Assessment of impact of hydrogen cooled generator on power system loadability enhancement

Kumar, Rajendar; Kumar, Ashwani

doi:10.1109/epetsg.2015.7510166

Cited by 1 publication

(2 citation statements)

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“…In the modern energy industry, almost 70 percent of all windings and rotor shafts of power generators with a capacity of more than 60 MW are cooled with hydrogen to prevent overheating under mechanical loads and friction [1][2][3]. The use of gaseous hydrogen as a heat carrier is based on its properties, namely, low density, a high specific heat capacity, and the highest thermal conductivity among all gases (0.168 W/(m•K).…”

Section: Introductionmentioning

confidence: 99%

“…The use of gaseous hydrogen as a heat carrier is based on its properties, namely, low density, a high specific heat capacity, and the highest thermal conductivity among all gases (0.168 W/(m•K). It is a 7-10 times better cooler than air [1][2][3]. Hydrogen gas under a pressure of 0.6 MPa circulates in a closed circuit to remove heat from the active parts and then is cooled by copper gas-water heat exchangers on the stator frame.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen and Corrosion Resistance of Nickel Superalloys for Gas Turbines, Engines Cooled Blades

et al. 2023

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The paper presents the results of the analysis of the resistance to hydrogen and high-temperature salt corrosion of the developed alloy of the CM88Y type for the turbine blades of gas turbine engines for marine and power purposes in comparison with the industrial heat-resistant corrosion-resistant alloy CM88Y and the alloy for the protective coating of the SDP3-A blades. SDP3-A alloy was chosen as a reference sample, which has high hydrogen and corrosion resistance. The new heat-resistant alloy additionally contains such refractory metals as rhenium and tantalum, which are added to the composition of the alloy in order to increase operational characteristics while maintaining phase-structural stability. These are properties such as long-term and fatigue strength, characteristics of plasticity and strength at room and elevated temperatures. Therefore, the purpose of these studies was to determine the resistance to high-temperature salt corrosion of the developed alloy in comparison with the industrial heat-resistant nickel alloy and to evaluate the influence of alloying, hydrogen embrittlement of CM88Y and ZhS3DK alloys with different contents of chromium, boron, zirconium, hafnium, and yttrium were compared. The corrosion resistance of the materials was evaluated after crucible tests in a salt solution at a temperature of 900 °C for 30 h, according to the standard method. The corrosion resistances of alloys were determined by the mass loss, corrosion rate, and data from metallographic studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%