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2 <br /> ORANGE COUNTY <br /> HILLSBOROUGH <br /> NORTH CAROLINA <br /> MEMORANDUM <br /> TO: Board of County Commissioners <br /> John Link, County Manager <br /> FROM: Paul Thames, County Engineer <br /> DATE: October 14, 1993 <br /> SUBJECT: Energy Use in County and public school buildings; <br /> energy improvement strategies for County buildings <br /> As per the request of the BOCC, herein is provided a summary of <br /> energy use data for County. The data are presented in several <br /> formats. The OC Public Works department, from the records of <br /> utility companies and fuel suppliers, has compiled and <br /> tabulated monthly and annual electrical and heating fuel <br /> consumption data for County buildings for the years 1988 <br /> through 1992 . These data were re-tabulated by County staff <br /> into three tables containing: 1) a summary of the annual <br /> electrical energy consumption for each building, the use per <br /> square foot of building and the percent of change per year; <br /> 2) a summary of the annual heating fuel energy consumption <br /> (converted to British Thermal Units-BTU's) for each building, <br /> the BTU consumption per square foot of building and the percent <br /> of change from the preceding year; and 3) a summary of the <br /> total annual energy consumption (in BTU' s) for each building, <br /> the BTU consumption per square foot of building (building <br /> energy ratio-BER) and the percent of change from the preceding <br /> year. <br /> Application of Data in Determining Energy Efficiency <br /> The energy consumption data provided are useful in determining <br /> the relative energy use of buildings when compared to one <br /> another. The data are also useful in terms of comparing the <br /> energy consumption of the buildings to general energy <br /> consumption guidelines and averages. The effects of factors <br /> which often impact energy consumption, including the <br /> relationship of building volume to area and building age, which <br /> has implications on the energy efficiency of heating and <br /> lighting equipment and the building envelope, can often be <br /> detected by evaluation of the data. The data are less useful <br /> in determining the overall energy efficiency of various <br /> buildings. Factors which may affect energy consumption but not <br /> energy efficiency are not apparent from review of the data. <br /> AREA CODE (919) 732-8181 • 968-4501 • 688-7331 • 227-2031 • FAX (919) 644-3004 <br /> Ext. 2300 <br />