Hefei General Machinery Research Institute

Hefei, China

Hefei General Machinery Research Institute

Hefei, China

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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.


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 | Fan H.-L.,China Academy of Space Technology
Energy | Year: 2011

Spray cooling is an effective method for dissipating high heat fluxes in the field of electronics thermal control. In this study, experiments were performed with distilled water as a test liquid to study the spray cooling heat transfer in non-boiling regime. A Phase Doppler Anemometry (PDA) was used to study the spray characteristics. The effects of spray flow rate, spray height, and inlet temperature on spray cooling heat transfer were investigated. It was found that the parameters affect heat transfer of spray cooling in non-boiling regime by the spray characteristics and working fluid thermophysical properties. Then the corresponding droplet axial velocity and Sauter mean diameter (SMD) were successfully correlated with mean absolute error of 15%, which were based upon the orifice diameter, the Weber and Reynolds numbers of the orifice flow prior to liquid breakup, dimensionless spray height and spray cross-section radius. The heat transfer in non-boiling regime was correlated with a mean absolute error of 7%, which was mainly associated with the working fluid thermophysical properties, the Weber and Reynolds numbers hitting the heating surface, dimensionless heating surface temperature and diameter. © 2011.


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.


Cheng W.-L.,University of Science and Technology of China | Liu Q.-N.,University of Science and Technology of China | Liu Q.-N.,Hefei General Machinery Research Institute | Zhao R.,University of Science and Technology of China | Fan H.-L.,China Academy of Space Technology
Heat and Mass Transfer/Waerme- und Stoffuebertragung | Year: 2010

The effects of spray height, nozzle spray angle, inlet pressure and spray incident angle on heat transfer of spray cooling were studied by an experimental method. Multi-points thermocouples and infrared imaging device were used to measure temperature distribution on heating surface. A Doppler anemometry and a camera were applied to study the spray flow field. The mechanism of heat transfer of spray cooling was concluded on the basis of experimental data and spray characteristics. It is showed that parameters affect heat transfer by way of changing the flow field on the heating surface. Heat transfer performance can be optimized by a smaller spray angle nozzle, which sprays at a smaller spray height and a higher inlet pressure. The effect of incident angle on heat transfer depends on nozzle spray angle and the definition of distance of nozzle to surface. © 2010 Springer-Verlag.


Xu S.,China University of Petroleum - East China | Wei R.,China University of Petroleum - East China | Wang W.,Shandong University | Chen X.,Hefei General Machinery Research Institute
International Journal of Hydrogen Energy | Year: 2014

In this study, a sequentially coupling finite element analysis (FEA) program was utilized to simulate the welding temperature and predict the residual stress in the weld and Heat Affect Zone (HAZ) between the nozzle and the head. The results of a numerical calculation indicated that complex residual stresses were generated and concentrated in the weld and HAZ. Due to the existence of the interlayer gap between the two layers of the head, discontinuous stress distributions occurred. There were several sections where there are stress concentrations because of the discontinuous structure. The influences of welding heat input and preheating temperature were also investigated in this study. When the preheating temperature increased, the peak residual stresses in the structure decreased. The welding heat input had little effect on the residual stresses. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Chen Y.,Hefei General Machinery Research Institute | Chen Y.,National Engineering Research Center on Safety of Pressure Vessels and Pipeline | Chen X.,Hefei General Machinery Research Institute | Chen X.,National Engineering Research Center on Safety of Pressure Vessels and Pipeline
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2013

Large-scale shell-and-tube heat exchanger (STHE), spiral wound heat exchanger (SWHE) and plate-shell heat exchanger (PSHE) have been widely used in many industries. The technical difficulties of these heat exchangers suitable for large-scale ethylene, refinery and coal-chemical plant are discussed. During the 11th five plan period, remarkable developments were made in such aspects as the cooperativity study between the structure and process design of heat transfer & fluid flow, the material technical requirements of super-long heat exchange tube, and the design and manufacturing technology of large tube-sheet for large-scale STHE. Such large-scale SWHE products as the large-scale multi-stream SWHE, the high pressure SWHE using Ni-base alloy butt welded joints with low residual stress, and the feed gas cooler of rectisol unit with combinative structure are successfully developed one after another. The domestic manufacturing of super-large PSHE is guaranteed by such key technologies as the heat exchange plate considering both fluid distribution and heat transfer performance, the stepping compression molding process for whole plate, the argon shielded arc welding or resistance welding process, and the new type of feed spray distributor etc. The representative products of large-scale heat exchangers are also listed. The heat exchange areas are larger than 10000 m2 for STHE, 7000 m2 for SWHE and 10000 m2 for PSHE in China. All these above mentioned products have been successfully put into service in the coal-chemical and petro-chemical plants. With focus on such aspects as the actual phase transformation mechanism study for mixed medium, the adoption of highly effective heat transfer element and the reliability study of large-scale heat exchanger etc., several questions related to the domestic manufacturing of these large-scale heat exchangers and their future developing direction are presented. © 2013 Journal of Mechanical Engineering.


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.


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.


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.


Pengju G.,Hefei General Machinery Research Institute | Xuedong C.,Hefei General Machinery Research Institute | Weihe G.,Hefei General Machinery Research Institute | Huayun C.,Hefei General Machinery Research Institute | Heng J.,Hefei General Machinery Research Institute
Journal of Magnetism and Magnetic Materials | Year: 2011

The surface magnetic field intensity H p(y) of low-carbon steel plate specimen was measured after tensile test and unloading; variation of H p(y) was studied. It was found that H p(y) signals first decreased with increase in stress, and then reversed to the initial field when the stress was greater than 160 MPa. Under yield stress, H p(y) reached its maximum, and then decreased slightly with further increase in stress. The initial magnetic signals have great impact on the variation of magnetic field. © 2011 Elsevier B.V.

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