Pool boiling heat transfer characteristics of a biosurfactant particle deposited heating surface

Gouda, Rinku Kumar; Pathak, Manabendra; Khan, Mohd. Kaleem

doi:10.1016/j.ijheatmasstransfer.2020.120455

Cited by 14 publications

(2 citation statements)

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“…Three thermocouples (T 1 , T 2 , and T 3 ) are embedded at a distance of 3 mm in the upper portion of the copper block to compute the temperature gradient and calculate the heat flux through the boiling surface. The distance of 3 mm between two successive thermocouples is followed from the available literature, ,, where reasonable accuracy is reported.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…Different surface modification techniques have been extensively employed for the enhancement of pool boiling heat transfer. They are: sintering, electron beam evaporation, micromachinings, , lithography, , anodization, , microelectromechanical systems (MEMS) techniques, electrodeposition, , chemical vapor deposition, , sandblasting, physical vapor deposition, laser-induced machinings, brazing, , deposition of nanoparticles or surfactants, , flame spraying, plasma spraying, etc. For the wide-range applicability of the surface modification technique, it should be robust, scalable, less time-consuming, cost-effective, and mechanically stable/durable for long-term applications.…”

Section: Introductionmentioning

confidence: 99%

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Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

et al. 2023

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To ensure adequate reliability in two-phase cooling systems involving boiling, it is essential to enhance the heat transfer coefficient and maximize the critical heat flux (CHF) limit. A key technique to avoid surface burnout and increase the CHF limit in pool boiling is the frequent coolant supply to the probable dry-out locations. In the present work, we have explored the plasma-spray coating as a surface modification technique for enhancing heat transfer coefficient and CHF value in pool boiling applications. Three plasma-coated aluminum surfaces (C-15, C-20, and C-25) are fabricated on a copper substrate at three different plasma powers of 15, 20, and 25 kW, respectively. Detailed surface morphologies of the plasma-sprayed coatings are presented, and their roles in pool boiling heat transfer mechanisms are analyzed. Plasma-coated surfaces exhibit wickability characteristics and enhanced wettability compared to the plain copper surface. Saturated pool boiling experiments are performed with DI (deionized) water at atmospheric pressure. Plasma spray-coated surfaces show favorable boiling incipience with less wall superheat and more active nucleation sites than the plain copper surface. Compared to the plain copper surface, enhancement values of nearly 68, 60.7, and 55.5% in the heat transfer coefficient are observed for C-15, C-20, and C-25 plasma-coated surfaces, respectively. Experiments could not be performed beyond the heat flux of 197 W/cm 2 due to repeated failure of the cartridge heaters. Based on the experimental measurement of wickabilities, the CHF values of plasma-coated surfaces have been theoretically calculated. Compared to the plain copper surface, a maximum 2.39 times higher CHF value is observed for C-15 plasma-coated surface. Improved wettability and wickability are responsible for CHF enhancement in the case of plasma-coated surfaces. At higher heat flux, capillary wicking and frequent rewetting of the dryout locations delay the burnout phenomenon, enhancing CHF in plasma-coated surfaces. The plasma-spray coating is a robust and scalable process, which can be a potential candidate for high heat flux dissipation in various industrial applications. ■ HIGHLIGHTS • Plasma-sprayed aluminum coatings are fabricated on the copper substrate. • Surface characteristics of plasma-coated surfaces are explored. • Plasma-coated surfaces exhibit enhanced wettability and wickability behavior. • Pool boiling heat transfer characteristics of plasmacoated surfaces are analyzed. • Plasma-coated surfaces have enhanced CHF and HTC than the plain copper surface.

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Section: Experimental Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

et al. 2023

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Experimental Investigation of Pool Boiling Heat Transfer on Cu─Al₂O₃ Composite Coated Patterned Surfaces Using Refrigerant R‐134a

Pingale,

Waghmare,

Katarkar

et al. 2024

Heat Trans

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The present study investigates pool boiling heat transfer (PBHT) of R‐134a on Cu─Al2O3 composite‐coated patterned surfaces (CPSI, CPSII, CPSIII, and CPSIV). Using a wire EDM method, four different types of copper patterned surfaces (PSI, PSII, PSIII, and PSIV) were manufactured. Comparing the heat transfer coefficients (HTCs) of the Cu─Al2O3 composite‐coated patterned surfaces to the uncoated Cu surfaces, a notable enhancement was observed. The maximum HTC improvements of 162%, 178%, 189%, and 211% were observed for CPSI, CPSII, CPSIII, and CPSIV, respectively, when compared with bare Cu surfaces. These results demonstrate the effectiveness of these treatments in enhancing heat transfer compared to bare copper surfaces. The enhancement in PBHT is mainly due to the integration of porous Cu─Al2O3 composite coating with patterned surfaces which resulted in a larger heat transfer area, improved capillary action, and a substantial increase in active nucleation sites.

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Factors influencing heat transfer mechanism in nucleate pool boiling: A comprehensive review with state of the art and future prospects

Kumar

Madanan

2023

Advances in Heat Transfer

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Pool boiling heat transfer characteristics of a biosurfactant particle deposited heating surface

Cited by 14 publications

References 46 publications

Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

Experimental Investigation of Pool Boiling Heat Transfer on Cu─Al₂O₃ Composite Coated Patterned Surfaces Using Refrigerant R‐134a

Factors influencing heat transfer mechanism in nucleate pool boiling: A comprehensive review with state of the art and future prospects

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Pool boiling heat transfer characteristics of a biosurfactant particle deposited heating surface

Cited by 14 publications

References 46 publications

Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

Heat Transfer Characteristics of Pool Boiling with Scalable Plasma-Sprayed Aluminum Coatings

Experimental Investigation of Pool Boiling Heat Transfer on Cu─Al2O3 Composite Coated Patterned Surfaces Using Refrigerant R‐134a

Factors influencing heat transfer mechanism in nucleate pool boiling: A comprehensive review with state of the art and future prospects

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Experimental Investigation of Pool Boiling Heat Transfer on Cu─Al₂O₃ Composite Coated Patterned Surfaces Using Refrigerant R‐134a