--- title: "Doorian 310kW Intake rebuild" id: "890" type: "post" slug: "doorian-310kw-intake-rebuild" published_at: "2020-09-23T08:33:07+00:00" modified_at: "2025-04-29T10:57:44+00:00" url: "https://dulas.org.uk/doorian-310kw-intake-rebuild/" markdown_url: "https://dulas.org.uk/doorian-310kw-intake-rebuild.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: - "Aquashear" - "Hydro" --- # Doorian 310kW Intake rebuild **Project Overview** To replace an existing intake which suffered from severe blocking problems. 1. Increase generation of scheme by improving intake screening performance. 2. Reduce operational costs related to screen cleaning and supervision. The Doorian scheme was built in 2001 but the intake structure utilised a side-intake, upstream of a small weir. Located on boggy peat moorland, the intake blocked very quickly with grass on a regular basis, leading to significant lost generation. Having provided operation and maintenance services at the site since 2007, Dulas were contracted by Celtic Hydro to design a new intake structure to enable the installation of Coanda screens and increase plant generation. Dulas delivered a turnkey project including all consents, landowner negotiation, construction, project management and optimisation. The project was completed on time and within budget. **Solution** In order to maintain pipe inlet submergence, “quarter height” high capacity Coanda screens were used. This resulted in a low weir structure spanning the river with a new fish pass and ‘splash-trough’ on the downstream side of the weir. Construction required the diversion of the river and negotiation with an adjacent landowner to facilitate this. Since commissioning, the generation of the scheme has increased by 79% (calculated by correlation with a scheme with an adjacent catchment and similar operational profile). The scheme is in the Republic of Ireland, with relatively low tariffs, in spite of which the work will payback in a little over three years. Key FeaturesPower Output310 kWIntakeHigh capacity Coanda ScreensPipelineHepworth 450mm diaTurbineCanyon Twin Jet PeltonGeneratorSynchronous Gross head110 mDesign flow400 l/s By [Dulas Group](https://dulas.org.uk/author/dulas/) Published On: September 23, 2020 Share: [https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F&t=Share%3A](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F&t=Share%3A) [https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F](https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F) [https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F&title=Share%3A&summary=Project%20OverviewTo%20replace%20an%20existing%20intake%20which%20suffered%20from%20severe%20blocking%20problems.Increase%20generation%20of%20scheme%20by%20improving%20intake%20screening%20performance.Reduce%20operational%20costs%20related%20to%20screen%20cleaning%20and%20supervision.The%20Doorian%20scheme%20was%20built%20in%202001%20but%20the%20intake%20structure%20utilised%20a%20side-intake%2C%20upstream%20of%20a%20small%20weir.%20Located%20on%20boggy%20peat%20moorland%2C%20the%20intake%20blocked%20very](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F&title=Share%3A&summary=Project%20OverviewTo%20replace%20an%20existing%20intake%20which%20suffered%20from%20severe%20blocking%20problems.Increase%20generation%20of%20scheme%20by%20improving%20intake%20screening%20performance.Reduce%20operational%20costs%20related%20to%20screen%20cleaning%20and%20supervision.The%20Doorian%20scheme%20was%20built%20in%202001%20but%20the%20intake%20structure%20utilised%20a%20side-intake%2C%20upstream%20of%20a%20small%20weir.%20Located%20on%20boggy%20peat%20moorland%2C%20the%20intake%20blocked%20very) [https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F](https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F) [mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%2F](mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fdoorian-310kw-intake-rebuild%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/)