On the integration of phase change materials with evacuated tube solar thermal collectors

Aramesh, Mohamad; Shabani, Bahman

doi:10.1016/j.rser.2020.110135

Cited by 52 publications

(9 citation statements)

References 122 publications

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“…Photothermal conversion and energy storage using phase change materials are now applied in many processes and technologies. Some studies describe the use of PCM in solar systems, for example, as tank filling in a part of the coupled PCM-solar thermal collector system [7][8][9], the filling of evacuated tube solar collectors [10,11], or the fabrication and combination of composite phase change material wallboard [12] with the solar thermal system. PCM is also used in a solar distillation system [13], or in the production of sustainable water from novel-designed tubular solar still [14].…”

Section: The Current State Of Knowledgementioning

confidence: 99%

Experimental Studies of the Effect of Microencapsulated PCM Slurry on the Efficiency of a Liquid Solar Collector

2022

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A phase change material (PCM) is used as a substance filling in a heat store, due to the possibility of accumulating a significant amount of latent heat—the heat of phase transformation. Knowledge about the practical use of the working fluid, with the addition of a phase change substance, in heat exchange systems is limited The paper presents the results of preliminary research aimed at determining the possibility of using microencapsulated phase change material slurry (mPCM) as a working fluid in installations with a flat liquid solar collector, and the potential benefits as a result. The following were used as the working fluid during the tests: water (reference liquid), and a slurry of microencapsulated PCM. The mass fraction of mPCM in the working liquids is 4.3% and 8.6%, respectively. The research was carried out in laboratory conditions, in the range of radiation intensity G = 270–880 W/m2. The mass flux of each of the three working fluids in the collector is 30 kg/h, 40, kg/h, 60 kg/h, and 80 kg/h. Two main advantages of using mPCM as an additive to the working liquid are found: 1. in the entire range of thermal radiation intensity, the increase in the thermal efficiency of the collector fed with slurries is 4% with 4.3% mPCM in the slurry, and 6% with 8.6% mPCM in the slurry (for = 80 kg/h); 2. the slurry is characterized by a lower temperature at the outlet from the collector as compared to the water with the same thermal and flow parameters, which reduces heat losses to the environment both from the collector and other elements of the installation, as a result of excessive heating of the working liquid.

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Section: The Current State Of Knowledgementioning

confidence: 99%

Experimental Studies of the Effect of Microencapsulated PCM Slurry on the Efficiency of a Liquid Solar Collector

2022

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“…The operation temperature of an ETC may reach values up to 120 °C [20]. In addition, the high thermal efficiency and the relatively low cost of this collector are the main reasons of its high competitiveness in the market [21]. There are two main types of ETCs:…”

Section: Vacuum Tube Collectormentioning

confidence: 99%

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2021

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“…La temperatura de operación del colector ETC puede alcanzar valores de hasta 120 °C [19]. Además, la alta eficiencia térmica y los costos relativamente bajos de este colector son las razones principales de su alta competencia en el mercado [20]. Existen dos tipos principales de colectores ETC: Figura 1.…”

Section: Colector De Tubos De Vacíounclassified

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

Carrión-Chamba

Murillo-Torres

Montero-Izquierdo

2021

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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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On the integration of phase change materials with evacuated tube solar thermal collectors

Cited by 52 publications

References 122 publications

Experimental Studies of the Effect of Microencapsulated PCM Slurry on the Efficiency of a Liquid Solar Collector

Experimental Studies of the Effect of Microencapsulated PCM Slurry on the Efficiency of a Liquid Solar Collector

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

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