Comparative study of the thermal performance of four different shell-and-tube heat exchangers used as latent heat thermal energy storage systems

Gasia, Jaume; Diriken, J.; Bourke, Malcolm; Bael, Johan Van; Cabeza, Luisa F.

doi:10.1016/j.renene.2017.07.114

Cited by 62 publications

(36 citation statements)

References 16 publications

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“…And the compact finned-tube system presented a satisfactory overall performance compared to other published results. Gasia et al [22] compared the performance of TES in four systems including the addition of fins and the use of two different HTF. The results revealed that the finned designs showed an improvement of up to 40% for the same HTF, and water showed results up to 44% higher than silicone for the same design.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations on Charging/Discharging Performance of a Novel Truncated Cone Thermal Energy Storage Tank on a Concentrated Solar Power System

Mao

Liu

2019

International Journal of Photoenergy

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Developing a concentrated solar power (CSP) technology is one of the most effective methods to solve energy shortage and environmental pollution all over the world. Thermal energy storage (TES) system coupling with phase change materials (PCM) is one of the most significant methods to mitigate the intermittence of solar energy. In this paper, firstly, a 2D physical and mathematical model of a novel truncated cone shell-and-tube TES tank has been proposed based on enthalpy method. Secondly, the performance during the charging/discharging process of the truncated cone tank has been compared with the traditional cylindrical tank. Finally, the effects of inlet conditions of heat transfer fluid (HTF), and thickness of tube on the charging/discharging process, stored/released energy capacity; energy storage/release rate and heat storage efficiency have been investigated. The results show that the performance of truncated cone tank is better, and the charging/discharging time reduces 32.08% and 21.59%, respectively, compared with the cylindrical tank. The effect of wall thickness on the truncated cone TES tank can be ignored. And the inlet temperature and velocity of HTF have the significant influence on the charging/discharging performance of TES tank. And the maximum heat storage efficiency of the truncated cone TES tank can reach 93%. However, some appropriate methods should be taken for improving the thermal energy utilization rate of HTF in the future. This research will provide insights and significant reference towards geometric design and operating conditions in TES system.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigations on Charging/Discharging Performance of a Novel Truncated Cone Thermal Energy Storage Tank on a Concentrated Solar Power System

Mao

Liu

2019

International Journal of Photoenergy

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“…Figure shows the charging power and error curve with time of the multichannel flat tube phase change TSU during the charging process (inlet temperature: 65°C, airflow: 100 m 3 /h, initial temperature of the unit: 30°C). Normalized power involves setting the instantaneous peak power of each design to 1 . During the initial stage, the temperature difference between air and lauric acid decreased, and heat storage power decreased with a rapid increase in lauric acid temperature due to sensible heat absorption.…”

Section: Resultsmentioning

confidence: 99%

“…Normalized power involves setting the instantaneous peak power of each design to 1. 23 During the initial stage, the temperature difference between air and lauric acid decreased, and heat storage power decreased with a rapid increase in lauric acid temperature due to sensible heat absorption. Afterward, lauric acid started to absorb latent heat and phase changes, and temperature remained stable for a long time with the stability of heat storage power.…”

Section: Energy Storage and Release During The Charging/dischargingmentioning

confidence: 99%

Experimental and numerical investigations of a lauric acid-multichannel flat tube latent thermal storage unit

et al. 2018

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Summary Phase change heat storage technology has received extensive attention because it can ease the energy utilization problem of uneven energy distribution in time and space. In this study, a multichannel flat tube phase change thermal storage unit that adopts a new multichannel flat tube as the core heat transfer element, air as the heat transfer fluid, and lauric acid as the phase change material is designed and fabricated. Experimental results show the charging/discharging temperature and power variation curve of the device at different air volumes and inlet temperatures. The optimum heat transfer fluid flow was obtained through experiments. Compared with 1D and 2D numerical models proposed by other researchers, we presented and established a 3D numerical model to verify the experimental results. The simulation results exhibit good agreement with the experimental results and show that the natural convection of phase change material in the melting process plays an important role in accelerating melting.

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“…Up to now, numerous experimental studies on the thermal performance of LHTES units have been conducted [8][9][10][11][12][13][14]. However, a limited number of the experimental studies have been reported that focus on building heating applications on a full scale [8].…”

Section: Introductionmentioning

confidence: 99%

“…The experimental rig was also simulated by CFD and the results extracted were used to understand the process duration and the effect of the HTF flow rate along with the heat transfer mechanism acting in both melting and solidification processes considering the requirements for a heating application [15]. Gasia et al [13] experimentally tested and compared in four LHTES systems the addition of fins and the use of two different HTFs based on the shell-and-tube heat exchanger concept, using paraffin RT58 as phase change material. Results indicate that finned designs show an improvement of up to 40%.…”

Section: Introductionmentioning

confidence: 99%

Testing the performance of a prototype thermal energy storage tank working with organic phase change material for space heating application conditions

et al. 2019

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A prototype Latent Heat Thermal Energy Storage (LHTES) unit has been designed, constructed, and experimentally analysed for its thermal storage performance under different operational conditions considering heating application and exploiting solar and geothermal energy. The system consists of a rectangular tank filled with Phase Change Material (PCM) and a finned tube staggered Heat Exchanger (HE) while water is used as Heat Transfer Fluid (HTF). Different HTF inlet temperatures and flow rates were tested to find out their effects on LHTES performance. Thermal quantities such as HTF outlet temperature, heat transfer rate, stored energy, were evaluated as a function of the conditions studied. Two commercial organic PCMs were tested A44 and A46. Results indicate that A44 is more efficient during the charging period, taking into account the two energy sources, solar and heat pump. During the discharging process, it exhibits higher storage capacity than A46. Concluding, the developed methodology can be applied to study different PCMs and building applications.

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Comparative study of the thermal performance of four different shell-and-tube heat exchangers used as latent heat thermal energy storage systems

Cited by 62 publications

References 16 publications

Numerical Investigations on Charging/Discharging Performance of a Novel Truncated Cone Thermal Energy Storage Tank on a Concentrated Solar Power System

Numerical Investigations on Charging/Discharging Performance of a Novel Truncated Cone Thermal Energy Storage Tank on a Concentrated Solar Power System

Experimental and numerical investigations of a lauric acid-multichannel flat tube latent thermal storage unit

Testing the performance of a prototype thermal energy storage tank working with organic phase change material for space heating application conditions

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