A building has a wind energy system added to the roof. According to the US DOE\\

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试卷: LEED AP ID+C 模拟试卷B[查看]
A building has a wind energy system added to the roof. According to the US DOE’s Commercial Buildings Energy Consumption Survey the estimated electricity the project will use will be 100,000 kWh/year. Energy costs in the area are $8.15/kWh. How much energy must the wind system produce to earn 3 points for the project?
A: $81,500
B: $20,375
C: $40,750
D: $61,125

参考答案: A

本题解释:
To earn 3 points the project must earn Sustainable Sites Credit, Site Selection, On-site Renewable Energy and exemplary performance, which requires 10% renewable energy.

The estimated energy use is 100,000kWh from the CBECS database. This multiplied by the cost per kilowatt hour gives an annual energy cost of $815,000.

$815,000 X 10% = $81,500