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Heat Pump Replacement Savings <br />Average Bin <br />Cooling <br />Temp, deg F <br />Bin Hours <br />System <br />Cooling <br />Cooling <br />(From <br />(From <br />Load <br />System <br />System <br />"Weather <br />"Weather <br />Factor <br />Output, <br />Load, ton - <br />Data") <br />Data") <br />(HSLF <br />tons <br />Ins <br />92.5 <br />48 <br />90% <br />130 <br />6242 <br />87.5 <br />173 <br />70% <br />101 <br />17499 <br />82.5 <br />368 <br />50% <br />72 <br />26588 <br />77.5 <br />568 <br />30% <br />43 <br />24623 <br />72.5 <br />873 <br />10% <br />14 <br />12615 <br />Annual cooling system load (ACSL) <br />87,567 ton-hrs <br />Sum of bin cooling system loads in above table <br />Annual electrical energy used for cooling (ACE) <br />131,351 kW-hrs <br />= ACSL x CSE <br />Number of cooling months (CM) <br />6.5 <br />= sum of cooling bin hours/(8760 x 46/52 x 5/7 e SO/168) x 12 <br />Average cooling system load factor (ACSLF) <br />30% <br />weighted average load factor from above table <br />Ave monthly cig system power draw (AMCSPD) <br />64.7 kW <br />ACSLF x CSC x CSE <br />Annual cooling system demand (AHSD) <br />421 kW <br />= AMCSPD x CM <br />C. Post Operation <br />Heating system capacity (HSC) 3,639,000 BTU/hr Based on 4 50 MBH heating sections <br />Average heating system COP (HCOP) 5.9 Typical average value for newer heat pumps; verify during 1GA <br />The heating system load is given by HSLF x HSC x Bin Hours/1000000, where HSLF is given by 1.33 - 0.022 x Bin Temp. <br />Average Bin <br />Temp, deg F <br />(From <br />"Weather <br />Data") <br />Bin Hours <br />(From <br />"Weather <br />Data") <br />Heating <br />System <br />Load <br />Factor <br />HSLF <br />Heating <br />System <br />Output, <br />Btu/hr <br />Heating <br />System <br />Load, <br />MMBTU <br />57.5 <br />642 <br />4% <br />135,189 <br />86.79 <br />52.5 <br />656 <br />11% <br />402,655 <br />264.14 <br />47.5 <br />609 <br />18% <br />670,122 <br />408.10 <br />42.5 <br />488 <br />26% <br />937,589 <br />457.54 <br />37.5 <br />697 <br />33% <br />1,205,055 <br />839.92 <br />32.5 <br />754 <br />40%" <br />1,472,521 <br />1110.28 <br />27.5 <br />532 <br />48% <br />1,739,988 <br />925.67 <br />22.5 <br />256 <br />55% <br />2,007,454 <br />513.91 <br />17.5 <br />248 <br />63% <br />2,274,921 <br />564.18 <br />12.5 <br />118 <br />70% <br />2,542,387 <br />300.00 <br />7.5 <br />90 <br />77% <br />2,809,854 <br />252.89 <br />2.5 <br />70 <br />85% <br />3,077,320 <br />215.41 <br />-2.5 <br />13 <br />92%" <br />3,344,787 <br />13,612,253 <br />43.48 <br />-7.5 <br />6 <br />99% <br />21.67 <br />Annual heating system load (AHSL) <br />6,004.00 MMBR Sum of bin heating system loads in above table <br />Annual electrical energy used for heating (AHE) <br />298,250 kW-hrs <br />= AHSL x 1000000/HCOP/3412 <br />Number of heating months (HM) <br />5.5 <br />= sum of heating bin hours/(8760 x 44/52 x 5/7 * 50/168) x 12 <br />Average heating system load factor (AHSLF) <br />32% <br />weighted average load factor from above table <br />Ave monthly htg system power draw (AMHSPD) <br />57.6 kW <br />= AHSLF x HSC/HCOP/3412 <br />Annual heating system demand (AHSD) <br />317 kW <br />= AMHSPD x HM <br />Cooling system capacity (CSC) <br />48 tons <br />Cooling system efficiency (CSE) <br />0.92 kW/ton <br />Typical value for newer heat pumps <br />The cooling system load is given by CSLF x CSC x Bin Hours, where CSLF is given by -2.8 + 0.04 x OAT <br />3.25 <br />