Page 111 - Zero Net Energy Case Study Buildings-Volume 1

SCIENCE & ENGINEERING BUILDING I
CASE STUDY NO. 5
Building data analysis from 2009 through 2011 shows energy use at roughly 69%-of-benchmark, with most recent data for 2011 showing a performance of about 59%-of-benchmark. While more data collection is required to see a trend, it appears that post-commissioning activities are result- ing in improved savings. In fact, many of the building start-up problems described later in this section were being addressed and resolved during 2011, so recorded performance after that year is expected to be much better, dropping below 50%-of-benchmark.
he bar chart on the opposite page shows three years of recorded performance versus the design budget and the result of the design modeling in 2002.
The charts below show the 2011 energy use breakdown by category both annually (pie chart op- posite) and monthly (bar chart directly below)8. Note the predominance of the metered plug load and the unrecorded plug load due to energy intensive laboratory equipment installed without meters.
8 EUI based on a Building Gross Square Feet (BGSF) determined with calculation on 27 Au- gust 2007. (Source: Min Jiang, Design & Construction, UC Merced).
30.00 25.00 20.00 15.00 10.00
5.00 0.00
Heating (Gas)
Pumps
Ventilation Unrecorded Plug Load Plug Load
Lighting Cooling
UC Merced Science & Engineering Building I Measured Monthly Energy Use (2011)
Feb
2011
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec Jan
2012
Zero Net Energy Case Study Buildings: Volume 1
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kBtu/sq.ft.