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Dad, is Hydrogen a Gas?

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One person said: “Only If they are determined to go ahead with this nonsense .... it would be so much easier (and a lot cheaper) - to produce the hydrogen and burn it in power stations to produce electricity - which every home can use for heating. Rather than digging up the nation - to lay down yellow pipes to deliver hydrogen.”

Z.

 

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    well the gas main replacement program was supposed to be finished by now, and all the black iron should have gone from underground.  Like the removal of neutral fuses, it's just another govt programme running  late.

    Luckily at the pressures of street mains the polyethylene pipes and fusion welded joints are very good for hydrogen as well as the methane they were installed for.  Recall the old town gas was perhaps 40% hydrogen depending on the local gasworks and the feed stock, and we had a mix of black iron and thin-wall lead at that point.

    The bigger problem is making hydrogen at scale without using more energy than we do already -I suspect if to comes at all,  it will come in as a 10%  then maybe 20-25% blend with the methane first, as this will burn in unmodified domestic gear and also in power stations.

    Pure hydrogen flames are not as electrically conductive or as visible as methane, so some flame detector designs will need a rethink - those involving photocells and conduction between electrodes in the flame.. And with a large hydrogen fraction the gas-air mix and flame veolicity changes enough that new jets and air intake mixing methods are needed as well.

    mike

     

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  • 0

    well the gas main replacement program was supposed to be finished by now, and all the black iron should have gone from underground.  Like the removal of neutral fuses, it's just another govt programme running  late.

    Luckily at the pressures of street mains the polyethylene pipes and fusion welded joints are very good for hydrogen as well as the methane they were installed for.  Recall the old town gas was perhaps 40% hydrogen depending on the local gasworks and the feed stock, and we had a mix of black iron and thin-wall lead at that point.

    The bigger problem is making hydrogen at scale without using more energy than we do already -I suspect if to comes at all,  it will come in as a 10%  then maybe 20-25% blend with the methane first, as this will burn in unmodified domestic gear and also in power stations.

    Pure hydrogen flames are not as electrically conductive or as visible as methane, so some flame detector designs will need a rethink - those involving photocells and conduction between electrodes in the flame.. And with a large hydrogen fraction the gas-air mix and flame veolicity changes enough that new jets and air intake mixing methods are needed as well.

    mike

     

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