Speaker
Description
This study presents experimental thermal tests on TBPX evaporators conducted at CERN, B186.
The primary objective is to validate the current design of the most critical cooling loops with an inner diameter of 1.6 millimeters and, in second instance, to evaluate the impact of vapor quality (VQ) and Heat Flux on the thermal performance and stability of the cooling circuits by examining various operating configurations.
The experiments were performed by changing the VQ levels at 40%, 33%, and 25% and analysing the circuits' behaviour at different heat fluxes.
The results reveal that significant instabilities and high temperature peaks occur at high operating heat fluxes, particularly at 40% VQ: the current design value.
However, the 33% and 25% VQ settings exhibit improved stability; specifically, the 25% VQ configuration shows a marked reduction in instabilities, while the 33% VQ setup experiences only small temperature spikes at higher heat fluxes, suggesting a promising enhancement in thermal management.
The analysis, which is built on the evaluation of averages and standard deviations for every test configuration (Heat Flux and VQ), contributes to optimize the cooling’s design of CMS Inner tracker.
The findings provide a solid foundation for simulation studies (Multiline’s simulations) to investigate pressure drops and to assess the feasibility of achieving the 25% and 33% VQ targets under operational conditions.