Experimental Study on Flow Boiling Heat Transfer Characteristics in Top-Connected Microchannels with a Ni/Ag Micro/Nano Composite Structure DOI Creative Commons
Zeyu Xu, Wei Zhang, Qianqian Zhang

и другие.

Energies, Год журнала: 2025, Номер 18(7), С. 1756 - 1756

Опубликована: Апрель 1, 2025

Microchannel heat exchangers, with their large specific surface area, exhibit high heat/mass transfer efficiency and have a wide range of applications in chemical engineering energy. To enhance microchannel flow boiling transfer, top-connected exchanger Ni/Ag micro/nano composite was designed. Using anhydrous ethanol as the working fluid, comparative experiments were conducted on regular parallel microchannels (RMC), (TCMC), TCMC (TCMC-Ni/Ag). Results show that TCMC-Ni/Ag’s maximum local coefficient reaches 179.84 kW/m2·K, which is 4.1 times RMC. Visualization reveals its strongly hydrophilic increases bubble nucleation density frequency. Under medium-low flux, vapor phase converges region while bubbles form surface; under capillary liquid absorption triggers thin-liquid-film convective evaporation mode, key mechanism for improved performance.

Язык: Английский

Experimental Study on Flow Boiling Heat Transfer Characteristics in Top-Connected Microchannels with a Ni/Ag Micro/Nano Composite Structure DOI Creative Commons
Zeyu Xu, Wei Zhang, Qianqian Zhang

и другие.

Energies, Год журнала: 2025, Номер 18(7), С. 1756 - 1756

Опубликована: Апрель 1, 2025

Microchannel heat exchangers, with their large specific surface area, exhibit high heat/mass transfer efficiency and have a wide range of applications in chemical engineering energy. To enhance microchannel flow boiling transfer, top-connected exchanger Ni/Ag micro/nano composite was designed. Using anhydrous ethanol as the working fluid, comparative experiments were conducted on regular parallel microchannels (RMC), (TCMC), TCMC (TCMC-Ni/Ag). Results show that TCMC-Ni/Ag’s maximum local coefficient reaches 179.84 kW/m2·K, which is 4.1 times RMC. Visualization reveals its strongly hydrophilic increases bubble nucleation density frequency. Under medium-low flux, vapor phase converges region while bubbles form surface; under capillary liquid absorption triggers thin-liquid-film convective evaporation mode, key mechanism for improved performance.

Язык: Английский

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