On flow boiling of R-1270 in a small horizontal tube: Flow patterns and heat transfer

被引：16
作者：
de Oliveira, Jeferson Diehl [1 ]
Copetti, Jacqueline Biancon [2 ]
Passos, Julio Cesar [3 ]
van der Geld, Cees W. M. [4 ]
机构：
[1] Univ Ctr Serra Gaucha, Ctr Innovat & Technol, Dept Mech Engn, BR-95020472 Caxias Do Sul, RS, Brazil
[2] Univ Vale Rio dos Sinos, Lab Thermal & Fluid Dynam Studies, LETEF, BR-93022750 Sao Leopoldo, RS, Brazil
[3] Univ Fed Santa Catarina, Dept Mech Engn, Lab Proc Engn & Energy Technol, LEPTEN, BR-88010900 Florianopolis, SC, Brazil
[4] Eindhoven Univ Technol, Dept Chem Engn & Chem, Dolech 2, NL-5612 AZ Eindhoven, Netherlands
来源：
APPLIED THERMAL ENGINEERING | 2020年 / 178卷
关键词：
Flow patterns; Heat transfer; Flow boiling; Propylene; Minichannel; Horizontal tube; PRESSURE-DROP CHARACTERISTICS; PART I; GENERAL CORRELATION; TURBULENT PIPE; R-600A; PROPANE; SMOOTH; EVAPORATION; MODEL; R290;
D O I：
10.1016/j.applthermaleng.2020.115403
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental study was performed to investigate both flow patterns and heat transfer during flow boiling of propylene (R-1270) at a saturation temperature of 25 degrees C in a small circular tube with an inner diameter of 1.0 mm. The heat flux was varied from 5 to 60 kW/m(2) and the mass flux ranged from 240 up to 480 kg/m(2)s, with vapor quality ranging from 0.01 to 0.99. Five flow patterns were identified: plug flow, slug flow, churn flow, wavy- and (smooth) annular flow. The influence of the heat flux, mass flux, vapor quality and flow pattern on the heat transfer coefficient are quantified and analyzed. The new experimental heat transfer coefficients were compared with predictions of correlations found in literature and recommendations are presented.
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页数：14
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