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TCAAP Energy Integration Resiliency Framework Policy White Paper – Exhibit I - Definitions 67 Energy Utilization Index (EUI) – Measure of the total energy consumed in cooling or heating of a building or facility in a period, expressed as British thermal unit (Btu) per (cooled or heated) gross square foot. Equivalent Full Load Hours – Annual energy usage divided by the peak capacity used. Fixed Operations and Maintenance (FOM) – Costs other than those associated with capital investment that do not vary with the operation, such as maintenance and payroll. Fuel Cell CHP – Electrochemical power generation process generating both electricity and thermal energy suitable for making steam or hot water. Geothermal energy – Hot water or steam extracted from geothermal reservoirs in the earth's crust. Water or steam extracted from geothermal reservoirs can be used for geothermal heat pumps, water heating, or electricity generation. Geothermal plant – A plant in which the prime mover is a steam turbine. The turbine is driven either by steam produced from hot water or by natural steam that derives its energy from heat found in rock. Green Spine – The corridor through the Rice Creek Commons development that will be designated green space for the use of stormwater management, recreational trails, and parks. Greenhouse gases (GHG) – Those gases, such as water vapor, carbon dioxide, nitrous oxide, methane, hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulfur hexafluoride, that are transparent to solar (short- wave) radiation but opaque to long-wave (infrared) radiation, thus preventing long-wave radiant energy from leaving Earth's atmosphere. The net effect is a trapping of absorbed radiation and a tendency to warm the planet's surface. Ground Source Heat Pump – A heat pump in which the refrigerant exchanges heat (in a heat exchanger) with a fluid circulating through an earth connection medium (ground or ground water). The fluid is contained in a variety of loop (pipe) configurations depending on the temperature of the ground and the ground area available. Loops may be installed horizontally or vertically in the ground or submersed in a body of water. Heat pump – Heating and/or cooling equipment that, during the heating season, draws heat into a building from outside and, during the cooling season, ejects heat from the building to the outside. Heat pumps are vapor- compression refrigeration systems whose indoor/outdoor coils are used reversibly as condensers or evaporators, depending on the need for heating or cooling. Heating Degree Days – A degree day is the difference in temperature between the outdoor mean temperature over a 24-hour day and a given base temperature. Heating degree days occur when the outdoor mean temperature is below 65 F. Heat exchanger – A pressure vessel that contains plates or tubes and allows the transfer of heat through the plates or tubes from the district heating system water to the building heat distribution system. A heat exchanger is divided internally into two separate circuits so that the district heating system water and the building heat distribution system fluids do not mix.