump unit is dominant in the heating and air conditioning equipment, improving the performance and energy efficiency of the electric driven heat pump. It is of great significance to alleviate the peak and valley difference and the urban power shortage. The absorption and compression hybrid system based on solar energy combines the advantages of the absorption and compression subsystem, and makes up for the shortcomings of the single subsystem. The main contents are as follows:
(1) the advantages and contradictions of the mechanical heat pump system, as well as the application of solar energy and waste heat waste heat are expounded. The significance of the absorption and compression hybrid heat pump system is analyzed, and the research status of the absorption compression hybrid system at home and abroad is introduced.
(2) the various operating modes of the absorption and compression mixing system in the two season of summer and winter are expounded. The thermodynamic performance of the new absorption and compression mixing refrigeration system is calculated. The changes of the mixed cycle refrigeration (heating) COP and the absorption subsystem COP with the occurrence temperature, the condensation temperature and the evaporation temperature are analyzed, and the system of mixed cycle and the compression subsystem is compared. Cold heat cycle performance.
(3) the experimental platform of a solar absorption and compression hybrid heat pump and its control system was set up. The relationship between the temperature, the condensation temperature and the evaporation temperature of the cooling heat of the mixed heat pump experimental device was studied. The experimental results showed that the cooling (heat production) of the mixed cycle heat pump was increased with the increase of the temperature, the condensation temperature and the evaporation temperature. And the refrigeration (heating) COP is larger than the compression subsystem, which proves that the hybrid cycle system has more advantages than the compression subsystem alone.
(4) the generator is an important component in the absorption subsystem. The experiment on the effect of different mass flow dilute solution on the thermal performance is carried out. It is concluded that the best dilute solution circulation can make the maximum heat occur. At the same time, the variation trend of the convection heat transfer coefficient outside the generator tube with the concentration of dilute solution and the spray density is experimentation, and the generator is obtained. The coefficient of convective heat transfer outside the tube increases with the increase of dilute solution concentration and spray density, and the convection heat transfer coefficient outside the tube ranges from 150-365W/m2. degrees.

【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU832.17;TK519

【参考文献】