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Heat Pipe Science and Technology, An International Journal

ISSN Imprimer: 2151-7975
ISSN En ligne: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

Heat Pipe Science and Technology, An International Journal

DOI: 10.1615/HeatPipeScieTech.v6.i1-2.80
pages 111-120

DEVELOPMENT OF MINIATURE HEAT SWITCH-TEMPERATURE CONTROLLER BASED ON A VARIABLE CONDUCTANCE LOOP HEAT PIPE

Donatas Mishkinis
IberEspacio, Calle Magallanes 3, 4th floor, 28015, Madrid, Spain
Javier Corrochano
IberEspacio S.A., Avda. Premios Nobel, 53, 28850 Torrejón de Ardoz, Madrid, Spain
Alejandro Torres
IberEspacio, Calle Magallanes 3, 4th floor, 28015, Madrid, Spain

RÉSUMÉ

The design concept and thermal tests under vacuum of a miniature heat switch (MHS) are presented. The MHS is based on the variable conductance vapor-modulated loop heat pipe (VMLHP) technology, in which the switch capacity is provided by a two-way pressure regulating valve installed in the vapor line. The objective of the development is to exceed the current heat switches characteristics (paraffin). The thermal test results reveal that MHS ON/OFF conductance ratio is 580, more than 5 times higher than that of the current state-of-the-art paraffin heat switches, operating with an ON conductance of 3.5 W/K and an OFF conductance of 0.006 W/K. In addition, MHS shows a precise (±1.5°C) and robust temperature control together with a functional gravity field independence and low mass (148 g). The new product combines the advantages of the thermal control based on VMLHP with the miniaturization of new developed components and it would be beneficial for small orbiting spacecrafts. Other potential applications are the thermal control of spacecraft electronic boxes, power electronic components, batteries, and highly dissipative chips on a printed circuit board.


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