Research Progress of Heat Transfer Characteristic for Nanofluids in Different Heat Pipes
This paper summarizes the preparation methods,thermal characteristics,and heat transfer characteristic research of nanofluids,along with the application of different nanofluids in oscillating heat pipe,gravity heat pipe and flat plate heat pipe in recent years.Some problems such as particle hysteresis and inhomogeneous dispersion of nanofluids applied in heat pipes are indicated and analysed.A large number of studies have shown that the use of metal nanoparticles and the appropriate ratio of nanofluids can effectively strengthen the heat transfer of heat pipes.When the mass fraction of nanofluid is 0.01％to 3.00％,the heat transfer efficiency has a peak value.An applicability analysis of new experimental conditions for heat transfer models are carried out for several latest nanofluid phase-change heat transfer models in heat pipes,it is found that the heat transfer model proposed by Mohseni exhibits an average computational deviation of approximately±13.8％under the new operating conditions.And a model more suitable for new experimental conditions is proposed based on Mohseni model,with an average devi-ation of±3.4％.By analyzing the problems existing in the heat transfer application of nanofluids deep-ly,the paper presents that searching a secondary non-contact anti-polymerization method for particle poly-merized nanofluids is a key research direction for the reliable application in heat pipes of nanofluids in the future.
nanofluidheat pipeheat transfer characteristicheat transfer model
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