| 摘要: |
| 空气源热泵应用广泛，而混合工质变浓度容量调节又是一种环保节能的容量调节方式。综述了已有混合工质变浓度调节装置的现状，并根据其在系统中的放置特点进行了分类。通过分析得知，在空气源热泵中，要实现混合工质配比的改变，变浓度装置应该设在有液态工质流出的位置，采用精馏柱进行组分调整要比气液分离器或储液罐效果好，中间节流装置宜采用除毛细管以外的电动节流装置等，并且指出了空气源热泵变浓度调节装置的改进和实用化发展的方向。 |
| 关键词: 工程热物理 热工学 空气源热泵 混合工质 容量调节 |
| DOI： |
| 投稿时间：2007-09-06
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| 基金项目: |
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| Capacity Modulation Device with Changing Concentration of Mixture Refrigerant:A State-of-the-art Review |
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| Abstract: |
| Air source heat pump is widely used, and a capacity modulation with concentration of mixture refrigerant is a new type modulation of environment protection and energy conservation. In this paper, the state of the art of existing variable concentration devices with mixture refrigerant is presented and their types are described according to their locations in the system. The analysis results indicate that the variable concentration device should be set at the outlet of liquid refrigerant in order to change concentration of mixture refrigerant in air source heat pump. Moreover, a rectification section is more effective to change concentration than a gasliquid separator or liquid reservoir, and the middle throttling apparatus should be an electronic regulation device other than a capillary tube. The improvement and application of variable concentration devices in air source heat pumps are also discussed. |
| Key words: Engineering thermophysics Air source heat pump Mixture refrigerant Capacity modulation |
