scholarly journals Single and Hybrid Nanofluids to Enhance Performance of Flat Plate Solar Collectors: Application and Obstacles

2020 ◽  
Vol 65 (1) ◽  
pp. 86-102
Author(s):  
Qudama Al-Yasiri ◽  
Márta Szabó ◽  
Müslüm Arıcı
Keyword(s):  
Flat Plate ◽  
Performance Enhancement ◽  
Research Area ◽  
Concentration Limit ◽  
Solar Collectors ◽  
Thermal Systems ◽  
Solar Systems ◽  
Low Concentrations ◽  
Medium Level ◽  
Influential Parameters

Solar energy represents the best alternative for traditional energy sources used in many thermal energy systems. Among solar thermal systems, Flat Plate Solar Collectors (FPSCs) are the most utilized type implemented in low and medium-level thermal domestic applications. Recently, the usage of nanofluids (NFs) to enhance FPSCs is one of the newest technologies that has drawn the attention of researchers to improve the overall thermal efficiency of solar systems. This paper briefly reviews the recent studies carried on thermal performance enhancement of FPSCs by implementing NFs (single and hybrid NFs) considering the main influential parameters such as particle concentration, particle size, and collector area. Finally, the main obstacles reported by the researchers such as the instability, viscosity, concentration limit, corrosion effect and others are identified, which is believed to be useful for interested newcomers in this research area. Based on the studies investigated in this paper, NFs, even under low concentrations, can remarkably improve the energetic and exergetic efficiency of FPSCs.

scholarly journals State of the Art of Techno-Economics of Nanofluid-Laden Flat-Plate Solar Collectors for Sustainable Accomplishment

2020 ◽  
Vol 12 (21) ◽  
pp. 9119
Author(s):  
Seyed Reza Shamshirgaran ◽  
Hussain H. Al-Kayiem ◽  
Korada V. Sharma ◽  
Mostafa Ghasemi
Keyword(s):  
Flat Plate ◽  
Performance Enhancement ◽  
Metal Oxide Nanoparticles ◽  
Performance Criteria ◽  
Solar Collectors ◽  
Transfer Energy ◽  
Thermal Systems ◽  
Pressure Drops ◽  
Solar Systems ◽  
The Status

Emerging nanotechnology with solar collector technology has attracted the attention of researchers to enhance the performance of solar systems in order to develop efficient solar thermal systems for future sustainability. This paper chronologically reviews the various research works carried out on the performance enhancement of nanofluid-filled flat-plate solar collectors (FPCs). Gaps in the radiation exergy models and maximum exergy of FPCs, the importance of pressure drops in collector manifolds in exergy analysis, and the economics of nanofluid-laden FPCs have been addressed. The necessity of replacing currently used chemically derived glycol products with a renewable-based glycol has not been reported in the current literature thoroughly, but it is pondered in the current paper. Moreover, the thermophysical properties of all common metal and metal oxide nanoparticles utilized in various studies are collected in this paper for the first time and can be referred to quickly as a data source for future studies. The different classical empirical correlations for the estimation of specific heat, density, conductivity, and viscosity of reported nanofluids and base liquids, i.e., water and its mixture with glycols, are also tabulated as a quick reference. Brief insights on different performance criteria and the utilized models of heat transfer, energy efficiency, exergy efficiency, and economic calculation of nanofluid-based FPCs are extracted. Most importantly, a summary of the current progress in the field of nanofluid-charged FPCs is presented appropriately within two tables. The tables contain the status of the main parameters in different research works. Finally, gaps in the literature are addressed and mitigation approaches are suggested for the future sustainability of nanofluid-laden FPCs.

scholarly journals Aplicaciones del Captador Solar de Placa Plana y del Captador de Tubo de Vacío en la Edificación = Applications of the Flat Plate Solar Collectors and the Vacuum Tube Solar Collectors in Building

2018 ◽  
Vol 4 (3) ◽  
pp. 25 ◽  
Author(s):  
Daniel Ferrández ◽  
Carlos Moron ◽  
Jorge Pablo Díaz ◽  
Pablo Saiz
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Energy Demand ◽  
Hot Water ◽  
Solar Thermal ◽  
Solar Collectors ◽  
Thermal Systems ◽  
Vacuum Tube ◽  
Solar Thermal Collectors ◽  
Flat Plate Solar Collector

ResumenEl actual Código Técnico de la Edificación (CTE) pone de manifiesto la necesidad de cubrir parte de la demanda energética requerida para el abastecimiento de agua caliente sanitaria y climatización de piscinas cubiertas mediante sistemas de aprovechamiento de la energía solar térmica. En este artículo se presenta una comparativa entre las dos principales tipologías de captadores solares térmicos que existen en el mercado: el captador de placa plana y el captador de tubo de vacío, atendiendo a criterios de fracción solar, diseño e integración arquitectónica. Todo ello a fin de discernir en qué circunstancias es más favorable el uso de uno u otro sistema, comparando los resultados obtenidos mediante programas de simulación con la toma de medidas in situ.AbstractThe current Technical Building Code (CTE) highlights the need to cover part of the energy demand required for the supply of hot water and heating of indoor swimming pools using solar thermal systems. This article presents a comparison between the two main types of solar thermal collectors that exist in the market: the flat plate solar collector and the vacuum tube solar collector, according to criteria of solar fraction, design and architectural integration. All of this in order to discern in what circumstances the use of one or the other system is more favourable, comparing the results obtained through simulation programs with the taking of measurements in situ.

Economic Optimization of Stationary Nonevacuated CPC Solar Collectors

1987 ◽  
Vol 109 (1) ◽  
pp. 40-45 ◽  
Author(s):  
M. J. Carvalho ◽  
M. Collares-Pereira ◽  
J. M. Gordon
Keyword(s):  
Low Temperature ◽  
Flat Plate ◽  
Operating Temperature ◽  
Solar Collectors ◽  
Economic Optimization ◽  
Promising Alternative ◽  
Energy Delivery ◽  
Low Concentrations ◽  
East West ◽  
Concentration Ratios

Stationary, nonevacuated CPC solar collectors are a promising alternative to corresponding flat plate collectors in that they offer superior yearly energy delivery at comparable cost for low-temperature thermal applications. For realistic cost scenarios, we determine optimal concentrator configurations and concentration ratios, and calculate their sensitivity to variations in relative component costs, climate, orientation and collector operating temperature. For CPC’s that are to have the flexibility of either east-west or north-south orientation, optimized collectors are shown to have low concentrations of around 1.2, achieved by truncation from acceptance half angles of about 45 deg.

Thermal performance enhancement of flat-plate and evacuated tube solar collectors using nanofluid: A review

2016 ◽  
Vol 76 ◽  
pp. 6-15 ◽  
Author(s):  
Mahmud Jamil Muhammad ◽  
Isa Adamu Muhammad ◽  
Nor Azwadi Che Sidik ◽  
Muhammad Noor Afiq Witri Muhammad Yazid
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Performance Enhancement ◽  
Solar Collectors ◽  
Evacuated Tube

Thermal performance enhancement of micro-grooved aluminum flat plate heat pipes applied in solar collectors

2020 ◽  
Vol 146 ◽  
pp. 2234-2242 ◽  
Author(s):  
Gong Chen ◽  
Yong Tang ◽  
Longhua Duan ◽  
Heng Tang ◽  
Guisheng Zhong ◽  
...  
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Performance Enhancement ◽  
Heat Pipes ◽  
Solar Collectors ◽  
Plate Heat

scholarly journals Solar Thermal Systems Performances versus Flat Plate Solar Collectors Connected in Series

Engineering ◽  
2012 ◽  
Vol 04 (12) ◽  
pp. 881-893 ◽  
Author(s):  
Khaled Zelzouli ◽  
Amenallah Guizani ◽  
Ramzi Sebai ◽  
Chakib Kerkeni
Keyword(s):  
Flat Plate ◽  
Solar Thermal ◽  
Solar Collectors ◽  
Thermal Systems ◽  
In Series
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