Exergy analysis and energy output improvement of the micro-thermophotovoltaic system via investigating the fractal angles of secondary Y-shaped fins in the micro combustor

Xue, Zongguo; Yan, Yunfei; He, Ziqiang; Shen, Kaiming; Zhang, Chenghua

doi:10.1016/j.fuel.2022.126504

Cited by 17 publications

(3 citation statements)

References 33 publications

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“…It has attracted attention due to its efficient heat and mass transfer capabilities from point to surface. Since its introduction into the field of fluid flow and heat transfer by Adrian Bejan [23], tree-like structures have been applied in radiators [24], microfluidic systems [25], and combustion chambers [26], etc. In order to enhance heat transfer in LHTES, many researchers have combined tree-like fins with phase change.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Heat Transfer Enhancement of Phase Change Materials by Fractal Fins

Guo,

Xu,

Sun

et al. 2024

Energies

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The low thermal conductivity of phase change materials restricts their application fields such as thermal storage and electronic equipment cooling. In order to enhance the heat charging capacity of the phase change unit, fractal fins inspired by plant leaves were designed and manufactured. The changes in the solid–liquid interface, temperature distribution and liquid fraction in the phase change units with fractal fins during melting were investigated experimentally and compared units with the conventional rectangular fin. The results show that fractal fins have better heat transfer enhancement effects than rectangular fins because the enhancement of heat conduction exceeds the suppression of natural convection. Increasing the number of fins can also shorten the melting time and make the temperature distribution more uniform. Compared with the one rectangular fin unit, the full melting time of the unit with three fractal fins is reduced by 17.07%, and the bottom surface temperature is reduced by 27.47%. However, increasing the number of fins while using tree-like fractal fins may cause the fins to inhibit natural convection more than enhance heat conduction. The research in this paper will provide a better understanding of the melting process of phase change units with fins and provide data for future numerical simulations.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Heat Transfer Enhancement of Phase Change Materials by Fractal Fins

Guo,

Xu,

Sun

et al. 2024

Energies

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“…The increasing consumption of fossil fuel causes a serious global issue to the environmental pollution and energy crisis present [1]. The micro energy generator devices have the potential to become a widely energy source due to its high energy output capabilities [2].…”

Section: Introductionmentioning

confidence: 99%

“…An energy output of 5.16 W with a total energy conversion efficiency of 4.27% was realized at 0.18 W/cm 3 . Xue et al [1] investigated the impact of the Y-shaped fins on the energy conversion and exergy of a micro burner. The exergy efficiency could reach up to 44.19%, 44.80%, and 44.80% for fins with angles of 30°, 60°, and 90°, respectively.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Pin Fin Types on the Thermal Improvement of H2/Air Micro Burner

He,

Kang,

Wang

et al. 2023

J. Phys.: Conf. Ser.

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The micro-thermophotovoltaic system is a prospective power generation system. The radiation performance of exterior walls is a critical component of MTPV, as it effectively determines the overall energy output. At a mixture intake speed of 10 m/s, the MCPFs-Diamond exhibits the most favourable thermal performance, as evidenced by the thermal distribution and the highest average temperature of the exterior walls, which measures 1255.3 K. Its available radiation energy can reach up to 43.6 W. In the case of micro combustors that incorporate alternative shapes of pin fins, the highest values for both the average external wall temperature and the available radiational energy are achieved when the gas intake speed is set to 8 m/s.

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A novel two-stage thermophotovoltaic-thermoelectric system based on micro combustion

You

Wang

Yan

et al. 2023

Applied Thermal Engineering

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Exergy analysis and energy output improvement of the micro-thermophotovoltaic system via investigating the fractal angles of secondary Y-shaped fins in the micro combustor

Cited by 17 publications

References 33 publications

Experimental Investigation on Heat Transfer Enhancement of Phase Change Materials by Fractal Fins

Experimental Investigation on Heat Transfer Enhancement of Phase Change Materials by Fractal Fins

Numerical Investigation of Pin Fin Types on the Thermal Improvement of H2/Air Micro Burner

A novel two-stage thermophotovoltaic-thermoelectric system based on micro combustion

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