Cooling and ventilation for the LHC: status report

For the LHC project, investments for cooling and ventilation will exceed 100 MCHF over a period of six years. This report contains an outline of the group's mandate within the project, as well as a summary of the main design parameters. Furthermore, the author will explain the present status of the cooling and ventilation schedule, with some milestones already achieved and others soon ahead. In fact, two important construction projects prior to the civil engineering building sites were already successfully completed before the end of 1997. As the service infrastructure for the LHC needs to match recovered structures from the LEP project, the author will also discuss and compare the technical content in the light of optimized expenses, design parameters and constraints, as well as new and adaptable technologies and methods.