Monogroove Heat Pipe

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Types of Heat Pipes
  1. Two-Phase Closed Thermosyphon
  1. Capillary-Driven Heat Pipe
  1. Annular Heat Pipe
  1. Vapor Chamber
  1. Rotating Heat Pipe
  1. Gas-Loaded Heat Pipe
  1. Loop Heat Pipe
  1. Capillary Pumped Loop Heat Pipe
  1. Pulsating Heat Pipe
  1. Monogroove Heat Pipe
  1. Micro and Miniature Heat Pipes
  1. Inverted Meniscus Heat Pipe
  1. Nonconventional Heat Pipes

The monogroove heat pipe developed by Grumman utilizes an extruded cross section which separates the vapor space from the liquid return path (Fig. 1) [1][2].

Monogroove Heat Pipe.
Figure 1: Monogroove Heat Pipe.

Heat input and output are through the flat face on top of the vapor space. Since heat is not conducted through the wall of the liquid return path, the chance of arterial blockage due to vapor bubbles is significantly reduced. Wick structures are placed along the interior walls to deliver condensate from the artery to the evaporator. Monogroove heat pipes are proposed to be used for multi-kilowatt space radiator heat rejections systems [3][4].


  1. Alario, J., Haslett, R., and Kosson, R., 1982, "The Monogroove High Performance Heat Pipe," Progress in Astronautics and Aeronautics, 83, 305-324.
  2. Alario, J. P., 1984, "Monogrove Heat Pipe Radiator Shuttle Flight Experiment: Design, Analysis, and Testing," SAE-84-0950, Proceedings of the 14th Intersociety Conference on Environmental systems, San Diego, CA.
  3. Faghri, A., 2012, "Review and Advances in Heat Pipe Science and Technology," Journal of Heat Transfer, 134(12), 123001.
  4. Faghri, A., 1995, Heat Pipe Science and Technology, 1st ed., Taylor & Francis, Washington, D.C.