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Archive:000/Hydrogen gas: Difference between revisions
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In cases where electrolysis is done in weather below 0°C, such as beside wind turbines in cold parts of the world during winter, losses may be somewhat worse. {{x|The water has to be liquid (not frozen) while it's being electrolyzed to become hydrogen and oxygen. Heating takes energy; then again, maybe the waste heat of electrolysis would already be enough to keep the water liquid. In theory it can: For any amount of H<sub>2</sub>O electrolyzed, the waste heat is 8 times more than what it takes to melt that amount of ice: {{p2|'''[See calculation]'''|{{calc|hydrogen_gas.specific_energy * water.hydrogen_by_mass * (100% - electrolysis.efficiency)|water_fusion_heat}} {{pn|Maybe this belongs on a separate page called "hydrogen gas production in winter weather"?}} }}. For this to work, the hydrogen production system would have to be well-insulated from the weather. }} {{npn}} | In cases where electrolysis is done in weather below 0°C, such as beside wind turbines in cold parts of the world during winter, losses may be somewhat worse. {{x|The water has to be liquid (not frozen) while it's being electrolyzed to become hydrogen and oxygen. Heating takes energy; then again, maybe the waste heat of electrolysis would already be enough to keep the water liquid. In theory it can: For any amount of H<sub>2</sub>O electrolyzed, the waste heat is 8 times more than what it takes to melt that amount of ice: {{p2|'''[See calculation]'''|{{calc|hydrogen_gas.specific_energy * water.hydrogen_by_mass * (100% - electrolysis.efficiency)|water_fusion_heat}} {{pn|Maybe this belongs on a separate page called "hydrogen gas production in winter weather"?}} }}. For this to work, the hydrogen production system would have to be well-insulated from the weather. }} {{npn}} | ||
==Shelf life== | ==Shelf life / storage== | ||
{{sum|{{rn}} }} | {{sum|{{rn}} }} | ||
Chemically, hydrogen is the lightest gas (smallest molecules). This makes it harder to store than other gases, but there are still ways. {{en}} | Chemically, hydrogen is the lightest gas (smallest molecules). This makes it harder to store than other gases, but there are still ways. {{en}} | ||
{{pn-block| | |||
read later: some relevant info might be found in: https://europe.autonews.com/suppliers/faurecia-gets-213m-euros-eu-french-hydrogen-project | |||
<br />basic question: can pressurized hydrogen be stored in (perhaps modified) steel tanks, or will it corrode all but the most expensive materials? | |||
}} | |||
==Pipelines== | ==Pipelines== | ||
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</tab> | </tab> | ||
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TODO: | TODO: compare the hydrogen losses to the hydrogen the earth gains from solar winds | ||
TODO: add new heading: | |||
==Climate effects of leaks== | ==Climate effects of leaks== | ||
Hydrogen is not directly a greenhouse gas, but it slows the breakdown of atmospheric methane (which ''is'' a greenhouse gas). Therefore hydrogen gas leaks do have ''some'' effect on warming the climate. {{qn}} | Hydrogen is not directly a greenhouse gas, but it slows the breakdown of atmospheric methane (which ''is'' a greenhouse gas). Therefore hydrogen gas leaks do have ''some'' effect on warming the climate. {{qn}} | ||