High voltage insulation properties of HFO1234ze

Koch, M.; Franck, Christian M.

doi:10.1109/tdei.2015.005118

Cited by 47 publications

(48 citation statements)

References 26 publications

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“…Since N sat could not be obtained from the present measurements, it is uncertain up to which pressure the three-body attachment rate will continue increasing quadratically with the gas density following equation (9). At higher pressures, three-body attachment will eventually reach "saturation" and ν eff will depend linearly on the gas pressure according to equation (10).…”

Section: Three-body Electron Attachment To Hfo1234zementioning

confidence: 87%

“…The quantities (k i − k da ) and k quad are obtained as the coefficients from the linear regression of ν eff (N ) on N and N 2 . The quantity N sat cannot be obtained from the present measurements as it does not appear in equation (9). Examples of the regression of equation (9) and (b).…”

Section: Three-body Electron Attachment To Hfo1234zementioning

confidence: 90%

“…Part of these measurements were used for making breakdown voltage predictions in HFO1234ze [9]. The results are available on the online database ETHZ [10].…”

Section: Introductionmentioning

confidence: 99%

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Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Chachereau

Rabie

Franck

2016

Plasma Sources Sci. Technol.

127

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Abstract. In this contribution, the electron swarm parameters of the hydrofluoroolefine HFO1234ze, systematic name 1,3,3,3-Tetrafluoro-1-propene, are experimentally investigated. The analysis of the electron avalanche current measured in a pulsed Townsend experiment yields the effective ionization rate coefficient, the electron drift velocity and the longitudinal electron diffusion coefficient. The subsequent ion current is analyzed as well, to obtain separately the ionization and attachment rate coefficients. Measurements in pure HFO1234ze at different pressures show that the effective ionization rate is strongly influenced by three-body attachment and the three-body attachment rate coefficient is derived.

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Section: Three-body Electron Attachment To Hfo1234zementioning

confidence: 87%

Section: Three-body Electron Attachment To Hfo1234zementioning

confidence: 90%

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Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Chachereau

Rabie

Franck

2016

Plasma Sources Sci. Technol.

127

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“…It has been found previously that the dielectric strength of HFO-1234ze is (0.8-0.95) times that of SF6, [28]. HFO-1234ze is known to be a highly electronegative gas [18]; when free electrons attach to neutral gas molecules, they are converted to heavy, lowmobility negative ions. These negative ions do not have the same capability as free electrons to cause further ionization, [29], [30].…”

Section: Discussionmentioning

confidence: 97%

“…The hydrofluoroolefin gas 1,3,3,3-tetraflouropropene (HFO1234ze) is, potentially, an environmentally-friendly alternative to SF6, as it has a much lower GWP, at a value of 6 in a 100-year time horizon, and an ozone depletion potential of 0 [16], [17]. The gas is also known to be electronegative, so has the attributes to be used as a switching medium [18]. As HFO1234ze is classified as 'mildly flammable' when mixed with air, suitable gas handling precautions must be taken.…”

mentioning

confidence: 99%

Characterization and Statistical Analysis of Breakdown Data for a Corona-Stabilized Switch in Environmentally Friendly Gas Mixtures

Macpherson

Wilson

MacGregor

et al. 2018

IEEE Trans. Plasma Sci.

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This version is available at https://strathprints.strath.ac.uk/64280/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 1Abstract -Characterisation of a corona-stabilised switch in the single-shot regime, including triggering range, delay times and jitter is reported, over the pressure range 0-3 bar gauge, as a continuation of work from similar characterisation with this switch filled with SF6 with different gap spacings. When filled with mixtures of HFO-1234ze and N2, the breakdown voltage can be increased by up to ~306% and ~191% under negative and positive polarity, respectively, of that using 100% N2. These results were achieved with gas mixtures consisting of 80% N2 and 20% HFO-1234ze, by pressure. The maximum negative polarity triggering range was 13.6 kV, comparable to that achieved previously using SF6. The measured delay time and calculated jitter was generally found to increase with increasing pressure, and with increasing percentage (from 5% to 20%) of HFO-1234ze in the gas mixtures.Von Laue statistical analysis of time-to-breakdown data showed that both the formative time and statistical time increased with increasing pressure, and with increasing percentage of HFO-1234ze in the gas mixtures. The formative time under negative polarity was significantly longer than that for positive polarity.The results indicate that HFO-1234ze may be considered as a suitable candidate to replace SF6 for switching applications, although there are some operational observations that require further investigation.

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Stereo‐dependent dimerization, boiling points, diffusion coefficients, and dielectric constants of E/Z‐HFO‐1234ze

Hou

et al. 2021

Int J of Quantum Chemistry

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Stereo-dependent properties of E-and Z-HFO-1234ze were investigated by density functional theory, extrapolated complete basis set limit, explicitly correlation, and symmetry-adapted perturbation theory together with molecular dynamics simulations. The enthalpy of isomerization of E-HFO-1234ze to the Z isomer is 9.7 kJ/mol, showing the reverse cis effect. The HFO-1234ze molecules interact predominantly via π-π stacking of the double bonds and hydrogen bonding of CHÁ Á ÁF. Although the E-dimers involve less steric exchange-repulsion, their binding energies are generally smaller by 2-6 kJ/mol than the Z-dimers, in which the Coulombic multipole-multipole-type electrostatic interactions and the long-range dispersions are more profound. Local ordering in liquid occurs primarily via π stacking of the CHF-end. The significant difference in boiling points of E-and Z-HFO-1234ze is clarified in terms of the dimerization free energy. Self-diffusion coefficients and dielectric constants of HFO-1234ze depend strongly on the E-and Z-conformations.

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High voltage insulation properties of HFO1234ze

Cited by 47 publications

References 26 publications

Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Characterization and Statistical Analysis of Breakdown Data for a Corona-Stabilized Switch in Environmentally Friendly Gas Mixtures

Stereo‐dependent dimerization, boiling points, diffusion coefficients, and dielectric constants of E/Z‐HFO‐1234ze

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