CERN Accelerating science


The mandate of the CV group concerns the design, operation and maintenance of the cooling systems, pumping stations, air conditioning installations and fluid distribution systems for the PS, SPS and LHC including their experimental areas and special cooling systems of LHC sub-detectors. It also provides service to the Computer Centre and some miscellaneous installations. The aim of the Operation and Maintenance sections is to enhance the reliability of the CV installations and reduce the M&O costs. To do so, the group improves continuously maintenance strategies and, in particular, it renews the maintenance plans at equipment level, it completes the documentation and create M&O oriented dossiers including detailed working procedures that allow the subcontracting of M&O work to external contractors. The M&O work is based on a CAMM tool, and in order to improve the operations, the Maintenance Tools section works intensively to provide tools and rebuild the structure of the equipment database to standardize categories/classes of equipment and to be compatible with the technical alarms (CCC-TI) grouping so as to facilitate the understanding of the database and its use. Work on the determination of minimum stock levels, and the provision, of spare parts is also underway. A dedicated works and consolidation section (Bureau d'Etudes) is in charge of consolidation and other small projects from market survey to commissioning stages and participates in the initial phases of projects for the "after LHC" era. The CV group also has the responsibility for the M&O of the LHC Experiments specific cooling equipment and the development of future prototypes and their production. This work is carried out in the Detector Cooling section which also hosts the necessary expertise for CFD simulations of fluid dynamics and heat transfer problems.


Acronym Section Name Section Leader


Renaud Barillere


The CV-CL section is in charge of the control systems for the CV plants. The section also provides support to the CV group GMAO and software activities and to the project leaders for process related questions. The CV plants are controlled by industrial control systems. The software is either developed by contractors or in collaboration with other CERN services or by the section members. The section is responsible for the control systems requirements and for the control architecture definitions. The section handles the tests and commissioning phases. Once the control systems are put in operation, the section provides their operators with the required support and maintains these control systems and their computing infrastructure. The group GMAO relies on data stored in CERN central databases, the section provides support to users of these CV data. The section develops and maintains tools which implement solutions to ease the queries, the production of reports and the population of CV GMAO data. The section also support software packages used for vibrations analysis and chillers operation. In the early phases of the projects, the section can provide support to project leaders to review the process design to verify that the regulations requirements can be meet.


Detector Cooling

Olivier Crespo-Lopez


The Detector Cooling Section is responsible for the cooling systems of ATLAS, CMS, ALICE and LHCb experiments sub-detectors. The mandate of the section is the completion of the design, construction, commissioning and maintenance of the cooling systems for these experiments. The Section has an internal Team dedicated to CFD (Computational Fluid Dynamic) studies. The team develops 3D models to find numerical solution of thermal and fluid flow problems in confined spaces (as sub-detectors or cavern environments). The mandate of this team is to provide assistance to the LHC experiments in the design and prototype phase and support all other CERN units too.


Projects and CFD

Michele Battistin


The Project Section is in charge of cooling and ventilation large projects for LS1 and consolidation of the CV installations. The section members manage the supply and installation contract with the support of the draftsman and work supervisor of the DOW section, the control expert of the CL section and the installation supervisior of the OP section of the group. The CFD (link is external) team is part of the section. This team develop study on ventilation, heat transfer, smoke behaviour, gas propagation and radioation protection studies for the group and for all the overall of CERN services.