Why building a 8×8 inch BigH?
While we continue with the TwinBaby, the BigH represents our zealous effort to design a electrolyser for a small generator. We read the ridicule on how in the end things may not measure up when too much energy is spent to produce enough HHO to drive a small engine – hybrid or 100% HHO. We know the challenge to go on this path, the thrill is to see things with your own eyes!
Assembling The BigH - 8x8 inch experimental hydrogen generator. What did we learn? The Tero concept works except that we have to manage the heat builds up over time. The bottom small 5mm holes (interspered to reduce current leakage between plates) were found to work, however to detrimental effect when we realized that the eventual heat builds up has caused runaway current and hence energy lost!
The BigH - completed unit with alu. stand (21 plates: 5T + 4Nx4) Potential gas production is up to 5.0 LPM... What did we learn? Our battery powered 12Vdc 10Amp supply can hardly jump start electrolysis. The use of 3mm Neoprene as the gasket also adds potential difference between the plates. So the need for higher DC voltage has led us into using a 0~250ac Variac (variable transformer)...Ã‚Â
Side view of BigH - With the Variac, we boost the voltage to 50Vdc @ around 12Amp, the gas production can be easily manipulated. What did we learn? We confirmed Bob Boyles' electrolysis efficiency which is to maintain the voltage between plates to within the range of 1.76 ~ 2.30Vdc. Our tests show that the higher end of such voltage will optimize the gas production, while going beyond 2.5Vdc will generate heat and reduce the efficiency of the electrolyser.
The BigH Twin Top 3/8" conduit - for gas & electrolyte exit. What did we learn? The use of 1/4" conduit will impede flow rate and should be avoided. The rate of flow, either in or out is dependent on each other. Obvious sign of poor flow will cause low electrolyte level which will reduce electrolysis and gas production, thus retarding the out-flow as well as the in-flow of electrolyte to cool the unit.
Close up on the BigH electrical terminals - tested to work safely with 40Amp. What did we learn? Avoid electrical resistance due to use of small or poor conductor. Must always check to make sure all electrical terminals are cool even after prolong operation. Heated terminal is a sign of poor or loosen electrical connection.
0~250Vac 20Amp Variable Transformer - This is the Variac used to drive our BigH. What did we learn? P=IV, increase the Voltage to reduce the Current... One key ingredient to improve electrolysis is likely to hail from the direct bridge rectification... Yes, the ripple effect helps in gas production!