以太阳能为驱动热源,基于喷射式制冷和ORC,构建一种太阳能喷射式制冷功冷联供系统,该系统分为太阳能集热子系统和功冷联供子系统两部分。以R161为功冷联供子系统循环工质,通过Matlab建立该系统热力学模型,对其性能进行模拟,在设计工况下该系统制冷量为2.893 kW,净输出功为1.594 kW,功冷联供子系统制冷效率为12.47%,发电效率为6.87%,效率为41.45%。通过分析可知,该系统损占比较大的部件依次为太阳能集热器（73.3%）、发生器（12.14%）、蒸发器（5.03%）和透平（4.81%）。考虑到实际过程,分别研究系统内部参数改变和外部环境参数改变,对系统的影响,发现高低压发生器的温升由利于系统性能的提升,同时环境温度的升高以及太阳辐照度的提升均可改善集热器效率,从而提升系统性能。
Abstract
With the solar energy as the driving heat source, based on the ejected refrigeration and ORC, a combined power-cooling supply system with the solar ejected refrigeration is constructed, The system is divided into two parts： solar-heat collection subsystem and combined power-cooling supply subsystem. The R161 is used as the circulating working fluid of the combined power-cooling supply subsystem, a thermodynamic model of the system has been established through the Mtalab, and its performance is simulated. Under the design conditions, the refrigerating capacity of the system is 2.893 kW, the net output power is 1.594 kW, the refrigerating efficiency of the combined power-cooling supply subsystem is 12.47%, the power generation efficiency is 6.87%, and the exergy efficiency is 41.45%. According to the exergy analysis, the components with a relatively large exergy loss in the system are the solar heat collector （73.3%）, generator （12.14%）, evaporator （5.03%） and turbine （4.81%）. Considering the actual process, the influence of the changes in the internal parameters of the system and the changes in the external environment parameters on the system is studied separately, It is found that the temperature rise of the high and low pressure generator is beneficial to the improvement of the system performance, at the same time, the efficiency of the heat collector can be all improved by the rise in the ambient temperature and the increase in the solar irradiance, thereby, the performance of the system is enhanced.
关键词
太阳能集热器 /
太阳能制冷 /
入射太阳辐射 /
喷射器
Key words
solar ccllector /
solar refrigeration /
incident solar radiation /
exergy /
ejector
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