低GWP值制冷剂的有限选择
发布时间：2019-03-11 11:43
【摘要】：作为现今空调系统常用的制冷剂,氢氟烃是一类潜在温室气体,并且它们对气候变化的影响会不断增长。未来,氢氟烃的使用将逐渐减少,因此必须寻找适合的替代工质。本文显示,仅有少数几种单一工质具有作为制冷剂所必需拥有的化学、环境、热力学和安全的综合特性,同时这些工质至少是微可燃的。根据筛选标准从一个综合化学品数据库中搜索了一些替代品。对于这些通过了热力学和环境特性筛选(临界温度和全球变暖潜能值)的工质,在小型空调系统中进行了性能模拟,其中包括换热器的优化。发现当考虑到更实际的系统时,存在于理想分析中的效率和制冷量之间的平衡就消失了。最高效率出现在较高单位容积制冷量附近,但存在于这个范围内的工质极少。
[Abstract]:As refrigerants commonly used in air conditioning systems today, hydrofluorocarbons (HFCs) are a class of potential greenhouse gases and their impact on climate change is increasing. In the future, the use of hydrofluorocarbons will be gradually reduced, so it is necessary to find suitable alternatives. In this paper, it is shown that only a few single refrigerants have the chemical, environmental, thermodynamic and safety properties required to be refrigerants, and at the same time, these working fluids are at least slightly combustible. Some alternatives were searched from a comprehensive chemical database based on screening criteria. For these refrigerants which have passed the thermodynamic and environmental characteristics screening (critical temperature and global warming potential) performance simulations have been carried out in small air-conditioning systems including optimization of heat exchangers. It is found that the balance between efficiency and cooling capacity existing in ideal analysis disappears when more practical systems are considered. The maximum efficiency occurs near the higher unit volume refrigerating capacity, but very few working fluids exist in this range.
【作者单位】： 美国国家标准和技术研究院;美国天主教大学;亚太建设科技信息研究院有限公司;
【分类号】：TB64
本文编号：2438252
[Abstract]:As refrigerants commonly used in air conditioning systems today, hydrofluorocarbons (HFCs) are a class of potential greenhouse gases and their impact on climate change is increasing. In the future, the use of hydrofluorocarbons will be gradually reduced, so it is necessary to find suitable alternatives. In this paper, it is shown that only a few single refrigerants have the chemical, environmental, thermodynamic and safety properties required to be refrigerants, and at the same time, these working fluids are at least slightly combustible. Some alternatives were searched from a comprehensive chemical database based on screening criteria. For these refrigerants which have passed the thermodynamic and environmental characteristics screening (critical temperature and global warming potential) performance simulations have been carried out in small air-conditioning systems including optimization of heat exchangers. It is found that the balance between efficiency and cooling capacity existing in ideal analysis disappears when more practical systems are considered. The maximum efficiency occurs near the higher unit volume refrigerating capacity, but very few working fluids exist in this range.
【作者单位】： 美国国家标准和技术研究院;美国天主教大学;亚太建设科技信息研究院有限公司;
【分类号】：TB64
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