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Journal of Enhanced Heat Transfer

Impact factor: 0.562

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i3.80
pages 265-274

Micro/Miniature Heat Pipes and Operating Limitations

Yiding Cao
Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida 33174
Amir Faghri
College of Engineering, Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Rd., Unit 3139, Storrs CT 06269-3139, USA


A literature review related to miniature and micro heat pipes is given. It is found that longitudinal groove designs are crucial to increase the heat transport capacity of miniature heat pipes. In addition to the operational limitations of conventional heat pipes, micro heat pipes may be subject to the vapor continuum limitation, which may prevent micro heat pipes from operating under lower working temperatures. An analysis of the capillary limit reveals that the disjoining pressure may play a role in heat transfer for the micro heat pipe and may increase its heat transfer capacity.