Design and construction of PTES heat storage

GENERAL INFORMATION Hyvinkään Lämpövoima Oy ("Contracting Entity") needs a pit thermal energy heat storage ("PTES heat storage"). The PTES heat storage has the following technical characteristics: - Water volume is approximately 380 000 cubic meters; - Water height is 20 meters; - Surface area of the heat storage area including outer rails is approximately 67 700 square meters; - Surface area of the lid structure is approximately 37 250 square meters; - Basal area of the heat storage is approximately 8 125 square meters; and - Inner slopes surface area is approximately 31 300 square meters and their slope is 1:2,5. The PTES heat storage is located in a groundwater area. The construction site is located in Kulomäki old gravel pit in Hyvinkää. SCOPE OF THE PROJECT The PTES heat storage construction project ("Project") includes the following subareas: - Excavation works and civil engineering works of the PTES heat storage; - Engineering works consisting of e.g. mechanical works, process heat works, electrical works, piping works, pump works, heat transfer works on related procurement; - Installation and engineering works for welded earth-facing sealing and protective membrane structures; and - Design and installation of the lid structure. SCOPE OF THIS PROCUREMENT This procurement covers (only) two of the above-mentioned subareas of the Project, divided into separate lots: LOT 1 - Design and installation of the lid structure of the PTES heat storage LOT 2 - Installation and engineering works for welded earth-facing sealing and protective membrane structures of the PTES heat storage DESCRIPTION OF LOT 1 - Design and installation of the lid structure of the PTES heat storage This lot includes the design and installation of the lid structure for PTES heat storage in fully operational condition (Turnkey delivery). The awarded contractor will be responsible for at least for (but not limited to): - Complete detail planning of the lid structure; - Project management and coordination with the Contracting Entity and other contractors at the site; - Delivery, assembly, welding and installation of the lid structure and materials/components included; - Electrotechnical installations of the lid structure; - Documentation and quality assurance; and - Testing of the lid structure. The lid structure must be designed/planned, prepared, delivered, tested, commissioned, and documented in accordance with the overall tender materials (documentation of the Call for Tenders and documentation provided by Tenderer). DESCRIPTION OF LOT 2 - Installation and engineering works for welded earth-facing sealing and protective membrane structures of the PTES heat storage This lot includes the installation and engineering works for welded earth-facing sealing and protective membrane structures (Turnkey delivery). The awarded contractor will be responsible at least for (but not limited to): - Delivery of the geomembranes and other materials/components; - Detailed design on the basis of the design documents provided by Contracting Entity in the Call for Tenders (please see the design documentation attached to the Call for Tenders, and note their non-binding nature); - Installation of the geomembranes and other materials/component; - Coordination with the Contracting Entity and other contractors at the site; and - Documentation. The installation and engineering works must be planned, prepared, delivered, tested, commissioned and documented in accordance with the overall tender materials (documentation of the Call for Tenders and documentation provided by Tenderer). As stated above, this procurement (LOT 1 & LOT 2) covers two of subareas of the Project. Both lots have a separate Call for Tenders and separate tender documents, such as procurement contracts. The procurement contract for LOT 2 is a subcontract subordinated under the PTES heat storage excavation works contract. The procurement contract for LOT 1will not be subordinated under the PTES heat storage excavation works contract. During PHASE II (cf. above DESCRIPTION OF THE PROCUREMENT PROCEDURE), it may be possible to submit Alternative Final Tenders for different U-values ​​for LOT 1, but the Contracting Entity will decide this separately during the negotiations.