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The California
Building Energy Initiative (CBEI) Program case study features
a 14-story office building in Irvine, CA, encompassing approximately
313,000 square feet of conditioned space. The building has
various tenants occupying the office spaces with a cafeteria
on the ground floor, a large computer room on the second floor,
and two smaller computer rooms on the first and twelfth floors.
Energy
engineers from Architectural
Energy Corporation (AEC) performed a walk-through evaluation
of selected energy systems and installed 14 MicroDataLoggers
(see Figure 1) to monitor chillers, air handler units, cooling
tower, and several electrical panels for a two-week period.
The data from the on-site evaluation and monitoring were analyzed
and DOE-2 models were run to simulate best-case scenarios
for saving energy and improving comfort in the office spaces.
A package
of energy conservation measures has been identified (see below)
along with an estimate of the implementation costs and associated
energy savings for the measures. Once the program is complete,
the customer will realize a estimated annual utility savings
of $111,000 in electricity costs (see savings
graphs). The estimated implementation costs are $73,000
providing a simple payback of eight months. The recommissioning
work will also result in improved comfort levels for building
occupants.
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