Results 291 to 300 of about 25,933 (342)
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, 2020
The effect of variation of longitude and latitude on the amount of solar radiation is investigated in this work in the Iranian climate context on different solar collectors and storage tank geometries.
Gholamabbas Sadeghi +4 more
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The effect of variation of longitude and latitude on the amount of solar radiation is investigated in this work in the Iranian climate context on different solar collectors and storage tank geometries.
Gholamabbas Sadeghi +4 more
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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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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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Solar Energy, 2019
In this paper, a solar water heating system (SWHS) with heat-pipe evacuated tube collectors (HP-ETC) is experimentally evaluated as a hydronic heated pavement system heat source.
J. Daniels, E. Heymsfield, M. Kuss
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In this paper, a solar water heating system (SWHS) with heat-pipe evacuated tube collectors (HP-ETC) is experimentally evaluated as a hydronic heated pavement system heat source.
J. Daniels, E. Heymsfield, M. Kuss
semanticscholar +1 more source
Numerical analysis of evacuated tube solar collectors using nanofluids
Solar Energy, 2019Abstract In this study, numerical analysis of water and water based nanofluids in ETSCs were made by using CFD. Validation of the study was made by comparing an experimental and two different numerical results. Thanks to the analyzes, the effects of water based Al2O3 H2O and CuO H2O nanofluids compared to water on heat transfer for different volume ...
Muhammed Mercan, Ali Yurddaş
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Optimum number and arrangement of evacuated-tube solar collectors under various operating conditions
Energy Conversion and Management, 2019Evacuated-tube solar collectors are featured by high outlet temperatures with a relatively high thermal efficiency and no direct environmental impacts. However, improper selection of the number of collectors and their arrangement, can lead to undesirable
Amr Kotb, M. B. Elsheniti, O. El-Samni
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Evacuated tube solar collector performance using CeO2/water nanofluid
Journal of Cleaner Production, 2018Abstract Nanofluids are the most attractive mean to enhance the performance of heat transfer devices. Several types of nanoparticles were utilized as they have high thermal conductivity. Renewable energy makes use of these nanofluids special in solar collectors.
M.A. Sharafeldin, Gyula Gróf
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Applied Energy, 2019
As one of the inexhaustible energy sources, solar energy as a means to provide space heating has been a public interest for decades. Many stand-alone solar thermal technologies have come into practice to replace the out-of-date systems.
Chunliu Mao +4 more
semanticscholar +1 more source
As one of the inexhaustible energy sources, solar energy as a means to provide space heating has been a public interest for decades. Many stand-alone solar thermal technologies have come into practice to replace the out-of-date systems.
Chunliu Mao +4 more
semanticscholar +1 more source
Energy Conversion and Management, 2018
This paper presents an experimental investigation of the performance of evacuated tube solar collectors integrated with Phase Change Materials systems. The performance of these systems depends on the thermal charging and discharging of the phase change ...
M. Essa, N. Mostafa, M. Ibrahim
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This paper presents an experimental investigation of the performance of evacuated tube solar collectors integrated with Phase Change Materials systems. The performance of these systems depends on the thermal charging and discharging of the phase change ...
M. Essa, N. Mostafa, M. Ibrahim
semanticscholar +1 more source
Assessment of electricity and hydrogen production performance of evacuated tube solar collectors
International journal of hydrogen energy, 2019In this work, a unified renewable energy system has designed to assess the electricity and hydrogen production. This system consists of the evacuated tube solar collectors (ETSCs) which have the total surface area of 300 m2, a salt gradient solar pond ...
Ayhan Atiz +3 more
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