1. Scottish Water Horizons Delivering innovation in the Hydro Nation
Fraser Purves
Commercial Manager

2. Who are Scottish Water Horizons
An overview…
Owned by Scottish Water
Self funded
Leveraging value of Scottish Water assets
Identifying commercial opportunities
Contributing to Scottish Water’s renewable objectives
Supporting Scotland’s growth agenda
What we do… 2

4. The Scottish Water Vision…
The energy challenges
The scale of the challenge currently being
faced by SW:
Largest energy consumer within Scotland
£40m per annum energy bill
Reducing SW’s carbon footprint
The Scottish Water Vision…

5. Horizons hydro programme
The hydro potential
SWH hydro investment into the asset
SWH hydro programme
A crucial part of the SWH programme is the Difgen… a new turbine technology

6. What is a Difgen? An alternative turbine technology
A water turbine that combines:
Pressure reduction + flow control
Power generation by harvesting the energy from the resulting pressure drop
Installed within potable water distribution networks
The Difgen concept was developed by Zeropex

7. The Difgen turbine… what it looks like

8. The heart of the Difgen… the techy bit
Hydro power from fluid pressure
A positive displacement rotary lobe pump running in reverse to act as a turbine
How does it work?
Differential pressure created by the braking force load applied from the grid
Retards the rotational speed
Allows either flow or pressure control

9. Denny Difgen… a first in Scotland
The facts
In line between Carron Valley WTW to Quarter BPT
2 No. Duty models installed with an output of 100kW
Energy produced; 600 MWh per annum… enough to power 150 homes
Investment at £800k
Return on investment
Annual income estimated at £147k
Anticipated payback of 6 years

10. Denny Difgen… a first in Scotland

11. What are the benefits?
The asset base can be fully exploited for renewable energy
The scale of the Difgen opportunity... 3,500 PRVs in SW asset base
Pan Scotland Difgen programme kicked off with first 20 sites… estimated to produce 15,000MWh… enough to power 4,000 houses
Benefits to SW and our customers

12. Closing thoughts… a positive contribution to generating green energy
Finally, I want to leave you with these key messages:
The Difgen technology supports SW vision of becoming a low carbon water company
The Difgen is an enabler for:
Smart leakage management
Reducing carbon footprint
Ultimately reducing the electricity bill
Thank you