An investigation into the influence of different parameters on the onset of boiling in minichannels

Archives of Thermodynamics

Magdalena PiaseckaCorresponding authorKielce University of Technology, Faculty of Mechatronics and Machine Building, 10-lecia P.P.7, 25-314 Kielce, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Kielce University of Technology, Faculty of Mechatronics and Machine Building, 10-lecia P.P.7, 25-314 Kielce, Poland

关键词: Keywords: Heat transfer;    Flow boiling;    Incipience (onset) of boiling;   

DOI  :  10.2478/v10173-012-0028-6

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

The paper presents experimental studies on boiling heat transfer in rectangular minichannels. The investigations focus on the transition from single phase forced convection to nucleate boiling, i.e., in the zone of boiling incipience. The experiment has been carried out with FC-72, R-123 and R-11 at the Reynolds number below 4700, corresponding to mass flow rate range 95-710 kg/(m s). The main part of the test section is a minichannel of pre-set depth from 0.7 to 2 mm and width (20, 40 and 60 mm), with different spatial orientations from vertical to horizontal and 30% inclination angle adjustment. The objective of the paper includes the impact of selected parameters (liquid flow velocity, pressure and inlet liquid subcooling, channel dimensions and spatial orientation) on the boiling incipience in minichannels. The investigations are intended to develop a correlation for the calculations of the Nusselt number under the conditions of boiling incipience in the minichannel as a function of changeable parameters.

【 授权许可】

Unknown