Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels

This article presents the results of flow visualization studies of Novec refrigerants during condensation in minichannels. Experimental investigation of two-phase flow regimes was conducted in minichannels with internal diameter <i>d<sub>h</sub></i> = 2.5, 2.0, 1.2, and 0.5 m...

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Autor principal:	Małgorzata Sikora
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	flow structures condensation minichannels flow maps image analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/3648b79a441645789189a08ad62ee9ba
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spelling	oai:doaj.org-article:3648b79a441645789189a08ad62ee9ba2021-11-25T18:14:28ZFlow Structure Investigations during Novec Refrigerant Condensation in Minichannels10.3390/ma142268891996-1944https://doaj.org/article/3648b79a441645789189a08ad62ee9ba2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6889https://doaj.org/toc/1996-1944This article presents the results of flow visualization studies of Novec refrigerants during condensation in minichannels. Experimental investigation of two-phase flow regimes was conducted in minichannels with internal diameter <i>d<sub>h</sub></i> = 2.5, 2.0, 1.2, and 0.5 mm. Images of the two-phase flow structures were analyzed by using the MATLAB algorithm. To calculate void fraction, a two-dimensional areal quantitative stereology technique was used. Observation of flow structures formed during the process of condensation was the major aim of the investigations. The condensation studies were conducted over a wide range of mass flux densities (G = 80–5500 kg/m<sup>2</sup>s) and saturation temperatures (<i>t<sub>s</sub></i> = 30–70 °C). Visualization results and image analysis methods are described in this paper. Based on the experimental results, a flow structure map was constructed and presented.Małgorzata SikoraMDPI AGarticleflow structurescondensationminichannelsflow mapsimage analysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6889, p 6889 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	flow structures condensation minichannels flow maps image analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	flow structures condensation minichannels flow maps image analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Małgorzata Sikora Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
description	This article presents the results of flow visualization studies of Novec refrigerants during condensation in minichannels. Experimental investigation of two-phase flow regimes was conducted in minichannels with internal diameter <i>d<sub>h</sub></i> = 2.5, 2.0, 1.2, and 0.5 mm. Images of the two-phase flow structures were analyzed by using the MATLAB algorithm. To calculate void fraction, a two-dimensional areal quantitative stereology technique was used. Observation of flow structures formed during the process of condensation was the major aim of the investigations. The condensation studies were conducted over a wide range of mass flux densities (G = 80–5500 kg/m<sup>2</sup>s) and saturation temperatures (<i>t<sub>s</sub></i> = 30–70 °C). Visualization results and image analysis methods are described in this paper. Based on the experimental results, a flow structure map was constructed and presented.
format	article
author	Małgorzata Sikora
author_facet	Małgorzata Sikora
author_sort	Małgorzata Sikora
title	Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
title_short	Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
title_full	Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
title_fullStr	Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
title_full_unstemmed	Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels
title_sort	flow structure investigations during novec refrigerant condensation in minichannels
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3648b79a441645789189a08ad62ee9ba
work_keys_str_mv	AT małgorzatasikora flowstructureinvestigationsduringnovecrefrigerantcondensationinminichannels
_version_	1718411430183567360

Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels

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