Numerical simulation of a latent heat thermal energy storage system with enhanced heat conduction

Costa, M.; Buddhi, D.; Oliva, A.

doi:10.1016/s0196-8904(96)00193-8

Cited by 179 publications

(73 citation statements)

References 12 publications

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“…One of the most efficient and reliable ways to reduce energy consumption is the use of PCMs in latent heat thermal energy storage (LHTES) system to store and release thermal energy. Several works have been done recently considering different types of PCMs and different heat exchanger geometries ( [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]). The shell and finned tubes [6] and [7] is the only one tested on a prototype scale.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Cylindrical Thermal Energy Storage System using Bio-Based Phase Change Materials

Alomair¹,

Alomair²,

Abdullah³

et al. 2017

International Conference of Energy Harvesting, Storage, and Transfer

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-Thermal energy storage (TES) using phase change materials (PCMs) are an efficient and reliable technique to reduce consumption of energy. The heat transfer processes during phase change in PCMs is complex because of the simultaneous presence of solid and liquid phases where, solid and liquid fractions are continuously changing with time. The present experimental investigation focuses on the transient behaviour of the melting process and the dynamic of the solid-liquid interface in a cylindrical TES containing bio-based PCM. Coconut oil is used as a bio-based PCM and two different experimental conditions are investigated. The aim of this study is to improve the understanding of the fundamental of solid-liquid phase transition during melting, and a better characterization of the related heat transfer during phase change processes of bio-based PCM. To achieve these goals, an experimental setup is developed for the visualization of charging time, melt fraction location, and thermal field measurements.

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Section: Introductionmentioning

confidence: 99%

“…The PCM fills the annular space and the heat transfer fluid circulates inside the inner tubes. Several authors further explored the heat transfer characteristics in annular tube heat exchangers experimentally [8,11,12] and numerically [13,14]. They found that especially during the charging period, natural convection plays a major role.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Cylindrical Thermal Energy Storage System using Bio-Based Phase Change Materials

Alomair¹,

Alomair²,

Abdullah³

et al. 2017

International Conference of Energy Harvesting, Storage, and Transfer

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“…Khalifa et al (1987) conducted numerical simulation to examine thermal performance of solar cooker where the solar energy is collected by spiral concentrator. Moreover, Costa et al (1998) studied thermal performance of energy storage system with and without fins. They concluded that the magnitude of melt fraction with fins is more suitable than the system without fins.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Various Phase Change Materials for Thermal Energy Storage of A Solar Cooker via Numerical Simulation

Tarwidi

Murdiansyah

Ginanjar

2016

Int. J. Renew. Energy Dev.

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ABSTRACT. In this paper, thermal performance of various phase change materials (PCMs) used as thermal energy storage in a solar cooker has been investigated numerically. Heat conduction equations in cylindrical domain are used to model heat transfer of the PCMs. Mathematical model of phase change problem in the PCM storage encompasses heat conduction equations in solid and liquid region separated by moving solid-liquid interface. The phase change problem is solved by reformulating heat conduction equations with emergence of moving boundary into an enthalpy equation. Numerical solution of the enthalpy equation is obtained by implementing Godunov method and verified by analytical solution of one-dimensional case. Stability condition of the numerical scheme is also discussed. Thermal performance of various PCMs is evaluated via the stored energy and temperature history. The simulation results show that phase change material with the best thermal performance during the first 2.5 hours of energy extraction is shown by erythritol. Moreover, magnesium chloride hexahydrate can maintain temperature of the PCM storage in the range of 110-116.7°C for more than 4 hours while magnesium nitrate hexahydrate is effective only for one hour with the PCM storage temperature around 121-128°C. Among the PCMs that have been tested, it is only erythritol that can cook 10 kg of the loaded water until it reaches 100°C for about 3.5 hours.

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“…[19][20][21][22] The fundamentals of heat transfer in phase change material (PCM) have attracted considerable attention because of the potential use of phase change processes in energy storage applications. [23][24][25][26][27][28][29][30][31][32][33][34][35] In Ref. 31, we studied theoretically the melting process that occurs inside the phase change material cavity heated by lines of higher temperature (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Morphing tree structures for latent thermal energy storage

Ziaei

Lorente

Bejan

2015

Journal of Applied Physics

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Here, we report the numerical study of time dependent storage of energy by melting a phase change material. The heating is provided along invading lines, which change from single-line invasion to tree-shaped invasion. The numerical simulations show that the history of the amount of melted material is S-shaped. We also found that the fastest melting (i.e., the steepest S curve) is discovered by allowing the tree architecture to morph freely, toward greater access over time. The stem length and branching angle of invading trees can be selected such that the complete melting process is shorter. The melting process can also be made faster by increasing the complexity of the tree structure. V C 2015 AIP Publishing LLC. [http://dx

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Numerical simulation of a latent heat thermal energy storage system with enhanced heat conduction

Cited by 179 publications

References 12 publications

Experimental Investigation of Cylindrical Thermal Energy Storage System using Bio-Based Phase Change Materials

Experimental Investigation of Cylindrical Thermal Energy Storage System using Bio-Based Phase Change Materials

Performance Evaluation of Various Phase Change Materials for Thermal Energy Storage of A Solar Cooker via Numerical Simulation

Morphing tree structures for latent thermal energy storage

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