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<t>Hi William an Joe,<br/> <br/> First to reply to William.<br/> 1).The pressures for superheated steam will be locally very high but diminish with <br/> temperature and steam movement along the pressure tube. Alan Roberts says that 8mm <br/> ID tube with 2mm walls in 316 SS has a bursting presure o...

<t>Hi from down underOur group is called the Climate change action networkwe are planning on storing the heat from a tracked 3m dish in hot rocks.Estimated reservoir for household energy after one weeks rainy weather is 1 cu metre of dolerite/blue metal/basalt , held in a kiln like store with 6inces...