نتایج جستجو برای: and yazdi wind

تعداد نتایج: 16848728  

Journal: :desert 2008
n. mashhadi s. feiznia

the result of wind dynamic (capacity and potential) is transport of soil or sediment particles and subsequent formative desert landforms based on the severity of erosion or sedimentation. the khartouran region, because of its geology, geomorphology and climatology conditions is a special place in the arid region on the closed basin of dasht-e-kavir. it is evident that the ecosystem balance of t...

Journal: :مرتع و آبخیزداری 0
طیبه مصباح زاده دانشجوی دکتری بیابان زدایی، دانشکده منابع طبیعی، دانشگاه تهران، ایران حسن احمدی استاد دانشگاه آزاد اسلامی، واحد علوم تحقیقات، تهران، ایران

sand dunes mobility is one of the serious problems in arid regions. since wind regime is one of the important factors in sand dunes formation, its frequency, direction and magnitude can be effective. amount of wind energy and its directional variability (wind regime) have significant control on the morphology and maintenance of aeolian landforms. by recognizing of morphometric and morphodynamic...

2015
M. Andalib

The genetic algorithm (GA) is an evolutionary optimization algorithm operating based upon reproduction, crossover and mutation. On the other hand, particle swarm optimization (PSO) is a swarm intelligence algorithm functioning by means of inertia weight, learning factors and the mutation probability based upon fuzzy rules. In this paper, particle swarm optimization in association with genetic a...

Journal: :energy equipment and systems 0
seyed-hadi mozafarpoor-khoshrodi electrical engineering, najafabad branch, islamic azad university, najafabad, isfahan, iran ghazanfar shahgholian electrical engineering, najafabad branch, islamic azad university, najafabad, isfahan, iran

one of the main problems in wind energy conversion system (wecs) is how to achieve maxim­u­m output power in different wind speeds. maximum methods for maximum power point tracking in wind energy conversion syst­e­ms require the knowledge of system characteristics and mechanic sensors. so, using these methods practically will follow with high price and an abundant difficulties. in this paper, n...

Wind environment in the populated built area especially in campus is important. This s tudy tes ted57 crossroad spots over of the whole campus in North China University of Technology (NCUT). The data of wind speed and direction were measured at fixed time and fixed place. The average, maximum values as well as the speed variation scale were calculated. Wind comfort criteria were adopted t...

Nowadays, optimal placement of wind turbines in a wind farm is one of the major concerns of the wind farm designers. This paper concentrates on the optimal placement of wind turbines in a wind farm. The optimal placement of wind turbines has been carried out to maximize the output energy and minimize the investment cost of cable, road and wind turbines. For this purpose, Firstly, it should be d...

Iran is a country completely dependent on fossil fuel resources. In order to obtain a diversity of energy sources, it requires other resources, especially renewable energy. Utilization of wind energy appears to be one of the most efficient ways of achieving sustainable development. The quantification of wind potential is a pivotal and essential initial step while developing strategies for the de...

D. Yu L. Hongjun L. Junnan L. Yalei X. Dapeng X. Lixiong Y. Zhanxin Z. Fang

For economic benefit of wind power generation, the equivalent conversion relationships and models between the different “quality” energy are studied deeply in the conversion processes of wind energy. Considering the effect of load demand characteristics and energy supply price on the wind energy utilization mode comprehensively, the multi-objective trans-utilization optimization model of wind e...

Journal: :پژوهش های جغرافیای طبیعی 0
مجید رضایی بنفشه دانشیار گروه جغرافیای طبیعی، دانشکدۀ جغرافیا و برنامه‎یزی، دانشگاه تبریز، ایران سعید جهانبخش استاد گروه جغرافیای طبیعی، دانشکدۀ جغرافیا و برنامه‎ریزی، دانشگاه تبریز، ایران یعقوب دین پژوه دانشیار گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه تبریز، ایران مرضیه اسمعیل پور دکتری تخصصی اقلیم‎شناسی در برنامه‎ریزی محیطی، دانشکدۀ جغرافیا و برنامه‎ریزی، دانشگاه تبریز، ایران

introductionin comparison with fossil fuels which pollute the lower layer of the atmosphere, use of windenergy has many environmental and economic advantages. wind is a clean and renewableenergy resource and use of the energy in the recent decades has been welcomed so much in theworld. energy plays an important role in the development of each society. all differentactivities including housing, ...

In this research paper, a 10 minute period measured wind speed data at 10 m, 30 m, and 40 m heights are presented for one of the major provinces of Iran. Four stations in Khuzestan- Abadan, Hosseyneh, Mahshahr, and Shushtar- are analyzed to determine the potential of wind power generation in this province. From the primary evaluation and by determining mean wind speed and also the Weibull f...

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