Experimental and numerical analysis of an efficiently optimized evacuated flat plate solar collector under medium temperature

Gao, Datong; Gao, Guangtao; Cao, Jingyu; Zhong, Shuangling; Ren, Xiao; Dabwan, Yousef N.; Hu, Mao-Bin; Jiao, Dongsheng; Kwan, Trevor Hocksun; Pei, Gang

doi:10.1016/j.apenergy.2020.115129

Cited by 67 publications

(17 citation statements)

References 32 publications

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“…If A = F R (τα) e , B = F R U L , T m * = (T f − T a )/I, then η = A − BT m * [48]. For a given solar collector, A is the intercept efficiency, a constant that mainly depends on the optical characteristics of the transparent cover and the absorber.…”

Section: Collection Efficiencymentioning

confidence: 99%

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Ding

Liu

2021

Energies

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The vanadium-titanium black ceramic (VTBC) coating on all-ceramic solar collectors has both high absorptance (0.94) and high emissivity (90%). However, the thermal conductivity of ceramic is very low (1.256 W/mK). To improve the heat collection efficiency of VTBC solar collectors, this paper establishes a mathematical model based on the energy-conservation relationships under steady-state conditions and creates a corresponding computer program. Key parameters for VTBC solar collectors include the heat-removal factor, effective transmittance-absorptance product for the absorber, total heat loss coefficient, etc. Then, via experimental testing, this study proposes a reference model for domestic VTBC solar collectors in a cold location (η = 0.89 − 2.20Tm*). Last, this work analyzes the influences of fin design and transparent cover design on VTBC solar collectors individually, using the created computer program. Results show that the most effective optimization method is to increase the transmittance of the transparent cover. By increasing the transmittance from 0.93 to 0.96, this study creates an optimized VTBC solar collector theoretical model (η = 0.92 − 2.20Tm*).

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Section: Collection Efficiencymentioning

confidence: 99%

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Ding

Liu

2021

Energies

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“…The inner vacuum enables achieving a higher thermal efficiency since the conduction and convection losses are eliminated; in addition, this effect causes that the collector occupies less surface than the ETC. Medium temperatures between 120 and 180 °C may be reached with this technology, to fulfill requirements of industrial heat [25].…”

Section: Evacuated Flat Plate Collectormentioning

confidence: 99%

Untitled

2021

ings

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“…Figura 5. Estructura del colector de placa plana evacuado [25] El vacío interior permite alcanzar una mayor eficiencia térmica debido a que se eliminan las pérdidas por conducción y convección; además, este efecto, hace que el colector ocupe menos superficie que el colector ETC. Con esta tecnología se puede alcanzar temperaturas medias entre 120 y 180 °C para satisfacer demandas de calor industrial [25].…”

Section: Colector De Placa Plana Evacuadounclassified

Distanciamiento social ante la COVID-19: Simulación del aforo máximo de personas mediante PHP

Carrión-Chamba

Murillo-Torres

Montero-Izquierdo

2021

ings

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El consumo energético asociado al sector de la industria representa el 38 % de la demanda de energía a nivel global, siendo un aspecto importante que marca el desarrollo de un país. En este sentido, es sumamente importante diversificar las distintas fuentes de energía e incorporar el uso de fuentes renovables de energía, como la solar, no solamente con la idea de asegurar el suministro energético, sino también considerando como elementos que permitan la reducción de las emisiones generadas por el uso de combustibles fósiles. El presente trabajo aborda las principales tecnologías de colectores solares que pueden ser incorporadas a distintos tipos de industrias, basado en experiencias e investigaciones en otros países. Sobre la base de esta revisión, se ha visto que una buena parte de las industrias a nivel mundial requieren temperaturas en sus procesos hasta los 250 °C, lo que hace idóneo el uso de esta tecnología. En función de cada industria, se podrán usar colectores solares de placa plana, de tubos de vacío, del tipo Fresnel o cilindro parabólicos. Por último, se detallan los ahorros asociados a algunas instalaciones y se abordan los desafíos relacionados con este sector.

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Experimental and numerical analysis of an efficiently optimized evacuated flat plate solar collector under medium temperature

Cited by 67 publications

References 32 publications

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

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Distanciamiento social ante la COVID-19: Simulación del aforo máximo de personas mediante PHP

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