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� <br />� <br />4 <br />� <br />6 <br />r <br />� <br />1G <br />11 <br />7� <br />1.� <br />14 <br />�i �7 <br />��] <br />�f <br />�� <br />� �. <br />�� <br />�'I <br />�� <br />�3 <br />�� <br />�5 <br />�� <br />�� <br />28 <br />�� <br />3D <br />�1 <br />�� <br />33 <br />� <br />3i <br />36 <br />�� <br />38 <br />39 <br />�I Ca <br />�7 <br />�� <br />�� <br />�t•: <br />�S <br />�6 <br />F�os�vil�� Skating Center and City Hall <br />Feasibility Study September 23, 2007 <br />total of 2,500 to 3,000 kWi� of thermal energy is dissipated to the outside air through the <br />cooling tower. <br />The thermal energy normally dissipated to the air has value if it can be captured and <br />used for space heating or to produce hot water for use in the arena or one of the other <br />nearby buildings. <br />�a�a ��� Arena and ������� ���� <br />The ice arena consumes approximately 1,090,500 k�f�lh of electricity and an additional <br />844,300 EkWh of natural gas annually to provide refrigeration for the ice surface, space <br />conditioning and hot water for the building. <br />Studies by Natural Resources Canada (NRCan) have shown that approximately40°/o to <br />45°/o of the total energy consumed in a typical ice arena (electricity and natural gas) is <br />used to operate the refrigeration plant' in a typical ice arena, and that a typical ice arena <br />consumes a combined total of 1,200,000 to 1,500,000 kb'�� I-,1 EkWh annually. <br />Since this building includes a significant amount of space not normally included in a <br />typical ice arena, it is estimated that 30°/o to 35°/o of the total building energy <br />consumption in this building is used to operate the refrigeration plant. The total kWl� <br />consumption of the refrigeration plant in this facility is estimated at (1,087,000 + <br />830,000) x 33°/o = 632,000 kWh. This correlates well with the research done by NRCan <br />and with similar studies completed by Geo-Xergy Systems. <br />The amount of thermal energy dissipated from the ice arena is estimated to be between <br />1,580,000 and 1,896,000 kW over the year (5,390,960,OOOto 6,469,152,000 Btu) <br />42. Speed �l�atin� �a�l <br />The electrical energy consumption at the speed skating oval totals approximately <br />860,000 k��,� annually. The base electrical load for this facility totals approximately <br />5,000 kV'� per month or approximately 60,000 k��� annually. <br />The electrical consumption of the refrigeration plant (compressors, pumps and cooling <br />tower totals approximately 800,000 kV�h annually. If the refrigeration plant is assumed to <br />operate at a coefficient of performance of 2.5 to 3.0, then it rejects an estimated <br />2,000,000 to 2,400,000 ��f�,� annually to the outdoor air through the cooling tower. <br />5. ���T�FiA fFJT��F��T��F+i 1J�1�°�i OTHER CAMPUS ��ILatN�� <br />The integration of the refrigeration system in the Ice Arena with the mechanical systems <br />in the Ice Arena � Banquet Hall facility and the mechanical systems in the other campus <br />buildings provides a significant opportuniiy to reduce energy consumption and energy <br />cost. The connection of the refrigeration system in the Speed Skating Oval to an <br />' Natural Resources Canada (NRCan): "Guidelines for Energy Efficient and Environmentally <br />Friendly Ice Rinks �or Owners, Managers and Municipal Officials"— GANMET Technology Centre, <br />Varennes, QC. Marius Lavoie — November 22, 2005 <br />Geo-Xergy Systems Page 13 of �3 <br />