This thesis compares the variability of commissioning savings and the persistence of
savings from the Normalized Annual Consumption (NAC) and standard International
Performance Measurement and Verification Protocol (IPMVP) weather normalization
approaches and from Option C and Option D of the IPMVP. Twenty-nine different
weather years were used to obtain a set of savings results under each method.
Variability of savings was quantified by the average standard deviation of the 29 percent
savings results across all post-commissioning periods for each method. For the
combined chilled and hot water savings, the average standard deviation is 0.39% savings
for Option D using the NAC weather normalization approach, 0.57% savings for Option
D using the standard IPMVP weather normalization approach, 0.71% savings for Option
C with regression models using the NAC weather normalization approach, and 0.98%
savings for Option C with regression models using the standard IPMVP weather
normalization approach.
The variability of savings persistence results deviate a little from variability of savings
results. For the combined chilled and hot water persistence of savings, the average
standard deviation across all post-commissioning periods is 0.48% persistence for
Option D using the NAC weather normalization approach, 0.55% persistence for Option
D using the standard IPMVP weather normalization approach, 0.52% persistence for
Option C with regression models using the NAC weather normalization approach, and 1.26% persistence for Option C with regression models using the standard IPMVP
weather normalization approach.
Overall, the NAC weather normalization approach shows less variability in savings and
persistence than the standard IPMVP weather normalization approach. Additionally,
Option D of the IPMVP generally shows less variability in savings and persistence of
savings than Option C with regression models.
This thesis also determines the savings and persistence of savings from commissioning
for three Texas A&M University buildings. Aggregate site savings averaged 11.4%,
16.5%, and 19.0% for the three buildings over differing periods of available data.
Persistence results for the three buildings are quite favorable, as each building shows an
increase in aggregate site savings between the first and last post-commissioning periods.
Follow-up commissioning restored and prevented degradation of savings in two of the
buildings.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-1556 |
| Date | 15 May 2009 |
| Creators | Engan, Kenneth Paul |
| Contributors | Claridge, David E. |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | electronic, application/pdf, born digital |
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