Influence of transient heat flux on boiling flow pattern in a straight microchannel applied in concentrator photovoltaic systems

نویسندگان

چکیده

• A MCHS to cool CPV under transient heat flux was investigated numerically. Flow boiling instability affected by the were investigated. Two-phase flow pattern different sudden increase studied. With from 97.96 580 kW/m2, duration of rapid development period increased 0.03 s 0.066 s. Fluctuation intensity pressure drop in quasi-stable 0.025 0.193. Concentrated photovoltaic (CPV) overheating due high radiation became critical challenge preventing its benefits advancing photoelectric efficiency. To promote application CPV, efficient dissipation becomes key technology. Meanwhile, microchannel boiling, as one most promising solution advance cooling high-flux equipment, has attracted increasing attentions recent years. However, fluctuating and non-uniform fluxes CPVs may lead challenges for CPV. Therefore, phase change phenomenon a with deionized (DI) water studied through numerical modeling on boiling. The effects increases two-phase analyzed. It found that resulted evolutions, much higher leaded serious variation pattern, especially fluctuation elongated restricted bubbles, which evolve annular or even dry-out. vapor volume fraction showed growth rate. When raised kW/m 2 , maximum 0.104 0.8064, bubble length smaller than 0.3 mm 1.5 dry zone, indicating change. Based analysis variation, after receiving divided into three stages: initial period, period. rising s, obviously enlarged, 2.43 kPa 14.51 kPa, 3.3 times 25.6 times, more intensive deeper effect In addition, 0.193, demonstrating advancement increase, should be controlled.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Subcooled two-phase flow boiling in a microchannel heat sink: comparison of conventional numerical models

Subcooled flow boiling in multi-microchannels can be used as an efficient thermal management approach in compact electrical devices. Highly subcooled flow boiling of HFE 7100 is studied in two microchannel heat sinks to choose a proper numerical model for simulating boiling flows in microchannels. Results of five different numerical models, including Volume of Fluid (VOF), Eulerian boiling, Eul...

متن کامل

Experimental Study on the Effect of Magnetic Field on Critical Heat Flux of Ferrofluid Flow Boiling in a Vertical Tube

In the present work, the critical heat flux measurements were performed for the subcooled flow boiling of pure water and magnetic nanofluids (i.e., water + 0.01 and 0.1 vol.% Fe‌‌3O4) in a vertical tube. The effect of applying an external magnetic field on the CHF variation was studied experimentally as well. The obtained results indicated that the subcooled flow boiling CHF in the vertical tub...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Journal of Heat and Mass Transfer

سال: 2022

ISSN: ['1879-2189', '0017-9310']

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2022.122792