Journal of Thermal Analysis and Calorimetry

, Volume 136, Issue 4, pp 1597–1614 | Cite as

Nanofluids’ stability effects on the thermal performance of heat pipes

A critical review
  • Karen CacuaEmail author
  • Robison Buitrago-Sierra
  • Bernardo Herrera
  • Elizabeth Pabón
  • S. M. Sohel Murshed


Nanofluids have been introduced as an alternative to conventional fluids to improve energy efficiency in heat transfer systems. However, their stability problems before and after operation cycles can produce inconsistent results in different heat transfer technologies that use them. This review summarizes different experimental results obtained using nanofluids in heat pipes, particularly in two-phase closed thermosyphons, and it focuses on the role of preparation and stability issues of nanofluids before and after their use in these devices. Additionally, the effects of nanofluids on heat pipes’ thermal performance were compiled and compared from available experimental studies in the literature. Nanoparticles’ deposition on the evaporator surface and wick or groove structures were the most common mechanism to explain the reported increase or decrease in the thermal performance of heat pipes. This review also identifies the research problems that need to be solved in order to use nanofluids that outperform conventional fluids in heat pipes.


Nanofluids Heat pipes Two-phase closed thermosyphon Nanofluids’ stability Thermal performance 



The authors gratefully acknowledge the financial support of COLCIENCIAS—Colombia (1118-669-46092 CTO: 126-2015), Universidad Nacional de Colombia, and Thermal Sciences Lab at Instituto Tecnológico Metropolitano de Medellín—Colombia.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Karen Cacua
    • 1
    • 2
    Email author
  • Robison Buitrago-Sierra
    • 2
  • Bernardo Herrera
    • 1
    • 2
  • Elizabeth Pabón
    • 1
  • S. M. Sohel Murshed
    • 3
    • 4
  1. 1.Advanced Material Science GroupUniversidad Nacional de Colombia, Sede MedellínMedellínColombia
  2. 2.Advanced Materials and Energy Group - Matyer, Faculty of EngineeringInstituto Tecnológico MetropolitanoMedellínColombia
  3. 3.Centro de Química Estructural, Faculdade de CiênciasUniversidade de LisboaLisbonPortugal
  4. 4.Center for Innovation, Technology and Policy Research, Instituto Superior TécnicoUniversidade de LisboaLisbonPortugal

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