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Executive Summary Table ES-1. Identified Energy-saving Measures and Potential Savings Max Simple Demand Energy Cost Payback Benefit / Savings Savings Savings Investment Period Cost Measures (KW) (KWH) (US$/Year) (US$) (Months) Relation CATEGORY 1: Low-cost/No-cost Measures (Operations & Maintenance) Selection of optimum tariff in collection plant - - 23,382 0 - - Selection of optimum tariff in treatment plant - - 8,331 1,300 - - Operational control of pumping equipment - - 864 - - - Pump basic maintenance 151 587,520 15,149 0 - CATEGORY 2: Medium Term Measures Installation of Reactive Power Compensation System ( capacitors) 65,466 52,000 10 Pumps major maintenance 127 625,802 30,805 33,054 13 Total savings 1+2 278 1,213,322 143,997 86,354 7 CATEGORY 3: Long-tem Measures Generation plant for self-generation in peak hours Substitution of two conventional motors (125 HP each) by high-efficiency ones Replacement of ASTHOM BELFORT motor (500 KW) from collection plant 4 ENERGY EFFICIENCY STUDY IN EL ARENAL DRINKING WATER PRODUCTION FACILITY 255,000 7 years 4 64,756 2,686 9,100 4.4 years 2.21 78 373,638 20,717 100,000 4.8 years 1.54 Total savings 3 82 438,394 23,403 364,100 4.4–7 years Total savings (1 + 2+3) 359 1,651,717 167,400 450,454 2.7 years Reference (total 2004 demand, power consumption...) 3,014 17,958,785 612,694 Savings percentage 11.9 9.2 27.3 CONCLUSIONS • The energy analysis of the El Arenal drinking water production system equipment and installations showed that the general conditions of these old installations (with some motor changes) varies from average to bad, as evidenced through low efficiencies, mainly in pumps (see Actions Matrix: Diagnostic of Installations). • The analysis of potential improvements, shown in Table ES-1: Identified Energysaving Measures and Potential demand, energy and cost Savings, identified a number
of low-cost, short-term investment measures that could be implemented by EPS Grau. The table also lists medium investment improvements that EPS Grau could carry out. The analysis identified only one longer-term measure: self-generation in peak hours. • Implementing all the measures listed in the table above would result in total cost savings of 27.3 percent, with an investment of $450,000. However, a more attractive program would be to implement only low-cost/no-cost and medium term measures at this time, because they would lead to cost savings of 23.5 percent at an investment cost of only $86,354 and an average payback period of 7 months. MAJOR RECOMMENDATIONS Implementing first the low cost and medium investment measures would mean to carry out the following actions: • As the first priority, implement a small maintenance program for the pumps. Electricity consumption will be reduced by up to 3.3 percent, representing a cost saving equivalent to 7.8 percent. • Concurrently with the previous measure, EPS Grau should negotiate an electricity tariff change with ENOSA (from MT3FP to MT2) in Collection Plant (Feed line Nº 12517661) and, likewise, move from tariff BT3FP to BT5A in Treatment Plant (Feed line N° 12517670). These changes will allow a financial saving of up to 5.2 percent of the current electricity bill. • In the very short term, implement operational control of the pumping equipment. • Install capacitors at all major pumping stations. • Replace the two 125-HP motors from Old Plant Pumping Station with others having the same capacity but higher efficiency; likewise, replace the 500-KW ALSTHOM BELFORT motor from the collection plant. At this time, a major maintenance activity is not justified. • Institute a routine maintenance program on pumps throughout the system, with a special emphasis on the largest ones. OTHER RECOMMENDATIONS To ensure continuity and sustainability of an energy-efficiency culture at the facility, we recommend two additional management actions. The first is to establish an ongoing energy-monitoring system; the second is to establish an energy committee within EPS Grau that would routinely assess energy consumption and cost patterns and make recommendations for further improvements in plant energy efficiency and energy cost containment. FINAL NOTE If the recommended program is implemented, the El Arenal Paita facity would become more attractive to future Private Sector Providers because its specific costs of electricity per cubic meter would get closer to the regional average. In addition, the future concessionaire will have the opportunity to implement additional capital-intensive projects that could bring the energy performance in line with the best performance in the region. Executive Summary The analysis of potential improvements identified a number of lowcost, short-term investment measures that could be implemented by EPS Grau. ENERGY EFFICIENCY STUDY IN EL ARENAL DRINKING WATER PRODUCTION FACILITY 5
Page 1 and 2: ENERGY EFFICIENCY STUDY AT EL ARENA
Page 3: ENERGY EFFICIENCY STUDY AT EL ARENA
Page 6 and 7: Contents 6 Final Results...........
Page 8 and 9: Contents LIST OF TABLES Table ES-1.
Page 11 and 12: EXECUTIVE SUMMARY The El Arenal-Pai
Page 13: saving measures in medium-sized wat
Page 18 and 19: Introduction The IDB sought to iden
Page 20 and 21: Introduction Step 1 Step 2 Step 3 S
Page 23 and 24: 2 GENERAL INFORMATION ABOUT THE FAC
Page 25 and 26: 2.3 DESCRIPTION OF THE FACILITY Thi
Page 27 and 28: 2.4 OPERATION REGIME The production
Page 29 and 30: 3 ENERGY SUPPLY AND DISTRIBUTION 3.
Page 31 and 32: 3.4 ENERGY HISTORICAL CONSUMPTION A
Page 33 and 34: 4 INSTITUTIONAL ANALYSIS 4.1 THE PL
Page 35 and 36: 5 DESCRIPTION AND ANALYSIS OF THE I
Page 37 and 38: Description and Analysis of the Imp
Page 39 and 40: 5.4 SUBSTITUTION OF CONVENTIONAL MO
Page 45: Description and Analysis of the Imp
Page 48 and 49: Final Results The analysis of poten
Page 50 and 51: Final Results • Get commitment fr
Page 52 and 53: Annex I ENERGY ANALYSIS OF ELECTRIC
Page 54 and 55: Annex I Table A1-9. Motor - Pump #2
Page 56 and 57: Annex I EL ARENAL PUMPING STATION T
Page 58 and 59: Annex I 10-inch pipeline; one manom
Page 60: Annex I Item Section Equipment Moto

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