نتایج جستجو برای: energy system

تعداد نتایج: 2760013  

ژورنال: انرژی ایران 2020

Rapid advances in new sciences and technologies result in high penetration of smart devices and services in daily life. In this regard, smart buildings are one of the prominent examples which have dramatically improved not only the accuracy and efficiency of buildings but also the speed of daily routines. Recently, integration of the cutting-edge technologies has been traversing from residentia...

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 pape...

برکاتی, سید مسعود, یزدان پناه جهرمی, محمد علی,

Energy is one of the most important requirements in development of societies. In the last decade, widespread attention has been paid to renewable energies. Despite the obvious advantages of renewable energy resources, their dependence on climate change is one of the most fundamental problems facing to the development of them. Optimal design of hybrid renewable energy systems is a major issue in...

Reducing fossil energy resources and increasing greenhouse gases necessitate the need of clean sources of energy. One of the sources of renewable energy is wind power which has been developed in recent years. Sometimes, wind power in peak hours does not respond. Hence, a storage system and backup power for such power plants seem necessary. In this study, a hybrid system, consisting of electroly...

Ghazanfar Shahgholian, Seyed-Hadi Mozafarpoor-Khoshrodi

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 pape...

Journal: :تحقیقات مهندسی کشاورزی 0
نیکروز باقری دانشجوی سابق کارشناسی ارشد علیرضا کیهانی دانشیار گروه مکانیک ماشین های کشاورزی دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران سید سعید محتسبی استاد گروه مکانیک ماشین های کشاورزی دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران رضا علیمرانی دانشیار گروه مکانیک ماشین های کشاورزی دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران

monitoring the effective parameters of drying crops is necessary to evaluate and determine system performance under real conditions. hence, a monitoring system was constructed to determine the performance of a vegetation forced-convection solar dryer. digital temperature sensors were set up in the air inlet and outlet of the collector and the air outlet of the drying chamber. a program was writ...

Journal: :journal of chemical and petroleum engineering 0
hossein ahamdi danesh-ashtiani islamic azad university of south tehran branch. hamid abdollah-zargar islamic azad university of south tehran branch.

utilization of fossil fuel for supplying of requires energy of desalination systems is common. on the other hand, solar energy is one of the high-grade energies in the world that can be found specifically in hot weather places. therefore, utilization of solar energy for operation of desalination systems will reduce greenhouse gases and is a good alternative way. common exergy analysis method (s...

Journal: :تحقیقات نوین در برق 0
محمد صفرعلی نجار mohammad safar ali najjar محسن صنیعی mohsen saniei

abstract: enviromental concerns, improvements in renewable energy technologies, governmental incentives for the use of these resources, and increased t&d; costs, are the main factors driving the energy sector into a new era, where considerable portions of electrical demand will be met through widespread installation of distributed energy resources (ders). the virtual power plant (vpp) is a dece...

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