China Wuzhou Engineering Corporation LTD

Beijing, China

China Wuzhou Engineering Corporation LTD

Beijing, China
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Li X.-W.,Nanjing Southeast University | Li X.-W.,Nanjing University of Science and Technology | Zhang X.-S.,Nanjing Southeast University | Quan S.,China Wuzhou Engineering Corporation Ltd.
Applied Energy | Year: 2011

Liquid desiccant cooling system (LDCS) is a novel air-conditioning system with good energy saving potential. However, the present LDCS has a poor performance, mainly because the conventional thermal regeneration method wastes too much energy during the regeneration process. To improve that, photovoltaic-electrodialysis (PV-ED) regeneration method is introduced: it has a higher performance by using solar photovoltaic panels to drive an electrodialysis regeneration process. To further explore the PV-ED method, both single-stage and double-stage photovoltaic-electrodialysis regeneration systems are presented in this paper. Analysis is made on these two systems and some influential factors are investigated. It reveals that the concentration difference between the desiccant solution before and after regeneration has a strong impact on system performance. Moreover, comparison is conducted between the single-stage and the double-stage systems, the results show that the double-stage system is more energy-efficient and it can save more than 50% energy under optimized working conditions. © 2011 Elsevier Ltd.

Li X.-W.,Nanjing University of Science and Technology | Li X.-W.,Nanjing Southeast University | Zhang X.-S.,Nanjing Southeast University | Cao R.-Q.,Nanjing Southeast University | Quan S.,China Wuzhou Engineering Corporation LTD
Energy and Buildings | Year: 2012

Liquid desiccant cooling system (LDCS) is an alternative air-conditioning system with good energy-saving potential. Dehumidification performance is the key part of LDCS; while desiccant variety and dehumidifier influence the dehumidification performance. However, few works have been done about how to select cost-effective liquid desiccant and good performance dehumidifier. To improve, we proposed a new method for selecting a cost-effective mixed desiccant group: it combines the non-random two-liquid equation (NRTL equation) with the desiccant cost to get the mathematical form of the cost-effectiveness. Meanwhile, through the comparison experiments among different dehumidifiers, we have found out some helpful tips for dehumidifier design: it achieves better effect with rougher surface and adsorption absorption complex plan. These progresses increase the dehumidification performance by more than 50% and could make LDCS more competitive in the future market. © 2012 Elsevier B.V. All rights reserved.

Li X.-W.,Nanjing University of Science and Technology | Li X.-W.,Nanjing Southeast University | Zhang X.-S.,Nanjing Southeast University | Quan S.,China Wuzhou Engineering Corporation LTD
Applied Thermal Engineering | Year: 2012

Producing ice with supercooled water is a favourable method for ice-storage. However, it undergoes the problems of often unexpected ice blockage and heavy electric power consumption. To improve, this paper proposes a new method: it evaporates water to supercooled state in an atmosphere of low humidity instead of supercooling water inside a heat exchanger; liquid dehumidification reproduces the atmosphere of low humidity to form a cycle. In theoretical analysis made about the evaporative supercooling, we ameliorate the traditional evaporation model to predict the temperature variation. To the experimental research, we adopted particle dynamics analyzer and infrared camera to examine the physical process, and it got ice with this new method. The theoretical results agree well with the experimental results. Also, it found this new method cannot only solve the ice blockage problem, but also reduce the electric power consumption and raise the efficiency. Compared with the conventional supercooled water method, the highest performance improvement can arrive at 98%.

Guo S.,Nanjing University of Science and Technology | Yin J.,China Wuzhou Engineering Co. | Peng M.,Nanjing University of Science and Technology | Wan W.,Nanjing University of Science and Technology | And 2 more authors.
Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | Year: 2013

Thermal decomposition behaviors of crude oil and its mixtures with two kinds of typical desulfurization agents, named as TS02 and JH02, were studied by C80 micro-calorimetry. Based on the acquired data, reaction kinetic parameters such as activation energy, pre-exponential factor, etc, were calculated, respectively, and then the influences of two desulfurization agents on thermal decomposition of crude oil were analyzed and compared. The results showed that the initial decomposition temperature and the decomposition activation energy of the crude oil were reduced by mixing crude oil with desulfurization agent, at the same time, the heat of decomposition reaction increased and the self-accelerating decomposition temperature (SADT) decreased. Thermal hazard caused by the mixture of crude oil with desulfurization agent was far higher than that by pure crude oil. The JH02 had much more influence on crude oil desulfurization process than TS02.

Zhang S.-D.,Tongji University | Huang C.-H.,Tongji University | Liu J.,China Wuzhou Engineering Co.
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2013

To study the fire resistance performance of timber, 20 Chinese larch specimens exposed to fire were tested, half of which were painted with fire retardant agent and another half were not treated. The thicknesses of charring layers after different burning duration were measured and charring rates were obtained by linear regression method. Then the parallel-to-grain compression tests were conducted with the fired specimens. The results show that the strength of timber parallel to grain decrease after fire, and a linear expression can be used to describe the bearing capacities of remaining sections versus burning duration. The test results also show that the fire retardant agent by the brushing method used in the research can retard charring rate at the early stage, but it is almost useless to rescue the strength loss.

Ji Y.-P.,Xi'an Modern Chemistry Research Institute | Gao F.-L.,Xi'an Modern Chemistry Research Institute | Han R.,China Wuzhou Engineering Corporation LTD | Chen B.,Xi'an Modern Chemistry Research Institute | And 4 more authors.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2013

The solubility parameter of 1, 5-diazido-3-nitrazapentane(DIANP)was estimated by group contribution method and determined by turbidity titration method. The solubility of DIANP in different solvents was studied. Results show that the estimated values are in accordance with the determined ones. The solubility parameter of DIANP is determined as 22.29 (J/mL)1/2.The solubility of DIANP in different solvents follows the "better miscibility with similar solubility parameter" principle.

Wang J.,Hefei University of Technology | Wang J.,South China University of Technology | Guo S.,Hefei University of Technology | Guo S.,China Wuzhou Engineering Co. | Chen L.,Hefei University of Technology
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2011

In this paper, four beam-column endplate joint specimens of concrete-filled thin-walled steel tube frame with ribs were tested under static loading. The end of the high strength bolt is welded with 50 mm long deformed rebar. The steel tube of the column is composed of the cold-formed thin-walled steel members with 1.5 mm or 3.0 mm thickness. The endplate type and the thickness of column were investigated to study the failure modes and moment-rotation relationships of the connections. Bending capacity, stiffness, ductility and strain distribution of each component of the key part were also analyzed. Local thickening of steel tubular column wall and anchorage strengthening of bolts were proposed. The results show that the bending moment capacity and initial stiffness of connections of concrete-filled thin-walled steel tube frame are affected by the endplate type and thickness of the tube. The failure modes are the endplate bending, the pulling out of tension bolts, the rupture of column wall near bolt holes and the fracture of steel bars at the end of blind bolt, etc. The tested joints, which behaved in a semi-rigid and partial strength manner, has reasonable strength and stiffness, whilst the rotation capacity of the connection exceeds the required ductility of American Specification FEMA350 by 0.030 rad.

Luo X.-L.,Changsha University of Science and Technology | Zeng X.-J.,Changsha University of Science and Technology | Zeng M.,Changsha University of Science and Technology | Liao Z.,Changsha University of Science and Technology | Zhao D.-H.,China Wuzhou Engineering Co.
2012 IEEE Innovative Smart Grid Technologies - Asia, ISGT Asia 2012 | Year: 2012

Serious ice covering on transmission line will make the line overload. As a result, it may cause many problems to equipments of the power system, such as power towers falling down, lines broken, icing flashover, network disconnecting and so on. With the development of power grid, there are more and more ring networks in the grid. Considering the unique structure of this network, this paper proposes a novel protection method for the icing line by choosing an optimal breaking point and gives an optimal mathematical model. The method could obtain a larger current for the icing line by disconnecting an optimal line and redistributing the power flow. If the obtained current is larger than the critical icing current, the ice covering on the line may stop growing and the line would be protected. Additionally, the ice could melt as the current is large enough. Finally, the simulation analysis by PSASP shows that this method is feasible and correct. © 2012 IEEE.

Liu W.,China Wuzhou Engineering Co. | Ding D.,China Wuzhou Engineering Co.
Proceedings of the 12th International Symposium on Structural Engineering, ISSE 2012 | Year: 2012

For The Mencius Grand Theatre, the issues of the theatre structural design were studied in this paper. Including selection of structural form and arrangement of structure, the control of calculation indicators, the achieving of the stalls structure and the cantilevered balcony structure, foundation design and so on. According to the design objects of the structure performance, the static and earthquake were analyzed with SATWE, MIDAS and PMSAP programs. The calculation assumptions and the theater model simplification were discussed. The seismic fortification measures were also investigated to intensify the concept design.

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