The greatest threat to global warming potential is presented by which group of r

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试卷: LEED v4 GA模拟题B卷[查看]
The greatest threat to global warming potential is presented by which group of refrigerants?
A: CFCs (ChloroFluoroCarbons)
B: HCFCs (HydroChloroFluoroCarbons)
C: HFCs (HydroFluoroCarbons)
D: CFC-500 (ChloroFluoroCarbons)

参考答案: C

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

CFC (ChloroFluorCarbons): Stable and long life with greatest Ozone Depletion Potential (ODP) caused the production to be banned in this country.
HCFC (HydoChloroFluorCarbons): Stable and short life, not as great ODP as CFCs, allowing a phase out plan
HFC (HydoFluorCarbons): Negligible impact on the ozone layer but significant Global Warming Potential (GWP)
Halocarbons: Used in the cells of foamed insulation and fire fighting systems
Natural Refrigerants: Carbon Dioxide (CO2), Water (H2O), Ammonia (NH3), Hydrocarbons (HC), Air (78% N2; 21% O2; 1% H2O2; + trace gases)
Refrigerant Management credit addresses both ozone depleting potential (ODP) and global warming potential.

Environmental concerns > global warming potential and ozone depletion