Type III — Low-Pressure第 184 / 240 题
R-1233zd is increasingly used in modern low-pressure chillers because it:
a.Is a CFC with high ODP
b.Requires no recovery
c.Operates at very high pressure
d.It is a low-GWP HFO
解析
R-1233zd is a low-global-warming-potential HFO refrigerant used as a replacement for HCFC-123 in new low-pressure chillers. Like other low-pressure refrigerants it still runs in a vacuum and must be recovered to 25 mm Hg absolute. It has zero ozone depletion potential and a very low GWP.
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同考点相关题目
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