THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON
Wasel, M., Mousa, M., El-Negiry, E., El-Adl, A. (2012). THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON. EKB Journal Management System, 15(15th International Conference on Applied Mechanics and Mechanical Engineering.), 1-24. doi: 10.21608/amme.2012.37064
M. G. Wasel; M. G. Mousa; E. A. El-Negiry; A. S. El-Adl. "THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON". EKB Journal Management System, 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., 2012, 1-24. doi: 10.21608/amme.2012.37064
Wasel, M., Mousa, M., El-Negiry, E., El-Adl, A. (2012). 'THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON', EKB Journal Management System, 15(15th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 1-24. doi: 10.21608/amme.2012.37064
Wasel, M., Mousa, M., El-Negiry, E., El-Adl, A. THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON. EKB Journal Management System, 2012; 15(15th International Conference on Applied Mechanics and Mechanical Engineering.): 1-24. doi: 10.21608/amme.2012.37064

THERMAL PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON

The International Conference on Applied Mechanics and Mechanical Engineering
Article 78, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Page 1-24  XML PDF (517.36 K)
Document Type: Original Article
DOI: 10.21608/amme.2012.37064
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Authors
M. G. Wasel1; M. G. Mousa2; E. A. El-Negiry3; A. S. El-Adl4
1Professor, Dept. of Mech. Power, Mansoura University, Mansoura, Egypt.
2Associate professor, Dept. of Mech. Power, Mansoura University, Mansoura, Egypt.
3Lecturer, Dept. of Mech. Power, Mansoura University, Mansoura, Egypt.
4Graduate student, Dept. of Mech. Engineering, Higher Technological Institute, Tenth of Ramadan City, Egypt. Tel: +02 01224566764.
Abstract
ABSTRACT
A two-phase closed thermosyphon (TPCT) is a device for heat transmission consisting
of an evacuated tube filled with a certain amount of working fluid. Fluids with
nanoparticles (particles smaller than 100 nm) suspended in them are called nanofluids
that they have a great potential in heat transfer enhancement. In the present study the
thermal performance of conventional two phase closed thermosyphon (CT) and
modified thermosyphon (MT) containing a separator in the evaporator section was
investigated in case of using distilled water and Al2O3/Water nanofluid as working
fluids. The effect of heat input (500 W  Q  1000 W), working fluid filling ratio (40% 
FR  90%), inclination angle (40°    90°), separator diameter (ds = 25mm, 32mm
and 40mm) and nanoparticles volume concentration (0.5%  Ø  2%) on thermosyphon
thermal performance was experimentally investigated. The variation in Nusselt number
was taken as an indication to the thermosyphon performance.
The results showed that an average increase of 8 % up to 19.5 % in Nusselt number can
be achieved when using a separator in the evaporator section with distilled water as a
working fluid. Also an average increase of 24.5 % up to 164.5 % in Nusselt number was
achieved when using Al2O3/Water nanofluid instead of distilled water for CT. In case of
using Al2O3/Water nanofluid in the presence of a separator in the evaporator, an
average increase of 75 % up to 197 % in Nusselt number can be achieved. The
experimental data are compared to the available data from previous studies and the
agreement is found to be fairly good. A correlation was developed for prediction of the
Nusselt number taking into consideration the effect of the varying separator diameter.
The correlation agrees with the experimental data within ± 19.5% accuracy.
Keywords
Al2O3 nanoparticle; Evaporator Separator; Nanofluid; Two-phase closed thermosyphon; Thermal Performance
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