摘要
CO_2作为制冷工质在环保、安全性及容积制冷量等方面具有明显的优势,是一种比较理想的环保制冷剂。介绍了CO_2用作制冷工质的发展历史和作为制冷剂的相关热物理特性以及3种CO_2制冷循环的过程及其特点;提出了带回热器、膨胀机代替节流阀等几种可以提高CO_2制冷效率的有效途径。
Because the CO2 work quality has obvious advantage in the environmental protection, safety and the cold quantity of capacity etc, making it become aftertime one of ideal environmental protection refrigerant. This text introduced the development history of the CO2 and the related hot physical characteristic as a kind of refrigerant; Introduce CO2 three kinds of system refrigeration cycle and their characteristics; Introduce several effective ways to improve the CO2 refrigeration coefficient of performance （COP） such as with regenerator,expander instead of cutting expenditure and so on.
出处
《能源技术》
2008年第5期285-289,共5页
Energy Technology
关键词
二氧化碳
制冷剂
跨临界循环
制冷系统
COP
Carbon dioxide
Refrigerants
Transcritical cycle
Refrigeration system
COP
