Enhancing latent heat storage systems: The impact of PCM volumetric ratios on energy storage rates with auxiliary fluid assistance

Mehrjardi, Seyed Ali Abtahi; Khademi, Alireza; Said, Zafar; Ushak, Svetlana; Chamkha, Ali J.

doi:10.1016/j.nexus.2023.100227

Cited by 9 publications

(2 citation statements)

References 26 publications

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“…This is also supported by the consideration for large production as analyzed in [16], including the usage of graphite to accelerate the heat transfer rate. However, HDPE may be considered as a higher density compared to wax, which means that the volumetric ratio of the system may be changed distinctively [17]. Therefore, exploring another binder material, which comes from the polymer group, is extremely critical to provide a suitable composite material for thermal storing technology.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Evaluation of the operational curve for heat storage technology using n-octacosane/low-density as a binding material

Rahman,

Sulistyo,

Utomo

et al. 2024

EEJET

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Heat storage technology has a critical role for a number of applications involving renewable thermal energy (such as solar water heater). The application of wax (n-octacosane/OCT) as a medium for storing heat brings many positive influences for the system. However, the operational curve is undesirable for the OCT-based energy storage, which makes it necessary to use a binding material. The present work employed LD-class polymer (LDPE) and linear-LDPE as binding materials for OCT. The mixture is prepared through mechanical hot stirring, which comes into two categories: SOCT1 (OCT/LD) and SOCT2 (OCT/LLD). The assessment through the calorimetry method shows an increment in transition temperature for SOCT with a value of 2.1 °C and 5.5 °C. This contributes to the variation of fusion energy for solid-liquid change for both materials, which amounted to 132.05 J/g (SOCT1) and 113.4 J/g (SOCT2). Another assessment related to its chemical and structural phase demonstrates that SOCT has an identical structure to OCT, indicating that SOCT is mixed physically. At the operational level, SOCT is more optimal than OCT according to the indicator related to charge and discharge duration for energy exchange. SOCT1 demonstrates a short plateau line as the indication of a steady transition between 65.4–67.9 °C, while SOCT2 indicates the average heating rate, which is higher than for single OCT. The heat releasing curve for SOCT1 varies at a lower value between 1.92 °C/min and 0.77 °C/min, while SOCT2 has the lowest variation, which is only 0.17 °C/min. Moreover, the self-insulation for SOCT2 has the lowest rate, which is only 0.3 °C/min. The evaluation and analysis from this work show that SOCT is reliable to increase the operational curve of OCT and can be implemented for thermal systems

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Evaluation of the operational curve for heat storage technology using n-octacosane/low-density as a binding material

Rahman,

Sulistyo,

Utomo

et al. 2024

EEJET

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“…With an excess of heat, accumulation (accumulation) occurs, with a shortage, return. For the effective accumulation of heat/cold, provided that the internal air temperature is maintained within the normalized values, enclosing structures have been proposed, which include substances with a phase transition [4][5][6][7][8][9][10][11][12][13]. In the case of intermittent operation of heating (cooling) systems, the heat storage capacity is directly taken into account to improve the accuracy of calculations [11][12].…”

Section: Introductionmentioning

confidence: 99%

Calculation of room temperature drop after an emergency shutdown of heating

Malyavina,

Akhverdashvili

2023

E3S Web Conf.

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The method of calculating the cooling rate of a room when the heating system is turned off there is an important practical task. As a result of such calculation, the time within which the room will cool down to an acceptable temperature, is indicated. During this time, emergency brigades must restore heating in the building. The aim of the work is to provide some refinement of the existing fundamental calculation formula by taking into account additional factors affecting the cooling process of the room. These include: taking into account the time of the initial irregular cooling process, taking into account the heat storage capacity of internal enclosing structures and furniture or equipment in the room, consideration of the initial temperature conditions in external and internal enclosing structures when calculating their heat capacity. The proposed approximate engineering technique is verified by comparing the calculation results with the results of direct calculation by the numerical method of the non-stationary thermal regime of the room in the full statement.

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Experimental Study on the Effect of Different HTF Discharges to Increase Efficiency of a Latent Heat Storage System Using a Spiral Coil Heat Exchanger with Different Fins

Syahbana,

Kurniawan,

Ismail

2024

Int J Thermophys

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Enhancing latent heat storage systems: The impact of PCM volumetric ratios on energy storage rates with auxiliary fluid assistance

Cited by 9 publications

References 26 publications

Evaluation of the operational curve for heat storage technology using n-octacosane/low-density as a binding material

Evaluation of the operational curve for heat storage technology using n-octacosane/low-density as a binding material

Calculation of room temperature drop after an emergency shutdown of heating

Experimental Study on the Effect of Different HTF Discharges to Increase Efficiency of a Latent Heat Storage System Using a Spiral Coil Heat Exchanger with Different Fins

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