Speakers
Description
This study presents experimental tests on a TBPX cooling manifold conducted at CERN.
The objective is to validate the design methodology for all CMS Tracker capillaries, which is based on the modelling and simulation of different cooling loops (grouped by their manifold) using the Multiline tool.
The tested manifold, which groups seven lines, is the most complex and unbalanced one in the entire Tracker, since the thermal power applied across different evaporators varies by up to a factor of four. This circumstance implies considerably different pressure drops and mass flow requirements between neighboring cooling loops. At the aim of addressing this complexity, the capillaries have been designed with four different inner diameters (ranging from 0.5 mm to 0.8 mm) and four different lengths (from 0.8 m to 1.4 m).
Moreover, modules failure is simulated by turning off the heat load on one or more evaporators, thereby addressing the flow distribution in the case of dead loops.
The agreement between experimental results and simulations will validate the Tracker capillary design methodology for all manifolds, the majority of which feature balanced loops and, therefore, identical capillaries.