Agenda - 10-19-1993 - VII-B - Laserfiche WebLink

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4 BOCC Page 3 October 14, 1993 majority of peak consumption can be attributed to air conditioning. Four buildings fall noticeably outside the normal pattern. Whitted' s summer use is only twenty percent higher than winter, a reasonable outcome in that its heating- A/C system operates by mixing heated and cooled air on a year round basis. During the summer, the Collins building typically consumes twenty times more electricity than it does in winter. This consumption pattern may result from the use of a very inefficient air conditioning system. The Motor Pool ' s monthly electrical consumption does not show significant seasonal variation because it is essentially without air-conditioning. The Moody building uses significantly more power in the winter than in summer. Locally, given heating and A/C units of similar efficiency such as a heat pump unit, heating generally consumes less power than air conditioning. Moody' s electrical consumption pattern may indicate significant inefficiencies in its heating system. Those buildings with the greatest total monthly and annual electrical consumption, Whitted, Jail, New Courthouse and Planning, are also among the County' s larger buildings. Heating Energy consumption analysis - County buildings Data for heating energy consumption are much more straight forward that electrical energy consumption data. Although some heating fuel energy is generally consumed year round for water heating, as much as ninety percent of total heating fuel energy consumption is for space heating. The heating energy consumption data for County Buildings show a general decline in consumption for 1989-90. The exceptions to this pattern are the Animal Control, Gym, Public Works Administration and Whitted buildings. Each of these buildings except Whitted show increases because 1990 consumption rates are compared to partial year consumption data for 1989. The cause of the Whitted building' s fifty-five percent rise is unknown. The data show a general increase in heating energy consumption in the years 1991-92. Those buildings demonstrating the largest per square foot demand for energy include the Whitted, Collins, Motor Pool and Government Services Annex buildings. The Motor Pool is basically a poorly insulated metal shell building which operates with its large garage-type doors open throughout much of the year, factors contributing to significant heat loss and resulting heat demand. The Collins building appears to have an inefficient heating system. The Whitted building has high ceilings and thus a higher than normal volume when compared to other buildings on a per square foot basis. Its larger volume of air to be heated (or cooled) , and its heating/air-