Tender: RIBA Stage 3 Design for Water Source Heat Pump and District Heat Network – Tanygrisiau

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Ynni Ystradau is seeking a supplier for RIBA Stage 3 design services for a water source heat pump (WSHP) and district heat network to serve the village of Tanygrisiau (around 200 homes and several non-domestic properties) and Rehau’s factory, extracting heat from Tanygrisau Lake and using two local hydros to power the WSHP via a local energy market. The appointed consultancy will develop an optimised, technically robust and commercially viable design and secure licences, consents and approvals, exploring integration of complementary renewables including solar PV, thermal energy storage and battery storage where beneficial. Scope is split into Lot 1 (WSHP and reservoir extraction design in consultation with Engie, WSHP housing and pumps, assessment and sizing of thermal and electrical storage, heat demand assessment, system optimisation, full designs and costs, running costs and staffing, and identification of licences and legal agreements) and Lot 2 (detailed phased heat network infrastructure design, routing, zoning, phasing plan, full designs and costs, running and maintenance costs, and identification of licences and legal agreements). Current design assumes a network flow temperature of approximately 55°C but alternatives may be proposed with justification; bidders must demonstrate 3D digital modelling and BIM capability, provide previous work examples, and state how they will collaborate if bidding for one or both lots.