Industry > Utilities - Gas and Gas Works
Gas Works
MartinR:
See https://en.wikipedia.org/wiki/Gas_holder in particular the illustration https://en.wikipedia.org/wiki/File:Dip_and_cup.svg shows how the seal was created and maintained as the parts rose and fell.
Lyn L:
Not having a clue about how gas holders work ! just being so used to seeing them in different places. As a young child living in Ramsgate we lived fairly near the Gas works and it always stank of gas. I always thought it was a usual smell of the town 8) .
My eldest son used to work at Grain for Transco later National grid and he has photos of himself inside a gas holder, he said he'd try and find any and let me know.
stuartwaters:
Coal Gas has a very distinctive smell and I remember that as a young child while going to the Strand some years after the conversion to Natural Gas, the place still stank of Coal Gas.
Lutonman:
Here is newish picture of the spiral guided holder at Gillingham just after painting.
Stewie:
--- Quote from: Lutonman on January 02, 2021, 01:59:22 PM ---Stewie,
They did /do not work that way, in fact the opposite. The higher the holder the higher the pressure is created (known as thrown). But the difference in pressure when a holder is full to when nearly empty is not a great deal. Typically pressures were measured in inches water gauge and a full holder on a 3 /4 lift holder would be 12"wg, but as it emptied down to 4" wg. District pressures in those days were much lower as cookers/ fire etc could cope with the lower pressures. Modern boiler just wont work with those type of pressure.
The whole gas supply system was stood on it's head with the advent of Natural gas arriving already being at higher pressures and the job was then to reduce the pressure to a manageable one for the district gas mains. Previously compressors were used to allow the use of medium pressure pipes around town and between the towns. For instance Medway still has a medium pressure 18"ring main now largely replaced by PE pipes originally operating at 20 psi (the maximum allowed for cast iron mechanical jointed pipe). Chatham Dockyard had its own 9" steel pipework fed from both Gillingham and Rochester but only at 5 psi.
--- End quote ---
Thinking about it, if the collapsing telescopic cylinder created pressure in the outlet pipe then it would also need some sort of compressor arrangement to pump it back up again.
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