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ge h2 leak rate pdf

ge h2 leak rate pdf

A hydrogen-cooled turbo generator is a turbo generator with gaseous hydrogen as a coolant.Hydrogen-cooled turbo generators are designed to provide a low-drag atmosphere and cooling for single-shaft and combined-cycle applications in combination with steam turbines.Because of the high thermal conductivity and other favorable properties of hydrogen gas this is the most common type in its field ...

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  • GER-3751A - GE.com

    leak are early detection and timely repair. Routine leak testing of the stator winding is the best way to determine the existence of leaks. Leak tests, such as Vacuum and Pressure Decay tests, and use of the Stator Leak Monitoring System (SLMS), help detect larger leaks. AFile Size: 707KB

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  • GER-4203 - GE Generator Technology Update

    GE’s development of turbine generators for power generation applications began in the late 1800s when GE leadership became interested in Charles G. Curtis’ impulse turbine. The initial generator designs coupled to this new product utilized air as the cooling media. Significant effort was invested inFile Size: 1MB

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  • Hydrogen for Generator Cooling – The Pressure, Purity and

    LFL 4% H2 in air UFL 75% H2 in air * At normal temperature range. Flammability envelope is wider at high temperature. Hydrogen Flammability Range Hydrogen has a wide flammability range. Unlike most applications involved with flammable gases, where the effort isFile Size: 832KB

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  • How to Establish an Acceptable Leak Rate

    over a period of time. It may leak as little as a few molecules of hydrogen a year to several gallons of fluid per minute. The purpose of establishing a leak rate specification is to define the maximum tolerable leakage that a properly functioning part can tolerate and still meet the customer’s expectation.

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  • Model-Based Detection of Hydrogen Leaks in a Fuel Cell Stack

    leak rate through small orifices [3] and is more difficult to contain. In hydrogen-fed fuel cell stacks, there is always an accepted leak rate, as it is extremely difficult and expensive to completely seal the stacks. An increased leak rate due to cracks in the graphite plates, sealCited by: 4

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  • The General Properties of Si, Ge, SiGe, SiO2 and Si3N4

    Etch rate in Buffered HFa (Å/min) 1000 5-10 a Buffered HF: 34.6% (wt.) NH 4F, 6.8% (wt.) HF, 58.6% H20 TABLE 2 lists physical properties of SiO2 and Si3N4.. [ 2] D. Physical Constants Symbol Name Value q magnitude of electronic charge 1.602 x 10-19 C M0 electron mass in free space 9.109 x 10-31 kg Eo permittivity of vacuum 8.854 x 10-14 F/cm k Boltzmann’s constant 1.381 x 10-23 J/K

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  • Guide to Good Leak Testing - US EPA

    6 Reducing leakage and common leak points Page 6 7 Refrigerant charging Page 7 8 Records Page 7 9 F Gas record sheet Page 8 10 Useful information Page 9 A leak of 1 kg of refrigerant causes approximately the same environmental damage as driving a van 10,000 miles.

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  • Leakage in Generator Hydrogen Cooling System | Automation

    Sep 14, 2016* H2 leakage started to degrade hydrogen leakage: * 6.5 lbs in 9 hours * note hydrogen sense in the main lube oil tanks and in the cooling water head tank with detector * valve out all the coolers to verify as major leak - still leaking Today we have the seals apart looking for

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  • Fundamentals of leak detection - Leybold

    The leak rate of a vessel indicates the amount of gas flow which escapes through the walls of the vessel. It must be noted, however, that the leak rate for a leak depends on the type of gas. If the gas temperature T and the molar mass M of a gas G is known, the gas mass flow can be calculated from the leak rate

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  • Pressure and Flow rate - Bex.com

    Pressure and Flow rate Pressure Definition Absolute Pressure: Absolute pressure is the force per unit area applied to anything, whether that anything is a solid, liquid or gas. Imagine a column of liquid above an area 1 ft by 1 ft. The force exerted on the 1ft x 1 ft area is

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  • Model based detection of hydrogen leaks in a fuel cell stack

    fuel cell stacks there is always an accepted leak level as it is impossible to completely seal the cells. An increase in leak due to rupture of seals can be the cause of a critical concentration of H2 to form which in turn can lead to an explosion. The standard solution to hydrogen leak detection is to

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  • Hydrogen leak detection - low cost distributed gas sensors

    12% in the merchant hydrogen market and a growth rate of 5-6% per year. • There is a growing requirement due to increasing regulations, codes and standards for gas leak detection that can be economically satisfied using our technology. • Due to limited refinery capacity, downtime in the oil and gas refining industry has

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  • HYDROGEN GAS EVOLUTION AND VENTILATION FROM

    leak rate was calculated and substituted in the equation of the above law to solve for the radius. The leak hole radius was found to be 0.15 mm; an opening which would not to be of consequence in the following experimentation. The hydrogen detector used was manufactured by the Mine Safety Appliance Co. in

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  • Leak detection - CERN

    leak rate and the amount of gas entering into a vacuum system. For simplification it is assumed that the pore is a straight channel of circular shape. A diameter of 0.01 mm, e.g. a hair, corresponds to a leak rate of 10 2 mbar l/s. For a pore with a leak rate of Q l = 10 10 mbar l/s = 10 10 cm 3/s, an amount of

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  • Hazards when Purging Hydrogen Gas-Cooled Electric

    Jan 22, 2016leak where the terminal plate was bolted to the bushing box. Repair required workers to enter through a bushing box man-way. Prior to removing the bushing box man-way cover, workers purged the generator housing with carbon dioxide (CO. 2) and then with ambient air. CO. 2.

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  • CNG and Hydrogen Tank Safety, RD, and Testing

    500 km range with 5kg H2. Other multiple cylinder failures attributable to “leakage failure mode”: Type 1 steel pinhole leaks (<50) Type 4 plastic liner leak incidents (100’s) 12. In-Service CNG Tank Ruptures. 13. FAILURE INCIDENTS REPORTED BY FAILURE CAUSE.

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  • Basic PECVD Plasma Processes (SiH based)

    Low rate dep High rate dep KOH rate of SiO2 0.0 nm/ min 2.0 nm/ min 4.0 nm/ min 6.0 nm/ min 8.0 nm/ min 10.0 nm/ min 12.0 nm/ min 14.0 nm/ min 16.0 nm/ min 0 &C 200 &C 400 &C 600 &C 800 &C Low rate dep High rate dep

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  • 7FA Generator Low Hydrogen Purity After HGPI/MAGIC

    Sep 24, 2017After completing a HGP and Magic inspection on our GE 7FA/7FH2 we are dealing with low CE H2 purity. The CE H2 seal was removed for the Magic and inspected and deemed OK by the OEM to be returned to service - faces were cleaned, etc, clearances checked and within tolerance.

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  • Safety Study Related to Hydrogen Leakage from Fuel Cell

    Safety study related to hydrogen leakage from fuel cell systems Jiaqing He The main challenge for the wide spread use of hydrogen in fuel cell systems is the safety concerns due to its ease of leaking, low-energy ignition, large flammability range, high buoyancy and diffusion rate in air.

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  • Leak Rate Calculator | Discover Unknown Leak Test Values

    The leak rate calculator below is used to find either the leak rate or the test cycle time for a Pressure Decay test. LR=(V∙∆P∙60sec/min)/(t sec∙14.7). For more information, see this bulletin. Calculator: Attribute Value; Leak Rate (scc/m) Volume of Part (cc) Time (sec)

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  • Hydrogen as Tracer Gas for Leak Testing

    determining leak rates. If leak testing by means of pressure measurement reveals leakage in excess of permissible levels, the next step is to locate the leak. The tracer-gas method can be used for both leak location and leak testing. It is also ideal for locating smaller leaks. Test objects remain dry, and measurements are unaffected by temperature

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  • NASA Technical Reports Server (NTRS)

    Quantitative leak test design guide Calibrated enclosure technique for rapid and accurate determination of leak rates. Document ID. 19670028318 . Document Type. Contractor Report (CR) Authors. Hollinger, D. L. (General Electric Co. Schenectady, NY, United States) Manganaro, J. L. (General Electric Co. Schenectady, NY,

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  • Hydrogen Storage | Department of Energy

    Hydrogen can be stored physically as either a gas or a liquid. Storage of hydrogen as a gas typically requires high-pressure tanks (350–700 bar [5,000–10,000 psi] tank pressure). Storage of hydrogen as a liquid requires cryogenic temperatures because the boiling

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  • Hydrogen-cooled turbo generator - Wikipedia

    A hydrogen-cooled turbo generator is a turbo generator with gaseous hydrogen as a coolant.Hydrogen-cooled turbo generators are designed to provide a low-drag atmosphere and cooling for single-shaft and combined-cycle applications in combination with steam turbines.Because of the high thermal conductivity and other favorable properties of hydrogen gas this is the most common type in its field

    Get Price
  • DPI 611 Hand-held Pressure Calibrator - Instrumart

    GE Measurement Control DPI 611 Hand-held Pressure Calibrator This fully self-contained pressure test and calibration system combines pressure generation, signal measurement and loop power to provide all the convenience of the Druck DPI 610/615 and yet it’s half the size, twice as accurate and easier to use.

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  • Vivid E95 Ultra Edition | GE Healthcare

    Vivid E95 Ultra Edition is designed to provide you with uncompromised image quality, advanced visualization, easy measurements in 2D and 4D, and automation of tedious tasks with state-of-the-art quantification capabilities for the most complex patients.

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  • AN OVERVIEW OF PIPELINE LEAK DETECTION TECHNOLOGIES

    the selection of a suitable leak detection system. As we have just learned, leak detection systems are subject to official regulations. Leak detection systems must be sensitive, reliable, accurate, and robust. Sensitivity. is a combined measurement which takes into account the minimum detectable leak rate

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  • 1. HYDROGEN FUNDAMENTALS - HySafe

    Leakage rates are by a factor of 50 higher than for water and by a factor of 10 compared to nitrogen. The addition of an odorant or colorant would ease the detection of small leaks; however, this is not practicable in most situations, and not feasible for LH 2. Hydrogen gas dissolved in liquids will permeate into adjoining vessel materials.

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  • example hydrogen seal oil presentation

    Dec 09, 2015• With the leak from the system H2 Seal Oil could no longer maintain seal pressure without causing a large oil leak • By venting H2 the pressure is reduced so it does not blow by the seals and into the atmosphere which would create an explosive condition • Have shift supervisors discuss the event with their crews.

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