نتایج جستجو برای: rih wind

تعداد نتایج: 83534  

Amirmohammad Sattari Ashkan Irannezhad Pedram Hanafizadeh, Pouria Ahmadi Seyed Erfan Hosseinidoost

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...

ژورنال: علوم آب و خاک 2020

Wind erosion is known as one of the most important land degradation aspects, particularly in arid and semi-arid regions. Soil properties, by affecting soil erodibility, can control the wind erosion rate. The aim of this study was to attribute the soil physical and chemical properties to the wind erosion rate for the purpose of determining the most important property. To this aim, wind erosion r...

Journal: :جغرافیا و مخاطرات محیطی 0
عباس مفیدی محسن حمیدیان پور محمد سلیقه بهلول علیجانی

1. introduction wind is one of the important meteorological parameters which have an extensive application in environmental studies. the winds have various spatial and temporal scales regarding to their characteristics and structures. sistan wind as an outstanding low level flow in eastern iran is playing an important role to creation of local and regional climatic features. the sistan wind ini...

ژورنال: انرژی ایران 2018

Wind is one of the cleanest and cheapest renewable energies. One of the wind energy production technologies is use of small wind turbines installed in urban areas. However, installing these turbines in urban areas is associated with problems such as low wind speed and turbulence but if installed in the wrong location, their generated electricity is zero. In this study for the use of wind energy...

Journal: :دانش آب و خاک 0
محمد رضا حامی کوچه باغی گروه مهندسی آب دانشگاه تبریز امیر حسین ناظمی استاد- گروه مهندسی آب دانشکده کشاورزی دانشگاه تبریز علی اشرف صدرالدینی استاد- گروه مهندسی آب دانشکده کشاورزی دانشگاه تبریز رضا دلیر حسن نیا استادیار گروه مهندسی آب دانشکده کشاورزی دانشگاه تبریز

from the mathematical point of view, the fao penman-monteith equation shows a homographic function related to the wind speed. the homographic function has horizontal and vertical asymptotes. in this issue horizontal asymptote is applicable; because the vertical asymptote occurs for negative values of wind speed but the negative sign indicates the direction of the wind speed and only the absolut...

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...

Journal: :مهندسی بیوسیستم ایران 0
پریا سفیدپری دانشجوی دکتری مهندسی مکانیزاسیون کشاورزی، گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران علیرضا کیهانی استاد گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران سید حسن پیشگر کومله دانشجوی دکتری مهندسی مکانیزاسیون کشاورزی، گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران مجید خانعلی استادیار گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران اسداله اکرم عضو هیأت علمی گروه مهندسی ماشین های کشاورزی دانشگاه تهران

wind speed is one of the characteristics of wind energy which its data is extracted from meteorological stations. in this study, the data obtained from the weather station in the city eqlid during a ten-year period has been used. weibull distribution was chosen as the best distribution function using fitting tests and estimation of some statistical parameters. the results showed that the averag...

Ali Akhavein, Mahmoud Reza Haghifam Shohreh Monshizadeh,

A wind farm is a collection of wind turbines built in an area to provide electricity. Wind power is a renewable energy resource and an alternative to non-renewable fossil fuels. In this paper impact of wind farms in power system reliability is investigate and a new procedure for reliability assessment of wind farms in HL1 level is proposed. In proposed procedure, application of Fuzzy – Markov f...

Since the renewable resources of energy have become extremely important, especially wind energy, scientists have begun to modify the design of the wind turbine components, mainly rotor blades. Aerodynamic design considered a major research field related to power production of a small horizontal wind turbine, especially in low wind speed locations. This study displays an approach to the selectio...

حضوری, محمدامین, عباسپور, علی, فتوحی فیروزآباد, محمود, معینی اقطاعی, معین,

In recent years, due to environmental concerns together with rising costs of the fossil fuels, the wind energy usage in electricity generation of various countries has experienced a growing trend. Owing to inherent characteristics of wind turbines output generation, i.e. uncertainty in their output level as well as being undispatchable, the rapid growth of installed wind farms, however, has cau...

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