Monotube Flash Boiler Design

[Toymaker]

Glad it did not zap you.

Would a fly back work?

Yes, a flyback transformer would also work,...but I don't have one of those in my spare parts box either. So, I'ld need to order a flyback and incur the same week to 10 day shipping delay. Having a short inside the coil's insulation is pretty rare,...hopefully it's a one-time occurrence for me.

 

[The Ignoble Troll]

Yes, a flyback transformer would also work,...but I don't have one of those in my spare parts box either. So, I'ld need to order a flyback and incur the same week to 10 day shipping delay. Having a short inside the coil's insulation is pretty rare,...hopefully it's a one-time occurrence for me.

If it happens again, the old school neon sign transformers work well.

 

[Toymaker]

Shortly after typing my last post where I mentioned how rare it is to have coil wires inside a transformer develop a short, I remembered that I never had a problem with the coils (aka transformers) on the two previous high voltage boards, which suffered shorts on the high voltage circuit boards, but the coils were undamaged. So I dug through my spare parts box, and lucky me, the coils on the dead circuit boards were the same as the shorted coil. I was able to replace the shorted bad coil with a good one from the bad circuit board, and now my ignitor board is back up and working

So out to the test stand to make a little steam.

Well, a little steam was all I could get. The burner flame keeps going out periodically, causing an auto re-start sequence. So, I'm sitting in front of my computer trying to understand why this is happening.

I've got some ideas,...so back to the test stand for a little investigation.

 

[Toymaker]

Problem found and fixed A tiny, nearly invisible tear developed in the silicone tube I use for the fuel line, and because the fuel is sucked into the fuel nozzle via venturi effect, and not forced into the nozzle by a fuel pump, air was being sucked into the fuel line through the tiny tear, creating air bubbles in the line which, upon reaching the fuel nozzle, cause the burner flame to go out. Sometimes, it's the littlest things that cause the biggest headaches.

 

[The Ignoble Troll]

Problem found and fixed A tiny, nearly invisible tear developed in the silicone tube I use for the fuel line, and because the fuel is sucked into the fuel nozzle via venturi effect, and not forced into the nozzle by a fuel pump, air was being sucked into the fuel line through the tiny tear, creating air bubbles in the line which, upon reaching the fuel nozzle, cause the burner flame to go out. Sometimes, it's the littlest things that cause the biggest headaches.

Nice catch!

 

[The Ignoble Troll]

@Toymaker

Just a thought...

You have a burn can ECU, you know electronics and your stated goal is to move lots of air...

What about ditching the boiler and getting two of those cheap Amazon/Ebay small turbo chargers.

Rig up one turbo charger as a turbine engine with your flame can burner and then use the second turbo charger as your air blower.

You could use water injection to get more power and help keep the turbos cool.

You could also use the tesla turbine on the final turbo, to power an oil coolant/lubrication pump.

You could ditch the leaf blower this way.


This would take a lot of phase changes out of the equation which would increase efficiency.

If you reworked the final turbo to have a longer shaft, you could have it directly turning a larger blower.

 

[Nerd1000]

@Toymaker

Just a thought...

You have a burn can ECU, you know electronics and your stated goal is to move lots of air...

What about ditching the boiler and getting two of those cheap Amazon/Ebay small turbo chargers.

Rig up one turbo charger as a turbine engine with your flame can burner and then use the second turbo charger as your air blower.

You could use water injection to get more power and help keep the turbos cool.

You could also use the tesla turbine on the final turbo, to power an oil coolant/lubrication pump.

You could ditch the leaf blower this way.


This would take a lot of phase changes out of the equation which would increase efficiency.

If you reworked the final turbo to have a longer shaft, you could have it directly turning a larger blower.

One turbo might be enough, just take bleed air from the compressor before it goes to the combustion chamber.