Thermal Efficiency Improvement of Brayton Cycle in the Presence of Phase Change Material

Khademi, Alireza; Mehrjardi, Seyed Ali Abtahi; Tiari, Saeed; Mazaheri, K.; Shafii, Mohammad Behshad

doi:10.11159/ffhmt22.135

Cited by 10 publications

(2 citation statements)

References 14 publications

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“…The material of heat storage technology is in the development phase to ensures effective performance [8]. Combined sensible and fusion heat for the material significantly improves the cumulative storage capacity [9]. It helps to ensure a suitable volumetric and gravimetric storage capacity.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…LTBs offer a higher energy density and can integrate the sensible properties of the storage material, enhancing their applicability. This combination positions LTBs favorably in terms of technology readiness, making them suitable for a variety of thermal systems, including space heating and water heaters [7,8].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Latent Thermal Battery Performance: A Study of Multistage Organic Phase Change Material Systems

Sulistyo,

Utomo,

Rahman

2023

IJHT

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The efficacy of a latent thermal battery (LTB) system is significantly enhanced through the implementation of a multistage configuration. This study is centered on the utilization of organic phase change material (OPCM) as the storage medium within the LTB, aimed at augmenting the charge and discharge rates of the system. The adoption of a multistage approach effectively mitigates the impact of partial phase transitions within the OPCM, facilitating a higher cumulative charging rate of 2.39℃/min. This arrangement is instrumental in minimizing the instability of heat release from each tank, thereby ensuring a consistent heating process for the working fluid throughout the discharge cycle. Consequently, the multistage LTB demonstrates an elevated power rate, reaching up to 7.64 Watts, with a sustained power duration of 45.5 minutes. Such performance signifies an efficacious heat discharge mechanism, substantially improving the overall functionality of the LTB system. The proposed multistage LTB configuration is particularly advantageous for thermal systems operating at low temperatures, including solar water and air heaters. Additionally, the enhanced charge and discharge rates contribute to an increased effective energy density of the LTB, aligning with the objectives of developing compact and efficient energy storage systems. The findings of this research underscore the potential of multistage LTB systems in maximizing operational efficiency in thermal energy storage, thereby contributing to the advancement of sustainable energy solutions.

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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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Thermal Efficiency Improvement of Brayton Cycle in the Presence of Phase Change Material

Cited by 10 publications

References 14 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

Enhancing Latent Thermal Battery Performance: A Study of Multistage Organic Phase Change Material Systems

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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