نتایج جستجو برای: renewable energy sources

تعداد نتایج: 929768  

2013
Chan Jung Park Junghoon Lee Seong Baeg Kim Jung Suk Hyun Gyung Leen Park

Due to the oil crisis and the insecurity of nuclear energy, the exploitation of renewable energy has attracted researchers’ attentions recently. In particular, to charge electric power in smart grid cities, it is important to integrate multiple renewable energy sources efficiently. Unlike the existing energy sources, the renewable energy sources such as wind and solar have low availability beca...

Climate change and the increasing population of countries have made the importance of greenhouses more important for future food security. One of the most important considerations in greenhouse production is the need of energy to create suitable greenhouse conditions. Therefore, in this paper, the problem of greenhouse energy planning with a focus on renewable energies will be investigated. To ...

2015
B. Harini

At present scenario, renewable energy sources are needed to meet the energy demand. They also mitigate environment pollution problems. The shortage of electrical energy demand can be meeting with renewable energy resources. A wind turbine (WT) and photovoltaic (PV) solar panels are primary energy sources. Grid connected renewable energy source like wind energy and solar energy are used to conne...

2015
George Halkos Nickolaos G Tzeremes Panayiotis G Tzeremes

This paper by using Long-range Energy Alternatives Planning System (LEAP) constructs four different renewable energy scenarios for the Greek transport, energy, and industry sectors. By projecting the demand for renewable energy and the associated resulting carbon dioxide emissions up to the years 2020 and 2030, the paper applies in a second stage data envelopment analysis (DEA) evaluating the G...

Journal: :energy equipment and systems 0
alireza noorpoor graduate faculty of environment, university of tehran, tehran, iran parisa heidarnejad graduate faculty of environment, university of tehran, tehran, iran nasim hashemian graduate faculty of environment, university of tehran, tehran, iran amir ghasemi graduate faculty of environment, university of tehran, tehran, iran

integrated energy systems utilizing renewable sources are sustainable and environmentally substitutes for conventional fossil-fired energy systems. a new multigeneration plant with two inputs, such as biomass and solar energy, and four useful outputs, such as cooling, heating, power, and distilled water, is presented and investigated in this paper. the proposed system includes evacuated tube so...

2013
Sina Hamzehlouia Afshin Izadian Sohel Anwar

The utilization of renewable energies as an alternative for fossil fuels is considerably growing due to an increasing environmental concern and exhaustion of fossil fuels [1-3]. Transportation electrification is one way to replace or reduce fossil fuels with renewable energy sources. Several propulsion systems including hybrid electric vehicles and plug in hybrid electric vehicles have been int...

2011
Mohsen Bashir Javad Sadeh

Using hybrid renewable energy is one of the best alternatives to supply the electrical energy at remote areas. Renewable energy sources are depended to weather conditions or other factors, so for supplying load with renewable sources appropriate capacity of these sources should be selected. In determining the capacity of renewable energy such as wind and solar, considering the stochastic nature...

2013
D. Bhattacharyya

Complex power generation scheduling, correlated uncertainties, environmental issues and hybrid energy system modeling have become very important research topics due to rapid growth of large-scale distributed renewable energy system, deregulated electric power markets and responsive demand. The intermittent nature of the primal energy sources (i.e. wind, sun, water) increases uncertainty as well...

Journal: :CoRR 2018
Ashkan Zeinalzadeh Donya Ghavidel Vijay Gupta

The intermittent nature of the renewable energies increases the operation costs of conventional generators. As the share of energy supplied by renewable sources increases, these costs also increase. In this paper, we quantify these costs by developing a market clearing price of energy in the presence of renewable energy and congestion constraints. We consider an electricity market where generat...

Journal: تعلیم و تربیت 2018
E. Saalehi Omraan, Ph.D., G. Mehralitabaar Firoozjaa’i, M. Aabedini Beltork, Ph.D.,

Content Analysis of Elementary School Textbooks in Terms of Covering Renewable Energy Sources     E. Saalehi Omraan, Ph.D.* M. Aabedini Beltork, Ph.D.** G. Mehralitabaar Firoozjaa’i***   The world is facing an energy crisis brought about by the ever increasing consumption of fossil fuels that leads to pollution and health problems. The renewable clean energies must b...

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