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Application of the Weibull Distribution to Estimate the Volume of Water Pumping by a windmill

Journal of Power and Energy Engineering 2016年第9期4卷 36-51页

作者： M. Toledo Velázquez J. Herná ndez Rodrí guez M. Vega Del Carmen F. E. Flores Murrieta G. Tolentino Eslava Laboratorio de Ingenierí a Té rmica e Hidrá ulica Aplicada (LABINTHAP) IPN-SEPI-ESIME Zacatenco Ciudad de M&eacute xico M&eacute xico Divisió n de Ciencias e Ingenierí a Laboratorio en Sistemas de Energ&iacute a Universidad de Quintana Roo Chetumal M&eacute xico

Given the steady increase in use of alternative energy sources to supply part of the energy demand of the world, and considering that Mexico has enough wind resources to produce all the electricity required by the country, in this work, it is carried out the development of a system of wind resource assessment to determine the volume of water that a windmill pumping system can provide in a specific area. To this end, it has developed a computer program for wind resource assessment by measurements of wind speed, direction, temperature, barometric pressure and relative humidity. Measuring equipments were mounted in a wind measurement tower of 10 m high, within the premises of the University of Quintana Roo which is located along the coast. Until this day, there are records over a period of five months of the variables of wind speed, wind direction, temperature, relative humidity and atmospheric pressure. These variables were used for statistical calculations using the Weibull distributions. To give a better use of the calculated data, they were applied to the evaluation of a Pumping System.

关键词： Pumping Systems Weibull Distribution Wind Energy windmill

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Numerical Simulation and Performance Analysis on windmill Starting Process of Small Turbojet Engine

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Defence Technology（防务技术） 2011年第3期7卷 145-152页

作者：杨欣毅田宇朱旭程周源李冠军 Naval Aeronautical and Astronautical University Detachment 92 Unit No.92941 Naval East China Sea Fleet 19 division

A new simulation strategy is proposed for the starting process of missile turbojet engine windmill. The starting process of windmill before ignition is simulated using a radial basis function neural network (RBFNN) , and the acceleration process after ignition which model is a set of nonlinear equations is solved using a particle swarm optimization (PSO) algorithm. The introduction of PSO helped to tackle the problem of divergence caused by traditional iteration methods. The calculated result is in a great agreement with test data, which shows that the presented model has a high accuracy. The starting processes are simulated at different ignition times, and the results are analyzed synthetically. The analysis shows how the ignition time affects the starting performance of engine windmill. The method offers a useful tool for ignition time optimization as well as engine starting performance analysis.

关键词： missile propulsion turbojet engine windmill moving least squares particle swarm optimization

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Assessment of the Rural Water Supply Potential by Mechanical Wind Pumping Around the Floodplains of Lake Chad

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Energy Engineering 2021年第4期118卷 931-945页

作者： DieudonnéKaoga Kidmo Bachirou Bogno Kodji Deli Michel Aillerie University of Maroua MarouaCameroon Universitéde Lorraine LMOPS-EA 4423Metz57070France CentraleSupélec LMOPSMetz57070France

In the present work,an assessment of the rural water supply potential by mechanical wind pumping around the floodplains of Lake Chad has been *** the floodplains around Lake Chad,available surface water is largely contaminated and represents health hazards to *** to underground and clean water has increasingly become ***,clean water scarcity has led to conflict and territorial pressures,which are contributing factors to poverty in the considered *** localities,Baga,Baga-Sola,Makari and Nguigmi,respectively,in Nigeria,Chad,Cameroon and Niger have been selected inside the floodplains around Lake Chad,to evaluate the potential of wind power and prospects of windmills development to provide safe drinking-water supply,livestock watering and small-scale ***-term satellite-derived data,obtained through the Prediction of Worldwide renewable Energy Resources have been considered suitable and viable alternative to missing site-specific data from ground *** of Multi-blade driven piston pump is the preferred water pumping option for this study because of its higher overall system *** results of this study indicate that mean wind speeds,at 10 m height above ground level,are 4.64 m/s for Baga,4.76 m/s for Baga-Sola,4.32 m/s for Makari and 4.44 m/s for *** addition,wind speeds for Baga,for instance,are in the range of 2.5–10 m(working range of a wind pump),at 10,15,20 and 25 m height agl,for 79.64,82.80,84.79,and 86.19 per cent of the *** values for Baga-Sola,Makari and Nguigmi are in the range of 80.50–87.76 per cent,76.86–85,58 per cent,77.92–86.21 per cent,*** a windmill with a 2 m-blade,a 25 m-height tower and considering a total dynamic head of 30 m,average monthly discharges for the dry season are 1,330,1,374,1,200 and 1,199 m3,respectively for Baga,Baga-Sola,Makari and ***,corresponding costs of water are 9.53,9.23,10.56 and 10.57 XAF/m3,for B

关键词： Wind energy windmill water pumping lake chad

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An Experiment on Power Properties in a Small-Scaled Wind Turbine Generator

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Journal of Power and Energy Engineering 2013年第7期1卷 6-13页

作者： Jee-Ho Kim Hyun-Dai Yang Kyu-Jin Lee Sung-Do Song Sung-Hoon Park Joong-Ho Shin Department of Mechanical Design & Manufacturing Changwon National University Changwon 641-773 Korea.

This study configures a simple wind tunnel using a blower for generating wind energy, which is equivalent to natural wind, and a test system that measures properties of power. Also, the mechanical and electrical power in a small-scaled wind turbine are empirically measured to analyze the relationship between the mechanical and electrical power.

关键词： Small-Scaled Wind Turbine Vertical Axis windmill Gearbox Mechanical Power Electrical Power

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房総の风车ポンプの起源と発展

机械技术史

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机械技术史 1998年 271-276页

作者：佐藤建吉千叶大学工学部

The origin of windpumps utilized for irrigating paddy fields in Maruyama Town in Boso-area was identified as Isumi-district in the same *** windpumps were developed by farmers and smiths around the year *** local conditions such as geometry,climate,irrigation,and technical ability in Boso-area developed and spread the wind *** the windpumps were replaced by introducing of small-size petroleum prime motors in 1950’s.

关键词： History of Technology Windpump windmill Technical Transfer

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