《CO_2制冷系统的技术进展》.pdf

30 2008 7 ( 127 ) CO2 制冷系统的技术进展 , , ( 西安科技大学能源学院, 西安710054) : 介绍了CO2 的发展历史和作为制冷剂的相关热物理特性; CO2 三 系统制冷循环 及其特点; 提出了带回热器膨胀机代替节流阀等几 提高CO2 制冷效率( COP) 的有效途径 由于CO2 工质在环保安全性及容积制冷量等方面具有明显的优势, 将会成为理想的环保制冷 剂之一 : 二氧化碳; 制冷剂; 跨临界循环; 制冷系统; COP :TU831. 3 : B : 1009- 3230( 2008) 07- 0030- 05 Analysis on Technology Characteristic of Carbon Dioxide Refrigeration System LI Li- xia, JI Chang- a, ZHAO Wen- xiu ( School of Energy; Xi an University of Science and Technology, Xi an, 710054, China) Abstract: Because o obvious advantage or the carbon dioxide work quality in the environmental protec tion, sa ety and the cold quantity o capacity etc, it became a tertime one o ideal environmental protection re rigerant. This paper introduced the development history o the carbon dioxide and related hot physical characteristic as a kind o re rigerant; at one time, it introduced carbon dioxide three kinds o system re rigeration system and their characteristics; otherwise this paper introduced several e ective ways to improve the carbon dioxide re rigerat ion coe icient o per ormance ( COP) such as with regeneratorexpander in stead o cutting expenditure and so on . Key words: carbon dioxide; re rigerants; transcrit ical cycle; re rigeration system; COP 0 前言 CFCs 30 , CO2 CO2 , , CO2 CO2 , CO2 CO2 , , , CO2 , 1931 ( COP) R12 ( CFCs) 1 CO2 的性质和制冷循环及其特点 , CFCs 1. 1 CO2 , CFCs