Hm... Chelani appears to be completely oblivious to the fact that cooling of his heater wires is primarily via convection in his 7 Bar H2 atmosphere. I know from firsthand experience that a majority of the heat will be carried from the wires to the glass surface directly above the wires. There will be hotspots above the wires and there will also be a big difference between the top and bottom of the glass tube.
Chelani even reports a burnout when he loses hydrogen pressure and yet he still doesn't appear to realize the huge contribution of convection in a hydrogen atmosphere. Until he improves his calorimetric measurement method to measure total output heat flux the results are equivocal. Mark Snoswell
