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Reducing the thermal resistance of a pressed contact

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  • O'Callaghan, P. W.
  • Probert, S. D.

Abstract

The resistance to a heat flow passing across the interface between two surfaces which are pressed together, may be reduced by the presence of a relatively-soft interfacial insert of appropriate material and thickness. A computer-based mathematical model has been developed to predict the optimal thickness for this interfacial insert, which will minimise the thermal resistance of the contact assembly. The model has also been used to predict the behaviour of a joint formed between the flat surfaces of two, originally isothermal, cylindrical components, one of duralumin and the other of a titanium alloy. The predictions were validated (to within ±15%) by experimental measurements. For the particular systems studied, aluminium cooking foil, which is widely available, proved to be a superior insert to the more expensive, commerically advocated, thermal control materials for reducing contact resistances.

Suggested Citation

  • O'Callaghan, P. W. & Probert, S. D., 1988. "Reducing the thermal resistance of a pressed contact," Applied Energy, Elsevier, vol. 30(1), pages 53-60.
    • Handle: RePEc:eee:appene:v:30:y:1988:i:1:p:53-60
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