Heat transfer and thermal efficiency of a lab-fabricated ferrofluid-based single-ended tube solar collector under the effect of magnetic field: An experimental study

The use of variable baffle solar panels for drying is the low level of heat exchange with the air in the dynamic vein of the solar panel. This weakness in such systems does not provide optimal performance or high thermal efficiency from their use. There is, however, a very noticeable improvement in heat transfer when the baffles are placed in rows in the ducts. To conduct the experiments, solar energy was simulated, the goal being to improve the relationship between temperature and thermal efficiency of a solar panel air heating plane and to use the system to reduce the time to gently dry the lemon to keep these vitamins. lemon and destinine for a sustainable therapy (the lemon promotes the absorption of calcium and in case of rhumet gill or five also to treat sinusitis, against migraine solair dryness and also for sustainable conservation and also for a sustainable medicine for a sustainable medicine.

Download Full-text

Experimental study of the effect of a transverse magnetic field on convective heat transfer in the turbulent flow of an electrically conducting fluid in a channel

Fluid Dynamics ◽

10.1007/bf01013554 ◽

1971 ◽

Vol 3 (2) ◽

pp. 60-61

Author(s):

D. S. Kovner ◽

E. Yu. Krasil'nikov ◽

V. S. Nikolaenko ◽

I. G. Panevin

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Experimental Study ◽

Turbulent Flow ◽

Convective Heat Transfer ◽

Convective Heat ◽

Transverse Magnetic Field ◽

Transverse Magnetic ◽

Electrically Conducting ◽

Electrically Conducting Fluid

Download Full-text

Experimental Study of Internal Forced Convection of Ferrofluid Flow in Porous Media

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.348.139 ◽

2014 ◽

Vol 348 ◽

pp. 139-146 ◽

Cited By ~ 2

Author(s):

Ashkan Sehat ◽

Hani Sadrhosseini ◽

M. Behshad Shafii

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Experimental Study ◽

Porous Media ◽

Temperature Distribution ◽

Pressure Drop ◽

Forced Convection ◽

Volume Fraction ◽

Flow In Porous Media ◽

Tetra Methyl Ammonium Hydroxide

This work presents an experimental study of the effect of a magnetic field on laminar forced convection of a ferrofluid flowing in a tube filled with permeable material. The walls of the tube are subjected to a uniform heat flux and the permeable bed consists of uniform spheres of 3-mm diameter. The ferrofluid synthesis is based on reacting iron (II) and iron (III) in an aqueous ammonia solution to form magnetite, Fe3O4. The magnetite is mixed with aqueous tetra methyl ammonium hydroxide, (CH3)4NOH, solution. The dependency of the pressure drop on the volume fraction, and comparison of the pressure drop and the temperature distribution of the tube wall is studied. Also comparison of the wall temperature distribution, convection heat transfer coefficient and the Nusselt numbers of ferrofluids with different volume fractions is investigated for various Reynolds numbers (147 < Re < 205 ). It is observed that the heat transfer is enhanced by using a porous media, increasing the volume fraction had a similar effect. The pressure coefficient decreases for higher Reynolds number. The effect of magnetic field in four strategies, named modes, on ferrofluid flow through the porous media is presented.

Download Full-text