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ENERGY MANAGEMENT REPORT SEPTEMBER2008 CITY OF SAN MARCOS <br />INSTALL ENERGY MANAGEMENT SYS'T'EM (EMS) <br />Install or Upgrade existing Direct Digital Control (DDC) Energy Management System (EMS) to <br />provide optimum scheduling and precise temperature supervision for the HVAC systems <br />throughout each facility. The EMS will minimize the run time of the units while maintaining <br />comfort throughout the facility. Additionally, EMS can remotely diagnose and document.HVAC <br />maintenance problems. The EMS system proposed in the estimation below will have basic <br />functions such as remote access capabilities, multiple scheduling, and optimum start/stop <br />features. The table below sumrarizes the estimated cost and saving for these projects. <br /> EMS UPGRADES AND INSTALLATION <br /> <br /> <br />Building <br />Estimated <br /> <br />letnentation Cost <br />Imp Estimated <br />Annual <br />Savings <br />Payback <br />(years) <br /> Grant Harris B uilding $10,000 $800 12.5 <br /> Activity Center $62,000 $5,100 12.2 <br /> Library $22,000 $1,500 14.7 <br /> City Hall $18,000 $1,300 13.8 <br />3 f, Public Works Bldg. $10,000 $800 12.5 <br />t Police Headquarters $140,000 $11,200 12.5 <br /> Municipal Bldg, See Capilal Improvenient Projects Section 8.© <br />r` <br />A=' TOTAL. $262,000 $20,700 1217 <br />BUILDING COMMISSIONING <br />Commissioning (Cx) for a facility is a quality assurance process to verify and document that the <br />building systems function as designed and more importantly, that it meets the operational needs <br />of the building users. Preliminary examination (snap shot data logging, discussion with staff, <br />review of plans and walkthrough) of the facility indicates potential for energy cost savings <br />primarily in the HVAC. Since the facility is already constructed, commissioning services will <br />focus on HVAC systems operations and control system optimization. The duration of the project <br />is anticipated between 6 - 8 months, which will include documenting existing conditions, and <br />tracking and documenting progress. The table below summarizes the estimated costs and savings <br />for this project. <br />BUILDING COMMISSIONING <br />Estirnaterl <br />Estimated Annual Payback <br />Building Implementation Cost Savings (yews) <br />Police Headquarters $36,000 $9,000 4.0 <br />TOTAL $36,000 $9,000 4.0 <br />LOCAL GOVERNMENT ENERGY NJANAGLMENT t'ROGRAM_.__ ...._ PAGE 18