共查询到20条相似文献，搜索用时 31 毫秒
1.
The geothermal water of Nanwenquan,Xiaoquan and Qiaokouba is a whole geothermal water system in Nanwenquan anticline of Chongqing.In the past,due to lack of study on sustainable exploration of the geothermal water,the source of geothermal water from Nanwenquan and Xiaoquan was drying up.Now,three enterprises are exploiting the geothermal water in Qiaokouba.There must be a sustainable exploration for the geothermal water,in order to utilize and protect the geothermal water resource.The geothermal water in the three exploiter's areas was quantitatively studied on sustainable exploitation by finite element numerical simulation.The geological mode was generalized and the mathematical model was established.Then,the simulative water level obtained was compared with the actual one,and the mathematical model was identified and adjusted.The right mathematical model has been acquired when the simulative water level obtained was approximate to actual water level.The infiltration of geothermal water was simulated under two schemes of exploitation conditions.An optimum scheme has been obtained by analysis.The maximal yield of exploitation was acquired under sustainable exploitation of the geothermal. 相似文献
2.
In Chongqing,the South Hot Spring,Small Hot Spring,and West Hot Spring,do not flow automatically;the flux of North Hot Spring and East Hot Spring Have fallen.The geothermal water did not flow through the geothermal water hole of East Hot Spring.However,the exploitation of "city of hot spring" is plan after 5 year.The paper discusses the hydro-geological conditions,the dynamic hot springs and correlativity among hot springs,analyzes the replenishment conditions and capacity of store water,and the correlativity among the exploitation points of "city of hot spring".It shows that the exploitation of "city of hot spring" is feasible.But in order to exploit "city of hot spring" sustain-ably,the whole yield of "city of hot spring" along with should be planned the every hot spring yield in a geothermal water system of anticline. 相似文献
3.
In order to optimize design and operation, it is necessary to calculate accurately hydraulic characteristics large central air-conditioning systems. Simplified Model can not be applied to hydraulic calculation of large pipe network topological structure for its large calculation error. Taking into account the regulating characteristics of terminal branch temperature regulating valve, a direct-return chilled water system is studied, an accurate mathematical model of pipe network hydraulic characteristics has been established and a computer logic algorithm with virtual flow has been given. A direct-return pipe network with ten AHU branches is used as simulation calculation object, the pipe network supply-return water pressure difference is calculated, and also the temperature regulating valve opening and actual flow of each branch are calculated in the condition of different supply-return water pressure difference. The calculated results accord with the natural characteristics of high pressure difference unbalanced for direct-return pipe network. The calculation method can ensure calculation convergence. 相似文献
4.
System of the Geothermal Water in the Nanwenquan Anticline 总被引：1，自引：0，他引：1
In order to exploit and protect the geothermal water scientifically, the chemistry and isotope of geothermal water are studied in Nanwenquan anticline. It is show that the geothermal water comes from atmosphere precipitation in the north of Tongluoxia anticline, in which the Tongluoxia anticline and Nanwenquan anticline are whole geothermal water system. The geothermal water flows from north to south. The geothermal water has hydraulic contact from north to south, from the western limb to eastern limb. The geothermal waters in Nanwenquan anticline are whole geothermal water system. Every exploration of the geothermal water in Nanwenquan anticline should layout. So it can avoid that the yield is higher than pondage, and the geothermal water source environment is destroyed. The study provides theoretical gist for exploiting and utilizing rationally and protecting geothermal water resource effectively. 相似文献
5.
The one dimension mathematical model has been adopted to study the projects of the daily regulation of hydroelectric station: the implicit format of Preissmann has been adopted to solve the equation.The program of one dimension unsteady flow has been worked out.The result of calculation of the program has been verified by the result of the physical model and the coincide well.Under 4 kinds of projects of the daily regulation of Jinghong Hydroelectric Station,the unsteady flow conditions in lower reaches of the dam with the length of about 85km have been calculated by the program.The graph has been adopted to analyze the important characteristic parameters of the unstable flow conditions of 4 kinds of projects: the range of water level per day,the range of water level per hours and the range of water level per 20 minutes.Finally,the project of the daily regulation of Jinghong Hydroelectric Station which has a smallest influence on the navigable flow conditions has been obtained. 相似文献
6.
针对气体射流冲击干燥技术,试验研究了不同风温、风速和预处理下无核紫葡萄的4种薄层干燥模型。在对无核紫葡萄进行L9(34)正交干燥试验的基础上,通过试验数据分析,对不同风温下的干燥曲线进行模型比较,经拟合得出适合无核紫的数学模型为Page模型。 相似文献
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A modeling method based on DSM is introduced. In circumstance of iterative task, the ways concerning about the input of data,the generation of stochastic variables and the set of the simulation clock are dipicted. While considering the learning curve of activities, the way is studied express the movable process of a single project and then list the corresponding Monte Carlo simulative block diagram .The program based of EXCEL VBA is also written. The result of a given simulative example shows that the method can simulate complex design activities and plan the project in terms of scientific basis. 相似文献
9.
Zhong Jingxiao 《保鲜与加工》1989,(4)
This paper introduces the metod of optimal design of municipal water distribution,The main points are the theory,mathematical model,program frame figure and example in practice of the optimal method of hydraulics.The
program is applicable to the design and calculation of the pipe network in a city. It gives a simple and convenient calculation method for multiple-scheme design and scheme cmparison of water supply system. 相似文献
10.
With societal development, wastes exist in industry, agriculture and human life. In particular, a large volume of urban industrial sewage is discharged and pesticides and fertilizers are widely used, leading to groundwater pollution in many areas. Based on a water quality model of hydrodynamic dispersion and the multi element balance (MEB) method, a general program for simulating groundwater flow and quality is carried out using the program VC++ for visual presentation. Using this program in a case study, the transportation mechanism of groundwater flow and quality is simulated numerically. The result indicates that the program is visual and can be manipulated well. It offers a point of reference for the reasonable exploitation, protection and utilization of the groundwater. 相似文献
11.
Numerical Simulation and Analysis of Control Rod Dropping of Qingshan 300 MW Nuclear Reaction 总被引：1，自引：0，他引：1
This paper provides a theoretic basis to analyze the mechanism of control rod dropping and a solution method to solve the process of dropping. The authors analyze the effect of different forces acting on the control rod in detail. A mathematical model is built and a program is written to solve the process of downward motion. Finally, the model and relative coefficients of the model are modified according to the experimental data. The modified model can well simulate the process of dropping of the control rod, which gives a powerful proof to the accuracy of the model. 相似文献
12.
Wang XiaoruMi Linshu 《保鲜与加工》1990,(3)
Based on the experiment, magnetizing characteristic and its mathematical model of iron for the reactance transformer DKB has been studied in this paper. Its simulating calculation model has been achieved and implemented by program. The result of the simulation is satisfactory compared with that of the experiment. 相似文献
13.
湖北省水资源供需平衡及其承载力 总被引：3，自引：2，他引：1
以湖北省为研究区域,运用水资源负载指数和水资源供需平衡模型,采用数理统计方法,定量计算和分析了湖北省近年来的水资源供需平衡态势以及湖北省市域尺度的水资源开发潜力;在水土平衡分析、水资源供需状况评价与水资源开发潜力评价的基础上,从资源平衡关系入手,采用水资源承载指数等指标,对2000—2012年省域与市域2个层面的水资源平衡状况进行了定量研究。结果表明：湖北省人均水资源量居全国平均水平。湖北省属于水资源利用程度较高、开发利用条件较好、水资源开发潜力较大的省区。湖北省水资源承载力有限,随着未来人口的增加以及工农业的快速发展,在现有的水资源量基础上,水资源短缺将会成为湖北省中东部城市的发展瓶颈。 相似文献
14.
The physical and mathematical model of three dimensional unsteady coupled heat transfer in the ground heat exchanger is proposed, and corresponding numerical simulations for actual ground heat exchanger and operation condition are carried out. The computed results are compared with those of the thermal resistance test of the ground heat exchanger, which proves the correctness of the model and corresponding numerical methods. Then, the effects of thermal conductivity and specific heat of the ground backfill material on the ground heat exchanger are investigated, which provides theoretical guidance for the thermal response test and the engineering design of the ground heat exchanger. 相似文献
15.
利用数学模型对高炉冶炼过程进行模拟是高炉炼铁新工艺研发的有效方法,网格生成技术是数值模拟过程中重要的前处理过程,是高炉模拟计算的先决条件。生成网格的质量对高炉模型模拟的精度、效率以及收敛性具有重要影响,因此,建立优质的网格对高炉数学模型的求解具有重要意义。文中提出了一种适用于高炉数学模型的适体坐标系(BFC)网格的生成方法,从求解区域的划分、椭圆型方程的转换、椭圆型方程的离散及BFC网格生成步骤等方面进行了研究,并把死料区的边界作为BFC网格计算的边界条件,使数学模型的求解过程得以简化。采用带有源项的泊松方程作为变换方程,网格的正交性和疏密程度便于控制。该网格生成算法原理简单、易于编程、网格生成效率高,生成的网格能够满足数学模型求解的要求。 相似文献
16.
Analysis of Equilibrium Runing Lines of Engine and Hydraulic Torque Converter for a Vehiele with CVT
The mathematical model of the torque converters is established based on test results. Equilibrium running lines of engine and hydraulic torque converter are analyzed. The idea of matching and controlling is put forward for CVT vehicle with torque converter in starting ability, crawl ability and fuel economical efficiency, which lays a foundation for the exploitation of CVT vehicle with torque converter. 相似文献
17.
不同灌溉模式对小麦‘烟农5158’光合特性及产量的影响 总被引：1，自引：0，他引：1
为了明确在胶东地区气候条件下‘烟农5158’适宜的灌溉模式,笔者在大田条件下研究了不同灌溉模式对‘烟农5158’生理特性、产量及产量三因素的影响。结果表明：随着灌溉次数的增加,‘烟农5158’旗叶相对含水量、旗叶最大光化学效率(Fv/Fm)、光合速率提高。‘烟农5158’叶片相对含水量、实际羧化效率和光合速率高于‘鲁麦21’,说明‘烟农5158’的抗旱性强于‘鲁麦21’。干旱显著降低‘烟农5158’和‘鲁麦21’的产量,‘烟农5158’的产量显著高于‘鲁麦21’。3个灌溉处理相比较,春灌2水处理（拔节水和开花水）处理的小麦产量较高。 相似文献
18.
Based on solving the actual problems in the condition of the rapid growing necessity of elderly residence in China, this essay introduces the experience of building the elderly residence in Catalonia autonomic district in Spain. It is a progress of thirty years development under the supervising of the autonomic government full with social and human care conscious, which gives a good example which is different from the American model, to the related organizations as a new reference for establishing the advanced elderly residence program in China. 相似文献
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20.
Analytical and Experimental Study on Performances of MR Fluid Dampers Employing Plates Channel Model
The numerical model,which combines the two-dimensional river model and ship maneuvering mathematical model,is built.The influence of Nanjing Fourth Bridge to be built across the Changjiang River on river's condition is studied.The change of river conditions around the Bridge pier is analyzed and the tracks of ship transit along the reach of the Changjiang River are simulated for the cases of before and after building the Nanjing Fourth Bridge.The parameters of navigation in sail course have been obtained.The result shows that the influence on rivers condition of the Nanjing Fourth Bridge on Changjiang River is very small,and its influence on navigation is not significant. 相似文献