Scottish water horizons delivering innovation in the hydro nation
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Scottish Water Horizons Delivering innovation in the Hydro Nation. Fraser Purves Commercial Manager. Who are Scottish Water Horizons. An overview… Owned by Scottish Water Self funded Leveraging value of Scottish Water assets Identifying commercial opportunities

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Scottish Water Horizons Delivering innovation in the Hydro Nation

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Scottish water horizons delivering innovation in the hydro nation

Scottish Water HorizonsDelivering innovation in the Hydro Nation

  • Fraser Purves

  • Commercial Manager


Who are scottish water horizons

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…


Scottish water horizons delivering innovation in the hydro nation

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…


Scottish water horizons delivering innovation in the hydro nation

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


Scottish water horizons delivering innovation in the hydro nation

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


Scottish water horizons delivering innovation in the hydro nation

The Difgen turbine… what it looks like


Scottish water horizons delivering innovation in the hydro nation

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


Denny difgen a first in scotland

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


Scottish water horizons delivering innovation in the hydro nation

Denny Difgen… a first in Scotland


What are the benefits

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


Closing thoughts a positive contribution to generating green energy

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


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