نتایج جستجو برای: photovoltaic technology

تعداد نتایج: 488834  

Journal: :Nano letters 2012
Caofeng Pan Simiao Niu Yong Ding Lin Dong Ruomeng Yu Ying Liu Guang Zhu Zhong Lin Wang

Nanowire solar cells are promising candidates for powering nanosystems and flexible electronics. The strain in the nanowires, introduced during growth, device fabrication and/or application, is an important issue for piezoelectric semiconductor (like CdS, ZnO, and CdTe) based photovoltaic. In this work, we demonstrate the first largely enhanced performance of n-CdS/p-Cu(2)S coaxial nanowire pho...

2009
P. C. M. Bernardo Z. M. A. Peixoto L. V. B. Machado Neto

In recent years, the use of solar energy has become an alternative source of energy of great importance. Several researches and efforts have been concentrated on the improvement of the efficiency of photovoltaic systems and in the accessibility to this technology. In this sense, this work presents a buck converter controlled by P&O technique for the maximum power point tracking of the photovolt...

2014
Sheng-Yu Tseng Chien-Chih Chen Ching-Ting Huang

This paper presents an interleaved boost converter with coupled inductors for photovoltaic (PV) energy conversion. The proposed soft-switching boost converter uses an interleaved method to increase its power density and coupled-inductor technology to extend its step-up voltage ratio. To reduce switching losses of active switches, the proposed interleaved boost converter incorporates a synchrono...

2010
Filipa Reis Miguel C. Brito Victoria Corregidor João Wemans Gianfranco Sorasio

Concentration photovoltaic (CPV) systems are seen as a shortcut to achieve lower photovoltaic (PV) electricity costs/kWh. Within the available CPV configurations, V-trough systems are likely to succeed in the short term since they are less demanding in terms of tracking accuracy and due to their ability to make use of standard PV modules, a well-known and developed technology. However, silicon ...

2014
Nicholas R. Wheeler Yifan Xu Abdulkerim Gok Ian Kidd Laura S. Bruckman Jiayang Sun Roger H. French

The reliability of photovoltaic (PV) technology systems is a major concern to the PV industry, and the focus of much recent research activity. To ensure that these efforts return the maximum value for the resources invested, it is critical to design a study protocols that follow good statistical design principles, ensuring simplicity, avoidance of biases, minimization of missing data, reproduci...

2015
Yuan Xiaodong Zhao Yan Zhu Weiping

The maximum power point tracking (MPPT) controller in the Photovoltaic system is the key to verify all kinds of MPPT control algorithms. But the development of actual controller has the defects of needing long periods, artificial code writing and so on. RT-LAB real-time simulation platform is an advanced model-based engineering design and test application platform. The outstanding real-time per...

2001
Edwin Witt C. Edwin Witt

This paper describes the present status of photovoltaic technology and recent manufacturing progress obtained through the U.S. Department of Energy’s Photovoltaic Manufacturing Technology Project (PVMaT). Although barriers to the widespread use of photovoltaics—a clean and renewable energy—continue to exist, many of these barriers are cost-related and can be addressed through further research o...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان همدان - دانشکده ادبیات و علوم انسانی 1390

abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...

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