Investigation of the Dynamic Melting Process in a Thermal Energy Storage Unit Using a Helical Coil Heat Exchanger

Yang, Xun; Xiong, Teng; Dong, Jingliang; Li, Wen Xin; Wang, Yong

doi:10.3390/en10081129

Cited by 29 publications

(7 citation statements)

References 46 publications

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“…The experimental results showed that the heat transfer time was reduced by approximately half when changing the operating mode from case 8 (57 min) to case 5 (27 min). The results of the present work agreed with the results obtained by Le et al [15] and Yang et al [27]. In their papers, they reported that the charging time for the heat transfer fluid was also reduced by half when the inlet temperature of the heat transfer fluid increased from 55 C to 70 C, and the mass flow rate of the fluid remained constant.…”

Section: Temperature Fields Of Water In the Fish Tanksupporting

confidence: 92%

Experimental Validation of a Low-Energy-Consumption Heating Model for Recirculating Aquaponic Systems

Wang

Wan

et al. 2020

Energies

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Electrical energy is the highest energetic cost in recirculation aquaponic systems (RASs), especially for fish-tank water. Therefore, reducing energy consumption is one of the challenges in developing RAS models. In this study, eleven experimental setups, based on numerical models from an earlier investigator, were built to investigate. Among them, three additional cases (cases 9–11) investigated the transient discharging energy efficiency of thermal energy storage (TES). Cases 9–11 considered three temperature levels, namely, 65–75 °C, 71–81 °C, and 81–87 °C, with a mass flow rate of 0.166 kg/s. The results show that when heating 3.4 m3 of fish tank water from 24.5 °C to 28 °C, the average temperature error of the tank water was between 1.2% and 3.4%. The difference in the heat transfer rate was within ±4.2%. The error in the thermal efficiency was below 8.0%. The error range of the total required thermal energy was from 6.4% to 11.5%. Cases 9–11 used 5.6%, 6.4%, and 7.2% of the thermal energy of the TES tank, respectively. The electrical energy consumption was low compared to the thermal energy of the fish tank water received from the TES unit. Therefore, the proposed low-energy-consumption heating method can replace electric heaters.

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Section: Temperature Fields Of Water In the Fish Tanksupporting

confidence: 92%

Experimental Validation of a Low-Energy-Consumption Heating Model for Recirculating Aquaponic Systems

Wang

Wan

et al. 2020

Energies

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“…As already mentioned, the heat transfer rate between the HTF and PCM increased with an increasing temperature difference between them and with an increasing HTF flow rate. However, many scientists, for example Youssef et al [25], Yang et al [32], and Anish et al [33], concluded that changing the HTF inlet temperature impacts more the phase change time than changing the HTF flow rate. Furthermore, Khan and Khan [34], Wu and Fang [35], and Wu et al [36] found that the phase change time reduction gets smaller as the HTF flow rate increases.…”

Section: The Influence Of Htf Inlet Parametersmentioning

confidence: 99%

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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“…It has been extensively reported that nanofluids and working fluid mixed with nanoparticles possess superior thermal conductivity to that of pure fluid [5][6][7][8][9][10][11]. In particular, nanofluids have been applied in energy storage systems to enhance the thermal conductivity of the energy storage materials [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

Zhou

Wang

2019

Energies

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The thermal energy storage properties of a working fluid can be modified by the exothermic and endothermic adsorption and desorption of fluid molecules in the micro/nanoporous materials. In this study, thermogravimetric (TG) analysis experiments and molecular simulations (molecular dynamics, MD, and grand canonical Monte Carlo, GCMC) were employed to examine the thermal energy storage properties of the UIO-66 metal organic framework material, UIO-66/H2O nanofluids and pure water. Our results showed that the molecular simulation calculations were, in principle, consistent with the obtained experimental data. The thermal energy storage performance of UIO-66/H2O nanofluids was enhanced with the increase in the UIO-66 mass fraction. In addition, the differences between the simulation calculations and experimental results could be mainly ascribed to the different structures of UIO-66 and the evaporation of fluid samples. Furthermore, this work indicated that molecular simulations contributed to developing novel working pairs of metal organic heat carriers (MOHCs).

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Investigation of the Dynamic Melting Process in a Thermal Energy Storage Unit Using a Helical Coil Heat Exchanger

Cited by 29 publications

References 46 publications

Experimental Validation of a Low-Energy-Consumption Heating Model for Recirculating Aquaponic Systems

Experimental Validation of a Low-Energy-Consumption Heating Model for Recirculating Aquaponic Systems

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

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

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