空壓機8-提供戶外空氣給空氣壓縮機

?????????????????????????? Annual Savings Project Simple Resource CO2 (lb) Dollars Cost Payback Electric Demand 12.6 kW $2,127 Electric Use 74,835 kWh 172,121 $2,021 Net $4,148 $200 1 months ?? ???????? 50hp ????????????????????????? ?/?????????????????????????????????? ?(80-90%)??????????????? ?? A.?????????????????????????????????? ?????????????????????????? B.?????????????????????????????????? ??????????????????????? ??????????????????????????????????? ??????????????????????????????????? ??????????????????????????????????? ??????????????????????????????????? ??????????????? ??????????????????????????????????? ??????????????????????????????????? ?????????????????????????????????? ??????????????????????????????????? ??????????? ???? ?? A ????????????????????? 30 oF????????? 55 oF ?????????????? 50hp ???????? 90%??????? 89%? ??????????????? 20 ???????? 5 ??????????? ???????????? 5 days/week x 20 hours/day x 51 weeks/year = 5,100 hours/year 50 hp x 90% x 0.746 kW/hp / 89% = 37.7 kW 37.7 kW x 5,100 hours/year = 192,270 kWh/year ??????????????????????(Phi)???????? (Plow) ??? Fractional Savings = (Phi - Plow) / Phi ???????????????????????????? Fractional Savings = (Thi - Tlow) / Thi Fractional Savings = [(85 + 460) R - (55 + 460) R] / (85 + 460) R = 5.5% ????????? 192,270 kWh/yr x 5.5% = 10,575 kWh/yr 10,575 kWh/yr x $0.027 /kWh = $286 /yr ?? B ??????????????? 1/8”?????????? 1/16”?????? ????????????????????Compressed Air Systems, DOE/CS/40520-T2?????????? 4scfm ?????????????? ????? 16scfm ??????????????????????? 3.96scfm? ?????????????????? 25%????????? 75%???? Size of Hole scfm/hole hp lost 1/8“ 15.86 3.97 1/16” 3.96 2.97 1/32” 0.99 0.99 ??????????? 18 ????? 3,050 ??????????????? ???? 5 ???????????? 20 ????????????????? 3,050 parts/day / 18 hours/day / 60 minutes/hour @ 3 parts/minute 3 parts/min x 5 blow-offs/part x 20 sec/blow-off x 16 scfm / 60 sec/min = 80 scfm ?? 4scfm ??????????????????????? 80 scfm / 4 scfm/hp = 20 hp ????????????? 75%???? 15hp??????????????? 15 hp x 0.746 kW/hp / 89% = 12.6 kW 12.6 kW x $14.07 kW/ month x 12 month/year = $2,127 /year 12.6 kW x 5,100 hour/year = 64,260 kWh/year 64,260 kWh/year x $0.027 /kWh = $1,735 /year ??????? A ? B ??????? $286 + $2,127 + $1,735 = $4,148 /yr ?????? ?????????????????????????????200????? ??????????????????????????????????? ???????????????????????? ??????? Simple payback = $200 / $4,148 /yr savings x 12 months/year = 1 month ?? : 1. ?? 4scfm/hp ??????? 50hp ???????? 200scfm???? 80scfm ???????????????????? 80-90%?????????? ?????????????????????????????????? ?????????????????????????????????? ?????????????????? 2. ??????????????????????????? 60%? 70%?? ?????????????????????????????????? ????????????????????????????????? ?????????????????????????????????? ??????????????????? ?????????????????????????????????? ??????????????????????????????????? ????????????????