Which of the following are considered natural refrigerants?(Choose 3)

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试卷: LEED v4 GA模拟题B卷[查看]
Which of the following are considered natural refrigerants?(Choose 3)
A: Ammonia
B: Carbon Dioxide
C: CFCs
D: Propane
E: HCFCs

参考答案: ABD

本题解释:
正确答案：ABD
系统解析: Knowledge Domain: Energy and Atmosphere (EA)

Natural refrigerants are naturally occurring substances that can be used as cooling agents in refrigerators and air conditioners, don’t harm the ozone layer and have no or negligible climate impact. Ammonia, Carbon Dioxide, and Propane have an Ozone Depletion Potential (ODP) of zero. Ammonia has a Global Warming Depletion (GWP) of zero, Carbon Dioxide’s GWP is 1, and Propane’s GWP is 3.

Environmental concerns > greenhouse gasses