About Hydrogen-cooled generator air temperature
Hydrogen has one of the best heat transfer properties of any gas, with a specific heat of 3.4 Btu/lb-F at standard conditions. On a mass basis, hydrogen is 14 times more efficient than dry air for removing heat .Hydrogen, as the lightest gas, has the lowest density of any stable gas.
A hydrogen-cooled turbo generator is awithas a . Hydrogen-cooled turbo generators are designed to provide a low-atmosphere and cooling for single-shaft and.
Based on the air-cooled turbo generator, gaseousfirst went into service as thein a hydrogen-cooled turbo generator in October 1937, at theCo. in .
The absence ofin the atmosphere within significantly reduces damage to the winding insulation from ; these can be problematic as the generators typically operate at , often 20 kV.Seal oil system .
The use of gaseous hydrogen as a coolant is based on its properties, namely low , high , and the highest(at 0.168 W/(m·K)) of all gases; it is 7 to 10 times better at cooling than air.Another advantage of hydrogen is its easy.
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•Hydrogen has one of the best heat transfer properties of any gas, with a specific heat of 3.4 Btu/lb-F at standard conditions. On a mass basis, hydrogen is 14 times more efficient than dry air for removing heat .Hydrogen, as the lightest gas, has the lowest density of any stable gas.
Hydrogen has one of the best heat transfer properties of any gas, with a specific heat of 3.4 Btu/lb-F at standard conditions. On a mass basis, hydrogen is 14 times more efficient than dry air for removing heat .Hydrogen, as the lightest gas, has the lowest density of any stable gas.
Hydrogen has attractive characteristics as a fluid to bathe the windings of the generator, and to remove heat from the windings and deliver that heat to the cooling water. Hydrogen is nearly the perfect cooling gas, except for its one massive flaw.
Hydrogen cooled power generators are more efficient and have less mass of materials of construction than their air-cooled cousins. Hydrogen gas is 7 times more effective as a heat transfer medium than air and 1/14 th the density, resulting in less friction losses and more fuel converted to electricity.
GE’s hydrogen-cooled generator systems are the right fit for high-efficiency applications and can operate in both simple and combined-cycle power plants. Their high power output makes them a more cost-effective than solution than many water-cooled machines.
The key design considerations are to increase the outlet temperature of the IP turbine to generate more steam in the bottoming cycle and to increase the inlet temperature of the LP turbine to obtain more power. The HTSC power system makes use of the closed-loop cooling systems.
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6 FAQs about [Hydrogen-cooled generator air temperature]
What is a hydrogen cooled generator?
Hydrogen-cooled generators were originally introduced because the combination of the low density and high specific heat of hydrogen made it an ideal cooling medium. The opera-tion, installation and maintenance of an air-cooled generator are generally simpler than that of a hydrogen-cooled generator.
What is the difference between air cooled and hydrogen cooled power generators?
Hydrogen cooled power generators are more efficient and have less mass of materials of construction than their air-cooled cousins. Hydrogen gas is 7 times more effective as a heat transfer medium than air and 1/14 th the density, resulting in less friction losses and more fuel converted to electricity.
Are GE hydrogen cooled generators a good choice?
GE’s hydrogen-cooled generator systems are the right fit for high-efficiency applications and can operate in both simple and combined-cycle power plants. Their high power output makes them a more cost-effective than solution than many water-cooled machines. Automated Hydrogen Gas Control and Sealing
How safe is hydrogen generator cooling?
* At normal temperature range. Flammability envelope is wider at high temperature. Hydrogen has a wide flammability range. Unlike most applications involved with flammable gases, where the effort is to keep the gas below the LFL, the safety of hydrogen generator cooling is based on staying above the UFL.
Why is hydrogen a good gas for a generator?
A high heat capacity to pick up heat with minimum temperature rise. With its low viscosity and high specific heat, hydrogen is the best gas available and is therefore used in large generators where the cooling requirements are severe. Even then the low density of hydrogen is a disadvantage so it is always used at elevated pressure.
What is a hydrogen cooled turbo generator?
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. [ 1] Because of the high thermal conductivity and other favorable properties of hydrogen gas, this is the most common type in its field today.
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