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Roseville Skating Center and City Hall <br />Feasibility Study September23,2007 <br />� Ice Arena f Banquet Hall Energy Balance (2006) I <br />�qr,,r,�y,� <br />150,00(1 -- <br />1�000 <br />50, DC30 <br />0 <br />� <br />Jan Feb N�ar Apr May Jvn Jul Aug Sep OcF Nov Pec <br />—Thermal Energ_y From Ice p��s E[eetrical Eneray -� SPace Heatin� Eneray Used in E3uildinq <br />� <br />Figure 16: This graph illustrates the relative amount of thermal energy dissipated to the outdoor <br />air through the cooling tower compared to the amount of natural gas burned to provide space <br />heating and service hot water in the Ice Arena / Banquet Hall over one year. There are only two <br />months in which the amount of energy dissipated by the cooling tower is /ess than the amount of <br />thermal energy needed to heat the facility. <br />Over an entire year the amount of energy dissipated through the cooling tower <br />connected to the refrigeration system in the [ce Arena is significantly greater than the <br />total amount of energy required to provide space heating and service hot water. Figure <br />17 illustrates the relative amounts of energy dissipated by the refrigeration plant and the <br />amount needed in the building to provide space heating and hot water. <br />[ce Arena 1 Banquet Hall Energy Balance (2006) <br />�.xo:_�'� -- • �---- <br />� G�.+�� - i€n`_n�. �: _ :� •L—L- <br />YL� � �� p•1Jf�• •• �• ,7 <br />iV� .__.. YF$N� ..{. � <br />� ��.'rv 5+�� /�eM1l� <br />�}' �YAJ.�A � <br />� 1 ��} � �� . . ' O <br />s • "'c � <br />— �. '' �;✓•�:��; <br />� �� <br />a � • �;� . . • ;>�.. <br />� ,. �. :�. �.:.��.� <br />� � � � � <br />� '��3c� _�.._o-�d�,' <br />w:n.:n, ._. . „�«'��'.� "`�� <br />�.�.`�'�� �.r.° '� * <br />., �, <br />: � ,{ li <br />} � _��_.�_ S:. _ _? �Y.: ¢�'• <br />Thermai Energy Dissipated by IOE Arena Cooling Tower <br />r <br />—�-----� <br />I <br />� .."_ .t <br />IY�:M1$id.: ../'�. �;.> <br />�.�, }y�.���'� :,',' �• <br />; �n ' ���' �A,�:r i <br />::� �; .�..�. <br />�����;�;•�.� ��;,�•::�,.�{� <br />�Y}x�#�' .:� }.fl :I <br />;�ti•s .:�c . <br />�1EI17k'� Energy Requited for Space 8 Water Heating <br />Figure 17: The total amount of thermal energy dissipated through the cooling tower at the lce <br />Arena is approximately 1.9 times greater than the amount of thermal energy needed to provide <br />space heatingand producinghot waterforshowersand resurfacingthe ice. <br />The refrigeration system for the lce Arena is in operation every month of the year to <br />maintain the ice temperature. Thermal energy is removed from the ice surface almost <br />Geo-Xergy Systems Page 16 of 33 <br />