GUIDELINES FOR ENERGY CHECKS AND ENERGY ANALYSIS IN WATER AND WASTEWATER UTILITIES

Transcription

1 GUIDELINES FOR ENERGY CHECKS AND ENERGY ANALYSIS IN WATER AND WASTEWATER UTILITIES Optional: Report of a Rapid Survey Energy Efficiency in Water and Wastewater Utilities Author: Holger Laenge Consulaqua Hamburg, Consultant 3 rd Arab Water Week, January 2015, Jordan Energy Efficiency: ACWUA Guidelines for energy checks and analysis Session organized by the ACWUA Energy Efficiency - Task Force Page 1

2 GUIDELINES FOR ENERGY CHECKS AND ENERGY ANALYSIS IN WATER AND WASTEWATER UTILITIES DIRECTIVES POUR LES CONTRÔLES ET LES ANALYSES ÉNERGÉTIQUES DANS LES SERVICES D'EAU ET D'ASSAINISSEMENT ACWUA member countries Working plan to use the Guidelines in Water supply, Eng. Holger Laenge, Hamburg Wasser/Consulaqua, Germany Cooperation Project with: ACWUA, GIZ, TUTTAHS & MEYER, aquabench Page 2

3 Report of a Rapid Survey Energy Efficiency in Water and Wastewater Utilities Egypt, Tunisia and Morocco Important background information The approaches to energy efficiency are different in every country (depending on applied regulations and energy tariffs) The context in every utility is different and it has to be seen if ACWUA members can agree on common procedures Status of Decisions & Planning? Jordan EA was executed, implementation is under way (detailed design) Tunisia (ONAS) on energy management procedures (ISO ) Morocco on improvement of the TOR for energy audits Page 3

4 Case Study Energy Efficiency Programme (EEP) Energy Assessments in the Jordanian Water Supply System Executed by Dorsch Consult, Amman Outcome of Inception Phase Identification of Priority List and Facilities with best energy saving potential to select: 10 to 15 PS 5-10 well fields to proceed with the detailed energy assessment on the selected facilities Page 4

5 Step 1: Identification of the Major Energy Consumers Input Data Identification of Mayor Energy Consumer Profit & Loss Statements: 1. pumping stations & well fields 2. Water Treatment plants some countries also: Desalination Units List of the important Energy Consumers (Utility and Ministry) Collection of Data (water & energy consumption, locations etc.) Page 5

6 Step 1: Identification of the Major Energy Consumers Maps with Facilities Input Data Energy Audit Jordan Consumption 1,076kWh: PS 76% (819 mio kwh) WF 24% (258kWh) Page 6

7 Step 2: Grouping of Facilities and Analyses through Key Performance Indicators η = Hydraulic Energy (output) Electric Energy (input) = Ppump Pel = Q H ρ g 3 U I cosϕ η System Water Input η Feq Regulation η Motor ( ) η Pump Power Input Frequency Regulation Motor Pump Water Discharge Power Meter (kwh) Suction Pressure (bar) Volume (m3/h) Current Meter (A) Discharge Pressure (bar) η Pump = 0,0,87-89 (for large Pumps) η Motor = 0,95 (for large Motors) Page 7

8 Step 2: Grouping of Facilities and Analyses through Key Performance Indicators KPI 1 overall efficiency of pump & motor KPI 2 Specific energy consumption (par meter head pumped) p = (P/Q*h) (kwh/m 3 *h) KPI 3 specific Energy consumption p = (P/Q) (kwh/m 3 ) Simplified equation η = (Q * H / 367) / 3 * U * I cos φ Page 8

9 Step 3: Data Collection and Evaluation 1 Energy checks (EC) & 2 Energy Analysis (EA) including in the monitoring procedures KPI 1 overall efficiency (%) KPI 3 specific Energy consumption (kw/m 3 ). 3 Energy Audit (EAU) every 2 to 4 years, better to be included in the annual inspection routine KPI 1 overall efficiency (%) KPI 2 specific Energy consumption (kw/m 3 *m) KPI 3 specific Energy consumption (kw/m 3 ) not relevant Page 9

10 Step 3: Data Collection and Evaluation Page 10

11 Step 4 Financial Evaluation & Ranking Only PSs & WF with positive saving potentials should further taken into consideration: less than 80% efficiency in special cases like very large stations less than 70% efficiency for all other stations and wells. Calculation of the rated costs: [P rating =Q*h/(367*ɳ)*1,5] Rated Cost for Pumping Stations Electromechanical Installations Investment Costs JOD Cost Estimate Jordan Contracts 2001 Cost Estimate Kaw 2011 rehabilitation Rated Motor Power (kw) Page 11

12 Priority List for the Pumping Stations Middle Governora tes Water Yamouk WC Southern Governorates Water Facilities Responsible Body Mihayuna WC Aqaba WC Amman Zar Balqa Yamouk Karak Tafilah PS Pumping Station Height + Q 2011 El. Cons ᶯ 2011 Saving Saving friction (m3/yr) [m] (kwh/yr) [kwh/yr] [JOD/yr] (kw) (JOD) (years) (JOD/kWh) 1 Zay 61,203,273 1, ,741, % 13,213, ,275 49,748 4,974, Al Muntaza 2 43,800, ,528, % 13,637, ,724 2,486 1,243, Ras El Ain Turbine 4,380, ,921,370 3,921, , , Wadi Eseer 2,911, ,461, % 1,298,944 87, , Shafa 3,581, ,232, % 1,003,197 67, , At Tamween 1,752, ,129, % 1,277,177 85, , Shraya PS 3,003, ,536,221 44% 2,268, , , Yazzidieh 2,692, ,598,055 44% 1,695, , , Wadi Arab PS PS3 21,374, ,211,160 65% 2,592, ,717 3,049 1,524, PS 2 20,498, ,788,111 66% 2,148, ,963 2,869 1,434, PS 1 20,498, ,085,719 58% 4,882, ,119 3,156 1,578, PS 0 4,169, ,454,091 48% 1,970, , , Hofa PS 3,171, ,149,252 51% 1,017,855 68, , Jafhiya PS 1,688, ,155,521 49% 967,103 64, , Sumaya PS 2,045, ,592,882 20% 2,573, , , Al Ghwair - 3,047, , As Safi - - 1,062, , Ein Sara ,788 50% 1,855, , , Al Qasr , , Karak , , Hasa PS No. 1 2,244, ,802,852 35% 1,484,275 99, , Hasa PS No. 2 2,244, ,663,825 47% 1,004,392 67, , Hasa PS No. 3 2,244, ,371,229 23% 2,348, , , Zibdah PS 900, ,207,180 31% 706,798 47, , Ad Disi 20,829, ,459, % 10,702, ,086 4,582 2,290, Disi Aqaba Turbines 20,829,884-68,919,429 68,919,429 5,858,151 7,868 3,933, Power Rating Investment Costs Pay-Back Spec Investment Ranking Total 304,182, ,254,765 48% 145,026,589 11,027,914 82,413 22,094, Power Saving 25% Page 12