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<br />EXHIBIT D <br />FACILITY OPERATING PARAMETERS & <br />UTILITY SAVINGS CALCULATION METHODS <br />Building Envelope: <br /> <br />BLDG # - Ice Arena <br />Monthly Sav <br />Building Envelope Solutions Calculations. <br />Customer City of Elk River <br /> <br />Wind Speeds averaged <br />Elk River Ice Arena <br />Revision B <br />Wind Pressure Factor C <br />1000 School St. NW <br />price <br /> <br /> <br /> <br />AIR LEAKAGE: <br />Feet <br />Gap Sq. Ft. <br /> <br />Ext. Door(s) to be weather-stripped 240 1/8 2.50 sq ft <br /> <br /> <br /> Over-head Door(s) to be sealed on 40 1/8 0.42 sq ft <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Total 2.92 sq ft <br />sq meter <br />0.27 Density of Air (lbm/ft^3 <br /> <br /> <br /> <br /> <br />Values, Constants, Assumptions. <br /> <br />Electrical rates $0.080 per kwh 0% % of building using electric heat or heat pump <br /> <br /> <br />Natural Gas Rate $0.800 per therm 100% % of building using Natural Gas <br /> <br />Propane Fuel Rate $0.000 per therm 0% % of building using Propane <br /> <br /> <br />Fuel Oil Rates $0.000 per therm 0% % of building using Fuel Oil <br /> <br /> <br /> <br />Building K 145 <br />K is a factor determining building style, ranging from 100 to 150. <br /> <br /> <br /> Low K is very efficient with central mass, high K is open ware house or <br />Total HDD ( F ) 8,760.3 <br /> <br />many wings. <br />Total CDD ( C ) <br />1,227.6 <br /> <br /> <br /> <br />Elec Heat COP <br />1.0 <br /> <br /> <br />% of building cooled 100% <br /> <br /> <br />% <br />% mechanical EFF. <br />80% <br />This factor i s the anticipated variation of a mechanical efficiently of 80 <br />Cooling COP 2.50 <br />Coefficient of Performance for Air Conditioning or Geo-Thermal. <br /> <br />Calculations <br /> <br />Non-Electric Heat Loss = ( (Bldg Leakage sq mtrs) x (bldg k factor) x (Wind P Factor) x (HDD) x (9/5) x 0.075 x .243 x 60 x 24 ) / (100,000 <br />Electrical Heating Loss = ((Bldg Leakage sq mtrs) x (bldg k factor) x (Wind P Factor) x (HDD) x (.075 x .243 x 60 x 24) x (conversion to k <br />Cooling Loss = ((Bldg Leakage sq mtrs) x (bldg k factor) x (Wind P Factor) x (CDD) x (.075 x .243 x 60 x 24) x (conversion to kwh) <br /> <br />Annual Cost of Leakage: 1549.7 Therms <br /> <br />Kw h <br />Annual Cost of Leakage: 1747.0 <br /> <br />EXHIBIT D Page 5 of 27 <br /> <br />