ASHRAE Journal - January 2009 - (Page 34) Bin Weather Data Boiler Operating Cost Natural Gas Consumption Cost ($) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $9,063 $83,261 $73,539 $44,622 $34,140 $5,853 $1,566 $252,043 Chiller/Heat Net Hot Heating Hot Water Natural Gas Bin Pump Heating Water Input to OADB (°F) MCWB (°F) ECWT (°F) Heating Load Consumption Hours Capacity Heating 85% Efficient (MBH) (MBtu) (MBH) Load (MBH) Boiler (MBH) 117.5 112.5 107.5 102.5 97.5 92.5 87.5 82.5 77.5 72.5 67.5 62.5 57.5 52.5 47.5 42.5 37.5 32.5 27.5 72 71 71 70 69 67 65 62 59 55 52 49 47 44 41 37 33 28 24 80.1 78.9 78.6 77.5 76.3 74.3 72.3 69.5 66.6 62.9 59.5 57.0 55.0 55.0 55.0 55.0 55.0 55.0 55.0 2 30 184 353 473 628 680 963 827 711 638 872 791 677 486 249 165 25 6 6,928 6,894 6,826 6,836 6,773 6,681 6,565 6,497 6,333 7,341 9,544 11,757 13,975 16,193 18,382 20,538 22,678 24,780 26,853 6,928 6,894 6,826 6,836 6,773 6,681 6,565 6,497 6,333 7,341 9,544 11,757 13,090 6,690 6,690 6,690 6,690 6,690 6,690 0 0 0 0 0 0 0 0 0 0 0 0 885 9,503 11,692 13,848 15,988 18,090 20,163 0 0 0 0 0 0 0 0 0 0 0 0 1,042 11,180 13,756 16,291 18,810 21,283 23,722 0 0 0 0 0 0 0 0 0 0 0 0 823,918 7,569,198 6,685,341 4,056,553 3,103,624 532,070 142,330 Total Seasonal Boiler Operating Cost = Table 4: Boiler analysis. Bin Weather Data Bin OADB (°F) MCWB (°F) ECWT (°F) Hours 117.5 112.5 107.5 102.5 97.5 92.5 87.5 82.5 77.5 72.5 67.5 62.5 57.5 52.5 47.5 42.5 37.5 32.5 27.5 72 71 71 70 69 67 65 62 59 55 52 49 47 44 41 37 33 28 24 80.1 78.9 78.6 77.5 76.3 74.3 72.3 69.5 66.6 62.9 59.5 57.0 55.0 55.0 55.0 55.0 55.0 55.0 55.0 2 30 184 353 473 628 680 963 827 711 638 872 791 677 486 249 165 25 6 Chiller/Heat Pump Heating Capacity (MBH) 6,928 6,894 6,826 6,836 6,773 6,681 6,565 6,497 6,333 7,341 9,544 11,757 13,090 6,690 6,690 6,690 6,690 6,690 6,690 Chiller/Heat Pump Operating Cost Chiller/ Heat Pump Power (kW) 636 634 630 630 627 622 615 611 582 677 796 968 1,076 580 580 580 580 580 580 Chiller/ Heat Pump Electrical Use (kWh) 1,272 19.015 115,905 222,559 296,493 390,306 418,048 588,250 481,314 481,347 507,848 844,096 851,116 392,660 281,880 144,420 95,700 14,500 3,480 Blended Electrical Use Rate ($/kWh) 0.073 0.073 0.073 0.073 0.073 0.073 0.073 0.067 0.067 0.067 0.067 0.067 0.067 0.067 0.067 0.059 0.059 0.059 0.059 Chiller/ Heat Pump Operating Cost ($) $93 $1,396 $8,507 $16,336 $21,763 $28,648 $30,685 $39,119 $32,007 $32,010 $33,772 $56,132 $56,599 $26,112 $18,745 $8,463 $5,608 $850 $204 $417,049 Total Seasonal Chiller/Heat Pump Operating Cost = Table 5: Heat pump analysis. 34 ASHRAE Journal ashrae.org January 2009 http://www.ashrae.org
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