作者机构:
[谢水波; 刘迎九; 荣丽杉; 杨金辉; 杨瑞丽; 唐海琼] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构:
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
作者机构:
[Xie, Dong; Wang, Yun; Mo, Shunquan; Liao, Maili] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Xie, Dong; Wang, Hanqing] Cent S Univ, Sch Energy Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Wang, Hanqing] Hunan Univ Commerce, Changsha 410205, Hunan, Peoples R China.
通讯机构:
[Xie, Dong] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
关键词:
CFD;Capillary ceiling radiant cooling panel;Cooling capacity;Distribution of temperature non-uniformity;Numerical analysis
摘要:
Capillary ceiling radiant cooling panel is a high temperature cooling system, which could pose low energy consumption to meet thermal comfort requirements. A computational fluid dynamics (CFD) simulation study on heat transfer of chilled water flow in the capillary of ceiling radiant cooling panel was performed to attain surface temperature distributions and cooling capacities. Six influencing factors included chilled water inlet parameters, conditions of gypsum plaster and capillary mats structural parameters were considered to obtain the complicated relationships between capillary radiant panel conditions and heat transfer performance. The index of temperature non-uniformity coefficient was proposed to evaluate temperature profiles of ceiling panel surface. The results of the simulation were compared with the values depicted in ASHRAE Handbook and good agreement had been achieved. The average difference between simulation results and the values reported by ASHRAE handbook was within the region of 15%. The research results showed that temperature non-uniformity coefficient was negatively correlated with temperature of chilled inlet water (linear correlation), water velocity (correlation coefficient R = -0.85), and pipe diameter (correlation coefficient R = -0.93), but positively and linearly correlated with tube spacing. Cooling capacity was found to have negative linear correlation with temperature of chilled inlet water, covering thickness and tube spacing. (C) 2015 Elsevier Ltd. All rights reserved.
作者机构:
[唐振平; 谢水波; 史冬峰; 黄华勇; Zeng, Tao-Tao] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构:
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
作者机构:
[Zeng, Taotao] Postdoctoral Research Centre of Mining Engineering, University of South China, Hengyang, Hunan, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydromentallurgy, University of South China, Hengyang, Hunan, 421001, China;[谢水波; 马华龙; 廖伟; 荣丽杉; 李仕友; 蒋小梅; Zeng, Taotao] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China
通讯机构:
[Xie, S.] H;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构:
[丁德馨; 石建军] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[张志恒; 丁德馨; 栗建新; 石建军; 刘华良; 刘权] School of Urban Construction, University of South China, Hengyang, 421001, China
通讯机构:
School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构:
[孙允凯; 阳鹏飞] School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China;[柯国军] School of Civil Engineering, University of South China, Hengyang, Hunan, 421001, China
作者机构:
[Zeng, Sheng; Zhang, Jing] University of South China, Nuclear Resources Engineering College, No. 28, West Changsheng Road, China;[Sun, Bing] University of South China, Institute of Urban Construction, No. 28, West Changsheng Road, China
摘要:
Dynamic testing methods for pile systems and anchorage-with-bolt systems are similar and often confused with each other, possibly resulting in incorrect assessment of the quality of the pile and the anchorage systems. The stress wave velocity is one of the most important parameters for evaluating the quality of dynamic tests. In this paper, the stress wave velocities in standard concrete specimens of the free rock bolt and the different ages were a reference for comparing the stress wave velocities in a pile-and-anchor system. The tests were conducted using the low strain reflected wave method. Results indicate that the wave velocity in a pile is larger than that in the standard samples, and that the wave velocity in an anchorage-with-bolt system is smaller than that in a free steel bar, but larger than that in a pile and in standard samples. Wave velocities in the pile and in the standard samples were found to raise as the ages of samples increased. The wave velocity in the anchorage-with-bolt system initially decreased as specimen age increased, but increased with increasing specimen age afterward.
作者机构:
[谢水波; 陈婧; Zeng, Taotao; 王亮; 凌辉] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构:
[Xie, S.] H;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构:
[谢水波; 王亮; Zeng, Tao-Tao; 刘金香; 杨金辉] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China
通讯机构:
Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构:
[谢水波; 王慧娟; 唐文玲; 王赛; 谢磊; 王劲松] Key Laboratory of Pollution Control and Resource Reuse of Hunan Province, University of South China, Hengyang, China;[唐文玲] Tongren Polytechnic College, Tongren, China
作者机构:
[谢水波; 罗景阳; 刘清; 凌辉; 王劲松] Institute of Urban Construction, University of South China, Hengyang;421001, China;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang;[段毅] Sinosteel Corporation Wuhan Safety and Environmental Protection Research Institute, Wuhan;430081, China
通讯机构:
[Xie, S.] I;Institute of Urban Construction, University of South China, Hengyang, China
期刊:
Geotechnical and Geological Engineering,2015年33(3):751-757 ISSN:0960-3182
通讯作者:
Zeng, Sheng(zeng0808@126.com)
作者机构:
[Sun, Bing; Guo, Shanshan] Institute of Urban Construction, University of South China, Hengyang, China;[Zeng, Sheng] School of Nuclear Resources Engineering, University of South China, Hengyang, China;[Yang, Chao] Centre for Geotechnical and Materials Modelling, The University of Newcastle, Newcastle;NSW;2308, Australia
通讯机构:
[Sheng Zeng] S;School of Nuclear Resources Engineering, University of South China, Hengyang, China
关键词:
Anchorage system;Consolidation wave speed;Consolidation wave speed;Nondestructive testing;Wave speed in anchoring medium
摘要:
Anthraquinone-2-sulfonate (AQS) was employed in humus substitutes to evaluate the effects and influencing factors of U(VI) reduction-by Shewanella oneidensis MR-1 (S. oneidensis MR-1) under anaerobic-condition. The removal rate of U(VI) at 30 ℃ reaches 99.0% afterd 96 h with the pH value of 7.0 and AQS concentration of 1.0 mmol/L. The effective concentrations of AQS as the accelerator for U(VI) bioreduction are approximately 0.5-1.0 mmol/L. The bioreduction of U(VI) is inhibited when the concentration of AQS exceeds 2.0 mmol/L. The coexistence of ions, such as Cu~(2+), Cr~(6+), Mn~(2+), shows a remarkable negative effect on the U(VI) reduction, and Zn~(2+) shows less influence on the process compared with other tested ions. The U(VI) reduction is remarkably inhibited when the concentration of nitrate ion exceeds 1.0-mmol/L. Otherwise, no difference is found when the nitrate ion concentration is less than 0.5 mmol/L. Sulfate ion (<5.0 mmol/L) slightly promotes the U(VI) reduction. Zero-valent iron (ZVI) promotes the U(VI) reduction by S. oneidensis, and the reduction rate improves with increasing the amount of ZVI in the range of 0-2.0 g/L. The XPS result indicates that uranium deposits on the cell surface are in U(VI) and U(IV) forms, and the majority of uranium in the solution is stable UO_2.
会议名称:
9th International Symposium on Heating Ventilation and Air Conditioning ISHVAC Joint with the 3rd International Conference on Building Energy and Environment COBEE
关键词:
Coupled heat and moisture transfer;Optimum insulation thickness;Lifecycle total cost;Lifecycle saving;Payback period
摘要:
Thermal insulation plays an important role in achieving building efficiency. Many engineering investigations were carried out to determine the optimum insulation thickness. In this paper, a coupled heat and moisture transfer model is presented to calculate the annual energy consumption. Then, the lifecycle total cost is analyzed by the P1-P2 economic model. Based on lifecycle total cost analysis, the optimum insulation thickness is determined. Three representative cities, viz. Changsha, Chengdu and Shaoguan, are chosen as the sample cities. The optimum insulation thickness, lifecycle saving and payback period are estimated. The results show that the optimum thickness of extruded polystyrene (XPS) is between 0.053 and 0.069m and the optimum thickness of expanded polystyrene (EPS) is between 0.081 and 0.105m. The maximum lifecycle saving varies from 16.60 to 28.50$/m2 and the payback period varies from 1.89 to 2.56 years. EPS is more economical than XPS as insulation because of its lower lifecycle total cost. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
作者机构:
[刘金香; 王永华; 谢水波; 马华龙; 陈华柏; 李标] Hunan Provincial Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构:
Hunan Provincial Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构:
[张楚汉; 武明鑫] State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China;[陈振富] School of Urban Construction, University of South China, Hengyang, China