Recently, researchers have focused on the use of nanofluids to improve the heat transfer of thermal systems despite the risk of using this technology and its high cost. Are there thermal systems in which the use of nanofluids is useless?
Hayder,
Some general disadvantages might be their high price and the potential instability of the suspension.
Systems with high density and viscosity cause higher pressure drop. This can be seen as another disadvantage of nanofluids application as coolant liquids.
Regards
Dear Dr. Hayder,
there are some challenges to make this nanofluids commercially applicable, and one of the most important challenge is the scale up capacity. now efforts should be put on how to synthesis those nanoparticles with low cost-effective chemical or physical methods then data bank for the thermophysical properties of all nanofluids that be investigated in literature should be in a wide world cooperation. anyway, there are some practical application for nanofluids that represented by cooling of electronic device you can see for example:
www.frozencpu.com/products/15033/ex-liq-203/Ice_Dragon_Cooling_Nanofluid_Coolant_White_Color_-_32oz.html
Regards
Dear Mounir , Mohammed and Khaoula
Thank you for your interest
Is it possible to say that the use of nanofluid in all thermal systems is always useful?
If nanoparticles are uniformly suspended in base fluid and there are no signs of sedimentation and agglomeration then you can say that the use of nanofluid in thermal system is useful. On other hand if particles are agglomerated or settled in bottom of storage tank or the system through which they are flowing then thermal performance may be poor than simple base fluid.
The thermal performance depends upon thermo-physical properties. These thermo-physical properties directly depends on the stability of particles in the base fluid.
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