基于低品位热源的两相热压缩机初步研究

发布时间：2018-02-05 17:42

本文关键词： 低品位热源气液两相热压缩机　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：两相热压缩机利用热源驱动,通过活塞的往复运动引起两相工质在热腔和冷腔中来回穿梭,伴随气液相变过程形成周期性的压力波动。它采用低沸点工质,具有驱动温差小、压比大等突出优点,可以利用低品位热源,如废热、太阳能等。但是,关于两相热压缩机的研究很少,对两相热压缩机的具体运行机理尚不清楚。因此,本文以对两相热压缩机的机理研究为目标,着重分析两相热压缩机实验台的性能,并对其进行深入分析,主要内容包括以下几个方面： 1、基于低品位热源两相热压缩机的研制在分析研究两相热压缩机原理的基础上,自行设计了国内首台基于低品位热源的两相热压缩机,对其设计方法和设计过程进行了详细介绍。 2、两相热压缩机的初步实验自行搭建了两相热压缩机实验台并进行了初步实验研究。分别在0.1Hz、0.2Hz和0.3Hz频率运行下,均取得了5以上的压比,加热功率最高为120W,有利于对太阳能、废热等的低品位热源的有效利用。 3、两相热压缩机性能优化为了进一步分析研究两相热压缩机实验台的性能,对该实验台分别进行了频率特性研究和冷却方式研究,研究发现,两相热压缩机的运行频率和冷却方式均对其性能产生显著影响。
[Abstract]:The two-phase hot compressor is driven by heat source and the reciprocating motion of the piston causes the two-phase working fluid to shuttle back and forth between the hot and cold cavities with periodic pressure fluctuation in the gas-liquid phase transition process. With small driving temperature difference, high pressure ratio and other outstanding advantages, we can use low-grade heat sources, such as waste heat, solar energy, etc. However, there is little research on two-phase heat compressor. The specific operation mechanism of two-phase hot compressor is not clear. Therefore, this paper focuses on the analysis of the performance of the two-phase hot compressor test bench, and deeply analyzes the performance of the two-phase hot compressor. The main elements include the following: 1. The development of two-phase heat compressor based on low-grade heat source. On the basis of analyzing and studying the principle of two-phase heat compressor, the first two-phase heat compressor based on low-grade heat source in China was designed by itself. The design method and design process are introduced in detail. 2, the preliminary experiment of the two-phase thermal compressor was carried out and the preliminary experimental research was carried out at the frequency of 0.2Hz and 0.3Hz, respectively. The maximum heating power is 120W, which is beneficial to the effective utilization of low-grade heat sources such as solar energy and waste heat. In order to further analyze and study the performance of two-phase thermal compressor, the frequency characteristic and cooling mode of the experimental platform were studied respectively. The operating frequency and cooling mode of the two-phase thermal compressor have a significant effect on its performance.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH45

【参考文献】