R245fa Flow Boiling inside a 4.2 mm ID Microfin Tube
Journal of Physics: Conference Series, 2017 This paper presents the R245fa flow boiling heat transfer and pressure drop measurements inside a mini microfin tube with internal diameter at the fin tip of 4.2 mm, having 40 fins, 0.15 mm high with a helix angle of 18°. The tube was brazed inside a copper plate and electrically heated from the bottom.
LONGO, GIOVANNI ANTONIO +3 more
openaire +3 more sources
Suitability of R404A Boiling Heat Transfer Correlations for 5 mm Microfin Tube
Zhileng xuebao, 2020 The flow boiling heat transfer of R404A in a 5 mm micro-fin tube was studied. A number of flow boiling heat transfer models were selected by comparing the deviation between experimental results and theoretical calculations through a large amount of data ...
He Kuan +3 more
doaj
Influence of Oil on Heat Transfer Characteristics of R410A Flow Boiling in Conventional and Small Size Microfin Tubes [PDF]
, 2014 Compact heat exchangers for refrigeration and air-conditioning systems are beneficial to reduce cost, charge inventory and leakage of refrigerant, and to improve energy efficiency and safety. Using small diameter microfin tubes is one way to decrease the
Ding, Guoliang +5 more
core +1 more source
Investigation on Characteristics of Pressure Drop for Binary Mixture in Horizontal Micro-fin Tube
Zhileng xuebao, 2006 Using non-azeotropic refrigerant mixture R32/R134a as the working fluid,the experimental study on the horizontal micro-fin tubes was conducted.Several factors affecting pressure drop were analyzed,and the characteristics of flow boiling and pressure drop
段雪涛, 马虎根, 邬志敏
doaj +2 more sources
Effect of Fin Geometries on Condensation Heat Transfer and Pressure Drop inside Horizontal Small-Diameter 4 mm Microfin Tubes [PDF]
, 2018 In the refrigeration and air-conditioning fields, small-diameter microfin tubes with an outside diameter of 5 mm or less have been developed; these tubes enhance energy savings by improving the performance of the heat exchanger and by reducing the charge
Hirose, Masataka +2 more
core +1 more source
Evaporation Heat Transfer and Pressure Drop of R32 inside Small-diameter 4.0 mm Tubes [PDF]
, 2016 Experiments were conducted examining pressure drop and heat transfer for flow boiling inside horizontal smooth and two internally helical-grooved small-diameter tubes with outer diameter of 4.0 mm.
Inoue, Norihiro +2 more
core +1 more source
Evaluation of R448A and R450A as Low-GWP alternatives for R404A and R134a using a micro-fin tubes evaporator model [PDF]
, 2016 [EN] When retrofitting new refrigerants in an existing vapour compression system, their adaptation to the heat exchangers is a major concern. R450A and R448A are commercial non-flammable mixtures with low GWP developed to replace the HFCs R134a and R404A,
Abdelaziz +45 more
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Analytical Study of (Ag-Graphene)/Blood Hybrid Nanofluid Influenced by (Platelets-Cylindrical)nanoparticles and Joule Heating via VIM. [PDF]
ACS Omega, 2023 Al-Zahrani AA +5 more
europepmc +1 more source
Boiling Heat Transfer and Pressure Drop of R1234ze(E) inside a Small-Diameter 2.5 mm Microfin Tube [PDF]
, 2018 Currently, the development of high-performance and compact heat exchangers with small- diameter tubes having a hydraulic diameter of less than 5 mm is needed in order to improve the performance of the heat exchanger and to reduce the refrigerant charge ...
Iizuka, Shota +2 more
core +1 more source
Research on Correlation of the Flow Condensation Pressure Drop inside the Micro-fin Tube
Zhileng xuebao, 2020 The two-phase flow-condensation heat transfer experiment of R134a inside the micro-fin tube was operated on the test bench, the influence of working conditions and micro-fin tube structural parameters on the pressure drop was studied, and its ...
Shen Daoming +4 more
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