The decomposition products of sulfur hexafluoride (sf6 gas

Under the spark condition, the final toxic products of SF 6 decomposition in the presence of water vapor have been proposed in the literature to be hydrogen fluoride (HF) and sulfur dioxide (SO 2) or sulfuric acid (H 2 SO 4 ). Previous article.Get price

Spreading of overflow water from the Greenland to the

In the summer of 2003 Denmark Strait Overflow Water tagged with deliberately released SF 6 could be traced throughout the Irminger Basin to the central Labrador Sea, confirming that water with potential density of 28.045 contributes to the Denmark Strait Overflow. The upper limit of the transfer time from the central Greenland Sea to the Labrador Sea was found to be 7 years.Get price

Freshwater composition of the waters off southeast Greenland

and tracer data are used to quantify the fractions of Pacific Water, sea ice melt, and meteoric water present in the upper layers of the East Greenland Current (EGC) and East Greenland Coastal Current (EGCC). The EGC/EGCC system dominates the circulation of this region and strongly influences the observed distribution of the three freshwater types.Get price

Study on micro-water measurement method based on sf6 gas

Moisture content is an important indicator of the insulation and arc extinguishing performance of gaz sf6 insulated electrical equipment. The research shows that moisture measurements are strongly influenced by altitude pressures and the different order of pressure correction and temperature correction calculation, different calculation results will result. Therefore, in this paper, we studies theGet price

Sulfr hexafluoride Decomposition in Gas-Insulated Equipment - IEEE Journals

sf 6 Decomposition in Gas-Insulated Equipment Abstract: The increasing application of Sulfr hexafluoride as an insulating gas has led to many studies on Sulfr hexafluoride decomposition in gas-insulated equipment. In the presence-of an electric arc, spark or corona, sf6 gas decomposes to a wide variety of chemically active products which possess completely different properties from sf6 gas.Get price

Effects of micro-water on decomposition of the environment

The results show that OH∙ and H∙ produced by H 2 O exhibited a catalytic effect on the decomposition of C 5 F 10 O. CF 4, C 2 F 6, C 3 F 6, C 3 F 8, C 4 F 10, C 5 F 12, C 6 F 14, C 3 F 7 COH, C 3 F 7 OH, CF 3 COH, C 3 F 7 H, and CF 3 OH were produced in the micro-water environment.Get price

Decomposition Characteristics of sf6 gas under Flashover

Derdouri et al. designed a study on the SF 6 decomposition products when water vapor exists and found that SOF 2 and SO 2 F 2 generate stably in existence of water vapor. Later, it was found that SF 6 decomposition byproducts, including SOF 4, SOF 2, SO 2 F 2, SO 2, HF, would appear as long as water vapor and oxygen existed .Get price

Wastewater Treatment in Greenland

Today all wastewater in Greenland is discharged untreated to the recipients. However, wastewater treatment in the Arctic is challenging due to e.g. the cold climate and settlement pattern. Decentralized solutions, e.g. composting or anaerobic digestion of the blackwater, may be well suited for Greenland.Get price

Effects of micro-water on decomposition of the environment

Finally, the decomposition path of C 5 F 10 O under micro-water condition was evaluated and compared from the viewpoint of molecular dynamics and thermodynamics. Gas insulation is actually to limit the free electrons in a relatively low energy level as a barrier, so the electrical strength of gas is closely related to the ionizationGet price

D. Klockowresearch works | Technische Universität Dortmund

The spark decomposition of gaz sf6 was studied under pressures of 250kPa and 300kPa, which were provided for the insulating gas inside a discharge chamber constructed from stainless steel and TeflonGet price

Hydrocarbon‐degrading bacteria in deep‐water subarctic

As a result, water tempera-ture varies dramatically within only a few hundred metres, from 9–12°C in the top 200 m to subzero tem-peratures below 600 m (Berx 2012). Three sampling sites along a depth gradient in the FSC were chosen to reflect three major zones that are influenced by different water masses (Table 1). The water above ~400 m isGet price

Estimating water volume stored in the south-eastern Greenland

Recent observations of the Greenland ice sheet show an increase of the area affected by progressive melt of snow and ice, thus resulting in production of the additional meltwater. In 2011, an important storage of meltwater in the firn has been observed in the S-E Greenland. This water does not freeze during the wintertime and forms a perennial firn aquifer. The aquifer spatial extent has beenGet price

Chemically Assisted Laser Ablation ICP Mass Spectrometry

Based on experimental observations and previous reports in the literature, sf 6-Si* reaction is proposed as the reaction routine of Sulfr hexafluoride decomposition during the machining.Get price

Micro-Watershed Management for Erosion Control Using Soil and

water Article Micro-Watershed Management for Erosion Control Using Soil and Water Conservation Structures and SWAT Modeling Ghulam Nabi 1, Fiaz Hussain 2,3, Ray-Shyan Wu 2,*, Vinay Nangia 4 and Ri at Bibi 5 1 Centre of Excellence in Water Resources Engineering, University of Engineering and Technology, Lahore 54890, Pakistan; gnabi60@yahoo.comGet price

The formation of Greenland Sea Deep Water: double diffusion

An examination of the extensive hydrographic data sets collected by C.S.S. Hudson and F.S. Meteor in the Norwegian and Greenland Seas during February-June 1982 reveals property distributions and circulation patterns broadly similar to those seen in earlier data sets. These data sets, however, reveal the even stronger role played by topography, with evidence of separate circulation patterns andGet price

Solvay Special Chemicals

Solvay Special Chemicals Sulphur Hexafluoride 5 Sulfr hexafluoride – a gas with unusual properties Solvay‘s sulphur hexafluoride is a non- toxic, inert, insulating and cooling gas ofGet price

Sources and distribution of fresh water in the East Greenland

This fresh water has three sources: Pacific water (relatively fresh cf. Atlantic water), river runoff, and sea ice meltwater. To determine the relative amounts of the three sources of fresh water, in May 2002 we collected water samples across the East Greenland Current in sections from 81.5°N to the Irminger Sea south of Denmark Strait.Get price

Freshwater composition of the waters off southeast Greenland

63 Pacific Water to the North Atlantic via the EGC/EGCC. 64 65 Keywords: Pacific Water, East Greenland Current, Arctic Oscillation, freshwater 66 composition, Cape Farewell, Denmark Strait 67 68 Index terms: Hydrography and tracers, chemical tracers, sea ice, Arctic oceanography 69 70Get price

Isolation, Screening and Activity of Hydrocarbon-Degrading

distilled water, boiled for 10 min in a water bath and then centrifuged for 10 min at 13,000 rpm. The supernatant (total DNA) was placed in a new tube for PCR amplification. The 16s rDNA fragment (1500 bp) was amplified using universal primers; RibS73sp 5'-AGAGTTTGATCCTGGCTCAG-3', and RibS74sp 5'-AAGGAGGTGATCCAGCCGCA-3 ’ [12].Get price

Present oceanographic conditions in Greenland Waters

water components in the Greenland waters originates either from the warm, saline North Atlantic Current or from the cold, low saline Arctic Ocean. The first knowledge of the ocean circulation near Greenland was attained when Erik the Red discovered Greenland in year 982, but it should last almost 900 years before the first nearly rightGet price

Surface meltwater runoff on the Greenland ice sheet estimated

Dec 01, 2019 · However, we suggest that the typical value for the evaporation above open ocean close to Greenland simulated by MAR in summer is ~1 mm/day. We assume this value is transferrable to the open water on the ice surface so we have conducted a simple experiment to estimate evaporative loss from the supraglacial lake surface.Get price

Extensive winter subglacial water storage beneath the

Using radar‐sounding data from two seasons, we identify the seasonal distribution of subglacial water in western Greenland. Our analysis provides evidence of widespread subglacial water storage beneath Greenland in the wintertime. The winter storage is located primarily on bedrock ridges with higher bed elevations in excess of 200 m.Get price

Groundwater Information Sheet, Bacteria Indicators

and letting the water/bleach mixture stand for 30 minutes. · Using water purification tablets that release iodine or chlorine. There are several devices that can be installed within the main water supply system that can treat water prior to distribution: · Chlorinators: Chlorination is the most common water treatment process used worldwide.Get price

Global Monitoring Laboratory - Carbon Cycle Greenhouse Gases

Mar 05, 2021 · The table summarizes annual increases in atmospheric SF 6 based on globally averaged marine surface data.. PDF Version. The annual increase in atmospheric SF 6 in a given year is the increase in its abundance (mole fraction) from January 1 in that year to January 1 of the next year, after the seasonal cycle has been removed (as shown by the black lines in the figure above).Get price

Sources and distribution of fresh water in the East Greenland

Jul 01, 2008 · Fresh water flowing from the Arctic Ocean via the East Greenland Current influences deep water formation in the Nordic Seas as well as the salinity of the surface and deep waters flowing from there. This fresh water has three sources: Pacific water (relatively fresh cf. Atlantic water), river runoff, and sea ice meltwater.Get price

Surface Meltwater Impounded by - Wiley Online Library

Englacial water can control this behavior by either preventing water from reaching the bed or by delaying its release. In this paper, we present detailed observations of water storage within and at the bed of Store Glacier in West Greenland using hourly stationary ice penetrating radar measurements.Get price

USGS Groundwater Dating Lab - Water Resources

The SF 6 mixing ratio in air and the solubility of this gas in water is low. A minimum of a one liter sample of water is required to date groundwater with SF 6. SF 6 Bottle Ordering Information. A true 1-Liter sized, plastic safety coated, amber glass bottle with a polyseal cone lined cap is used. Additional Bottle Info and PicturesGet price

Institute of Food and Agricultural Sciences (IFAS

Soil and Water Science Department Wetland Communities 6/22/2008 WBL 16/22/20086/22/2008 WBL 1 1 • Low pH slows decomposition resulting in “raised peatlands”Get price

dew point display, dew point display Suppliers and

cable length: 5m Function of Model XJZ-3S5 dew point display display dew point value output alarm signal via relay (N. is a ISO9001 certified manufacturer, and also is a hi-tech It has been specialized in designing and producing industrial control solution since 1997.Get price

A continuous pathway for fresh water along the East Greenland

Export from the Arctic and meltwater from the Greenland Ice Sheet together form a southward-flowing coastal current along the East Greenland shelf. This current transports enough fresh water to substantially alter the large-scale circulation of the North Atlantic, yet the coastal current’s origin and fate are poorly known due to our lack of knowledge concerning its north-south connectivity.Get price