نتایج جستجو برای: semispherical solar collector

تعداد نتایج: 124959  

The environmental pollution crisis caused by the excessive use of fossil fuels and the risk of the destruction of natural resources and reserves, as well as the excessive production of greenhouse gases and, consequently, global warming, led many energy researchers to use renewable energy As a fossil fuel alternative. Solar chimneys are one of the types of renewable energies that have been taken...

2011
Elisa Sani Luca Mercatelli Daniela Fontani Jean-Louis Sans Diletta Sciti

Related Articles Transformation of concentrated sunlight into laser radiation on small parabolic concentrators J. Renewable Sustainable Energy 3, 053102 (2011) A photovoltaic system with three solar cells and a band-stop optical filter J. Renewable Sustainable Energy 3, 023113 (2011) Parametric analysis of a coupled photovoltaic/thermal concentrating solar collector for electricity generation J...

2016
S. Sendhil Kumar S. N. Vijayan

Utilization of solar energy can be found in various domestic and industrial applications. The performance of any solar collector is largely affected by various parameters such as glazing, absorber plate, top covers, and heating pipes. Technology improvements have brought us another method for conversion of solar energy to direct electricity using solar photovoltaic system. Utilization and extra...

2015
Dilip Mishra

Energy is one of the essential requirements of livinghood. In present scenario conventional energy resources for producing energy to sustain our lives has become a necessity. Since these sources are depleting at faster rate and cost of energy is increasing simultaneously, so conversion of renewable form of energy is much desired and solar energy is a good resource. The present work is based on ...

2015
Guoying Xu Wei Chen Shiming Deng Xiaosong Zhang Sainan Zhao

Application of solar collectors for hot water supply, space heating, and cooling plays a significant role in reducing building energy consumption. For conventional solar collectors, solar radiation is absorbed by spectral selective coating on the collectors' tube/plate wall. The poor durability of the coating can lead to an increased manufacturing cost and unreliability for a solar collector op...

Journal: :international journal of nano dimension 0
s.e. ghasemi young researchers and elite club, qaemshahr branch, islamic azad university, qaemshahr, iran. gh. r. mehdizadeh ahangar department of mechanical engineering, yazd university, yazd, iran.

in the present work the effect of cu-water nanofluid, as heat transfer fluid, on the performance of a parabolic solar collector was studied numerically. the temperature field, thermal efficiency, mean-outlet temperatures have been evaluated and compared for the conventional parabolic collectors and nanofluid based collectors. further, the effect of various parameters such as fluid velocity, vol...

2016
Cheng-Wei Qiu Tie Jun Cui

Cheng-Wei Qiu, Tie Jun Cui, and co-workers present an all-dielectric semispherical lens with functions in shaping 3D wave-propagation paths in article 1600022. The cover image shows principle of the 3D superresolution imaging system, which includes a semispherical magnifying meta-lens and a planar focusing lens. The semispherical lens magnifies signals of the objects located at the core of lens...

Literature about entropy generation analysis of a wavy enclosure is scare. In this paper. a FORTRAN cod using an explicit finite-volume method was provided for estimating the entropy production due to the natural convection heat transfer in a cosine wavy absorber solar collector. The volumetric entropy generation terms both the heat transfer term and the friction term were straightly calculated...

2016
Suhail Zaki Farooqui

A new type of improved solar cooker based upon the use of a single vacuum tube is presented in this paper. The proposed cooker utilizes a solar collector consisting of parallel plane rectangular glass mirror strips mounted inside a wooden frame and requiring one dimensional solar tracking through a common driver. The proposed design can be either installed over the roof top of a house or near a...

2017
Camelia Stanciu Dorin Stanciu

A simple effect one stage ammonia-water absorption cooling system fueled by solar energy is analyzed. The considered system is composed by a parabolic trough collector concentrating solar energy into a tubular receiver for heating water. This is stored in a fully mixed thermal storage tank and used in the vapor generator of the absorption cooling system. Time dependent cooling load is considere...

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