--- title: "Upper Bryn Cowlyd 200kW new build" id: "924" type: "post" slug: "upper-bryn-cowlyd-200kw-new-build" published_at: "2020-09-28T08:59:48+00:00" modified_at: "2025-04-29T10:39:46+00:00" url: "https://dulas.org.uk/upper-bryn-cowlyd-200kw-new-build/" markdown_url: "https://dulas.org.uk/upper-bryn-cowlyd-200kw-new-build.md" excerpt: "[fusion_builder_container type=\"flex\" hundred_percent=\"no\" hundred_percent_height=\"no\" min_height_medium=\"\" min_height_small=\"\" min_height=\"\" hundred_percent_height_scroll=\"no\" align_content=\"stretch\" flex_align_items=\"flex-start\" flex_justify_content=\"flex-start\" flex_wrap_medium=\"\" flex_wrap_small=\"\" flex_wrap=\"wrap\" flex_column_spacing=\"20px\" hundred_percent_height_center_content=\"yes\" equal_height_columns=\"yes\" container_tag=\"div\" menu_anchor=\"\" hide_on_mobile=\"small-visibility,medium-visibility,large-visibility\" status=\"published\" publish_date=\"\" class=\"\" id=\"\" margin_top_medium=\"\" margin_bottom_medium=\"\" margin_top_small=\"\" margin_bottom_small=\"\" margin_top=\"0px\" margin_bottom=\"0px\" padding_top_medium=\"\" padding_right_medium=\"\" padding_bottom_medium=\"\" padding_left_medium=\"\" padding_top_small=\"\" padding_right_small=\"\" padding_bottom_small=\"\" padding_left_small=\"\" padding_top=\"\" padding_right=\"0px\"..." taxonomy_category: - "Hydro" --- # Upper Bryn Cowlyd 200kW new build **Project Overview** Dwr Cymru Welsh Water (DCWW) commissioned Dulas to provide a turnkey new build hydro solution for Bryn Cowlyd Water Treatment Works. The objective was to secure planning consent for, design and install a 200kW hydropower turbine and powerhouse, integrated into break pressure tanks on the raw water feed. The outcome is a high quality hydro scheme on live pipework that will have a long operating lifetime, be reliable in operation and contain suitable fail-safe systems to ensure there is no compromise to the supply of raw water to the treatment works. **Fail-safe System** Unlike run-of-river schemes, the level of discharge from the new hydro has to reflect Cowlyd Water Treatment Works’ operational requirements. The hydro control system works in parallel with float operated valves in the break pressure tanks to respond to fluctuating demand at the works. Should the hydro fail or require maintenance, any excess water is automatically routed through a bypass system to the works. This ensures an absolutely reliable and secure supply of potable water into the distribution network. **Surge Protection** The break pressure tanks serve the two parallel raw water pipes that supply the treatment works; a cast iron water main originally installed in the 1920s and a more recently installed ductile iron water main. Dulas designed and delivered a surge protection relief system to provide extra protection to the raw water mains. **Constructed on live raw water supply** The hydro turbine is directly integrated into the water supply pipeline to the treatment works, which are highly sensitive to fluctuations in water quality. Dulas minimised the risk of damage and/or pollution to the water supply during construction whilst working to maintain a live supply to the works. Dulas worked closely with the client to plan shutdowns or reduced flow periods to enable the new pipework connections. Flexibility was key during construction to ensure that Dwr Cymru Welsh Water could always give priority to their primary function, ‘the supply of potable water’ to their customers. Technical OverviewPower Output200 kWTurbineilkes twin jet, high capacity TurgoGeneratorInduction generatorControl PanelDulas design, supplied by Bridges LtdGross head (reservoir spill)71mDesign flow475 l/sPlant duty“Continuous duty” expected to be >95% By [Dulas Group](https://dulas.org.uk/author/dulas/) Published On: September 28, 2020 Share: [https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F&t=Share%3A](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F&t=Share%3A) [https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F](https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F) [https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F&title=Share%3A&summary=Project%20Overview%0D%0A%0D%0ADwr%20Cymru%20Welsh%20Water%20%28DCWW%29%20commissioned%20Dulas%20to%20provide%20a%20turnkey%20new%20build%20hydro%20solution%20for%20Bryn%20Cowlyd%20Water%20Treatment%20Works.%20The%20objective%20was%20to%20secure%20planning%20consent%20for%2C%20design%20and%20install%20a%20200kW%20hydropower%C2%A0turbine%20and%20powerhouse%2C%20integrated%20into%20break%20pressure%20tanks%20on%20the%20raw%20water%20feed.%20The%20outcome%20is%20a%20high%20quality%20hydro](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F&title=Share%3A&summary=Project%20Overview%0D%0A%0D%0ADwr%20Cymru%20Welsh%20Water%20%28DCWW%29%20commissioned%20Dulas%20to%20provide%20a%20turnkey%20new%20build%20hydro%20solution%20for%20Bryn%20Cowlyd%20Water%20Treatment%20Works.%20The%20objective%20was%20to%20secure%20planning%20consent%20for%2C%20design%20and%20install%20a%20200kW%20hydropower%C2%A0turbine%20and%20powerhouse%2C%20integrated%20into%20break%20pressure%20tanks%20on%20the%20raw%20water%20feed.%20The%20outcome%20is%20a%20high%20quality%20hydro) [https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F](https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F) [mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F](mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fupper-bryn-cowlyd-200kw-new-build%2F) Strata Florida water treatment works hydroelectric scheme Strata Florida water treatment works hydroelectric scheme [Read more](https://dulas.org.uk/strata-florida-water-treatment-works-hydroelectric-scheme/) Gafr Hydro, Nant Peris Gafr Hydro, Nant Peris [Read more](https://dulas.org.uk/gafr-hydro-nant-peris/) In situ control panel upgrades at hydro scheme In situ control panel upgrades at hydro scheme [Read more](https://dulas.org.uk/in-situ-control-panel-upgrades-at-hydro-scheme/) An 800kW run-of-river hydro scheme near Loch Lomond An 800kW run-of-river hydro scheme near Loch Lomond [Read more](https://dulas.org.uk/an-800kw-run-of-river-hydro-scheme-near-loch-lomond/) Coanda screens in the Himalayas Coanda screens in the Himalayas [Read more](https://dulas.org.uk/coanda-screens-in-the-himalayas/) Fit for the future: Dulas upgrade Dŵr Cymru Welsh Water’s Elan Valley scheme Fit for the future: Dulas upgrade Dŵr Cymru Welsh Water’s Elan Valley scheme [Read more](https://dulas.org.uk/elan-valley-upgrade/) Increasing output through optimisation at the Llyn Brianne hydroelectric plant Increasing output through optimisation at the Llyn Brianne hydroelectric plant [Read more](https://dulas.org.uk/increasing-output-through-optimisation-at-the-llyn-brianne-hydroelectric-plant/) Inverhaggernie intake refurbishment Inverhaggernie intake refurbishment [Read more](https://dulas.org.uk/inverhaggernie-intake-refurbishment/) Glenmore Control Panel Refurbishment Glenmore Control Panel Refurbishment [Read more](https://dulas.org.uk/glenmore-control-panel-refurbishment/) Atholl Estates Run of River Hydro Scheme Atholl Estates Run of River Hydro Scheme [Read more](https://dulas.org.uk/atholl-estates-run-of-river-hydro-scheme/) Balnacarn Hydro Scheme Balnacarn Hydro Scheme [Read more](https://dulas.org.uk/balnacarn-hydro-scheme/) Iwrch Hydro Scheme Refurbishment Iwrch Hydro Scheme Refurbishment [Read more](https://dulas.org.uk/iwrch-hydro-scheme-refurbishment/)