Test number two

[xXnakochoXx]

wats the porpuse of all this???

[stangstangsstang]

Neat idea. I still think that it's more efficient to simply heat the pan itself.  But keep trying new things and improving your design. This type of thing is what makes a lot on new products. If nothing else it's rewrding to design something that works yourself.

[phillipdogyface]

wow! good job dude i once made something like this but it was fust a shoe polishing kit for the boiler and it powered a mini toy car! the way you did it makes me look like an ameture lol hope you get it right soon! good luck! ;)

[SSouthcombe]

For those criticizing his idea go back to school.....

What you fail to understand is that his method here compounds the available heat thereby heating the water faster.

Yes, you could heat it in the kettle. But with his coil in a containment device he can heat the water faster with less of a heat source.

Physics 102.....for those who didn't pass 101 I understand.

[Coolsization]

Question: If you are using an open flame already, why not just put the water in whatever receptical you are using and put it over the flame? Honestly all you're doing is adding a completely unnecessary and overly complicated step. You still need to stop, get a flame and heat the water. Why not just put the kettle on the flame? Or, if you are looking for a product, make a cup that sits in place of your make shift heating coil. Am I the only one thinking these things?

[minibulldesign]

If you don't try different thing you don't discover anything new. You are correct but it doesn't hurt to experiment. That is how I discovered every thing else I sell

[phillipdogyface]

well i dont know very much about that boiler thing your making but its still pretty cool! :D

[toocka45]

What both of you guys say is true and both have a point to it. I say, why re-invent the wheel?

[phillipdogyface]

its not like you can put a pot over it in your backpack! didnt you here him? he said he was making an on command water heater FOR YOUR BACKPACK! i mean how hard is it to listen? for you pretty hard... -_-

[KMAMK123]

make a gold coil

[phillipdogyface]

gold will snap under to much heat dude... you might not want boiling water burst in your backpack do you?...

[DoctorDahl]

If you already have a kettle and an alcohol stove... Then what's the point of making a fancy system?

Why not just pour water into the kettle, and use the stove to heat it?

[phillipdogyface]

hes making a portable on cammand boiler for your backpack! i mean god! how hard is it to listen?

[Weisenheimer78]

Oh my goodness! You sound just like Kipper the Dog, the children's animated series!

[phillipdogyface]

uh no one cares...

[andrei792001]

A counter-current type heat exchanger works better than a uniflow-type one from the point of view of the final temperature of the secondary agent, so the hot tube at the bottom of the coil is the best way to go.

I would try covering the top of the boiler so the hot gases stay longer near the coil and transfer more heat to it

That open top is just a waste of heat, it shoots up past the coil.

You have more than 200 C of heat in that flame, so contain it and use it.

This is just my opinion.

[phillipdogyface]

but its going in (or on the outside... i guess...) of his backpack so if the thing were to be covered the presure and heat mite make it pop or something... but good idea by the way! ;D

[dietolivefree]

lol toooo funnnny

[phillipdogyface]

uh how is ones ingeunius (i know i cant spell) idea be so funny??? man the nerve of some people these days... -_-

[hellboy1488]

make sure in your final desing to use copper tube for your coil copper will never build bacteria because of water

[Thoendith]

Copper is poisonous...

[minibulldesign]

Now this is a good chance to point out that the hot water to my kitchen faucet runs thru copper as well as the heating coil that heats it. And this is all certified good by underwriter laboratory. ALL water heating systems run with copper in some place. So how can it be poison????????

[phillipdogyface]

it is? wierd i made someting like dis before like in my reply ubove and i didnt get sick from the thing... but i dont think copper is very healthy...

[phillipdogyface]

well.. i dont know for sure but i might have tried something like this with this once with my dad when i was 4... i cant remember for sure but i think it didnt work how we planed lol... : \

[sswwooppee]

Why not skip all the flow rate stuff and just have enough coil to hold 2 cups of water. That way you have the greater surface area for better heating efficiency, but none of the fiddly parts.

This experiment is really, really cool.

[Wharfrat992]

Tinny, you need to use two separate coils connected in a closed loop. keep the coil in your burner just as you have it. place the second coil in your pot submerged in a volume of water. As the water inside the coil on the burner side heats to steams it will travel to the submerged coil in your pot, there it will condense and convect heat depending on the surface area of the second coil it will boil the water in the pot condense and travel back to the burner coil to repeat the cycle.

[jimrbsn]

Tinny,

This is really a really cool experiment ! I have a suggestion to increase the flow and efficiency.... Swiitch the intake and output on the coil ... have the cold water enter at the bottom and the hot water exit at the top... Maybe you'll get some better preasure with convection helping a little.

Have a good one Tinny!

[MrCableguyken]

Keep in mind...water heaters do just that...they heat water, usually to not much than 125...its not meant to boil it. to get a boil, you need more coils....getting smaller as it goes to increase pressure. and more heat...Im not being smart, or beating the idea down, but I think its a dead end venture. to get the wter to boil will cause it to steam in the tube first.

[minibulldesign]

I only need it to go to 200 ---I think that is doable?

[MrCableguyken]

I beleave you can reach 200...just use reducers, and go down in size as you go with the tubing..and use the thinnest walled tubing you can find. you may be able to find air line tubing in sizes as small as 1/8 inch...or brake lines and fuel lines from automotive stores..they sell them in 4 foot lengths. sand in them makes them bend in a more round pattern. and a double wick stove may work better...flame on the inside and outside of the coils...you want flames to the top of the coils.

[MrCableguyken]

sure, but use a taller flame, and coil...maybe a double wick...and put a lid on the coil housing..to contain the heat. let it heat the coils before water flow starts. It will boil and steam some..but maintain more heat using less full. I had an OLD steam pressure cleaner for motors and driveways..it was 5 coils inside each other...with 2 flames..one inside, and one on the outside surrounding the coils.

[kporter85db]

Tinny, it looks like you're loosing a lot of heat at the top of the "pot" Maybe you should try putting a lid on the pot to hold in the heat.

[kporter85db]

I talking about the container the coil is in.

[Aqualiteking]

If you want to make a better coil use a thin copper tubing, wrap it around some quite thing like a clue stick. Then take off the wrapped coil put inside a contianer and wrap the remaining piping around that container.

[MrCableguyken]

and if you fill the tubin with sand, it will be easier to coil...and you can just blow it out later.

[epicstove]

A couple of years ago, I tried something similar. In an attempt to increase boiling efficiency, I put a copper coil under a Heineken pot and built a percolator that circulated the water in a closed circuit.

[cementbrains]

TINNY

If you run the water in the bottom and out the top it will be much hotter and it will rise to the top by itself without much pressure behind it at all Thats how i heat my homebuilt hot tub the exact opposite of what you have

[hackerpoo]

try using a copper coil, they are harder to get a good coil but it should help make it more efficient

[StoneBoneAndFire]

I'm glad your looking into this people may not use it on the trail but there are plenty of people around the world that would put this thing to good use

[StoneBoneAndFire]

Looking good. How about a thinner tube size in the coil with more coils so the water is a lot thinner ( am I making sense) also can u find a pump pressure spray thing like used in garden chemical weeders or old parafin heaters I'm sure u can small ones would help with the pressure

[knifeguyeddy]

5/5m8

[marthale7]

I suggest insulation.... Don't let that heat get away...

[hrmarinkovic]

better quality video :D

[minibulldesign]

Better quality? Content--resolution---subject matter? Or are you saying this is a better quality video?

[jreineke2]

from boiler water heater design you have two main types water tube and fire tube. this is a water tube design what do you think of doing a fire tube design. it will allow you to keep it all in a small container. and if you make steam it will only boil like a regular pot would and not potentially stray you with super hot watter? just thinking out loud.

[SSanf]

No ads?

[minibulldesign]

Soon

[swdrumm]

Nice video and an interesting project. Thanks for sharing and keep tinkering!

That being said...What's the intended application? You' stoves don't have the horsepower for any type of bathing application, and from a cooking standpoint, the most efficient heat transfer option is to boil the water in the pot the old fashioned way.

With the flow rate you've got, the water in your cup will cool off significantly by the time a full 8oz has passed through the heat exchanger coil.

[minibulldesign]

The intent is to explore every possible way of getting the heat from the flame into the water. Trial and error. I have exhausted the pot design aspect. But I may mount this under a pot so after the flames pass over the coil they will still heat the pot base.

[canamm]

I added more coil to my heater in a way that the heat from the burner had to pass through the coil rather that pass by it. Try a cone shaped coil in your stove. I get way less heat out of the top of the stove and a lot more hot water.

[BespokeGroupUK]

Its great seeing you going through the design process.

[ironlionkalo]

hey tinny, ive been thinking about buying one of your stove for use on the appilacian trail but im not sure which one to buy. it would be awesome if you could do one vid with all the different stove you make explaining the pros and cons of each so i could better choose a stove. great video, thanks alot. cant wait to see how that instant water heater works out!

[minibulldesign]

This is too big a subject to try and put in a video. If you tell me what you cook--how you cook it ---and what pot you use. I can narrow down the selection.

[hrmarinkovic]

all of those :D I don't know if its just youtube but its much better video quality. Also it is good idea what you are doing :D keep on doing it

[minibulldesign]

COOL

[cybertiberium]

what you can do instead of specifics like which stove does this the best just make a video of pot specifications. like explain the boil time of 1 cup of water, 2 cups of water, the stove weight, dimensions, compatibility if any. explain what the stove can do. i dunno just an idea. make an ad basically.

[ubergnar2808]

i would try copper coil

[leetshots]

problem with copper is while it conducts heat very well it weighs a frigging tonne. relatively anyway

[hongkongzorro]

with the position of the coil, you are working against yourself.

the cold water should come in at the bottom, the flame should heat the top 2/3rd of the coil (copper maybe for better heat transfer). this should create a thermosyphon effect and as the hot water goes up it should suck the cool water in. the top of the coil should extend and be a bent down spigot, you are probably loosing heat in the hose to the kettle. Good luck tinny!

[cybertiberium]

its better if the cold is on top. email me if you wonder why. i cant explain in this short blurb.

[cybertiberium]

the setup i saw there is what i had in mind. you need a hotter stove. like you said before the bongo is a low temperature stove (in the boil time comparison test video)

[hoosherdaddy]

no thoughts of using copper tubing?

[plundra]

Fun project, do you know if there are any similar commercial ones out there?

[cdltpx]

Why not design it to where the supply source is above the flame so the btu are heating the source bottle too.