An overview on current application of nanofluids in solar thermal collector and its challenges

Leong, Kin Yuen; Ong, Hwai Chyuan; Amer, Noor Hafizah; Norazrina, Mat Jali; Risby, M. S.; Ahmad, Ku Zarina Ku

doi:10.1016/j.rser.2015.09.060

Cited by 142 publications

(44 citation statements)

References 72 publications

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“…[28][29][30][31] As shown in Table 6, the heat transfer enhancement method used in PCMs is used mainly to reduce the thermal resistance of PCMs by adding high thermal conductivity materials to the PCM, such as expandable graphite, 72,93,94 nano-scale metal, 75 and metal oxide. [28][29][30][31] As shown in Table 6, the heat transfer enhancement method used in PCMs is used mainly to reduce the thermal resistance of PCMs by adding high thermal conductivity materials to the PCM, such as expandable graphite, 72,93,94 nano-scale metal, 75 and metal oxide.…”

Section: Selection Of Pcm Strengthening Methodsmentioning

confidence: 99%

Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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Solar air conditioning is an important approach to satisfy the high demand for cooling given the global energy situation. The application of phase-change materials (PCMs) in a thermal storage system is a way to address temporary power problems of solar air-conditioning systems. This paper reviews the selection, strengthening, and application of PCMs and containers in latent thermal storage system for solar air-conditioning systems. The optimization of PCM container geometry is summarized and analyzed. The hybrid enhancement methods for PCMs and containers and the cost assessment of latent thermal storage system are discussed. The more effective heat transfer enhancement using PCMs was found to mainly involve micro-nano additives. Combinations of fins and nanoadditives, nanoparticles, and metal foam are the main hybrid strengthening method. However, the thermal storage effect of hybrid strengthening is not necessarily better than single strengthening. At the same time, the latent thermal storage unit has less application in the field of solar airconditioning systems, especially regarding heat recovery, because of its cost and thermal storage time. The integration of latent thermal storage units and solar air-conditioning components, economic analysis of improvement technology, and quantitative studies on hybrid improvement are potential research directions in the future.

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Section: Selection Of Pcm Strengthening Methodsmentioning

confidence: 99%

Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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“…Many studies have been conducted on flat‐plate solar collectors . Several methods have been proposed in order to improve their efficiency and output temperature . Nanofluid, containing suspended nanoparticles (NPs) in a base fluid, applied in the solar collector and increase their performance due to higher thermal conductivity compared with pure fluids.…”

Section: Nanotechnology Application In Solar Energymentioning

confidence: 99%

“…[33][34][35] Several methods have been proposed in order to improve their efficiency and output temperature. 36,37 Nanofluid, containing suspended nanoparticles (NPs) in a base fluid, 38 applied in the solar collector and increase their performance due to higher thermal conductivity compared with pure fluids. Nanofluids are applied in solar collector and solar water heating systems in order to improve their efficiency.…”

Section: Solar Collectormentioning

confidence: 99%

Renewable energy harvesting with the application of nanotechnology: A review

et al. 2018

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Summary It is believed that fossil fuel sources are exhaustible and also the major cause of greenhouse gas emission. Therefore, it is required to increase the portion of renewable energy sources in supplying the primary energy of the world. In this study, it is focused on application of nanotechnology in exploitation of renewable energy sources and the related technologies such as hydrogen production, solar cell, geothermal, and biofuel. Here, nanotechnologies influence on providing an alternative energy sources, which are environmentally benign, are comprehensively discussed and reviewed. Based on the literature, employing nanotechnology enhances the heat transfer rate in photovoltaic/thermal (PV/T) systems and modifies PV structures, which can improve its performance, making fuel cells much cost‐effective and improving the performance of biofuel industry through utilization of nanocatalysts, manufacturing materials with high durability and lower weight for wind energy industry.

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“…Similar studies in this field were conducted by other researchers. [16][17][18][19] In particular, Kasaeian et al, 20 Kim et al, 21 Leong et al, 22 Mahian et al, 23 and Sarsam et al 24 presented results of very extensive work on the use of nanofluids in solar energy systems. Other potential applications for nanofluids include friction reduction, [25][26][27] magnetic sealing, [28][29][30][31] biomedical applications, 32,33 electronic cooling, [34][35][36] and many others.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties of Boron Nitride-Ethylene Glycol (BN-EG) Nanofluids

Fal

Cholewa

Gizowska

et al. 2016

Journal of Elec Materi

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This paper presents the results of experimental investigation of the dielectric properties of ethylene glycol (EG) with various load of boron nitride (BN) nanoparticles. The nanofuids were prepared by using a two-step method on the basis of commercially available BN nanoparticles. The measurements were carried out using the Concept 80 System (NOVOCONTROL Technologies GmbH & Co. KG, Montabaur, Germany) in a frequency range from 10 Hz to 10 MHz and temperatures from 278.15 K to 328.15 K. The frequency-dependent real (e 0 ) and imaginary (e 00 ) parts of the complex permittivity (e Ã ) and the alternating current (AC) conductivity are presented. Also, the effect of temperature and mass concentrations on the dielectric properties of BN-EG nanofluids are demonstrated. The results show that the most significant increase can be achieved for 20 wt.% of BN nanoparticles at 283.15 K and 288.15 K, that is eleven times larger than in the case of pure EG.

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An overview on current application of nanofluids in solar thermal collector and its challenges

Cited by 142 publications

References 72 publications

Review of latent thermal energy storage systems for solar air‐conditioning systems

Review of latent thermal energy storage systems for solar air‐conditioning systems

Renewable energy harvesting with the application of nanotechnology: A review

Dielectric Properties of Boron Nitride-Ethylene Glycol (BN-EG) Nanofluids

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