MODELLING OF AN OPTIMIZED, AUTOMATED WATER SUPPLY SYSTEM FOR OLKARIA JOH-KGN001-20071212-JvW-X1 MODELLING OF AN OPTIMIZED, AUTOMATED WATER SUPPLY SYSTEM FOR OLKARIA Presented by: Johannes Ochome 2018 G2G INNOVATION SEMINAR, PRIDENN PARADISE 18TH JUNE - 22ND JUNE 2018

BSc. Electrical & Electronics Engineering Graduate Member of IEK JOH-KGN001-20071212-JvW-X1 JOHANNES OCHOME Engineer, Geothermal Infrastructure & Resource Development BSc. Electrical & Electronics Engineering Graduate Member of IEK PDip: Geothermal Utilization UNU-GTP (Iceland) Responsibilities: Design and implementation of Geothermal Infrastructure projects Key milestones/achievements include: Member of the KenGen Energy Park implementation team ISO QMS and EMS Internal Auditor

Outline Introduction Challenges Design Cost Benefit Analysis Recommendation Conclusion

Introduction Age - Since 1984 Water Source - Lake Naivasha JOH-KGN001-20071212-JvW-X1 Introduction So far New pumps – Same model Soft starters: More protection of motors Lake Naivasha abstraction restrictions Long network 27km only main line 5 No. Surface tanks Water use Drilling Powers stations Orpower Contractors Age - Since 1984 Water Source - Lake Naivasha Network - 27KM waterline Storage - 4.1 M litre Tanks

20% of abstracted water cannot be accounted for JOH-KGN001-20071212-JvW-X1 2015 Energy Audit Operation excellence, improved reliability and efficiency Bursts, leakages and unmetered consumers 20% of abstracted water cannot be accounted for

Challenges Age of equipment Metering Control JOH-KGN001-20071212-JvW-X1 Challenges Report recommended change of water lines, monitoring levels and leak detection Corrosion – Water pipes Soil erosion Age of equipment Metering Control

ASSESSMENT of water supply system Optimised pumping MODEL/ SCENARIO Automated SOLUTION

JOH-KGN001-20071212-JvW-X1 Water Source 1885.3 masl by WRA

Abstraction Vs Consumption Abstraction Limit 240000 m3/month

Design

Design Valve control Flow monitoring Pressure compensation JOH-KGN001-20071212-JvW-X1 Design Darcy Weisbarch Equation Head loss Calculation Length of line Joints or Number of Nodes Corrosion/ Friction Size of pipe Valve control Flow monitoring Pressure compensation Aim: Avoid VACUUM  

Operation and Control

Operation and Control

Monitoring: Water Level Pump Speed Flow Power Supply Pressure CCTV JOH-KGN001-20071212-JvW-X1 Monitoring: Important parameters to monitor at all times Valve positions Pressure CCTV Vibration Valves Water Level Pump Speed Flow Power Supply

Monitoring: SCADA

Monitoring: SCADA

Cost Benefit Analysis Status Quo With SCADA Inefficient Transparent JOH-KGN001-20071212-JvW-X1 Status Quo Tedious Human Error Inadequate Reporting SCADA Timely Reports Transparent Easy and fast decision making Cost Benefit Analysis Status Quo Inefficient Tedious Unreliable With SCADA Transparent Improved Productivity Timely reporting

Cost Benefit Analysis 732M - 15Yrs Consumption (150,000 m3/Month) Electricity Bill: 5M Shift Costs: 1.9M Water: KES 160/m3 Opportunity 12M 1.9M 58M 732M - 15Yrs Investment 130M Payback – 1.8Yrs

Recommendation SCADA implementation Existing expertise and infrastructure Maintain critical spares Regular inspection and routine checks Continuous training on maintenance and operation techniques Design/analysis software (engineering equation solver, MATLab)

“You cannot manage what you do not monitor” Conclusion “You cannot manage what you do not monitor”

Thank you