heat exchange for the Chinese diesel heater. exhaust heat recovery

[@LexsBudgetBunkerBuild]

I love the idea of sucking out a bit more heat energy from the exhaust that would otherwise be wasted - nice job indeed!

[@smithbuilt]

Will build an aluminium one next time to transfer the heat faster. thanks for watching

[@RRrrRRrrlandfin]

Thanks for the vid. That seem like propper way of doing it. Simple, efective and long lasting

[@smithbuilt]

Simple, effective.... sounds like me lol

[@coplandjason]

Good idea that, I think I’ll be making one as well

[@smithbuilt]

Cool, try and add some baffles an let me know if it works better. I'm thinking on adding one of the self powered stove fans to it.

[@19pointbuck]

I like it. I haven tried my idea yet and I’m not a KZbinr. However I will try and quickly try to explain my idea. I have a spare heater that I have used for parts so I would like to take the internal fan blade off the motor and than pump the exhaust in to the inlet port. Than run the exhaust port out side. Than hook just the motor to 12 volts. The hot exhaust will heat the heat exchanger and the fan will blow hot air out, just like the other heater. Might want to but a rheostat on the motor to control the speed. What do you think.

[@smithbuilt]

Sounds ideal, I guess if you could make a fined/heat sink aluminium tube then enclose that into another tube and blow the air through it would help with the heat transfer rate where its aluminium

[@julias-shed]

Interesting idea might steal it 😀

[@smithbuilt]

You're welcome to steal it but you got to turn it off first. I have no finger prints at the moment because I thought using them to test for heat was a good idea lol 🙃

[@julias-shed]

@@smithbuilt LOL it's too big for my tiny workshop. 🤣

[@examplerkey]

That's ok if you need a lot of heat. You could also use it to heat water, that requires a little more thinking. The exhaust heat ranges from 0.1-0.7kW depending on the heat setting. If you can make use of all the heat output from the heater and exhaust heat, it can effectively heat a bath full of water 180L from 10-40°C in just under 2 and a half hour. Free hot bath everyday! 🛀 🔥

[@smithbuilt]

I might get round to making a water heater at some point but for now it works for the job at hand. Not sure on a bath in my shed but warm water at a sink in there might be nice

[@examplerkey]

If you run the exhaust straight or L shape into a 100 liter bucket or barrel of water it should nicely heat up during the day while you work. I use the online tool omni water heating calculator. You need to get it right around the ballpark otherwise the water will be heated too soon while you're enjoying the heat or it won't heat up to desired temp during the time you hope it would.@@smithbuilt

[@gwagenadventure727]

Add a baffled path for air and fill the rest with sand. Sand will absorb heat over time and release it like a battery after the heater is turned off.

[@smithbuilt]

I want to run it 24 7 so there shouldn't be any down time

[@ollieprice4788]

Awesome job that! Would it work if you made a second 1 mounted it in front with a small gap between the two and plumbed it In it would act like a convection heater pulling the cold air from the bottom between both panels and forcing it up.

[@smithbuilt]

I'm considering doing something like that with some sheet aluminium to help pull the heat out or adding a self powered stove fan . Not sure just yet but I'll be adding to it as there is more potential to be had here

[@ollieprice4788]

I suppose the aim is to get the stainless rad as cool as possible whilst keeping the exhaust at the same temp or less… that will prove you have been effective at taking the heat and putting it into the air 👍

[@jeffclark5024]

Nicely done! I’m working on routing my exhaust into a 100 pound propane tank. It’s just mild steel so I shall see how long it lasts. First I just want to see how well it works. I increased my outlet size to 2” just to make sure I’m not adding any increased back pressure. May have a big fan pointed at the tank as well to help pull more heat out of it before going outside.

[@Ruffest]

Not a bad little vid bud. New sub here 👍

[@smithbuilt]

Thanks, still trying to improve my editing so it's very much appreciated

[@yodab.at1746]

Being that the chamber gets so hot, is condensation actually going to build up?

[@smithbuilt]

Burning fuels always produce moisture so image there will be some.

[@torchyboyz]

Hi Shane, I always check out your vids as you are so creative. Couldn`t you have just used an old central heating radiator with suitably adapted inlet and outlet. Best wishes, Paul from widnes.

[@smithbuilt]

To be honest that was my initial idea and I think based on it's design an old radiator might convect the heat better but, my dad took his old boiler apart and to my shock the amount of corrosion inside the steam release vent thing and the end of any screws exposed to the exhaust made me think to use stainless steel. Our plummer guy said that all the tubes and parts that come into contact with the corrosive vapours are now made from a plastic to withstand it.... I can't fabricat with plastic..... yet! Lol