Low mass flux upward vertical forced flow boiling of HFE7000

Eraghubi, Munir; Marco, Paolo Di; Robinson, A.J.

doi:10.1016/j.expthermflusci.2018.11.011

Cited by 15 publications

(3 citation statements)

References 23 publications

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“…At the same time, visualization studies of vapour bubble formation were carried out to determine the diameter and velocity of bubbles detached from the heat transfer surface [18,19]. A study of the boiling process of HFE refrigerants was also published in the work of Eraghubi et al [38].…”

Section: Application Of Low-pressure Refrigerants In Scientific Researchmentioning

confidence: 99%

New environmentally friendly low-pressurere frigerants mini-channel

2023

Archives of Thermodynamics

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Nowadays, in addition to the thermodynamic properties of refrigerants, their impact on the environment is of high significance. Hence, it is important to use refrigerants with the lowest possible values of ozone depletion potential and global warming potential indices in refrigeration, organic Rankine cycle (ORC), air conditioning, and heat pump systems. Natural refrigerants are the most environmentally friendly; unfortunately, they have less favourable thermodynamic properties. Currently, low-pressure refrigerants from the FC (fluorocarbons, fluorine liquids) and HFE (hydrofluoroether) groups are increasingly used. This paper presents the most important properties and applications of selected refrigerants from these groups and also reviews the literature on their use.

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Section: Application Of Low-pressure Refrigerants In Scientific Researchmentioning

confidence: 99%

New environmentally friendly low-pressurere frigerants mini-channel

2023

Archives of Thermodynamics

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“…The studies were carried out for three mass flux density values, G = 680, 1440 and 3350 kg m −2 s −1 , and a heat flux density up to 10 MW/m 2 . The exchanger was used to cool electronic components, which were heated to 90 • C. Research on HFE 7000 refrigerant boiling was performed by Eraghubia et al [12]. The process of boiling was carried out in a sapphire tube with an internal diameter of 8 mm and a length of 120 mm.…”

Section: Of 18mentioning

confidence: 99%

Experimental Study of HFE 7000 Refrigerant Condensation in Horizontal Pipe Minichannels

2021

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This article presents the results obtained from our own experimental investigations on heat exchange and pressure drop during the condensation flow of the HFE 7000 refrigerant in pipe minichannels with an internal diameter of di = 1.2–2.5 mm. The influence of vapor quality x and the mass flux density G on the two-phase flow pressure drops and heat transfer is presented. The tests were performed for the mass flux density range of G = 110–4700 kg/m2s, saturation inlet temperature of Ts = 36–43 °C and heat flux density of q = 1 ÷ 20 kW/m2. The pressure drop characteristics and heat transfer coefficient as a function of the internal diameter of minichannels are illustrated. The results of experimental research on the heat transfer coefficient and two-phase pressure drop are compared with correlations developed by other authors. The best accuracy has a comparison of experimental study with correlation of Rahman-Kariya-Miyara et al. and Mikielewicz et al.

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“…Woodoc et al [11] investigated the use of HFE7000 refrigerant in a silicone mini heat exchanger (MECH-X), which is a heat sink reactor with a thickness of 800 µm. The exchanger was used to cool electronic components that were heated to 90 • C. The boiling studies of Novec refrigerants (HFE7000, HFE7100, FC-72, and HFE-649) were conducted by Eraghubia et al [17], Piasecka et al [18][19][20], and Cao et al [21], who created a visualization of pool boiling of HFE-649. Mohamadi et al [22], on the other hand, investigated heat transfer with the use of a nanofluid that consisted of an HFE 7000 refrigerant and Al 2 O 3 as well as SiO 2 nanoparticles.…”

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confidence: 99%

Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels

Sikora

2021

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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 dh = 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/m2s) and saturation temperatures (ts = 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.

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Low mass flux upward vertical forced flow boiling of HFE7000

Cited by 15 publications

References 23 publications

New environmentally friendly low-pressurere frigerants mini-channel

New environmentally friendly low-pressurere frigerants mini-channel

Experimental Study of HFE 7000 Refrigerant Condensation in Horizontal Pipe Minichannels

Flow Structure Investigations during Novec Refrigerant Condensation in Minichannels

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