BioGas Powered Hot Water Heater

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Allan Lee Haskell
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BioGas Powered Hot Water Heater

I'm in the US, Los Angeles, and have been searching for a biogas compatible instant hot water heater.  I've been looking at the EcoTemp but the manufacturer tells me they won't support advice on using biogas.  Anyway, I'm hoping to find a solution quickly.  I'm volunteering my time to pull together elements for a portable and off-grid homeless shelter concept (www.ourbackyardhomes.org).  Biodigestion plays huge in the equation... I can be reached/texted at +1.323.420.6196.  Open to your thoughts.

Nick Chase
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Hey Allan,

Hey Allan,
have you checked Puxin? https://puxinbiogas.en.alibaba.com/product/60382832880-803414408/PUXIN_h...

You will need a gas pump as well as the heater needs constant preasure.

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Allan Lee Haskell
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Thank you Nick! What 12v gas

Thank you Nick! What 12v gas pump do you recommend?

Nick Chase
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No idea about 12v pumps...

No idea about 12v pumps... sorry. All I know use 220V...

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Markus Kreis
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BioGas Powered Hot Water Heater

Hi Allan

I can also recommend to you the PUXIN gas heater as mentioned by Nick. I'm using it for more than one year for water heating. According to my long experiance I can recommend you the following for a sucsessfull gas waterheater operation:

  1. The gas jets for most of the gas heaters are not designed for biogas (Methane) operation. That's the reasion why manufacturers don't support it. To make it working, first of all you have to widen the diameter of the jets to 1-1.5mm.

  2. The inlet gas pressure should be between 10-50mbar. I do not use a gas pump, unless the gas pipe between fermenter and heater is more than 5m long.

  3. Please note that the "biogas" leaving the fermenter consists mainly of methane (50-75%), carbon dioxide (25-45%). Approx. 100-2000 ppm will be hydrogen sulfide. The remining are negligible.

  4. Your gas heater will NOT ignite the biogas if the methane concentration is below 50%. This can happen in the beginning of the fermenter operation or if the feed composition is to poor.

  5. Hydrogen sulfide is very agressive and should be reduced to <100 ppm before entering the gas heater. Otherwise the internal heater parts will corrode wihtin short time. Easy methods can be provided if there is interest.

Best regard Markus

 

Allan Lee Haskell
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Thank you Markus:-)

Thank you Markus:-)