A Redesign Methodology to Improve the Performance of a Thermal Energy Storage with Phase Change Materials: A Numerical Approach

I, Bernal; James, A. M.; Rosario, Maria De Los Ángeles Ortega Del; Saghir, M. Ziad

doi:10.3390/en15030960

Cited by 10 publications

(7 citation statements)

References 48 publications

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“…Table 3 shows that the maximum outlet water temperature in the present study was always higher than that obtained by ref. [27,36,37]. This can be explained by the using of the higher melting temperature PCM (50 • C) compared to the previous studies.…”

Section: Resultsmentioning

confidence: 70%

“…The majority of this research asserted that it showed the beneficial effects of adding PCMs in terms of various methods and criteria, including system efficiency, energy storage capacity, shifting hours, and energy savings. In order to present the practicality of the proposed system and its efficiency in comparison with other proposed systems, the maximum outlet water temperature and the highest thermal efficiency obtained from the proposed system were compared to that obtained by the previous studies [27,36,37] and presented in Table 3. The literature shows a limited number of investigations on PCM thermal storage tanks coupled with a solar thermal collector to provide domestic hot water.…”

Section: Resultsmentioning

confidence: 99%

“…In their research, it was found that the SWH-PCM tank has an efficiency of 58%. Harris B. et al [37] implemented a redesign methodology to enhance an existing TES with PCM system for a SWH tank. Their results show that the redesigned TES reached a minimum outlet water temperature of 45.30 • C and a thermal efficiency of 76.08%.…”

Section: Resultsmentioning

confidence: 99%

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Parametric Analysis of a Solar Water Heater Integrated with PCM for Load Shifting

2022

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Integrating a solar water heater (SWH) with a phase change material (PCM)-based latent heat storage is an attractive method for transferring load from peak to off-peak hours. This transferring load varies as the physical parameters of the PCM change. Thus, the aim of this study is to perform a parametric analysis of the SWH on the basis of the PCM’s thermophysical properties. A mathematical model was established, and a computation code was developed to describe the physical phenomenon of heat storage/release in/from the SWH system. The thermal energy stored and the energy efficiency are used as key performance indicators of the new SWH–PCM system. The obtained numerical results demonstrate that the used key performance indicators were significantly impacted by the PCM thermo-physical properties (melting temperature, density, and latent heat). Using this model, various numerical simulations are performed, and the results indicate that, SWH with PCM, 20.2% of thermal energy on-peak periods load is shifted to the off-peak period. In addition, by increasing the PCM’s density and enthalpy, higher load shifting is observed. In addition, the PCM, which has a lower melting point, can help the SWH retain water temperature for a longer period of time. There are optimal PCM thermo-physical properties that give the best specific energy recovery and thermal efficiency of the SWH–PCM system. For the proposed SWH–PCM system, the optimal PCM thermo-physical properties, i.e., the melting temperature is 313 K, the density is 3200 kg/m3, and the latent heat is 520 kg/kg.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

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Parametric Analysis of a Solar Water Heater Integrated with PCM for Load Shifting

2022

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“…Thermal storage systems based on phase change materials (PCM) allow for high energy storage density with very small temperature variations. A thermal energy storage system with PCM [1] in the configuration of a heat exchanger has been redesigned, concluding that the type, encapsulation shape, and amount of PCM slightly impacted the system's performance; however, selecting a suitable sensible heat storage material had the highest impact on meeting the system's targets. A PCM storage system, which therefore utilizes the latent heat of fusion energy, can store from 5 to up to 14 times more heat per unit of volume than a system based only on sensible energy [2].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of New PCM Thermal Storage Systems

Fabbri,

Greppi,

Amati

2024

Energies

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In this paper, a thermal storage system based on a phase change material is proposed and investigated. The system is composed of several tubes that cross a phase change material mass. A fluid flowing in the tubes charges and discharges the heat storage system. A mathematical model of the system has been developed, which provides the time and space distribution of velocity, temperature, and liquid phase-changing material concentration in a non-stationary regime. A hybrid solution method based on finite volumes and finite differences techniques has been employed for the model equations in the MATLAB environment. To the tubes, a rectangular cross section has been assigned. The performance of the system in terms of accumulated energy density and accumulated power density has been investigated by varying some geometric parameters. The considered geometric parameters influence the number of tubes per unit of system width, the tube hydraulic resistance, the amount of phase change material around each tube, the heat transfer surface of the tube, and the heat storage velocity. In the parametric analysis, peaks have been evidenced in the investigated performance parameters at different instants after the beginning of the heat storage.

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“…Despite the promising strides in solar energy applications, challenges persist, including intermittency, lower thermal efficiency compared to conventional sources, and temporal imbalances [4]. Addressing these hurdles requires tapping into the energy storage capabilities of specific materials to guarantee availability when required [5].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancements Assessment in Hot Water Generation with Phase Change Materials (PCMs): A Review

Berrocal,

Blandon Rodriguez,

Ortega Del Rosario

et al. 2024

Energies

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The utilization of phase change materials (PCMs) in solar water heating systems (SWHS) has undergone notable advancements, driven by a rising demand for systems delivering superior performance and efficiency. Extensive research suggests that enhancing heat transfer (HTE) in storage systems is crucial for achieving these improvements. This review employs a bibliometric analysis to track the evolution of HTE methods within this field. While current literature underscores the necessity for further exploration into hot water generation applications, several methodologies exhibit significant promise. Particularly, strategies such as fins, encapsulation, and porous media emerge as prominent HTE techniques, alongside nanofluids, which hold the potential for augmenting solar water heating systems. This review also identifies numerous unexplored techniques awaiting investigation, aiming to pave new paths in research and application within the field of hot water generation. It highlights methods that could be used independently or alongside predominantly used techniques.

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A Redesign Methodology to Improve the Performance of a Thermal Energy Storage with Phase Change Materials: A Numerical Approach

Cited by 10 publications

References 48 publications

Parametric Analysis of a Solar Water Heater Integrated with PCM for Load Shifting

Parametric Analysis of a Solar Water Heater Integrated with PCM for Load Shifting

Numerical Analysis of New PCM Thermal Storage Systems

Heat Transfer Enhancements Assessment in Hot Water Generation with Phase Change Materials (PCMs): A Review

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