作者机构：
[谢东; 叶勇军; 刘泽华; 熊军] School of Urban Construction, University of South China, Hengyang 421001, China;[王汉青] School of Civil Engineering, University of Hunan Technology, Zhuzhou 412007, China;[谢东; 王汉青] School of Energy Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Urban Construction, University of South China, China
摘要：
Radionuclides released from uranium mine ventilation shafts would pose radiation exposure to the public and environment. A three-dimensional lagrangian stochastic model has been presented to study the atmospheric dispersion of solid-state radionuclides released from the uranium-bearing mine ventilation shafts. Meteorological conditions and geographical conditions including four downwind velocities (0.5, 1.0, 2.0, 4.0 m/s) and two underlying surface roughness characteristics (0.1 m, 1.0 m) were chose in the study. The radionuclides concentration distributions at various wind speeds and surface roughness were attained to evaluate the pollution in the vicinity of uranium mine ventilation shaft.
摘要：
Based on long-term testing and recording of room temperate in a bedroom of residential buildings in the hot summer and cold winter zone, this assay focuses on comparative analysis of tested results and simulated results derived from the DeST software. It verifies the rationality and reliability of the DeST software, showing the feasibility that software DeST can be applied to analyze the energy consumption of residential building in hot summer and cold winter zone.
通讯机构：
[Zhang, Jie] U;Univ S China, Sch Urban Construct, Changsha 421001, Hunan, Peoples R China.
会议名称：
International Conference on Green Building, Materials and Civil Engineering (GBMCE 2011)
会议时间：
AUG 22-23, 2011
会议地点：
Shangri La, PEOPLES R CHINA
会议主办单位：
[Zhang, Jie;Liu, Zehua;Liu, Yuanquan;Li, Huimin;Ning, Yongfei] Univ S China, Sch Urban Construct, Changsha 421001, Hunan, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
Deposition;Numerical simulation;Particle;Volume surface ratio of duct
摘要：
This paper discusses particle deposition in rectangle air-conditioning duct using RSM (Reynold Stress Model) and random trajectory particle model. Particle with nominal diameters of 10-200 mu m are simulated at each of three nominal air speed: 4m/s, 6m/s and 8m/s, respectively, in the cross-section sizes of 160x120, 500x250, 1000x320mm In simulation, the paper compares and analyzes the influence factors of particles deposition in volume surface ratio of the given duct. The results show that: 1) particle deposition velocity increases with volume surface ratio; 2) As the inlet air speed increasing, when the particles deposited to floor and vertical wall, the image of dimensionless deposition velocity Vs dimensionless relaxation time shows a coincident trend when the duct cross-section sizes are 500x250, 1000x320mm, but has great differences with the image of 160x120mm.
作者机构：
[Peng, X. Y.; Wan, F.; Liu, Z. H.; Xie, Q. F.] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称：
The 7th International Symposium on Heating,Ventilating and Air Conditioning(第七届采暖通风与空气调节国际会议 ISHV AC 2011)
会议时间：
2011-11-06
会议地点：
上海
会议主办单位：
[Peng, X. Y.;Xie, Q. F.;Wan, F.;Liu, Z. H.] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称：
The 7th International Symposium on Heating,Ventilating and Air Conditioning(第七届采暖通风与空气调节国际会议 ISHV AC 2011)论文集
关键词：
Large space building;Control -exhaust ventilation;Poison gas diffusion;Numerical simulation
摘要：
The control -exhaust mode of emergent ventilation, which uses the air jet from the slots to divide the large space into several sub -spaces, and to control the poison gas diffusion in the local area while discharge the poison gas completely, is put forward in this paper. By the method of numerical simulation, the ability were studied to control poison gas diffusion and the transportation process adopting the traditional up -exhaust mode of emergent ventilation or control -exhaust mode of emergent ventilation in the large space buildings. To conclude, it has been verified that the control -exhaust mode of emergent ventilation technology is correct and feasible. This mode can not only overcome the shortage that the up -exhaust technology lacks applicability to different poison gas, but also offer new design idea and technological means in designing the emergent ventilation engineering of the large space buildings.
会议论文集名称：
International Conference on Bioinformatics and Biomedical Engineering
关键词：
uranium ore;radon;pollution;environment
摘要：
The average level of indoor radon concentration for the residence in the uranium ore district is 282Bq/m(3) and the maximum value can up to 570 Bq/m(3) which exceed the national top limited value (200Bq/m(3)). Indoor radon pollution of the residence is very serious. In order to find out the reason of radon pollution, the main environmental factors are investigated. Through the calculations of Gaussian atmospheric diffusion model and simulation verificationthe it is found that the contribution of airborne pollution source terms including uranium mine ventilation shaft, heap leaching field and waste rock yards to indoor radon concentration is only 38.08Bq/m(3), accounting for 16.3% of the total indoor radon concentration. But the average value of indoor radon exhalation rate from the ground surface is 0.06 Bq/m(2)center dot s. By calculating, radon concentration caused by it is 154Bq/m(3), whose contribution to indoor radon concentration is 65.8%. It can be seen that indoor radon of the residence mainly comes from radon precipitation of the soil, followed by the radon in the atmospheric environment. The study can provide a reference to reducing radon pollution of the housing and radiation protection of the residents.
期刊：
FIFTH INTERNATIONAL WORKSHOP ON ENERGY AND ENVIRONMENT OF RESIDENTIAL BUILDINGS AND THIRD INTERNATIONAL CONFERENCE ON BUILT ENVIRONMENT AND PUBLIC HEALTH, VOL I AND II, PROCEEDINGS,2009年:541-547
通讯作者：
Chen, Gang
作者机构：
[Liu, Zehua; Chen, Gang; Fang, Yonglin] Univ S China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
通讯机构：
[Chen, Gang] U;Univ S China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
摘要：
As the building's outer wall consists of hollow blocks, the hollow hole will transfixion. According to the characteristic, this article proposes a technical method of indoor ventilation, which uses a hollow hole as channel and takes exhaust blower as the power which frequently use in the kitchen and bathroom, then carries on the simulation of ventilated effect for a typical room by the CFD method. With the analysis of the simulation result, the effect of ventilation is fine, and the method can solve the question effectively of city and countryside indoor air quality deterioration, and then achieves the goal of energy conservation.
期刊：
FIFTH INTERNATIONAL WORKSHOP ON ENERGY AND ENVIRONMENT OF RESIDENTIAL BUILDINGS AND THIRD INTERNATIONAL CONFERENCE ON BUILT ENVIRONMENT AND PUBLIC HEALTH, VOL I AND II, PROCEEDINGS,2009年:266-273
通讯作者：
Liu, Zehua
作者机构：
[Liu, Zehua; Zhou, Xiquan; Zhang, Jie; Meng, Lanmei] Univ S China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
通讯机构：
[Liu, Zehua] U;Univ S China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
摘要：
This paper integrality discusses particle deposition in rectangle air-conditioning duct Using RSM(Reynold Stress Model) and random trajectory particle model, and simulates particle deposition in each internal Surface of smooth horizontal duct. Particle with nominal diameters of 10 similar to 200 mu m were simulated at each of three nominal air speed: 4m/s, 6m/s, and 8m/s, respectively, in the cross-section size of 160 x 120, 500 x 250, 1000 x 320mm. In simulation, this paper compares and analyzes the influence factor of particles deposition in particle diameters, the average air speed of inlet, deposition orientation of internal Surface, volume surface ratio of the given duct in the rectangular air-conditioning duct. The results show that the main factor for particles deposition is particle diameters, the average air speed of inlet and the deposition orientation of the surface, in range of the referred particle diameters, dimensionless deposition rate increases with particle diameters and decreases with the average air speed of inlet, deposition to floors is higher than those to vertical wall and ceiling surface due to the gravity; particle deposition increases with volume surface ratio.
作者机构：
[Qinghai Luo; Zehua Liu] School of Urban Construction,University of South China
会议名称：
The First International Conference on Building Energy and Environment
会议时间：
2008-07-13
会议地点：
中国辽宁大连
摘要：
The steady state thermodynamic properties were compared between real thermoelectric and compression refrigeration systems. The irreversible losses of a thermoelectric refrigeration system represent th
摘要：
This paper analyzed the influence of neutral plane on natural ventilation in workshop. For several typical heights of neutral plane of a molding workshop, its influence on ventilation was simulated by means of CFD. In designing natural ventilation, to coordinate the dimensions between the inlet and outlet openings and. to play down the neutral plane properly may be the effective measures to increase ventilation efficiency. In supervising ventilation, the cooperation should be intensified between the inlet windows, the secondary windows and clerestories in order that airflow short-circuits may be avoided.
摘要：
Ventilation has been proved to be a main method, to eliminate radon and radon daughters of uranium mine. At present, in the uranium mine ventilation system, several problems are existed as follows: jumbled systems, serious air leakage, series ventilation, low effective air volume rate and unqualified rate of concentrations of radon and its daughters and so on. According to the practical rectifications of uranium mine ventilation system, some summarizing experiences of improving measures are presented in the paper, which include investigating radon source, controlling the direction and size of radon seepage, exerting the inhibition effects of ventilation, reducing air leak, increasing the ability of radon dilution and establishing complete ventilation system. In addition, a practical example is analyzed to introduce safety assessment method for uranium mine ventilation system.
