RE: And they are off!3 Jul 2024 11:33
The interweb tells me that the volume of St Paul's Cathedral is 152,000 cubic meters (m³). Surely twice that is still an insignificant amount of storage?
At 50 bar pressure and room temperature (20°C), 1 cubic metre can hold around 4kg of hydrogen. So, 300k cubic metres can hold around 12 tonnes of Hydrogen. Not even rampable...