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Rasc��i1[� Skating Center and City Hall <br />Feasibility Study September 23, 2007 <br />I The refrigeration system for the speed skating oval operates from l�ovemb�r to the end <br />� of February each year and rejects heat to the outside air through a cooling tower. <br />3 Figures 2 and 3 show a comparison of energy consumption and energy cost in the <br />�I buildings in 2006. <br />� <br />b <br />� <br />S <br />� <br />� �J <br />� �� .�. <br />� ��� <br />� <br />� <br />s ��m <br />� . . <br />� � <br />p �.�� <br />� <br />. <br />� �}� <br />All Buildings Energy Consumption ��Q3i�6} <br />!ce Arena Oval Ciy Fial Mat Garage E=iteMal€ <br />0 Electricity kWh ❑ Natural Gas - Equivalent kWh <br />Figure 2 Comparison of the totai energy consumption of the five facilifies on the City Hall <br />campus. E/ectricity use is shown in kilowatt hours (kWhj and natural gas consumption is shown in <br />equivalent kilowatt hours (�kWh} <br />E s+�s,am <br />G 7 V: L`" <br />S � `. 744 <br />�� <br />��: <br />Annual Energy Cost�orAll Buildings (200� <br />� 1csArena Oval City liail Maint, Garage �'irehall <br />�,` I 0 Electricity Cost 0 Naturai Gas Cost + <br />�� Figure 3: Comparison of the total energy cost of the five facilities on the City f�'��� campus. The <br />9 3 current cost of natural gas per unit of energy is lower than the cost of e/ectricity per unit of energy. <br />1� <br />95 3.?. I�� Ar�rt� ���d �ar�c��et H�11 <br />t6 <br />�� Ice is maintained in the arena almost twelve months per year and the refrigeration <br />]� system uses the most significant portion of the electrical consumption for this building. <br />1� The electrical consumption is relatively consistent from 80,000 to 115,000 k�r'��f7 per <br />��r month. Since natural gas consumption is primarily based on space heating needs, the <br />Geo-Xergy Systems Page 6 of 33 <br />