Experimental study of a pilot-scale fin-and-tube phase change material storage

Besagni, Giorgio; Croci, Lorenzo

doi:10.1016/j.applthermaleng.2019.114089

Cited by 17 publications

(8 citation statements)

References 29 publications

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“…Construction of some heat exchangers is specific, and therefore it is difficult to assign them to the categories described in Sections 3.1-3.7. These other heat exchangers can be made of a cylindrical [34,[148][149][150][151][152][153] or rectangular cuboid enclosure [25,62,[154][155][156][157] filled with PCM. Heat is transferred between PCM and HTF through pipes, however, in contrast to the MTHXs, the HTF flows successively through each subsequent pipe, as shown in Figure 16.…”

Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

“…Kurnia et al [46] found that when the number of tubes increased from 2 to 4, the solidification time of the PCM decreased by 50%. The main disadvantage of increasing the number of tubes is a large reduction of the HTF temperature along the flow path, which results in the non-uniform phase change process [154]. Therefore, Besagni and Croci [154] proposed to change the flow path of the HTF from the series configuration to the parallel configuration.…”

Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

“…The main disadvantage of increasing the number of tubes is a large reduction of the HTF temperature along the flow path, which results in the non-uniform phase change process [154]. Therefore, Besagni and Croci [154] proposed to change the flow path of the HTF from the series configuration to the parallel configuration. In the series configuration, all HTF tubes were connected and increasingly colder HTF flowed into each subsequent tube.…”

Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

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The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

et al. 2020

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An application of latent heat thermal energy storage systems with phase change materials seems to be unavoidable in the present world. The latent heat thermal energy storage systems allow for storing excessive heat during low demand and then releasing it during peak demand. However, a phase change material is only one of the components of a latent heat thermal energy storage system. The second part of the latent heat thermal energy storage is a heat exchanger that allows heat transfer between a heat transfer fluid and a phase change material. Thus, the main aim of this review paper is to present and systematize knowledge about the heat exchangers used in the latent heat thermal energy storage systems. Furthermore, the operating parameters influencing the phase change time of phase change materials in the heat exchangers, and the possibilities of accelerating the phase change are discussed. Based on the literature reviewed, it is found that the phase change time of phase change materials in the heat exchangers can be reduced by changing the geometrical parameters of heat exchangers or by using fins, metal foams, heat pipes, and multiple phase change materials. To decrease the phase change material’s phase change time in the tubular heat exchangers it is recommended to increase the number of tubes keeping the phase change material’s mass constant. In the case of tanks filled with spherical phase change material’s capsules, the capsules’ diameter should be reduced to shorten the phase change time. However, it is found that some changes in the constructions of heat exchangers reduce the melting time of the phase change materials, but they increase the solidification time.

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Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

Section: Other Types Of Heat Exchangersmentioning

confidence: 99%

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The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

et al. 2020

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“…However, different strategies and techniques that can be used to improve thermal conductivity were investigated in the literature. The main solutions that were extensively studied are the increase in the convection coefficient of heat transfer by means of dynamic systems, the addition of particles (such as carbon elements, metallic particles, and nanoparticles), the inclusion of PCM in a metallic matrix, and the increase in the heat transfer area by using fins, and micro and macro-encapsulation [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Two PCM Macro-Encapsulation Designs in a Thermal Energy Storage Tank

et al. 2021

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The use of latent heat thermal energy storage is an effective way to increase the efficiency of energy systems due to its high energy density compared with sensible heat storage systems. The design of the storage material encapsulation is one of the key parameters that critically affect the heat transfer in charging/discharging of the storage system. To fill the gap found in the literature, this paper experimentally investigates the effect of the macro-encapsulation design on the performance of a lab-scale thermal energy storage tank. Two rectangular slabs with the same length and width but different thickness (35 mm and 17 mm) filled with commercial phase change material were used. The results show that using thinner slabs achieved a higher power, leading to a reduction in the charging and discharging time of 14% and 30%, respectively, compared with the thicker slabs. Moreover, the variation of the heat transfer fluid flow rate has a deeper impact on the temperature distribution and the energy charged/released when thicker slabs were used. The macro-encapsulation design did not have a significant impact on the discharging efficiency of the tank, which was around 85% for the operating thresholds considered in this study.

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“…Khan & Z. A. Khan 2017;Kabbara et al, 2016;Besagni & Croci, 2019) have been found to be very useful in terms of heat transfer rate improvement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Open and Closed Operation Modes on the Performance of Phase Change Material Based Copper Heat Exchanger

Pakalka

Valančius

Damonskis³

2020

International Conference “Environmental Engineering”

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Many studies related to latent heat thermal energy storage (LHTES) and performance of phase change materials (PCM) are focused on melting and solidification processes. Investigating and understanding the influence of various parameters on PCMs based thermal energy storage is the key to developing innovative and efficient energy storage systems. The aim of this study is to experimentally compare and assess the performance of phase change material based copper heat exchanger (PCM-HX) in different modes of operation. This PCM-HX is designed to be used in systems where thermal energy can be stored up to 90 °C and an organic PCM RT82 was selected as the energy storage medium. This study focuses on the pressure impact on the PCM melting (charging) and solidification (discharging) processes. Two different modes of operation were analysed: Open and Closed. In the case of an Open mode, the storage tank of PCM-HX was open to the atmosphere (pressure control valve open), in the case of Closed mode the storage tank was closed (pressure control valve closed). PCM charging and discharging processes were conducted and the PCM-HX performances were tested at different pressure inside the storage tank.

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Experimental study of a pilot-scale fin-and-tube phase change material storage

Cited by 17 publications

References 29 publications

The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

Experimental Study on Two PCM Macro-Encapsulation Designs in a Thermal Energy Storage Tank

Effect of Open and Closed Operation Modes on the Performance of Phase Change Material Based Copper Heat Exchanger

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