Analysis and optimization of a latent thermal energy storage system with embedded heat pipes

Nithyanandam, Karthik; Pitchumani, R.

doi:10.1016/j.ijheatmasstransfer.2011.06.018

Cited by 125 publications

(35 citation statements)

References 26 publications

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“…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%

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: 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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“…Two different configurations were considered in both charging and discharging processes to study the impact of number of HPs as well as their orientation relative to the flow direction on the thermal behavior of HP-assisted LHTES system. Nithyanandam and Pitchumani [39] developed a similar thermal resistance network model with a quasi-steady approach to evaluate the performance of the system during charging and discharging. The effects of heat pipe and LHTES geometric parameters on the transient thermal response of the system were assessed.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of finned heat pipe-assisted thermal energy storage system with high temperature phase change material

Tiari

Qiu

Mahdavi

2015

Energy Conversion and Management

260

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“…This limiting characteristic can be circumnavigated by adding heat transfer enhancers to the storage container and embedding the phase change material into it. Different HTE's have been investigated, such as metal foams [11], graphite matrix [12], adding of metal particles, encapsulating the phase change materials and by extending the heat transfer surface of the heat exchangers with fins [13] and short heat pipes [14]. Long heat pipes have also been suggested in thermal storage systems because of high heat transfer rates, and the heat is extracted over a larger distance especially during the critical solidification phase of the phase change material [6][7][8][9].…”

Section: Literature Studymentioning

confidence: 99%

Solar Thermal Energy Storage in Power Generation Using Phase Change Material with Heat Pipes and Fins to Enhance Heat Transfer

2015

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Phase change materials absorb or otherwise release heat at close to a constant temperature during its melting and solidification phases. This is a very sought after property in power generation, where a high temperature heat source is required within a narrow temperature range as heat input for the turbine. Solar tower technology provides a high temperature heat source, but unfortunately it is time dependent. A sufficient amount of this heat may be stored in a phase change storage system which can deliver dispatchable heat. In such a storage system the phase change material needs to be exposed to a sufficient heat transfer area to melt or solidify at sufficient rates. In this study this is achieved with heat pipes with metallic fins. The analysis of this design included testing an experimental module during heat absorption and heat removal cycles, as well as a numerical analysis to model the storage module. To determine the parameters for a specific phase change storage system in a high temperature solar tower application the validated numerical thermal response simulation is incorporated. Certain solar input conditions and load cases are applied to the phase change storage system model and the size and geometry of the solar thermal storage system are determined from this analysis.

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Analysis and optimization of a latent thermal energy storage system with embedded heat pipes

Cited by 125 publications

References 26 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

Numerical study of finned heat pipe-assisted thermal energy storage system with high temperature phase change material

Solar Thermal Energy Storage in Power Generation Using Phase Change Material with Heat Pipes and Fins to Enhance Heat Transfer

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