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Communication Dans Un Congrès Année : 2012

Simulation of the operating characteristics of a cascaded LHP with thermal connector for a board electronic cooling

N. Riviere
  • Fonction : Auteur
V. Sartre
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Jocelyn Bonjour

Résumé

For avionic applications, heat can be transferred from the electronic cards to the heat sink in a totally passive way by Loop heat pipes (LHP). In order to keep the possibility of racking the electronic box, a cascaded LHP is envisaged, including a "card LHP" which dissipates heat from the electronic components to a thermal connector and an "aircraft LHP" which links the connector to the aircraft structure. The connector ensures the thermal link between the condenser of the card LHP and the evaporator of the aircraft LHP. The objective of the present work is to design this cascaded LHP, in the operating conditions corresponding to avionic applications. A simplified analytical model is used (Launay et al., 2008). The selection of the geometry, fluid and materials is performed by means of a sensitivity analysis to these parameters. Four fluids were compared - methanol, ethanol, water, acetone - and two materials for the evaporator body - copper, stainless steel. Wicks made of sintered powder of nickel or copper and a polypropylene wick are simulated. Some relevant geometrical parameter are varied, the tube diameter and the wick thickness. With the proposed cascaded LHP, the evaporator temperature does not exceed the maximum allowable limit in the whole operating range.
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Dates et versions

hal-01020476 , version 1 (08-07-2014)

Identifiants

  • HAL Id : hal-01020476 , version 1

Citer

N. Riviere, V. Sartre, Jocelyn Bonjour. Simulation of the operating characteristics of a cascaded LHP with thermal connector for a board electronic cooling. 16th International Heat Pipe Conference, May 2012, Lyon, France. ⟨hal-01020476⟩
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