Investigation of the insulation performance of a new gas mixture with extremely low GWP

Mantilla, Javier; Gariboldi, N.; Grob, Stephan; Claessens, M.

doi:10.1109/eic.2014.6869432

Cited by 106 publications

(77 citation statements)

References 6 publications

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“…Fluoroketones C 5 F 10 O and C 6 F 12 O are substantially non-toxic in the pure state (Table 10) and present high insulation capabilities, in particular a high dielectric strength (or breakdown field strength), and at the same time an extremely low global warming potential (GWP) can be obtained [36,41,42].…”

Section: Fluoroketones (Fks) and Fluoroketone Mixturesmentioning

confidence: 99%

Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF6) Gas in High-Voltage Power Network Applications

2017

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Abstract:The growing environmental challenge of electrical energy systems has prompted a substantial increase in renewable energy generation. Such generation systems allow for significant reduction of CO 2 emissions compared with a traditional fossil fuel plant. Furthermore, several improvements in power systems network configuration and operation combined with new technologies have enabled reduction of losses and energy demand, thus contributing to reduction of CO 2 emissions. Another environmental threat identified in electrical networks is the leaking of insulating sulfur hexafluoride (SF 6 ) gas used in electrical gas insulated substations (GIS) and equipment. Because of its Global Warming Potential (GWP) of nearly 24,000 and its long life in the atmosphere (over 3000 years), SF 6 gas was recognized as a greenhouse gas at the 1997 COP3; since then its use and emissions in the atmosphere have been regulated by international treaties. It is expected that as soon as an alternative insulating gas is found, SF 6 use in high-voltage (HV) equipment will be banned. This paper presents an overview of the key research advances made in recent years in the quest to find eco-friendly gases to replace SF 6 . The review reports the main properties of candidate gases that are being investigated; in particular, natural gases (dry air, N 2 or CO 2 ) and polyfluorinated gases especially Trifluoroiodomethane (CF 3 I), Perfluorinated Ketones, Octafluorotetra-hydrofuran, Hydrofluoroolefin (HFOs), and Fluoronitriles are presented and their strengths and weaknesses are discussed with an emphasis on their dielectric properties (especially their dielectric strength), GWP, and boiling point with respect to the minimum operating temperature for HV power network applications.

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Section: Fluoroketones (Fks) and Fluoroketone Mixturesmentioning

confidence: 99%

Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF6) Gas in High-Voltage Power Network Applications

2017

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“…The saturated vapor pressure of the gas satisfies the Antoine equation, and the saturated vapor pressure of C6F12O is 40 kPa at 25 °C [13]. The Antoine equation is used to obtain the relation between saturated vapor pressure and the liquefaction temperature of C6F12O: lgp = −3719.7385/T + 18.180 (1) where T is the liquefaction temperature of gas, and p is the saturated vapor pressure of C6F12O.…”

Section: Methodsmentioning

confidence: 99%

“…C 6 F 12 O molecule is an ozone depletion potential (ODP) gas with a GWP value close to 1 and dielectric strength of approximately 1.7 times that of pure SF 6 gas [13]. The structure of C 6 F 12 O is mainly the combination of the characteristic double and single bonds of ketone carbonyl and its prominent dielectric strength can be attributed to the strong electron absorption capacity of high fluorine content in molecular structure.…”

Section: Introductionmentioning

confidence: 99%

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

et al. 2017

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This paper explores the decomposition characteristics of a new type of environmentally friendly insulating gas C 6 F 12 O and N 2 mixed gas under AC voltage. The breakdown behavior of 3% C 6 F 12 O and N 2 mixed gas in quasi-uniform field was investigated through a breakdown experiment. The self-recovery of the mixed gas was analyzed by 100 breakdown experiments. The decomposition products of C 6 F 12 O and N 2 under breakdown voltage were determined by gas chromatography-mass spectrometer (GC-MS). Finally, the decomposition process of the products was calculated by density functional theory, and the ionization energy, affinity, and molecular orbital gap of the decomposition products were also calculated. The properties of the decomposition products were analyzed from the aspects of insulation and environmental protection. The experimental results show that the 3% C 6 F 12 O and N 2 mixed gas did not show a downward trend over 100 breakdown tests under a 0.10 MPa breakdown voltage. The decomposition products after breakdown were CF

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“…There has been increasing worldwide effort in the last 10 years to search for alternatives gases that can replace SF 6 for high current switching. Most of the work carried out so far has however focused on the dielectric performance of potential gases such as CF 3 I, C 5 F 10 O and C 4 F 7 N and their mixtures with CO 2 [2][3][4], operating temperature of gas mixture [5], gas decomposition [6] and toxicity [6]. There is a limited amount of experimental work on the interruption capability of the potential alternative gases [7][8][9], but little work towards a quantitative understanding of the mechanisms responsible for the hugely different interruption capabilities of different gases.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms Responsible for Arc Cooling in Different Gases in Turbulent Nozzle Flow

Guo¹,

Zhang²,

Yao³

et al. 2017

PPT

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Abstract.A high voltage gas blast circuit breaker relies on the high speed gas flow in a nozzle to remove the energy due to Ohmic heating at high current and to provide strong arc cooling during the current zero period to interrupt a fault current. The physical mechanisms that are responsible for the hugely different arc cooling capabilities of two gases (SF 6 and air) are studied in the present work and important gas material properties controlling the cooling strength identified.

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Investigation of the insulation performance of a new gas mixture with extremely low GWP

Cited by 106 publications

References 6 publications

Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF6) Gas in High-Voltage Power Network Applications

Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF6) Gas in High-Voltage Power Network Applications

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

Mechanisms Responsible for Arc Cooling in Different Gases in Turbulent Nozzle Flow

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