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Design of Evacuated Tube Solar Collector with Heat Pipe
Materials Today: Proceedings, 2017Abstract The Renewable source of energy is the future energy source that meets out our demand for energy. In this solar energy is one of the prime sources. The harnessing of the solar energy can be done in both ways Solar (PV), Solar Thermal. Solar thermal finds more suitable for domestic needs such as Space Heating, Cooling, Hot water systems ...
S. Siva Kumar +2 more
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Solar thermal networks operating with evacuated-tube collectors
Energy, 2018Abstract This paper addresses the design and specification of solar collector networks for the capture of solar radiation and its transformation into thermal energy for use in low energy intensity processes. All glass evacuated tube solar collectors are the type of technology considered in this work.
Guillermo Martínez-Rodríguez +2 more
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Exergy analysis of evacuated tube solar collectors: a review
International Journal of Exergy, 2018The most recent studies show that different methodologies have been adopted to understand the concept of Exergy in general and exergy efficiency, exergy destruction, exergy losses, etc. in particular. The present paper reviews the concept of evacuated tube solar water heating systems (SWHSs) followed by fundamental laws of thermodynamics necessary to ...
Gaurav Saxena, Manoj Kumar Gaur
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Performance Analysis of Solar Evacuated Tube Collector
Advanced Materials Research, 2013The high temperature operation of Evacuated Tube Collectors (ETC) and their very low radiant heat losses make them ideal for solar water heating, solar space heating, desiccant air conditioning, thermal driven cooling and industrial process heating applications. The work temperature of common ETC can reach 100~ 250°C. The vacuum tube envelope minimizes
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Flat-Plate and Evacuated Tube Collectors
2013Solar-energy collectors are devices employed to gain useful heat energy from the incident solar radiation. They can be of the concentrating or the flat-plate type. A simple flat-plate solar energy collector consists basically of an absorbing surface which absorbs the insolation and transmit it in form of heat to a working fluid commonly air or water. A
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An up-to-date review on evacuated tube solar collectors
Journal of Thermal Analysis and Calorimetry, 2020Since the last decades, solar energy has been used worldwide to overcome foreign dependency on crude oil and to control the pollution due to a limited source of non-renewable energy. Evacuated tube solar collectors are the most suitable solar technology for producing useful heat in both low and medium temperature levels.
Arvind Kumar +2 more
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Thermal modeling of evacuated tube solar air collectors
Solar Energy, 2015Abstract This paper presents a one dimensional thermal model of a solar evacuated tube open at both ends under transient conditions. Variations of fluid mass flow rate, ambient temperature, solar radiation, and wind speed are accounted for. The semi-analytical model relies on the energy conservation equation for small control volumes along the ...
Pierre-Luc Paradis +4 more
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Selective absorbing surface for evacuated solar collector tubes
Renewable Energy, 1999Abstract The absorptance of AlN-Al(absorbing coating)/Al solar spectrum(0.34 ≈ 2.5 μ m) selective absorbing surface, containing 8-layer AlN-Al composite materials and with distinctive or non-boundaries between the layers, deposited by sputtering technology and heat-treated at 400 °C (60min) is about 0.95 and its thermal emittance is close to 0.07 ≈ 0.
Yueyan Shi, Xiaoji Yang
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Gas heat conduction in an evacuated tube solar collector
Solar Energy, 1996Abstract We investigated experimentally the pressure dependency of the gas heat conduction in an evacuated plate-in-tube solar collector. A stationary heat loss experiment was built up with an electrically heated real-size collector model. The gas pressure was varied from 10−3 to 104 Pa, the temperatures of the absorber and the casing were held at ...
T. Beikircher, G. Goldemund, N. Benz
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The effect of dust accumulation on the performance of evacuated tube collectors
Solar Energy, 1994Abstract The aim of this article is to find the extent of performance decline of evacuated tube collectors due to dust accumulation over periods extending from 1 month to a whole year, and to get some quantitative information on the seasonal variation of dust accumulation.
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