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Unformatted text preview: 0.06
.9 T (hr)
7 Energy (kWh)
$8.26 Table 5.1: Example of model used in CCA analysis for a typical living room in a given week
in the summer. Costs are calculated using a rate of $0.15kWh, the average residential price in
Massachusetts in 2010.
use for CCA was then determined indirectly from the measurements using the following equation: ECCA = Erotal - EHVAC - where EccA Elighting - Eother refers to the process electricity used in CCA and Eother (5.2) refers to the process electricity used by equipment in areas other than CCA that were fed by the same substations. Comparing
the model output, EcCA with the actual electricity measured by the metering system resulted in a
difference of 1.5%. The estimation error could be due to a number of reasons, including measurement
error and unmeasured systems. Despite the error, the model was considered by SMEs to be good
enough to use to identify areas to target for improvement.
While a va...
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- Spring '14