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GLOSSARY <br /> Btu: measure of heat equal to the amount of energy required to raise one pound of water one degree <br /> Fahrenheit. [British thermal unit] <br /> coefficient of performance (COP) - cooling: the ratio of the rate of heat removal to the rate of energy <br /> input, in consistent units, for a complete refrigerating system or some specific portion of that system <br /> under designated operating conditions. <br /> coefficient of performance (COP), heat pump-heating: the ratio of the rate of heat delivered to the <br /> rate of energy input, in consistent units, for a complete heat pump system, including the compressor and, <br /> if applicable, auxiliary heat, under designated operating conditions. <br /> demand: the highest amount of power(kilowatts) consumed by a building or facility. <br /> energy efficiency ratio (EER): the ratio of net cooling capacity in Btu/h to total rate of electric input in <br /> watts under designated operating conditions. [See coefficient of performance (COP) - cooling.] <br /> GPM: gallons per minute. <br /> heat pump: one or more factory-made assemblies that normally include an indoor conditioning coil, <br /> compressor(s), and an outdoor refrigerant-to-air coil or refrigerant-to-water heat exchanger. These units <br /> provide both heating and cooling functions. <br /> kilowatt(kT�: the basic unit of electric power. Equal to 1000 W. <br /> kilowatt-hour(kWh): the basic unit of electric energy. Equal to 1000 Wh. <br /> rated R-value of insulation: the thermal resistance of the insulation alone as specified by the manufac- <br /> turer according to recognized trade and engineering standards in units of h•ftz•°F/Btu (m2•K/W) at a <br /> mean temperature of 75°F (24°C). Rated R-value refers to the thermal resistance of the added insulation <br /> in framing cavities or insulated sheathing only and does not include the thermal resistance of other <br /> building materials or air films. (See thermal resistance.) <br /> thermal resistance(R-value): the reciprocal of the time rate of heat flow through a unit area induced by <br /> a unit temperature difference between two defined surfaces of material or construction under steady- <br /> state conditions. Units of R are h•ft�•°F/Btu (m��K/W). <br /> ton: measure of heat removal capacity equal to 12,000 BTUH, derived from quantity of heat required to <br /> melt one ton of ice in a 24 hour period. <br /> 005.10.01 Page 18 of 18 City of Orono <br /> May 28,2010 Geothermal HVAC Feasibility Study <br /> engineers � consultants � commissioning <br /> MEP Associates, LLC� 7607 Equitable Drive,Eden Prairie,MN 55344�phone:952.224.4488 fax:952.224.4489�www.mepassociates.com <br />