Solidification enhancement of PCM in a triplex-tube thermal energy storage system with nanoparticles and fins

Mahdi, Jasim M.; Nsofor, Emmanuel C.

doi:10.1016/j.apenergy.2017.11.082

Cited by 250 publications

(68 citation statements)

References 45 publications

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“…184,185 This is probably because the technology needed to configure fins is simple and easy to implement. The use of fins in thermal storage device design is very common.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

“…A series of studies 173,185,225 have been conducted to investigate the effect of adding different concentrations of Al 2 O 3 nanoparticles and changing the size and quantity of fins. In the field of LTESSs of SACSs, this type of hybrid strengthening studies mainly uses the method of adding nanoparticles to PCM and changing the geometric parameters of fins in the container.…”

Section: Hybrid Strengthening Of Pcm and Its Containermentioning

confidence: 99%

“…The use of fins in thermal storage device design is very common. 184,185 This is probably because the technology needed to configure fins is simple and easy to implement. Common types of fins are longitudinal/rectangular, 186 circular/annular, 187 and plate fins.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

“…In the field of LTESSs of SACSs, this type of hybrid strengthening studies mainly uses the method of adding nanoparticles to PCM and changing the geometric parameters of fins in the container. A series of studies 173,185,225 have been conducted to investigate the effect of adding different concentrations of Al 2 O 3 nanoparticles and changing the size and quantity of fins. According to the analysis of melting process of PCM R82 in a triplex-tube heat exchanger, the melting time of fin group, nanoparticle group, and fin + nanoparticle group saved 59%, 17%, and 44% at the most compared with the nonenhanced group.…”

Section: Hybrid Strengthening Of Pcm and Its Containermentioning

confidence: 99%

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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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“…184,185 This is probably because the technology needed to configure fins is simple and easy to implement. The use of fins in thermal storage device design is very common.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

Section: Hybrid Strengthening Of Pcm and Its Containermentioning

confidence: 99%

Section: Adding Fins On the Container Sidementioning

confidence: 99%

Section: Hybrid Strengthening Of Pcm and Its Containermentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2019

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“…Presently, the most widely used heat storage systems for solar thermal energy are hot water tanks, which process an energy storage density of 69.4 kW·h·m −3 (∆T = 60 K) but a finite storage time [73]. Salt hydrates with melting temperature of 50~60 • C can be incorporated into hot water tanks of solar domestic to reinforce stratification.…”

Section: Salt Hydrates For Hot Water Tanksmentioning

confidence: 99%

Inorganic Salt Hydrate for Thermal Energy Storage

et al. 2017

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Using phase change materials (PCMs) for thermal energy storage has always been a hot topic within the research community due to their excellent performance on energy conservation such as energy efficiency in buildings, solar domestic hot water systems, textile industry, biomedical and food agroindustry. Several literatures have reported phase change materials concerning various aspects. Among these materials, salt hydrates are worthy of exploring due to their high-energy storage density, rational price, multiple sources and relatively good thermal conductivity. This paper reviews the present state of salt hydrates PCMs targeting classification, properties, defects, possible solutions as well as their idiographic features which are suitable for applications. In addition, new trends of future research are also indicated.

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Design of Radially Variant Phase‐Change Material Composites

et al. 2022

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Phase‐change materials (PCMs) and high‐conductivity elements can be combined to form highly compact and efficient composite heat sinks. However, the design challenge presented by thermal composites composed of PCMs and high‐conductivity elements remains unresolved. Herein, design guidelines are presented for radially varying cylindrical PCM composites. Numerical and analytical techniques are utilized to explore the utility and limits of optimal composite designs selecting for 1) temperature minimization, 2) specific effective heat capacity maximization, and 3) volumetric effective heat capacity maximization. Significant increases in each metric are observed when implementing radially variant designs in cylindrical geometries, especially for metrics of heat capacity. Furthermore, a hybrid approach to variant composite design is presented, allowing for the balancing of different design objectives. The utilization of a variable design under high heat flux (10 ± 1.4 W cm−2) and short melting periods (up to 50 s) is experimentally demonstrated, directly resulted in a 65% decrease in total system mass and a 200% increase in specific heat capacity while maintaining strong temperature dampening performance. In a second case study, a 23% decrease in mass is demonstrated while maintaining strong specific heat performance, emphasizing the broad utility of this approach.

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Solidification enhancement of PCM in a triplex-tube thermal energy storage system with nanoparticles and fins

Cited by 250 publications

References 45 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

Inorganic Salt Hydrate for Thermal Energy Storage

Design of Radially Variant Phase‐Change Material Composites

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