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1 KWTON is the efficiency of the entire Chilled Water plant (DX Units).23.6937=5.5454 BTU/lb of dry air) -ft elevation. (29.2391ENTHALPHY is the difference in enthalpy of Mixed Air (76F <br /> db, 50% RH) and Discharge Air (55F db, Saturated). 1240 HEATCOST is the rate of heating BTU. peak hours.-ELECCOST is the rate of electricity during offaddition of Supply Fan and Return <br /> Fan energy. Measured KW is the 5 4 3 2 <br /> <br />EXHIBIT D <br />FACILITY OPERATING PARAMETERS & <br />UTILITY SAVINGS CALCULATION METHODS <br />Ice Arena (Turf AHU Replacement): <br />Ice Rink (Turf Area) Unit Replacemetn <br /> <br /> <br />Energy Calculations - Optimum and Schedule Start/Stop Strategy <br />HVACHRS HRSOCC BASELINE PROPOSED SAVINGS <br /> <br />SUPPLY O.A. Measured Baseline Proposed Savings Fan Energy Ventilation Cooling Fan Energy Ventilation Cooling Fan Energy Ventilation Cooling <br /> <br />AHU # AREA SERVED CFM CFM KW Hrs/Wk Hrs/Wk Hrs/Wk KWH Therms KWH KWH Therms KWH KWH Therms KWH <br /> <br />MAU-1 Dehumid Unit 12000 4,000 11.75 168.0 0.0 0 102,644 9,165 0 0 0 0 102,644 9,165 0 <br /> <br />MAU-2 New Cooling 17303 7,800 11.00 0.0 105.0 -105 0 0 0 60,079 8,936 53,497 -60,079 -8,936 -53,497 <br /> <br /> <br />TOTAL 102644 9165 0 60079 8936 53497 42565 229 -53497 <br />Assumptions <br /> <br /> <br />VARIABLES CALCULATIONS <br />FAN ENERGY (KWH/YR.) <br />See Table Above ...PRESENT HRS/WK OF SYSTEM OPERATION (HVACHRS) <br />See Table Above ...HRS/WK OF ACTUAL BUILDING OCCUPANCY (HRSOCC) = FANKW * HVACHRS * WPY <br />0 ...HRS/WK OF SCHEDULED FOR WARMUP/COOLDOWN (WUCD) <br /> <br />FAN ENERGY COST ($/YR.) <br />52 ...WKS/YR OF AIR SYSTEM OPERATION (WPY) <br />See Table Above …Measured KW / Data Logger KW (FANKW) = FAN ENERGY * ELECCOST <br />...ELECTRICITY UNIT ($) COST/KWHR (ELECCOST) <br /> <br />VENTILATION (BTU/YR.) <br />4977 ...HEATING HRS/YR FROM WEATHER DATA (HHPY) <br />See Table Above ...TOTAL SUPPLY FAN CFM (CFM) = HVACHRS * (HHPY/168) * OACFM * 1.08 * (HTSPUNOC-AVEDBT) <br />See Table Above …TOTAL OA CFM (OACFM) <br /> <br />62 ...UNOCCUPIED HRS. SPACE HEATING SETPOINT (HTSPUNOC) VENTILATION COST ($/YR.) <br />27.9 ...AVERAGE O.A. TEMP. DURING HEATING SEASON (AVEDBT) = VENTILATION COST * HEATCOST <br />80% Heating Eff <br /> <br />1.4 …CHILLER EFFICIENCY IN KW/TON (KWTON) COOLING (KWH/YR.) <br />2462 ...COOLING HRS/YR FROM WEATHER DATA (CHPY) = (HVACHRS * CWPY * OACFM * 4.5 * ENTHALPY / 12,000) * KWTON <br />14.65 ...COOLING WEEKS PER YEAR (CWPY) = (CHPY/168) <br /> <br />8.49 …COOLING ENTHALPY DELTA (ENTHALPY) COOLING COST ($/YR.) <br /> <br />= COOLING COST * ELECCOST <br /> <br /> <br /> <br /> <br />Savings Summary: <br />kWh: (10,933) <br />kW: 0 <br />Therms: 229 <br />EXHIBIT D Page 12 of 27 <br /> <br />