1. 5th G2G INNOVATION PRESENTATION JULY 2017
JOH-KGN JvW-X1
SOLAR HYDRO HYBRID POWER ENERGY AT TURKWEL
5th G2G INNOVATION PRESENTATION JULY 2017
Francis Adeya & Anthony Chesang
&
Enashipai Resort and Spa- Naivasha

2. PRESENTATION OUTLINE 1.0 INTRODUCTION 2.0 PROBLEM STATEMENT
3.0 PROPOSED SOLUTIONS
4.0 COST BENEFIT ANALYSIS
5.0 CONCLUSION
6.0 WAY FORWARD

3. 1.0 Introduction
Turkwel power station is meant to feed 106 MW to the grid throughout the year.
During drought, the sky is always clear and the solar irradiance normally very high.
The reservoir water levels drop prompting to run on half capacity.
This solar insulation can be tapped to generate power and integrate it to the grid network.

4. 1.0 Introduction Cont.
Quality power supply in Western Kenya region is of outmost importance.
This can be achieved by incorporating hydro solar hybrid power energy at Turkwel
Solar energy can be captured in two forms, either as heat or as electrical energy.
Heat to heat water into steam, then run steam turbine through CSP system and direct electrical through PV system.

5. 2.0 Problem Statement During drought, Turkwel generates half capacity.
Turkwel reservoir at lowest level masl

6. 1.0 Problem Cont.
Source Turkwel daily report

8. 2.0 Problem Statement Cont.
Dam Low level results to loss of revenue and power fluctuation in Western region.
Inconsistent power supply to the consumers in the country.
Most industries and business operators are compelled to go for expensive alternatives.
The burden of this alternatives is passed over to the consumer, making life unbearable.

9. 3.0 Proposed Solution Introduce Hybrid alternative of hydro, solar power energy at Turkwel.
CSP Hybrid
Floating PV Hybrid
Piotr Zajda/ Shutterstock

10. 3. 0 Proposed Solution Cont
3.0 Proposed Solution Cont. Hybrid alternative will ensure Steady state power
CSP Hybrid
Floating PV Hybrid
Floating solar is clean and sustainable technology.
Land to accommodate power equipment
Solar collectors.
Receiver tower.
Water to generate steam.
Floating solar is clean and sustainable technology.
Avoids the need of land
No vegetation clearing
Water is a cooling medium. Hence, high efficiency

11. 3.0 Proposed Solution Cont.
Floating PV Hybrid
3.0 Proposed Solution Cont.
CSP Hybrid
Molten salt to store heat for use during night periods.
The project will require solar tracking equipment
Steam turbine will be incorporated.
Will give direct AC power to the grid
Reduced rate of water evaporation.
Growth of algae will be inhibited by shading effect averting the possibility of algal bloom.
Will require inverters to invert DC to AC power

12. Concentrated Solar power / Photovoltaic Power Schematic
CSP PV

13. A solar-thermal power project near Daggett, California.
CSP Typical Layout
Concentrated Solar Plant
Source: U.S. NASA

14. Floating Green Power Plant
PV Solar Layout
Floating Green Power
Source New York Times

15. Turkwel Dam cover area is 66KM² at FSL 1150 masl
Turkwel dam and plains where the floating PV panels and CSP will be installed
Facts on the Dam
Turkwel Reservoir
Turkwel Dam cover area is 66KM² at FSL 1150 masl
The reservoir capacity is Billion m³
If full, the reservoir can averagely run the two units for three years without any fresh flow.
Source is Google Map

16. World's largest solar-hydro power station
Plentiful solar radiation and the Longyangxia reservoir, with generation units and solar PV station jointly regulated to mitigate solar power fluctuations

17. The Longyangxia Solar-hydro Power Station in China's Qinghai province, solar-hydro power station. Solar-hydro power project, supply 483 million kWh to the grid. On river yellow

19. This project will attract sponsors since it is a clean energy and does not interfere with the flora, fauna and aura of the environment.
KenGen as a major stake holder in the power energy sector needs to be in the lead in solar power alternative source of power.
The project will earn KenGen good revenue, sustained energy supply to the nation and stabilize voltage problem in western region.
The CSP plant will also assist in building up the reservoir level at Turkwel since it will be able to generate even at night when the PV system has stopped during the day.

20. Cost Benefit Analysis of floating Panel
Utility Scale
Module cost,
(2010 USD/W)
Inst
alled cost
(2010 USD/W Ef
ficiency
(%)
LCOE
(USD/KWh)
Amorphous Si thin film
0.84 – 0.93
3.6 – 5.
8 – 9
0.26 – 0.59
Source IRENA 2012

21. Cost Benefit Analysis of CSP
Parabolic trough
Installation Cost
(USD/KWh)
Capacity factor %
O & M
LCOE
No Storage
4600
20 to 25
0.02 to 0.035
0.14 to 0.36
6 hour storage
7100 to 9800
40 to 53
Solar tower
6 to 7.5 hrs. storage
6300 to 7500
40 to 45
0.17 to 0.29
12 to 15 Hours storage
9000 to 10,500
65 to 80
Source IRENA 2012

22. Conclusion
KenGen should initiate the hybrid program at Turkwel that combine Hydro, floating Photovoltaic and Concentrated Solar Panel power project.
This will ensure uninterrupted power supply through-out the year and also help to fill up the reservoir.
Turkwel reservoir if full, can generate for three years without any inflow.
This will give quality power and mitigate power shortages and fluctuating voltage in the region

23. Way Forward
KenGen pick on both or one of the solar alternatives to hybrid Turkwel Hydro system.
The hybrid system can help build up the dam which can be used as a back up in times of need.
The floating panel will not require land but the concentrated solar thermal will require land. The beauty of it is that the area is not densely populated and the land is a game reserve under the county authority.
To be a market leader in the region, KenGen should take on this ambitious initiative and make this presentation a reality.

24. The End Expected financial benefit (per annum) Payback period
Kawagoe Japan
The End
Expected financial benefit (per annum)
Feed-in Tariff + Export Tariff
Payback period
Expected financial return after 20 years
Expected electricity generation
(per annum)
CO kg saved (per annum)