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flat-plate-solar-collectors
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Experimental investigation of the effect of using closed-loop pulsating heat pipe on the performance of a flat plate solar collector
, Article Journal of Renewable and Sustainable Energy ; Volume 5, Issue 1 , 2013 ; 19417012 (ISSN) ; Mamouri, S. J ; Shafii, M. B ; Rahni, M. T ; Sharif University of Technology
2013
Abstract
In this study, performance of a flat plate solar collector operating in conjunction with a closed-loop pulsating heat pipe is investigated experimentally. The experiments were carried out in Yazd, Iran. The experimental setup consisted of a flat plate solar collector, pulsating heat pipe, and a tank. The pulsating heat pipe's evaporator is located inside the flat plate collector. In order to investigate the effect of the evaporator length on the efficiency of the system, three different length collectors are manufactured in the evaporating section. In addition, the effects of the pulsating heat pipe filling ratio, inclination angle, and flow rate are investigated for each collector...
Simultaneous energy storage enhancement and pressure drop reduction in flat plate solar collectors using rotary pipes with nanofluid
, Article Energy and Buildings ; Volume 239 , 2021 ; 03787788 (ISSN) ; Rostamzadeh, H ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Flat plate solar collectors waste a massive part of the heat accumulated near the contact region, mainly due to poor thermal characteristics of working fluid. The demanding power for pumping the flow through the pipes seems a permanent concern in solar collectors. Also, active methods seem not to be applicable in such systems due to the external energy requirement and cost associated with it. An innovative and simple technique is considered here to eliminate such deficiencies all at once by equipping the flat plate collector with rotary absorber pipes and Fe3O4/water nanofluid. Results indicate that the applied method improves the convection mechanism in each pipe by mixing the accumulated...
Year-round outdoor experiments on a multi-stage active solar still with different numbers of solar collectors
, Article Applied Energy ; Volume 152 , 2015 , Pages 39-46 ; 03062619 (ISSN) ; Karimi Estahbanati, M. R ; Jafarpur, K ; Roostaazad, R ; Feilizadeh, M ; Taghvaei, H ; Sharif University of Technology
Elsevier Ltd
2015
Abstract
The present work investigated the outdoor performance of a basin type multi-stage solar still as well as the effect of collector over basin area (CBA) ratio on the distillate production. The effect of CBA was studied in outdoor experiments for the first time. The system consisted of a still coupled with one, two or three flat-plate solar collectors. In order to study the effect of CBA more accurately, the experiments were conducted in both winter and summer. In these experiments, the distilled water production of the multi-stage still was measured during the whole 24. h of a day on an hourly basis. The results revealed that in the winter, the basin coupled to one solar collector (CBA. =...
Different operational alternatives of aquifer thermal energy storage system for cooling and heating of a residential complex under various climatic conditions in Iran
, Article Scientia Iranica ; Volume 26, Issue 3B , 2019 , Pages 1281-1292 ; 10263098 (ISSN) ; Bahadori, M. N ; Saidi, M. H ; Sharif University of Technology
Sharif University of Technology
2019
Abstract
In this research, a confined aquifer with low groundwater flow was considered to meet the cooling and heating requirements of residential complexes. The complexes were located in the cities of Ahvaz, Ardabil, Bandar Abbas, Esfahan, Kerman, Rasht, Tehran, and Zahedan. The complex in Ardabil mostly required heating, the ones in Ahvaz and Bandar Abbas mostly required cooling, and the complexes in other cities required both heating and cooling. Four different alternatives of Aquifer Thermal Energy Storage (ATES) were analyzed in this study. These alternatives consisted of using ATES: 1) alone for cooling, 2) coupled with a conventional refrigeration system or a chiller for cooling, 3) by...
Different operational alternatives of aquifer thermal energy storage system for cooling and heating of a residential complex under various climatic conditions in Iran
, Article Scientia Iranica ; Volume 26, Issue 3B , 2019 , Pages 1281-1292 ; 10263098 (ISSN) ; Bahadori, M. N ; Saidi, M. H ; Sharif University of Technology
Sharif University of Technology
2019
Abstract
In this research, a confined aquifer with low groundwater flow was considered to meet the cooling and heating requirements of residential complexes. The complexes were located in the cities of Ahvaz, Ardabil, Bandar Abbas, Esfahan, Kerman, Rasht, Tehran, and Zahedan. The complex in Ardabil mostly required heating, the ones in Ahvaz and Bandar Abbas mostly required cooling, and the complexes in other cities required both heating and cooling. Four different alternatives of Aquifer Thermal Energy Storage (ATES) were analyzed in this study. These alternatives consisted of using ATES: 1) alone for cooling, 2) coupled with a conventional refrigeration system or a chiller for cooling, 3) by...
Energy performance and economic feasibility of hot spring-based district heating system – A case study
, Article Energy ; Volume 211 , 2020 ; Hakkaki Fard, A ; Jafari Mosleh, H ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
As a versatile platform for integrating renewable energies, District Heating systems (DHSs) offer a pragmatic approach toward an environmentally benign and sustainable future. This paper puts forward the feasibility evaluation of using geothermal hot spring source Heat pumps (HPs) for district heating of a village situated in the north-west of Iran, with a cold mountain climate. Solar collectors are also integrated into the DHS as a supplementary heat source. To this aim, three different renewable-energy-based district heating scenarios, viz. a Ground-Source-HP-based (GSHP), a combined GSHP-flat-plate-solar-collector (GSHP-SFPC), and a combined GSHP-linear-parabolic-solar-collector...
Design and evaluation of flat plate solar collector equipped with nanofluid, rotary tube, and magnetic field inducer in a cold region
, Article Renewable Energy ; Volume 170 , 2021 , Pages 574-586 ; 09601481 (ISSN) ; Rostamzadeh, H ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Flat plate solar collectors lose a massive part of heat accumulated near the contact region because of the poor thermal characteristics of the working fluid. A new cost-effective design is numerically studied to cover up such deficiency by equipping the flat plate collector with revolutionary tubes and magnetic field inducer to affect Fe3O4/water working nanofluid in the collector tubes. Results substantiate that each of the applied rotary tubes and magnetic field inducer improves the convection mechanism in the tubes by circulating the flow inside the tubes and saves more of available solar energy. Results reveal that 27.8% and 10.44% of lost energy are restored in the solar collector...
Optimization of a novel photovoltaic thermal module in series with a solar collector using Taguchi based grey relational analysis
, Article Solar Energy ; Volume 215 , 2021 , Pages 492-507 ; 0038092X (ISSN) ; Parcheforosh, A ; Salari, A ; Ma, T ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
The solar collectors absorb solar irradiation and then produce thermal energy; however, they cannot generate electrical power. Electricity and thermal energy can be produced by the photovoltaic thermal module, simultaneously, while the outlet temperature of the photovoltaic thermal module is not usually high enough to provide thermal requirements of a building such as hot water or space heating. This work proposes a novel compound system created by the connection of a solar collector in series with a photovoltaic thermal module to resolve the issue of low outlet temperature in the photovoltaic thermal module and lack of electrical power in solar collectors. To examine the feasibility of this...
Experimental investigations of the performance of a flat-plate solar collector using carbon and metal oxides based nanofluids
, Article Energy ; Volume 227 , 2021 ; 03605442 (ISSN) ; Montazer, E ; Kazi, S. N ; Soudagar, M. E. M ; Ahmed, W ; Zubir, M. N. M ; Afzal, A ; Muhammad, M. R ; Ali, H. M ; Márquez, F. P. G ; Sarsam, W. S ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Covalently functionalized carbon nanoplatelets and non-covalent functionalized metal oxides nanoparticles (surfactant-treated) have been used to synthesize water-based nanofluids in this paper. To prove nanofluid stability, ultraviolet–visible (UV–vis) spectroscopy is used, and the results show that nanofluid is stable for sixty days for carbon and thirty days for metal oxides. The thermophysical properties are evaluated experimentally and validated with theoretical models. Thermal conductivities of f-GNPs, SiO2, and ZnO nanofluids are enhanced by 25.68%, 11.49%, and 15.42%, respectively. Lu-Li and Bruggeman's thermal conductivity models are correctly matched with the experimental data....
Experimental investigations of the performance of a flat-plate solar collector using carbon and metal oxides based nanofluids
, Article Energy ; Volume 227 , 2021 ; 03605442 (ISSN) ; Montazer, E ; Kazi, S. N ; Soudagar, M. E. M ; Ahmed, W ; Zubir, M. N. M ; Afzal, A ; Muhammad, M. R ; Ali, H. M ; Márquez, F. P. G ; Sarsam, W. S ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
Covalently functionalized carbon nanoplatelets and non-covalent functionalized metal oxides nanoparticles (surfactant-treated) have been used to synthesize water-based nanofluids in this paper. To prove nanofluid stability, ultraviolet–visible (UV–vis) spectroscopy is used, and the results show that nanofluid is stable for sixty days for carbon and thirty days for metal oxides. The thermophysical properties are evaluated experimentally and validated with theoretical models. Thermal conductivities of f-GNPs, SiO2, and ZnO nanofluids are enhanced by 25.68%, 11.49%, and 15.42%, respectively. Lu-Li and Bruggeman's thermal conductivity models are correctly matched with the experimental data....