Analysis of the influence of operating conditions and geometric parameters on heat transfer in water-paraffin shell-and-tube latent thermal energy storage unit

Trp, Anica; Lenić, Kristian; Franković, Bernard

doi:10.1016/j.applthermaleng.2006.02.004

Cited by 169 publications

(55 citation statements)

References 25 publications

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“…The subsequent coefficients for Equation (11) are listed in the following: This model was spatially discretized using the finite volume method resulting in Equation (11), while the time discretization was executed by MATLAB Simulink.…”

Section: Numerical Modelmentioning

confidence: 99%

“…In order to extend the range of application and to achieve better storage performances, research activities have been carried out to examine the heat transfer process [4,7,8]; storage types and configurations like a combination of different PCMs within one storage unit [9][10][11][12][13][14][15]; and the integration of highly heat conductive materials into the storage material, examples of which are copper, aluminum, stainless steel or carbon fiber [16][17][18][19][20][21][22]. These materials can be integrated in different forms, such as fins, honeycombs, wool or brush-form.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Shell-and-Tube Type Latent Thermal Energy Storage Performance with Different Arrangements of Circular Fins

2017

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Latent thermal energy storage (LTS) systems are versatile due to their high-energy storage density within a small temperature range. In shell-and-tube type storage systems fins can be used in order to achieve enhanced charging and discharging power. Typically, circular fins are evenly distributed over the length of the heat exchanger pipe. However, it is yet to be proven that this allocation is the most suitable for every kind of system and application. Consequently, within this paper, a simulation model was developed in order to examine the effect of different fin distributions on the performance of shell-and-tube type latent thermal storage units at discharge. The model was set up in MATLAB Simulink R2015b (The MathWorks, Inc., Natick, MA, USA) based on the enthalpy method and validated by a reference model designed in ANSYS Fluent 15.0 (ANSYS, Inc., Canonsburg, PA, USA). The fin density of the heat exchanger pipe was increased towards the pipe outlet. This concentration of fins was implemented linearly, exponentially or suddenly with the total number of fins remaining constant during the variation of fin allocations. Results show that there is an influence of fin allocation on storage performance. However, the average storage performance at total discharge only increased by three percent with the best allocation compared to an equidistant arrangement.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Shell-and-Tube Type Latent Thermal Energy Storage Performance with Different Arrangements of Circular Fins

2017

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“…From the previous studies of Yang et al [1] and Trp et al [2], the thermal storage depends mainly on the HTF inlet velocity (or mass flow rate), HTF inlet temperature, and geometric parameters. Therefore, the choice of the operating conditions and geometric parameters depends on the required heat transfer rate and the time storage in which the energy will be stored or delivered according to Trp et al [2].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the choice of the operating conditions and geometric parameters depends on the required heat transfer rate and the time storage in which the energy will be stored or delivered according to Trp et al [2]. In order to explore the effect of the adequate choice of the PCM, El Qarnia [3] has studied numerically the thermal performance of a solar latent heat storage unit (LHSU) during charging and discharging cycle by using three kinds of PCMs (n-octadecane, Paraffin wax and Stearic acid) as storage mediums.…”

Section: Introductionmentioning

confidence: 99%

Thermo-convective Study of a Shell and Tube Thermal Energy Storage Unit

Elmeriah

Nehari

Aichouni

2018

Period. Polytech. Mech. Eng.

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In this paper, we have studied numerically thermo-convective characteristics between a heat transfer fluid (HTF) IntroductionThe problems of energies consumption have aggravated due to the increase of industrial, commercial and residential activities; parallelly, the current technological development suffers from the depletion of fossil energy. In such case, there is a huge need to use renewable energy sources because they represent a good solution to such problems, and among the known renewable energies, the thermal solar remains the most exploited type. As it is unstable along the time (day and night) and due to its periodic nature, we must use a thermal energy storage device in order to ensure the continuity of this energy during the time. Amongst the types of thermal storage systems, there is the thermal latent heat storage based on the use of phase change materials (PCMs) which have advantages such as high storage density. Many numerical and experimental studies were performed on the latent thermal energy storage systems.From the previous studies of Yang et al. [1] and Trp et al.[2], the thermal storage depends mainly on the HTF inlet velocity (or mass flow rate), HTF inlet temperature, and geometric parameters. Therefore, the choice of the operating conditions and geometric parameters depends on the required heat transfer rate and the time storage in which the energy will be stored or delivered according to Trp et al. [2]. In order to explore the effect of the adequate choice of the PCM, El Qarnia [3] has studied numerically the thermal performance of a solar latent heat storage unit (LHSU) during charging and discharging cycle by using three kinds of PCMs (n-octadecane, Paraffin wax and Stearic acid) as storage mediums. The results showed that a water production at high temperature depends on the careful selection of PCMs. Recently, Tao and Carey [4] have investigated experimentally the effect of PCM thermo-physical characteristics on the performance of shell and tube LHSU in order to improve its performance. The results have showed that the PCM thermo-physical characteristics are the responsible parameters to improve the time and heat transfer of the system. A phase change process dominated by heat conduction in a shell and tube TES unit has been studied experimentally and numerically by solving a developed analytical model by Kibria et al. [5]

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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%

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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Analysis of the influence of operating conditions and geometric parameters on heat transfer in water-paraffin shell-and-tube latent thermal energy storage unit

Cited by 169 publications

References 25 publications

Numerical Analysis of Shell-and-Tube Type Latent Thermal Energy Storage Performance with Different Arrangements of Circular Fins

Numerical Analysis of Shell-and-Tube Type Latent Thermal Energy Storage Performance with Different Arrangements of Circular Fins

Thermo-convective Study of a Shell and Tube Thermal Energy Storage Unit

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

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