What is NOT a natural refrigerant?

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试卷: LEED v4 GA模拟题A卷[查看]
What is NOT a natural refrigerant?
A: HFC
B: HC
C: NH3
D: CO2

参考答案: A

本题解释:
A:Make sure you do not confuse HC, which is good refrigerant, with HFC or HCFC, which are refrigerants that cause environmental issues.

Notes:

There are five refrigerants that are benign to the earth’s atmosphere. They are:

CO2 - Carbon dioxide
H2O - Water
NH3 - Amonia
HC - Hydrocarbons, such propane, butane, ethane, isobutene, and isopentane
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