Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations Maintenance (OM)

摘要

In most chiller and boiler central plants, theenergy management and control systems (EMCS)monitor and record key operation parameters andenergy production continuously. A method wasdeveloped to identify potential O&M savings byusing the EMCS recorded data. This method wasapplied to a central plant which supplied heating andcooling to a University Campus with a total buildingfloor area of 3.5 million square feet. It was found thatthe potential savings from improved O&M were$2,65 1,00O/yr which included $1,934,000/yr fromimproved 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 orpartially implemented in a number of buildings. Themeasured O&M savings ($610,00O/yr or 22.5%) wereconsistent with predicted savings in five buildingswhere the LoanSTAR program measured both pre-O&M and post O&M energy consumption on ahourly basis. The savings from implemented chillerand boiler O&M improvements need to be evaluatedusing the EMCS data.