TAILIEUCHUNG - Renewable Energy Part 13

Tham khảo tài liệu 'renewable energy part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 414 Renewable Energy Wurfel P. 2005 . Chapter 1. Introduction of Physics of Solar Cells From Principles to New Concepts 2005 WILEY-VCH Vewrlag gmbh Co. kgaa Weinheim. ISBN 3-52740428-7. Zhang P. Sadler . Lyon . Martonosi M. 2004 . Hardware Design Experiences in ZebraNet ACM Conference on Embedded Networked Sensor Systems SenSys Baltimore Maryland USA November 3-5 2004. 22 The Temperature Dependant Efficiency of Photovoltaic Modules - a long term evaluation of experimental measurements Jan Machacek Zdenek Prochazka and Jiri Drapela Brno University of Technology Czech Republic 1. Solar energy use energetic potential of the Sun The Sun as energy source All energy existing on the Earth comes from the Sun. This energy can be present in the chemical form in fossile fuels as biomass energy in plants and animals as luminous energy contained in the falling radiation or as thermal energy which affects processes in the atmosphere and the circulation of water in the environment. At the heart of the Sun nuclear fusion takes place - the fusion of hydrogen nuclei during which helium and other heavier elements are formed. Every second the Sun changes approximately 600 million tonnes of hydrogen into helium. According to the well-known Einstein s formula E m c2 the difference between masses can be converted to energy. That is million tonnes of mass is transformed on the Sun every second which results in the production of about J of energy. The Sun as a star is now in a stable phase of its development which lasts some billion years and is assumed to continue for about another 5 billion years. From the perspective of human life and human society it is therefore an inexhaustible source of energy. It is assumed that at the end of this stable phase the Sun will approximately enlarge its volume exhaust the supply of hydrogen in its core a thin layer of hydrogen enveloping its core ignites the core shrinks as a result. The inner part of the Sun will .

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