Study of the melting performance of shell-and-tube latent heat thermal energy storage unit under the action of rotating finned tube

Zheng, Zhang‐Jing; Sun, Yu; Chen, Yang; He, Chen; Yin, Hang; Yang, Xu

doi:10.1016/j.est.2023.106801

Cited by 18 publications

(3 citation statements)

References 27 publications

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“…The effect of full-scale fins with constant rotation should be further investigated. Zheng et al [34] numerically analyzed the melting of paraffin PCM in a rotating horizontal shell-and-tube LHTES system. A static case was compared to rotational cases of 1, 2, 4, 8, and 16 rpm.…”

Section: System Rotationmentioning

confidence: 99%

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Shank

Tiari

2023

Energies

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Renewable energy resources require energy storage techniques to curb problems with intermittency. One potential solution is the use of phase change materials (PCMs) in latent heat thermal energy storage (LHTES) systems. Despite the high energy storage density of PCMs, their thermal response rate is restricted by low thermal conductivity. The topic of heat transfer enhancement techniques for increasing thermal performance of LHTES systems has mainly focused on passive heat transfer enhancement techniques with less attention towards active methods. Active heat transfer enhancement techniques require external power supplied to the system. In this paper, recent advances in active heat transfer enhancement techniques within LHTES systems are reviewed, including mechanical aids, vibration, jet impingement, injection, and external fields. The pertinent findings related to the field are summarized in relation to the charging and discharging processes of PCMs. Suggestions for future research are proposed, and the importance of additional energy input for storage is discussed.

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Section: System Rotationmentioning

confidence: 99%

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Shank

Tiari

2023

Energies

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“…Qu et al [31] reported the melting and solidification heat transfer coefficients of PCM capsules by the oscillating movement were improved by 50% and 94%, respectively. Zheng et al [32] concluded that a rotating finned tube can enhance the convection of liquid PCM and reduce the melting time by 30.3% compared to a static finned tube. Huang et al [33] concluded that the combination rotation conditions moderately reduced the adverse effects caused by metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Melting and Solidification Characteristics of PCM in Oscillated Bundled-Tube Thermal Energy Storage System

Liu,

Xiao,

Chen

et al. 2024

Energies

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Phase change material (PCM) based thermal energy storage (TES) is an important solution to the waste of heat and intermittency of new energy sources. However, the thermal conductivity of most PCMs is low, which severely affects the thermal energy storage performance. Oscillation of the tube bundles in a TES unit can intensify the convection of liquid PCM and, therefore, enhance heat transfer. However, the energy storage performance of bundled-tube TES systems in response to oscillation at different amplitudes and frequencies has not been well understood yet, and the optimum time to apply the oscillation during phase transition remains unexplored. To address this issue, this present study was carried out. First, the melting behaviour of PCM with oscillation starting at different times was investigated. Then, the influences of oscillation frequency and amplitude on the melting performance were explored. Finally, the solidification behaviour of PCM with oscillation starting at different times was examined. Results show that the oscillation can accelerate the phase transition process by enhancing convective heat transfer. Compared to the case without oscillation, the complete melting and solidification times are reduced by 8.2 and 6.7% for the case with oscillation starting at 200 s, respectively. The effect of oscillation frequency on the melting enhancement is negligible, while the oscillation amplitude has an important effect on the melting enhancement.

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“…Compared with the device with a single phase change heat storage, with a phase change temperature of 286.15 K, the exergy efficiency and cold storage rate were increased by 1.2% and 1.7%, respectively. Zheng et al [23] used a shell and tube latent heat storage unit to study the performance enhancement of the melting characteristics, and the effects of the rates of the porosity and ratio of PCMs of the first stage to those of the second stage on the melting rate were investigated. Ahmed et al [24] introduced a new type of combined sensible-latent heat energy storage structure into a tank-type thermocline thermal energy storage (TES), and three types of PCMs were stacked along the height side according to different volume fractions; the results indicated that the arrangements of TES with volume fraction arrangements of 40% for PCM1, 20% for PCM2 and 40% for PCM3 had the best performances.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Exergy Analysis of Dehumidification Performances for a Cascaded Phase Change Heat Storage Dehumidifier

et al. 2022

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In the humidification and dehumidification solar desalination system, the recovery of vapor condensation latent heat is the key problem. Using a cascaded phase change heat storage method to recover vapor condensation latent heat can improve the phase change heat storage rate and the water production performance of dehumidifier. The exergy analysis and experimental methods are used to study the cascaded phase change storage dehumidifier. The results show that the more stages of phase change materials in the cascaded phase change heat storage device, the greater the exergy efficiency will be. The heat transfer performance of phase change materials increases with the increase of hot and wet air temperature and flow at the inlet of the dehumidifier. The exergy efficiency and gain output ratio of three-stage phase change heat storage are higher than that of the single-stage. The three-stage one is recommended. If the heat recovered by the cascaded phase change heat storage device is supplied to the passive humidification dehumidification desalinator for secondary water output, the water output and gain output ratio will increase by 25% and the water production cost will be reduced by 20%. The results can provide a basis for the design and application of a cascaded phase change heat storage dehumidifier.

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Study of the melting performance of shell-and-tube latent heat thermal energy storage unit under the action of rotating finned tube

Cited by 18 publications

References 27 publications

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Melting and Solidification Characteristics of PCM in Oscillated Bundled-Tube Thermal Energy Storage System

Experimental Investigation and Exergy Analysis of Dehumidification Performances for a Cascaded Phase Change Heat Storage Dehumidifier

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