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04-13-15 Agenda, Packet & Committee Meeting Notice
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04-13-15 Agenda, Packet & Committee Meeting Notice
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4/23/2015 12:27:40 PM
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City Council - City Clerk
City Council - Document Type
Agendas
City Counci - Date
4/13/2015
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Century Center - Chilled Water Pumps <br />Install variable speed drives on CWS Pumps: <br />100 ...TOTAL CHW SECONDARY PUMP HORSEPOWER (CHWPHP) <br />100.0% ,..COMBINED LOADING PERCENT OF ALL CHW PUMP MOTORS (CHWPLOAD) <br />85.0% ...COMBINED EFFICIENCYOF ALL CHW PUMP MOTORS (CHWPEFF) <br />739 ...TOTAL PUMP RUNTIME HOURS (PUMPHRS = HVACHRS /168 *CHPY) <br />15% ...PERCENT OF HOURS OPERATION AT 100% (100 %HRS) <br />30% ...PERCENT OF HOURS OPERATION AT 90% (90 %HRS) <br />25% ...PERCENT OF HOURS OPERATION AT 80% (80 %HRS) <br />20% ...PERCENT OF HOURS OPERATION AT 70% (70 %HRS) <br />10% ...PERCENT OF HOURS OPERATION AT 60% (60 %HRS) <br />0% ...PERCENT OF HOURS OPERATION AT 50% (50 %HRS) <br />0% ...PERCENT OF HOURS OPERATION AT 40% (40 %HRS) <br />0% ...PERCENT OF HOURS OPERATION AT 30% (30 %HRS) <br />100% ...SUM OF PERCENT OF HOURS OPERATION <br />(Current) (CHWPHP *0.746 KW /HP /CHWPEFF) *CHWPLOAD *PUMPI 240,405 KWH <br />(Retrofit) (CHWPHP /CHWPEFF *.746 KW /HP) *CHWPLOAD *((1.0 *(100 %HRS *CHWPHRS))+ <br />(.9A2.5 * (90 %HRS * CHWPHRS)) + (.8A2.5 * (80 %HRS * CHWPHRS)) + <br />(.7A2.5 * (70 %HRS * CHWPHRS)) + (.6A2.5 * (60 %oHRS * CHWPHRS)) + <br />(.5 -2.5 * (50 %HRS * CHWPHRS)) + (AA2.5 * (40 %HRS * CHWPHRS)) + <br />(.3A2.5 * (30 %HRS * CH WPHRS))) __________________ 152,301 KWH <br />88,104 KWH <br />104 <br />
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