The Key Laboratory of Enhanced Heat Transfer and Energy Conservation

Guangzhou, China

The Key Laboratory of Enhanced Heat Transfer and Energy Conservation

Guangzhou, China
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Zhang X.-F.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Wang S.-F.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Wang S.-F.,Shandong Academy of Sciences | Huo J.-P.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Li X.-Y.,Shandong Academy of Sciences
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2011

There is the requirement of wider working temperature range for cooling system of electric devices in the high-cold area and airborne equipment. To meet this requirement, loop heat pipe with binary mixture of water/ethanol was developed in this work. The effects of ethanol concentration on the operating performance in loop heat pipe had been studied experimentally. The results show that the loop heat pipe with binary mixture can star up successfully under low heat power and when the ethanol concentration decreases start-up performance of loop heat pipe worsens with minimum start-up power and start-up temperature increasing. When working fluid with binary mixture of water/ethanol is applied in the loop heat pipe, its thermal resistance decreases and the maximum heat load rises, which indicates that thermal transport performance of loop heat pipe is improved.


Feng C.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Li F.,Guangdong Institute of Eco environmental and Soil Sciences | Liu H.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Lang X.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Fan S.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation
Electrochimica Acta | Year: 2010

This study reports on the modification of the anode and the cathode in a dual-chamber microbial fuel cell (MFC) with a polypyrrole (PPy)/anthraquinone-2,6-disulfonate (AQDS) conductive film to boost its performance and the application of the MFC to drive neutral electron-Fenton reactions occurring in the cathode chamber. The MFC equipped with the conductive film-coated anode and cathode delivered the maximum power density of 823 mW cm-2 that was one order of magnitude larger than that obtained in the MFC with the unmodified electrodes. This was resulted from the enhanced activities of microbial metabolism in the anode and oxygen reduction in the cathode owing to the decoration of both electrodes with the PPy/AQDS composite. The MFC with the modified electrodes resulted in the largest rate of H2O2 generation in the cathode chamber by the two-electron reduction of O2. The increase in the concentration of H2O2 was beneficial for the enhancement in the amount of hydroxyl radicals produced by the reaction of H2O2 with Fe2+, thus allowing an increased oxidative ability of the electro-Fenton process towards the decolorization and mineralization of an azo dye (i.e., Orange II) at pH 7.0. © 2009 Elsevier Ltd. All rights reserved.


Feng C.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Ma L.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Li F.,Guangdong Institute of Eco environmental and Soil Sciences | Mai H.,The Key Laboratory of Enhanced Heat Transfer and Energy Conservation | And 2 more authors.
Biosensors and Bioelectronics | Year: 2010

This study reports a new approach of improving performance of microbial fuel cells (MFCs) by using a polypyrrole/anthraquinone-2,6-disulphonic disodium salt (PPy/AQDS)-modified anode. The immobilization of AQDS on a carbon felt anode was accomplished by electropolymerization of pyrrole while using AQDS as the dopant. The dual-chamber MFC operated with this modified anode in the presence of Shewanella decolorationis S12 showed the maximum power density of 1303 mW m-2, which was 13 times larger than that obtained from the MFC equipped with an unmodified anode. Evidence from cyclic voltammerty (CV) and scanning electron microscopy (SEM) results indicated that the increase in power generation was assigned to the increased surface area of anode, the enhanced electron-transfer efficiency from the bacteria to the anode via immobilized AQDS, and an increase in the number of bacteria attached to anode. © 2009 Elsevier B.V. All rights reserved.

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