The selection of a less efficient refrigerant for HVAC&R systems can result in a

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试卷: LEED GA模拟题A[查看]
The selection of a less efficient refrigerant for HVAC&R systems can result in an increase in what types of emissions?
A: CFCs
B: VOCs
C: CO2
D: NH3
E: Radon

参考答案: C

本题解释:
CFCs are some of the most efficient refrigerants, but they are bad for the environment and banned under the Montreal Protocol;VOCs, or volatile organic compounds, are an emission from building materials such as carpets and paints. New car smell is an example of a VOC;Less efficient refrigerants will consume more energy (usually consuming fossil fuels) resulting in greater release of CO2 into the atmosphere by the electricity provider;NH3 is ammonia and a type of natural refrigerant;Radon is a naturally-occurring radioactive gas that may cause cancer, and may be found in drinking water and indoor air. Some people who are exposed to radon in drinking water may have increased risk of getting cancer over the course of their lifetime, especially lung cancer. Radon in soil under homes is the biggest source of radon in indoor air, and presents a greater risk of lung cancer than radon in drinking water. (EPA) Reference: The Treatment by LEED of the Environmental Impact of HVAC Refrigerants