Heat transfer and friction factor investigations of CuO nanofluid flow in a double pipe U-bend heat exchanger

2019 ◽  
Vol 18 ◽  
pp. 207-218 ◽  
Author(s):  
V. Nageswara Rao ◽  
B. Ravi Sankar
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Friction Factor ◽  
Nanofluid Flow ◽  
Double Pipe

Heat Transfer and Friction Factor of Al2O3 Nanofluid Flow in a Double Pipe U-Tube Heat Exchanger and with Longitudinal Strip Inserts: An Experimental Study

2015 ◽  
Vol 4 (3) ◽  
pp. 293-301 ◽  
Author(s):  
P. V. Durga Prasad ◽  
A. V. S. S. K. S. Gupta ◽  
L. Syam Sundar ◽  
Manoj Kumar Singh ◽  
Antonio C. M. Sousa
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Exchanger ◽  
Friction Factor ◽  
Nanofluid Flow ◽  
Tube Heat Exchanger ◽  
Longitudinal Strip ◽  
Double Pipe

Heat transfer and friction factor correlations for double pipe heat exchanger with inner and outer corrugation

2021 ◽  
pp. 1-28
Author(s):  
Prem Kumar Chaurasiya ◽  
Sanjay Kumar Singh ◽  
Piyush Kumar Jain ◽  
Upendra Rajak ◽  
Tikendra Nath Verma ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Friction Factor ◽  
Double Pipe ◽  
Pipe Heat

scholarly journals Effect of Twisted-Tape Turbulators and Nanofluid on Heat Transfer in a Double Pipe Heat Exchanger

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Heydar Maddah ◽  
Reza Aghayari ◽  
Morshed Farokhi ◽  
Shabnam Jahanizadeh ◽  
Khatere Ashtary
Keyword(s):  
Heat Transfer ◽  
Titanium Dioxide ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Friction Factor ◽  
Flow Rate ◽  
Twisted Tape ◽  
Double Pipe ◽  
Pipe Heat

Heat transfer and overall heat transfer in a double pipe heat exchanger fitted with twisted-tape elements and titanium dioxide nanofluid were studied experimentally. The inner and outer diameters of the inner tube were 8 and 16 mm, respectively, and cold and hot water were used as working fluids in shell side and tube side. The twisted tapes were made from aluminum sheet with tape thickness (d) of 1 mm, width (W) of 5 mm, and length of 120 cm. Titanium dioxide nanoparticles with a diameter of 30 nm and a volume concentration of 0.01% (v/v) were prepared. The effects of temperature, mass flow rate, and concentration of nanoparticles on the overall heat transfer coefficient, heat transfer changes in the turbulent flow regimeRe≥2300, and counter current flow were investigated. When using twisted tape and nanofluid, heat transfer coefficient was about 10 to 25 percent higher than when they were not used. It was also observed that the heat transfer coefficient increases with operating temperature and mass flow rate. The experimental results also showed that 0.01% TiO2/water nanofluid with twisted tape has slightly higher friction factor and pressure drop when compared to 0.01% TiO2/water nanofluid without twisted tape. The empirical correlations proposed for friction factor are in good agreement with the experimental data.

scholarly journals Study the Effect of SiO2 Nanofluids on Heat Transfer in Double Pipe Heat Exchanger

2020 ◽  
Vol 71 (5) ◽  
pp. 117-124
Author(s):  
Noor Sabeeh Majeed ◽  
Shaymaa Mahdi Salih ◽  
Hussam Nadum Abda Lraheemal Ani ◽  
Basma Abbas Abdulmajeed ◽  
Paul Constantin Albu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Friction Factor ◽  
Sio2 Nanoparticles ◽  
Particle Sizes ◽  
Nanoparticle Concentration ◽  
Double Pipe ◽  
Pipe Heat

In this paper the effect of nanofluid is studied in the double pipe heat exchanger counter current flow, the viscosity of nanofluids are measured at different temperatures and different particle sizes. SiO2 nanoparticles are dispersed at different concentrations (0.2-2) % with different particle sizes of (50-25) nm in base fluid of water. The friction factor and heat transfer coefficient are calculated at different nanoparticle sizes, the results showed that the viscosity was increased as nanoparticle concentration increased. The friction factor is increased as SiO2 nanoparticles concentration and increased as nanoparticles size decreased. The heat transfer coefficient increased as nanoparticle concentration increased and particles size decrease.

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