Research on a large power thermal bubble micro-ejector with induction heating

Hou, Yuepeng; Liu, Bendong; Yang, Jiahui

doi:10.1007/s00542-014-2367-5

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Furthermore, comprehensive studies including CFD and experimentation have been conducted on micro-ejectors, exploring their capacity to supply fuel-air mixtures for micro-combustion applications [20,21]. In [22], the authors investigated a high-powered thermal bubble micro-jet. An induction heater was used to enhance liquid delivery speed.…”

Section: Introductionmentioning

confidence: 99%

Design and Manufacture of a Micro-Ejector and the Testing Stand for Investigation of Micro-Ejector Refrigeration Systems

Śmierciew,

Butrymowicz,

Gagan

et al. 2024

Micromachines

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This paper describes the procedure of design and manufacture of a micro-ejector proposed for miniature ejection refrigeration systems. It describes the procedure of design, fabrication, and experimentation on supersonic micro-ejectors and makes the case for isobutane as a working fluid for such systems. It was demonstrated that it is possible to design and fabricate a micro-ejector with a cooling capacity of approximately 3 W. The discussed micro-ejector was driven by a heat source with temperature below 60 °C. The evaporation temperature was approximately 15 °C. For these operating parameters, the reported entrainment ratio was approximately 0.20. The difficulties in fabricating the micro-ejector due to its small dimensions are discussed in the paper. Additionally, the potential difficulties and solutions related to ensuring and maintaining stable operation of the testing stand are presented. The performance of the proposed system is demonstrated and discussed, including relations between mass entrainment ratio, compression ratio, cooling capacity, and temperature.

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Section: Introductionmentioning

confidence: 99%

Design and Manufacture of a Micro-Ejector and the Testing Stand for Investigation of Micro-Ejector Refrigeration Systems

Śmierciew,

Butrymowicz,

Gagan

et al. 2024

Micromachines

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“…The microscale ejector allows microscale engines and rockets to meet pumping requirements and achieve heating requirements without high-speed microscale turbomachinery. Hou et al [ 7 ] investigated a high-powered thermal bubble micro-jet with an induction heater to increase liquid delivery speed. This new micro-ejector can also be used for micro-scale liquid delivery, micro-drug injection, and 3D printing.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Transonic Flow-Induced Spontaneous Condensation in Micro-Ejector Nozzles

et al. 2023

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Micro-cooling systems are compact refrigeration systems widely applicable in microchemical analysis, biomedicine, and microelectromechanical systems (MEMS). These systems rely on the use of micro-ejectors to achieve precise, fast, and reliable flow and temperature control. However, the efficiency of micro-cooling systems is hindered by spontaneous condensation occurring downstream of the nozzle throat and within the nozzle itself, impacting the performance of the micro-ejector. A micro-scale ejector mathematical model describing wet steam flow was simulated to investigate the steam condensation phenomenon and its influence on flow, incorporating equations for liquid phase mass fraction and droplet number density transfer. The simulation results of wet vapor flow and ideal gas flow were compared and analyzed. The findings revealed that the pressure at the micro-nozzle outlet exceeded predictions based on the ideal gas assumption, while the velocity fell below it. These discrepancies indicated that condensation of the working fluid reduces the pumping capacity and the efficiency of the micro-cooling system. Furthermore, simulations explored the impact of inlet pressure and temperature conditions on spontaneous condensation within the nozzle. The results demonstrated that the properties of the working fluid directly influence transonic flow condensation, underscoring the importance of selecting appropriate working fluid parameters for nozzle design to ensure nozzle stability and optimal micro-ejector operation.

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Design and research of the one-way microsphere valve and the PDMS film electromagnetic micropump

Miao

Chen

et al. 2022

Microfluid Nanofluid

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Research on a large power thermal bubble micro-ejector with induction heating

Cited by 6 publications

References 12 publications

Design and Manufacture of a Micro-Ejector and the Testing Stand for Investigation of Micro-Ejector Refrigeration Systems

Design and Manufacture of a Micro-Ejector and the Testing Stand for Investigation of Micro-Ejector Refrigeration Systems

Numerical Investigation of Transonic Flow-Induced Spontaneous Condensation in Micro-Ejector Nozzles

Design and research of the one-way microsphere valve and the PDMS film electromagnetic micropump

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