Experimental study for a heat transport device using magnetic fluid: Improvement by a regenerative thermomagnetic heat cycle

2000 ◽  
Vol 214 (7) ◽  
pp. 981-994
Author(s):  
H Yamaguchi ◽  
I Kobori ◽  
N Kobayashi
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Heat Transport ◽  
Magnetic Fluid ◽  
Pipe Wall ◽  
Temperature Sensitive ◽  
Heat Cycle ◽  
One Dimensional ◽  
Working Principle ◽  
Transport Device

Heat transporting characteristics are investigated experimentally for a heat transport device using a temperature-sensitive magnetic fluid. In the present study, in particular the regenerative thermomagnetic heat cycle is considered by allowing heat conduction in the inner pipe wall of the device. According to the heat transport configuration studied, the lower end of the device is heated while the upper end is cooled isothermally when the device is placed vertically. Experimental results show that a relatively high amount of heat can be transported in comparison with the case of an adiabatic inner pipe wall, indicating that the thermomagnetic heat cycle in the device is improved. The correlation obtained from one-dimensional analysis provides a reasonable means of assessing estimating experimental data when the thermomagnetic heat cycle based on the working principle is satisfied.

A Mini Heat Transport Device Based On Thermo-Sensitive Magnetic Fluid

2007 ◽  
Vol 11 (1-2) ◽  
pp. 201-210 ◽  
Author(s):  
Koji Fumoto ◽  
Hideaki Yamagishi ◽  
Masahiro Ikegawa
Keyword(s):  
Heat Transport ◽  
Magnetic Fluid ◽  
Transport Device

Long Distance Heat Transfer of Pump-Less Heat Transport Device Using Temperature-Sensitive Magnetic Fluids

2018 ◽  
Vol 2018 (0) ◽  
pp. GS3-1
Author(s):  
Yuhiro IWAMOTO ◽  
Hayaki NAKASUMI ◽  
Keita ODAI ◽  
Yasushi IDO ◽  
Hiroshi YAMAGUCHI
Keyword(s):  
Heat Transfer ◽  
Heat Transport ◽  
Magnetic Fluids ◽  
Temperature Sensitive ◽  
Long Distance ◽  
Transport Device

scholarly journals Study for Magnetically Controlled Heat Transport Device Using Magnetic Fluid.

1998 ◽  
Vol 64 (617) ◽  
pp. 85-91 ◽  
Author(s):  
Hiroshi YAMAGUCHI ◽  
Itaru KOBORI ◽  
Yoshinobu ISHIGAKI
Keyword(s):  
Heat Transport ◽  
Magnetic Fluid ◽  
Transport Device

Characteristics of a magnetic fluid heat transport device Part 1: Numerical simulation of flow and heat transport phenomena

2000 ◽  
Vol 214 (4) ◽  
pp. 549-561 ◽  
Author(s):  
H Yamaguchi ◽  
I Kobori ◽  
N Kobayashi
Keyword(s):  
Magnetic Field ◽  
Numerical Analysis ◽  
Heat Transport ◽  
Magnetic Fluid ◽  
Numerical Study ◽  
Thermal Characteristics ◽  
Geometrical Model ◽  
Flow State ◽  
Vortex Zone ◽  
Transport Device

A numerical analysis is conducted in order to study the flow state and thermal characteristics of a magnetic fluid heat transport device. A simple geometrical model of the device is considered in the present numerical study. The highly simplified marker-and-cell (HSMAC) method is adopted for the numerical analysis, where the transient solutions are obtained in the two-dimensional axisymmetric computational plane. From results of the numerical calculation it can be shown that the vortex zone appears when a magnetic field is applied and the configuration of flow associated with the vortex zone changes for variation in the magnetic field, increasing or decreasing the heat transport capability dependent upon the conditions of the device.

scholarly journals Experimental study of forced convection heat transport in porous media

2017 ◽  
Author(s):  
Nicola Pastore ◽  
Claudia Cherubini ◽  
Dimitra Rapti ◽  
Concetta I. Giasi
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Experimental Study ◽  
Porous Medium ◽  
Porous Media ◽  
Heat Transport ◽  
Forced Convection ◽  
Convection Heat Transfer ◽  
Convection Heat ◽  
Forced Convection Heat Transfer

Abstract. The knowledge of the dynamics of forced convection heat transfer in porous media is relevant in order to optimize the efficiency of geothermal installations in aquifers. In some applications groundwater is used directly as thermal fluid. The system uses one or several drilling holes to pump and deliver groundwater with a heat exchange system at surface (open loop). Other applications use vertical borehole heat exchangers without injection or extraction of groundwater (closed loop). In both systems the convection flow dynamics in porous media play an important role on the heat production. The present study is aimed at extending this thematic issue through heat transport experiments and their interpretation at laboratory scale. An experimental study to evaluate the dynamics of forced convection heat transfer in a thermally isolated column filled with porous medium has been carried out. The behavior of two porous media having different grain sizes and specific surfaces has been observed. The experimental data have been compared with an analytical solution for one dimensional heat transport for local non thermal equilibrium condition. The interpretation of the experimental data shows that, the heterogeneity of the porous medium affects heat transport dynamics causing a channeling effect which has consequences on thermal dispersion phenomena and heat transfer between fluid and solid phases limiting the capacity to store or dissipate heat in the porous medium.

Terrestrial and Microgravity Experimental Study of Microscale Heat-Transport Device Driven by Electrohydrodynamic Conduction Pumping

2013 ◽  
Vol 49 (6) ◽  
pp. 2397-2401 ◽  
Author(s):  
Viral K. Patel ◽  
Franklin Robinson ◽  
Jamal Seyed-Yagoobi ◽  
Jeffrey Didion
Keyword(s):  
Experimental Study ◽  
Heat Transport ◽  
Transport Device
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