1. MODELLING OF AN OPTIMIZED, AUTOMATED WATER SUPPLY SYSTEM FOR OLKARIA
JOH-KGN 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

2. BSc. Electrical & Electronics Engineering Graduate Member of IEK
JOH-KGN 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

3. Outline Introduction Challenges Design Cost Benefit Analysis
Recommendation
Conclusion

4. Introduction Age - Since 1984 Water Source - Lake Naivasha
JOH-KGN 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 KM waterline
Storage M litre Tanks

5. 20% of abstracted water cannot be accounted for
JOH-KGN JvW-X1
2015 Energy Audit
Operation excellence, improved reliability and efficiency
Bursts, leakages and unmetered consumers
20% of abstracted water cannot be accounted for

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

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

8. JOH-KGN JvW-X1
Water Source
masl by WRA

9. Abstraction Vs Consumption
Abstraction Limit m3/month

10. Design

12. Design Valve control Flow monitoring Pressure compensation
JOH-KGN 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

13. Operation and Control

14. Operation and Control

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

16. Monitoring: SCADA

17. Monitoring: SCADA

18. Cost Benefit Analysis Status Quo With SCADA Inefficient Transparent
JOH-KGN 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

19. 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

20. 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)

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

22. Thank you