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Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance (O&M)
Abstract
In most chiller and boiler central plants, the
energy management and control systems (EMCS)
monitor and record key operation parameters and
energy production continuously. A method was
developed to identify potential O&M savings by
using the EMCS recorded data. This method was
applied to a central plant which supplied heating and
cooling to a University Campus with a total building
floor area of 3.5 million square feet. It was found that
the potential savings from improved O&M were
$2,65 1,00O/yr which included $1,934,000/yr from
improved AHU operation on the campus,
$673,00O/yr from improved chiller operation, and
$44,00O/yr from improved boiler operation.
The improved AHU operations were fully or
partially implemented in a number of buildings. The
measured O&M savings ($610,00O/yr or 22.5%) were
consistent with predicted savings in five buildings
where the LoanSTAR program measured both pre-
O&M and post O&M energy consumption on a
hourly basis. The savings from implemented chiller
and boiler O&M improvements need to be evaluated
using the EMCS data.
Citation
Liu, M.; Zhu, Y.; Claridge, D. E. (1996). Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance (O&M). Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /6666.