Numerical Study on Thermal Efficiency of Large-Scale Flat-Plate Solar Collectors

2020 ◽  
pp. 917-927
Author(s):  
Dengjia Wang ◽  
Yuchao Ren ◽  
Yingya Chen ◽  
Yanfeng Liu
Keyword(s):  
Flat Plate ◽  
Thermal Efficiency ◽  
Large Scale ◽  
Numerical Study ◽  
Solar Collectors

scholarly journals An experimental study of the thermal performance of the square and rhombic solar collectors

2018 ◽  
Vol 22 (1 Part B) ◽  
pp. 487-494 ◽  
Author(s):  
Aminreza Noghrehabadi ◽  
Ebrahim Hajidavaloo ◽  
Mojtaba Moravej ◽  
Ali Esmailinasab
Keyword(s):  
Experimental Study ◽  
Flat Plate ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Performance ◽  
Thermal Efficiency ◽  
Solar Collectors ◽  
Heating Systems ◽  
Solar Water Heating

Solar collectors are the key part of solar water heating systems. The most widely produced solar collectors are flat plate solar collectors. In the present study, two types of flat plate collectors, namely square and rhombic collectors are experi?mentally tested and compared and the thermal performance of both collectors is investigated. The results show both collectors have the same performance around noon (?61%), but the rhombic collector has better performance in the morning and afternoon. The values for rhombic and square collectors are approximately 56.2% and 53.5% in the morning and 56.1% and 54% in the afternoon, respectively. The effect of flow rate is also studied. The thermal efficiency of rhombic and square flat plate collectors increases in proportion to the flow rate. The results indicated the rhombic collector had better performance in comparison with the square collector with respect to the mass-flow rate.

scholarly journals Improving the Thermal Efficiency of Flat Plate Solar Collector Using Nano-Fluids as a Working Fluids: A Review

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Saif Ali Kadhim ◽  
Osama Abd AL-Munaf Ibrahim
Keyword(s):  
Flat Plate ◽  
Thermal Efficiency ◽  
Solar Collector ◽  
Base Fluid ◽  
Working Fluid ◽  
Solar Collectors ◽  
Nano Fluid ◽  
Flat Plate Solar Collector ◽  
Nano Fluids ◽  
Better Than

Solar energy is one of the most important types of renewable energy and is characterized by its availability, especially in Iraq. It can be used in many applications, including supply thermal energy by solar collectors. Improving the thermal efficiency of solar collector leads to an increase in the thermal energy supplied. Using a nano-fluid instead of base fluid (water is often used) as a working fluid is a method many used to increase the thermal efficiency of solar collectors. In this article, the latest research that used nano-fluid as a working fluid in evaluating the thermal efficiency of solar collector, type flat plate was reviewed. The thermal efficiency improvement of flat plate solar collector was reviewed based on the type of nanoparticles (metal oxides, semiconductors oxides, carbon compounds) used in the base fluid and comparison was made between these nanoparticles under the same conditions. Moreover, the effect of varying the concentration of nanoparticles in the base fluid and changing the working fluid flow rate on the thermal efficiency of flat plate solar collector was also reviewed. The results of the review showed that nano-fluids containing carbon compounds are better than other nano-fluids and that copper oxide is better than the rest of the metal oxides used in improving the thermal efficiency of flat plate solar collectors.

A Review on the Use of Hybrid Nanofluid in a Solar Flat Plate and Parabolic Trough Collectors and Its Enhanced Collector Thermal Efficiency

2021 ◽  
Vol 10 (2) ◽  
pp. 147-171
Author(s):  
L. Syam Sundar ◽  
Solomon Mesfin ◽  
Yihun Tefera Sintie ◽  
V. Punnaiah ◽  
Ali J. Chamkha ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Flat Plate ◽  
Thermal Efficiency ◽  
Energy Demand ◽  
Fossil Fuel ◽  
Working Fluid ◽  
Solar Collectors ◽  
The World ◽  
Hybrid Nanofluids ◽  
Flat Plate Collector

Energy demand is high in all parts of the world, mostly in all industrial sectors. To meet the energy demand the fossil fuel is the only way. Due to rapid industrial growth and use of fossil fuel result in global warming and environmental pollution. Moreover, the limited availability of the fossil fuels, it is necessary to depend on the renewable energy sources. Promising renewable energy in the world is solar energy, which is available largely on the earth surface. The solar energy can be converted into thermal energy in the solar flat plate collector. The collector thermal efficiency is purely depends on the working fluid used in it. Most of the studies revealed that replacing the working fluid with high thermal conductivity fluids called as nanofluids and hybrid nanofluids can improve the collector thermal efficiency. Few decades back studies have been conducted with nanofluids in solar collectors. Currently the researchers are working on solar collectors for further improvement of its efficiency using hybrid nanofluids. In this review paper, we will discuss about the synthesis of hybrid nanoparticles, hybrid nanofluids, characterization, thermophysical properties, and application of hybrid nanofluids in solar flat plate collector under natural and forced circulation of fluid. The research gap in the solar collector is also discussed in this article. This paper also explains about the heat transfer capabilities of hybrid nanofluids especially used solar collectors.

Thermal Performance analysis of Large-scale Flat Plate Solar Collectors and Regional Applicability in China

Energy ◽  
2021 ◽  
pp. 121931
Author(s):  
Dengjia Wang ◽  
Zhelong Mo ◽  
Yanfeng Liu ◽  
Yuchao Ren ◽  
Jianhua Fan
Keyword(s):  
Performance Analysis ◽  
Flat Plate ◽  
Thermal Performance ◽  
Large Scale ◽  
Solar Collectors

scholarly journals Numerical study of natural convection in an inclined enclosure: application to flat plate solar collectors

2017 ◽  
Vol 4 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Charaf-Eddine Bensaci ◽  
Adnane Labed ◽  
Miloud Zellouf ◽  
Abdelhafid Moummi
Keyword(s):  
Natural Convection ◽  
Flat Plate ◽  
Numerical Study ◽  
Solar Collectors ◽  
Inclined Enclosure

INFLUENCE OF FLOW RATE AND TEMPERATURES ON THE THERMAL EFFICIENCY OF FLAT PLATE SOLAR COLLECTORS

2016 ◽  
Author(s):  
Janaína de Oliveira Castro Silva ◽  
Cristiana Maia ◽  
Janaína de Oliveira Castro Silva ◽  
Antonia Sonia Cardoso Diniz ◽  
André Ferreira
Keyword(s):  
Flat Plate ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Solar Collectors

scholarly journals On the Correlation between the Geometrical Features and Thermal Efficiency of Flat-Plate Solar Collectors

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 261
Author(s):  
Waldemar Kuczynski ◽  
Kazimierz Kaminski ◽  
Pawel Znaczko ◽  
Norbert Chamier-Gliszczynski ◽  
Piotr Piatkowski
Keyword(s):  
Flat Plate ◽  
Thermal Efficiency ◽  
Experimental Studies ◽  
Solar Collectors ◽  
Performance Properties ◽  
Geometrical Features ◽  
And Performance

This article presents the results of numerical and experimental studies on the impacts of the selected geometrical features of liquid solar collectors on their thermal efficiency. The experiments were carried out while meeting the requirements of the ISO 9806:2017 standard. Selected changes in the geometrical features were analysed by using fully functional prototypes of modified solar collectors. The correlations between the design and performance properties of the solar collectors were determined in accordance with the changes in the shape of the thermal efficiency η(T*m) curve.

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