The Effect of Nano Hybrid on Thermal Efficiency of Double Tube Heat Exchangers
سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 410
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شناسه ملی سند علمی:
CHCONF04_419
تاریخ نمایه سازی: 8 آذر 1396
چکیده مقاله:
In this study overall heat transfer in a double pipe heat exchanger fitted with twisted-tape elements andhybrid nanofluid were studied experimentally. hybrid nanoparticles with a diameter of 20nm and aconcentration of 1% (w/w) were prepared. The effects of temperature, mass flow rate, and concentration ofnanoparticles on the overall heat transfer coefficient, heat transfer changes in the turbulent flow regimewere investigated.When using twisted tape and nanofluid, heat transfer coefficient was about 40 percenthigher than when they were not used. The experimental results also showed that 1% Al2O3/CuO nanofluidwith twisted tape has slightly higher heat transfer when compared to 1% hybrid nanofluid without twistedtape. The system was used for modeling neural networks.As well as data Reynolds number andconcentration as input nanoparticles overall heat transfer coefficient was chosen as a target. The correlationcoefficient for all data 0.98 is the successful prediction is shown.
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نویسندگان
Mohamad Hosein Barzegar
M.Sc student of chemical engineering of islamic azad university,borujerd branch,Iran
Mohamad Fallahiyekta
Phd of chemical engineering,faculty member of islamic azad university,borujerd branch,Iran