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Cheng W.-L.,Anhui University of Science and Technology | Han F.-Y.,Anhui University of Science and Technology | Liu Q.-N.,Anhui University of Science and Technology | Liu Q.-N.,Hefei General Machinery Research Institute | Zhao R.,Anhui University of Science and Technology
International Journal of Heat and Mass Transfer | Year: 2012

In this study, the effects of droplet velocity non-uniformity, SMD (Sauter mean diameter) distribution non-uniformity, droplet number non-uniformity, and heating power on the fluid film thickness, fluid film velocity, and surface temperature distribution were investigated, and then the surface temperature non-uniformity correlations in non-boiling regime and nucleate boiling regime were correlated. The results show that: with the decreasing of the spray parameters non-uniformity, the fluid film thickness on the heating surface becomes more uniform, and the fluid film velocity increases, thus the surface temperature non-uniformity decreases. The highest surface temperature appears in the centre of the heating surface, and the lowest is nearby the position where the fluid film appears. The droplet number non-uniformity contributes the largest portion of impact on the surface temperature non-uniformity, followed by the droplet velocity non-uniformity. The effect of droplet SMD non-uniformity is the minimal. Finally, the surface temperature non-uniformity correlations in non-boiling regime and nucleate boiling regime were correlated with a mean absolute error of 20%. © 2012 Elsevier Ltd. All rights reserved. Source


Cheng W.-L.,Anhui University of Science and Technology | Han F.-Y.,Anhui University of Science and Technology | Liu Q.-N.,Hefei General Machinery Research Institute | Zhao R.,Anhui University of Science and Technology | Fan H.-L.,China Academy of Space Technology
Energy | Year: 2011

In this study, a test system for spray cooling, in which the heating surface temperatures were simultaneously measured by thermocouples and an infrared imager, was set up. A mathematical model of spray cooling heat transfer characteristics was presented based on the fundamentals of dynamics and heat transfer. The temperature distribution on the heating surface was investigated by the experimental and theoretical methods, the surface temperature non-uniformity and its influencing factors were analyzed. The predictions by the model coincided with the experimental results well, and a comparison was demonstrated with a deviation below 10%. It can be concluded that the surface temperature non-uniformity is influenced by the spray characteristics, nozzle-to-surface distance, inlet pressure, heat flux, spray angle and the system pressure. In the case of the same heat flux, the surface temperature non-uniformity can be reduced by the small spray angle, low system pressure, low nozzle-to-surface distance, and the high inlet pressure. © 2010 Elsevier Ltd. Source


Zhe Y.,Hefei General Machinery Research Institute | Qizhao L.,Anhui University of Science and Technology | Zhu B.,KTH Royal Institute of Technology
International Journal of Energy Research | Year: 2011

Solid oxide fuel cell (SOFC) is a true multi-fuel energy conversion device that produces electricity directly from fuel through electrochemical reactions. In this paper, the performance of intermediate temperature SOFC (ITSOFC) fueled by ethanol was analyzed. The exhaust gas of SOFC has high value in use. So SOFC is integrated into a hybrid system with other power system for co-generations. Based on a mathematical model of ITSOFC, the steady-state model of each designed system was presented. Results show that a co-generation system can achieve high efficiency. The research on SOFC fueled by ethanol is useful for the application of new and renewable energy. The results of this research can be useful in design and application for SOFC in co-generations. © 2011 John Wiley & Sons, Ltd. Source


Wu S.,Hefei General Machinery Research Institute
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2016

The bonding of metal and ultrahigh molecular weight polyethylene mainly depends on the surface adhesion, therefore, surface treatment plays an important role in affecting the bonding properties. Different methods were used on ultrahigh molecular weight polyethylene and metal to obtain different test samples, among which the best bonding sample was obtained after testing the adhesive strength of each sample. The sample by chemical treatment proves to have the best bonding strength, which is 2.8 times that of the sample whose surface was cleaned simply. © 2016, Research Institute of Beijing. All right reserved. Source


Li Y.,Hefei University of Technology | Zheng J.-Q.,Hefei General Machinery Research Institute | Yang S.-L.,Hefei University of Technology
International Journal of Advanced Manufacturing Technology | Year: 2010

This paper deals with a multi-agent architecture of agile manufacturing system and a hybrid strategy for shop floor scheduling. Firstly, it proposes a distributed multi-agent-based manufacturing structure, which has characteristics of self-determination and distribution grounded on multi-agent as well as control and harmony grounded on hierarchical structure or dynamic logical unit. Then, based on the fuzzy theory and method, it studies a hybrid shop floor scheduling strategy that combines fuzzy programming with fuzzy contract net protocol. The hybrid strategy has both virtues of precision of static programming and flexibility of contract net protocol. © 2009 Springer-Verlag London Limited. Source

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