scholarly journals Experimental investigation of enhanced heat transfer of self-exciting mode oscillating-flow heat pipe with non-uniform profile under laser heating

2006 ◽  
Author(s):  
F. Shang ◽  
H. Xian ◽  
D. Liu ◽  
X. Du ◽  
Y. Yang
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Pipe ◽  
Laser Heating ◽  
Oscillating Flow ◽  
Enhanced Heat Transfer ◽  
Flow Heat

Experimental Investigation on the Heat Transferring of Nanofluid in Self-Exciting Mode Oscillating-Flow Heat

2016 ◽  
Author(s):  
Fu-Min Shang ◽  
Yi-Fang Dong ◽  
Jian-Hong Liu ◽  
Deng-Ying Liu
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Laser Heating ◽  
Cooling Water ◽  
Oscillating Flow ◽  
Distilled Water ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Condensation Section ◽  
Flow Heat

In this article, the heat transferring property of the copper-water nanofluids in self-exciting mode oscillating flow heat pipe under different laser heating power is experimented, as well as is compared with that of the distilled water medium in self-exciting mode oscillating flow heat pipe under same heating condition. The objective of this article is to provide the heat transfer characteristics of Cu-H2O nanofluids in self-exciting mode oscillating-flow heat pipe under different laser heating input, and to compare with the heat transfer characteristics of the same heat pipe with distilled water as working fluids. The SEMOS HP used in this experiment is made of brass tube with 2mm interior diameter, which is consisted of 8 straight tubes with 4 turns’ evaporation section and 12 turns’ condensation section. The heat resource for the evaporation zone is eight channel quantum pitfall diode array semi-conductor laser heater with 940nm radiation wave length, while the radiation power of each channel is changeable within 0–50W and the facular size is 1×30mm2. The condensation section is set in a cooling water tank in which water is from another higher tank. The actual transferring rate could be calculated by the flow rate of the cooling water and the change of the temperature. The change of the temperature of the heat pipe wall is measured by those thermo-couple fixed in different section in the heat pipe and data is collected by a data acquisition. In the heat pipe the fluid filling rate is 43%, the pressure is 2.5×10−3Pa, and the heat pipe inclination angle is 55° while the size of the brass particle in the nanofluids is less than 60nm and volume proportion is 0.5%. In this paper, the particularity of heat transfer rate of the SEMOS heat pipe with Cu-H2O fluid has been experimentally confirmed by changing the proportion of working fluid and Cu nonsocial particles in the heat pipe. By comparing the experimental result of these two different medium in the SEMOS HP, it is shown that the heat transferring rate with brass-water nanofluids as medium is much better than that with distilled water as medium under same volume proportion.

426 Heat transfer characteristic of oscillating flow heat pipe with nano-fluid

2012 ◽  
Vol 2012.22 (0) ◽  
pp. 329-330
Author(s):  
Kentarou Yamaguchi ◽  
Yasuhide Kobayashi ◽  
Noboru Yamada ◽  
Akira Hoshi
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Transfer Characteristic ◽  
Transfer Characteristic ◽  
Oscillating Flow ◽  
Nano Fluid ◽  
Flow Heat

Experimental Investigation on the Heat Transfer Characteristics of Nanofluids in Self-Exciting Mode Oscillating-Flow Heat Pipe

2011 ◽  
Vol 396-398 ◽  
pp. 250-254 ◽  
Author(s):  
Fu Min Shang ◽  
Jian Hong Liu ◽  
Deng Ying Liu
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Working Fluid ◽  
Oscillating Flow ◽  
Filling Rate ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Flow Heat

The objective of this article is to provide the heat transfer characteristics of Cu-H2O nanofluids in self-exciting mode oscillating-flow heat pipe under different laser heating input, and to compare with the heat transfer characteristics of the same heat pipe with distilled water as working fluids. In this paper, the peculiarity of heat transfer rate of the SEMOS heat pipe with Cu-H2O fluid has been experimentally confirmed by changing the proportion of working fluid and Cu nanoscale particles in the heat pipe. As the results, it has been confirmed that the parameter of filling rate of working fluid determine the heat transfer rate of SEMOS heat pipe, although under certain condition heat transfer performance could be improved because of the addition of nanofluids.

Study on Heat Transfer Enhancement of Oscillating-Flow Heat Pipe for Drying

2007 ◽  
Vol 25 (4) ◽  
pp. 723-729 ◽  
Author(s):  
Haizhen Xian ◽  
Dengying Liu ◽  
Fumin Shang ◽  
Yongping Yang ◽  
Xiaoze Du ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Transfer Enhancement ◽  
Oscillating Flow ◽  
Transfer Enhancement ◽  
Flow Heat

Experiments on Enhanced Heat Transfer of Self-Exciting Mode Oscillating-Flow Heat Pipe with Non-Uniform Structure

2010 ◽  
Vol 6 (2) ◽  
Author(s):  
Fu-Min Shang ◽  
Deng-Ying Liu ◽  
Hai-Zhen Xian ◽  
Jian-Hong Liu ◽  
Guo-Hua Chen
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Input ◽  
Heat Transfer Performance ◽  
Electric Heating ◽  
Oscillating Flow ◽  
Uniform Structure ◽  
Heating Source ◽  
Flow Heat ◽  
Uniform Diameter

Experiments were performed on a closed loop self-exciting mode oscillating flow heat pipe (SEMOS HP) with uniform and non-uniform structures under the same tested conditions. The heat transfer characteristics are analyzed by comparing the temperature of wall of the heat pipe and output power when the heat input of the electric heating board and heating position are changed. The result shows that the heat transfer rate could be improved by using a non-uniform structure under low or middle heat input, and it gives the highest heat transfer performance when the non-uniform diameter section is at the bottom of the heat pipe and the heating source located below the non-uniform section.

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