A building will engage in a long -term contract to purchase CHP thermal output f

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试卷: LEED AP BD+C模拟题C[查看]
A building will engage in a long -term contract to purchase CHP thermal output from a district CHP system. The building’s annual thermal energy costs are estimated to be $53,268. The building’s renewable systems will produce enough energy to offset $5,450 of those costs.
How much reliance will the building need for its thermal energy to qualify for Energy and Atmosphere Credit, Optimize Energy Performance?
A: $43,036
B: $42,614
C: $38,254
D: $47,941

参考答案: A

本题解释:
Notes:
Reference: Energy and Atmosphere Credit, Optimize Energy Performance, Implementation, CHP, Case 4, C
Under Case 4, a project must meet 2 additional criteria:
1. Engage in a minimum 10 year contract to purchase CHP thermal output from the district CHP system.
2. Rely on the district system for 90% of its thermal energy, exclusive of any renewable energy
The building’s annual thermal energy cost is $53,268.
First subtract out the renewable energy.
$53,268 - $5,450 = $47,818
$47,818 X 90% = $43,036
Benefits of a CHP system include:
-Reductions in peak demand
-Reductions in overall electrical system transmission and distribution losses
-Fewer emissions are produced
-Excess capacity can be sold to the grid
-The ability to capture and reuse heat that would be otherwise wasted