Информация о тендере
Aalborg Forsyning is putting out for tender a contract regarding delivery of a seawater heat pump and technical installations, including a 5-year service agreement. The tender procedure is carried out as a negotiated procedure with prior call for competition according to section 47 of the Utility Directive (2014/25/EU). Aalborg Forsyning is aiming at a short tendering period with a written negotiation phase or no negotiation at all, meaning that Aalborg Forsyning reserves the right to award the contract based on the Tenderers´ first Tenders. If, however, extensive negotiations or further negotiations rounds are needed, the expected date of conclusion of contract (taking over) will be delayed and consequential changes to the contract may in this case be expected, including the payment schedule and possibly the taking over regime as some of the performance tests can only be carried out in cold water in the winter season.
As part of Aalborg municipality’s transition towards green energy, Aalborg Forsyning´s coalfired powerplant, situated at “Nordjyllandsværket”, will be de-commissioned latest in year 2028 and replaced with surplus heat from the industry in Aalborg and new plants for district heating in form of electric boilers and heat pumps based on different natural heat sources. This project is focusing on erecting a large-scale heat pump based on seawater from the Limfjord which historically has been used for cooling the condensers at the coal fired powerplant. The intention for the Sea water heat pump is to establish a 120 – 150 MJ/s plant, situated close by the coalfired powerplant, reusing the existing cooling water infrastructure at the site. The seawater heat pump is intended to be a flexible district heat source with production temperature varying with the demands of the district heating demands and prices of electrical power. The main heat production will be in winter where the water in the fjord will be coldest, but the seawater heat pump is also intended to be utilized in the summer period if the prices for electricity are favorable. The new heat pump plant will be erected in the same site as the existing heat and power plant (“Nordjylland Power Plant”). This site is also the main hub for distributing heating to the city of Aalborg today. The planned heat pump system is based on heat energy being absorbed from the Limfjord by cooling seawater, whereby cooling energy added to the heat pump system in addition to absorbed electrical power gives the total heat energy (nominal) which is supplied to Aalborg Forsyning’s district heating network. Aalborg Forsyning has decided that the existing seawater intakes, pumps and filtration system and the corresponding seawater returns that are currently used to cool the condenser on Nordjylland Power Plant Unit 3 shall be utilized and integrated with the new heat pump plant. It has been assessed - but must be evaluated by the contractor - that the heat pump system can be connected to existing piping of seawater / cooling water to the Nordjylland Power Plant Unit 3 and also whether pumps and filter systems in the treatment plant are large enough (and efficient) to supply cooling water to Nordjylland Power Plant Unit 3 and the heat pump system simultaneously, in a transition period, where both plants will be in operation. Aalborg Forsyning has focus on the following characteristic for the heat pump plant: - Well proven components of high quality, - High heat capacity within the limits set by Aalborg Forsyning, - Cooling media with low environmental impact, - Ability to high heat production at low seawater temperature maintaining 90°C district heating temperature, - High operation flexibility towards changing seawater and district heat temperatures and fast electrical load changes, - High COP, - Low carbon footprint and environmental impact. This Tender is comprising the complete works of engineering, construction and commissioning of a 120-150 MJ/s seawater based heat pump plant (capacity is defined as heat output delivered to the main district heating network), producing 90°C district heating. Reference is made to the Employer’s Technical Requirements for Lot 1 which has been prepared to procure a Contractor for the engineering, installation, and commissioning of the heat pump system described. Aalborg Forsyning will in other lots tender civils and building works and connections to the sea water pump installation (seawater, district heat, electrical and control) and supply one 75 MVA 60/10 KV transformer, 10 KV switchgear and 10/04 transformers with an available capacity of 68 MVA for the contractor. The contract also has an option to purchase an additional sea water heat pump installation between 25-45 MW. The estimated value of the contract including options is between DKK 775-890 million for an installation of 165 – 190 MJ/S. Duration of approximately 36 months excluding service agreement.