Type III — Low-Pressure第 165 / 240 题
Which of the following is a low-pressure refrigerant used in centrifugal chillers?
a.HCFC-123
b.HFC-410A
c.HCFC-22
d.HFC-404A
解析
HCFC-123 is a classic low-pressure chiller refrigerant, along with CFC-11 and the newer HFO R-1233zd. R-410A, R-22, and R-404A are all high-pressure refrigerants that operate above atmospheric pressure and fall under Type II. Low-pressure refrigerants boil above about 50°F at atmospheric pressure.
法律依据: 40 CFR §82.152免费刷完整 240 道题库 — 无需注册。
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