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引言:本文主要讨论美国制冷剂替换的问题—以“蒙特利尔协议”制定的规定为基础,旨在取消含氯制冷剂的使用,从而控制由于氯引起的大气臭氧层减少的趋势;另外,将回顾大多数美国公司对全球气候变暖所持的观点,并简要讨论正在研究和开发的以用于研制减缓全球变暖趋势的产品;最后,本文总结了美国研究和开发的总体趋势。文中将以采用谷轮公司压缩机的产品为例,因为在这方面我们了解较深。本文将不涉及白色家电用R-134a替代的问题以及大型离心冷水机组中使用的低压工质替代,如R11、R12、R-123和目前使用的R-134a。
INTRODUCTION This paper focuses on the issue of refrigerant replacement in the United States - based on the provisions set forth in the Montreal Protocol, with the aim of eliminating the use of chlorinated refrigerants to control the reduction of atmospheric ozone depleted by chlorine. In addition, Review the views of most U.S. companies on global warming and briefly discuss the products that are being researched and developed for developing trends to mitigate global warming. Finally, the paper summarizes the overall trends in research and development in the United States. The article will use Copeland compressor products as an example, because in this regard we know more about. This article will not address the replacement of white goods with R-134a and the replacement of low-pressure working fluids used in large centrifugal chillers, such as R11, R12, R-123 and the currently used R-134a.