New construction of a cooling system and distribution for the DLR site in Göttingen - General planning services, service phases 2-9 according to HOAI

The cooling water supply for all experimental and supply facilities at the German Aerospace Center (DLR) site in Göttingen is currently provided by two wet cooling towers distributed across the site, each with open cooling water circuits and a capacity of approx. 4.0 MW. The connected cooling water network for supplying the individual consumers is largely routed openly to the consumers within supply corridors between the individual buildings and within the buildings. A small portion of the pipeline system (cooling tower supply building 6 - site) was laid in the ground or openly (crossing the Leine canal). As part of the ongoing construction measure "Sanierung Infrastruktur Erweiterungsgelände" (Infrastructure Renovation Expansion Area), the main cooling water supply for this part of the site has already been newly installed and is to be connected to the new cooling water generation as part of the construction measure. Double-walled PE100 pressure pipelines with leak detection are used here in the ground. The cooling water supply for the entire site, with the exception of the experimental facilities in building 21, is realized via the cooling system at the Leine canal during normal operation. These are supplied by the cooling tower on the roof of building 21. The cooling tower building 21 can also take over the cooling water supply of the site by manual switching if necessary, e.g., for maintenance work, malfunctions, etc. A project study has been prepared for the present measure. This will be made available in the course of this tender. The client has opted for the implementation of variant 5 (adiabatic cooling with V-coolers). The sum of the services of all existing and currently planned future consumers amounts to approx. 19.5 MW according to a rough performance estimate. During the planning phase, the total cooling capacity must be finally determined and defined based on the outstanding performance measurements. The installation of the system technology, including the technical control center, will take place on the area of the building to be demolished (building 23). The cooling water pipeline system is to be completely renewed (material: PE). The new cooling water supply must meet the requirements of the 42. BImSchV and applicable noise protection requirements. The cooling water supply temperature should be max. 27 °C. Mobile supply systems may be required during the construction phase. In addition, a coordinated cooling water supply with the institutes must be agreed upon. Accordingly, the cooling water generation and distribution will be completely renewed as part of the construction measure, and the following partial services, among others, are planned: - Determination of the necessary cooling capacity; - Pipeline network calculation for the cooling water network; - Dismantling of the existing open cooling towers at the Leine canal (near building 6) and building 21; - Optional: Demolition of building 23; - Dismantling of the existing pipeline system; - Construction of the technical control center; - Installation of new cooling water generation in the form of closed, adiabatic cooling towers; - Installation of the new pipeline system including all shut-off and control valves; - Hydraulic balancing of the cooling water network; - Upgrading of fire and noise protection; - Preparation of complete documentation. The construction measure must be carried out in accordance with the guidelines for the execution of subsidized construction measures (RZBau). The total costs of the project (cost groups 200-500) are estimated at approx. 11.85 million € net. Scope of services: The scope of services for general planning includes all necessary planning and monitoring services required for the measure, LPH 2-9 according to the annex to Section 6 of the contract, in particular the service categories: • Object planning for civil engineering structures, • Specialist planning for structural engineering, • Specialist planning for technical equipment ALG 1-8, • Object planning for open spaces, • Building physics. A phased commissioning of the services described below is intended. Initially, in commissioning stage 1a, service phases 2 and 3 (preliminary planning and design planning) according to HOAI, or according to the annex to the contract, will be commissioned. There is no legal entitlement to full commissioning. Further information on the planned measure can be found in the project study and the other information documents attached to the tender documents as "Tender Document G - Planning and Information Documents".