Travail de fin d'études et stage[BR]- Travail de fin d'études : Study and Selection of a pump for a mechanically pumped diphasic loop demonstrator for Capillary Jet Loop (CJL) diphasic technology [BR]- Stage

Abstract

In the actual context of energy development, the needs in cooling for high density heat flux for batteries, power electronics and data center and so on increases years after years. In addition, the energy transition linked to the environment, the energy consumption becomes a major issue for every business. A young technology with heat load and transport capability limitation, called capillary pumped loop, totally passive, become to take place in the refrigerating domain. This TFE will consider the coupling of this passive element with a pump, in order to investigate the limitation of the coupled elements.

A small review of the already experienced coupling is presented in a first time. Then, the design specification of the pump soon to be introduce the most suitable way in the project is realised, leaving no technology behind. Following that, the architecture of a plausible test bench is justified, joined by different experimental set up to describe the performance of the chosen pump.

To predict the experimental scenario, a simplified but complete model is realised. This model relies on many assumptions to obtain the global behaviour of the loop in steady-state. The refrigerating loop is mainly composed by the pump, a capillary evaporator, a liquid vapour jet pump(DCC box) and a subcooler. The model predict an efficient coupling in term of transport capability for the water, with a low supplementary energy consumption below 50 [W] for a heat load of 3200[W] and a transport capability multiplied by 5. The coupling also predict a small effect on the thermal limit of the evaporator, allowing more subcooling (around 4[°C]) at the inlet of it and decreasing the generation of vapor before the evaporator. This work lets the door widely opened to experimental validation of the model.