I've added a sample parts list to my video description. I'll be posting some updated info on my new blog here: www.tinkletinker.com/blog/uncategorized/wood-fired-hot-tub/

@KrunchTastic

Жыл бұрын

Just a heads up for future builds. Not trying to be one of those people who know it all. Just a tip, when you're bending piping you should fill it with SAND First that way you won't get any creases in the piping. :D None the less, great video. Take care!

@bogamanz

Жыл бұрын

@@KrunchTastic I was aware of that tip when I bent the coil but was unsure how to pack it into the original coil. If I recall ice was also an option.

@KrunchTastic

Жыл бұрын

Very easy sir. Just add water to the mix and everything will come together, it helps compact and keep the kinks out. :D Great Build! Each rotation will compress the previous bend. Have a Great Memorial Weekend.

@pobedapatsfan

10 ай бұрын

......how long does it take to get hot in the winter?

Few Improvement: 1 Insulate the fire chamber.Close one like a drum barrel with ceramic blanket is better. 2 Bend the copper tubing in a sprial pyramid form and Use it in the MIDDLE of the fire not around it. That way it will be much more effective

I made one similar. I used a 55 gallon drum. The coils are a little tighter therefore closer to the fire. The bigger improvement I would recommend is using a fishtank pump to aid the thermal syphon. That helps us heat up our hot tub almost 10° per hour.

look at the beautiful family, good for you! nice project, thinking about replicating it.

Pretty simple and it looks efficient, 40 degrees is a lot for a tank of that size.

Love this!! I am in Tenerife so I will try this with garden hose in the sun only… solar power only

Great idea! I want to try this offgrid on my land

That baby loves the tub :)

If there is room Lava rocks on the bottom of your fire pit to improve thermal mass... and a few bricks would help... also do you have any foam under your tank? The ground will steal a lot of heat via conduction... Bless and thanks. I have one with a barrel stove in mind

@bogamanz

5 жыл бұрын

Those are both great ideas. Thanks!

@chrisw5742

4 жыл бұрын

@@bogamanz Use a closed cell foam. Also coat tank with Elastomeric first.

Fantastic ! Thanks for posting .

Really really nice build. Now if I could figure out how to do similar, but without a pump, with an unground pool.

@bogamanz

3 жыл бұрын

There are stoves that work submerged in a hot tub. That might work for you.

Hello, I love the idea and we want to do it in our house. But I have a question, how does water pass through fire? Does it use a pump or is it gravity? Thaks

To easy,thanks for the video man

I might do this. But I’ll insulate the outside with closed cell foam, put some sort of liner inside, bury it to make it about ground level and make a cover for it which should help with the heating. Also will run a pump and filter setup. Hopefully it comes out well. I’m thinking 🤔 if I should do it

@bogamanz

4 жыл бұрын

That would help, but dirt has a low r-value. This approach may be disappointing. If you don’t use a pump to drive the hot water, your heat source will need to be placed below the pool for siphoning to work. I would be afraid to run this setup if the water was forced through the coil, as failure would have some serious consequences.

@ernestoespinoza1260

4 жыл бұрын

bogamanz I was planning on making the fire pit in ground rocket style so the coils would not be above water level. They’d be parallel like yours

@ernestoespinoza1260

4 жыл бұрын

bogamanz I also used to spray foam insulation for a company. That stuff would be perfect to spray around the outside, maybe an inch at least before putting it in ground.

@bogamanz

4 жыл бұрын

Great idea. This should work well.

Suggestion Cover the tub The water will heat quicker 👍

@bogamanz

3 жыл бұрын

When we are not going to be in it, we certainly cover it! Good tip.

what a fantastic idea

I have a softtub brand hot tub. This brand uses the waste heat from the motor to heat the water. It is a clever idea, but it can take a long time in the winter to get the water hot enough for you to want to be in it, and the only time I like being in the hot tub is in the coldest of winter nights. I try and keep the water balanced from about October through about April. More often than not I will need a mid winter change. We have a 30 or 40 gallon hot water thank and the tub holds about 350 gallons. I have been pondering a copper loop in a fire for a long time now, and I think you have convinced me to do it. BRW how is that metal tank holding up with your choice of sanitizer?

@bogamanz

4 жыл бұрын

I only use this on demand and use simple bleach as a sanitizer. It is never full for more than a few days, so I can't really help with your question.

do you have solder joints in the fire? or is the coil just 1 length?

Wish this could work for my pool

I love it!! Question...the thermal heated water cycles on it's own and continues untill fire is out???? How did the first water go in the pipeline..

@bogamanz

5 жыл бұрын

The thermal action in the coil will cycle water on its own as long as there is heat. When the fire goes out, the action reverses as the coil becomes cooler than the tank, so I plug the coil to stop the flow once the fire is out. I connected hose fittings on the inside of the tank so I can hook my hose up to the coil and fill it directly while starting the fire. You wouldn't want to start a fire without water in the coil though. With a well designed system, the water will enter the coil as one fills the tub.

@NIGHTLAMP12345678

4 жыл бұрын

With thermo syphon the water feeds to the coil need to below the high water mark....ideally intake at the lowest point and out let just below the highest water point.....but in reality it will work as long as one pipe is higher than the other.... the trick is not to heat the water in the fire too much too quickly as it will boil...the way it works is hot water is lighter than cold so it naturally wants to rise in so doing allowing cooler water in behind it.....simple and effective....and no moving parts

Awesome!!

Ty

Gotta insulate the tub. Cover / sides/ maybe even bottom. probably would get to temp in a hr or less. Does it have to be a coil? Could it not just be a 2" pipe, U shaped sitting in fire sort of kicked horizontal. everyone uses a coil

Como. Haces qie el agua circule?

Ive watched a few DiY videos on this now and it seems like most are getting up to temp around 3 hours, which honestly...is a little long for anyone who doesnt have a ton of time in the day to relax. Any simple ways to halve this- adding a second coil maybe?

@bogamanz

3 жыл бұрын

You could reduce the volume of water you heat. A two person hot tub might contain half the water of my large tank. Insulation might help too for regular use. To use on demand, you might want a modern store bought tub that is always warm. Be realistic with a home-made solution. Just starting a wood fire takes time. This is more of a lazy weekend/holiday event for my family.

I need some detailed information about how you connected the tubing so that it can easily be removed from the tub. I have a cast iron tub I am working with and the coils will go inside a metal bucket ~ also where can I get already coiled copper tubing. I went to Home Depot and all they had was a straight 10' piece (I go the 3/4" thinking that the water would flow and heat faster)

@bogamanz

4 жыл бұрын

You might need to special order some hardware here. I used brass through hull fittings to connect to the tub. These have rubber gaskets to create a seal. You will likely need to coil the tube yourself for find a shop that can do it for you. The copper I bought came in a "coil", but it was 3-4 feet in diameter so I had to carefully bend it into a tighter coil. You could solder a bunch of those 10 foot pipes together. The water in the coil will keep the solder from melting under heat. Your questions indicate that you may be new to plumbing. Caution, water under heat/pressure inside pipes can cause deadly explosions. This project might not be best for a beginner.

@womenswellness1577

4 жыл бұрын

@@bogamanz you answered another question for me in that if the copper is already coiled would I be able to make it smaller, thank you ~ I am wondering how could I create an explosion if my set up is the same as you have here where the water circulates itself without any kind of pump attached? Also, I can't picture what you meant by soldering 10' tubes together . . that would be really long ~ thank you for sharing your thoughts ~ an explosion would get me kicked out of my living space so I really need to know what you meant by that ~ thanks!!

@bogamanz

4 жыл бұрын

@@womenswellness1577 If the water flows freely, the risk of explosion is low. If your system is obstructed, the pressure generated by the heat has to go somewhere. Under no circumstances should you plug either end of the system while heating. Research boiler explosions to get an idea on how catastrophic this force can be.

Can you share details about all the couplings and fittings?

@bogamanz

3 жыл бұрын

I've added a sample parts list to my video description. I'll be posting some updated info on my new blog here: www.tinkletinker.com/blog/uncategorized/wood-fired-hot-tub/

I have a question if you don’t mind. I built something similar but I’m having trouble getting a good flow. I get loud popping and just spurting water not a good flow. Did you ever have such an issue and if so how did you fix it? Thanks

@bogamanz

2 жыл бұрын

I do get sputters now and then. That is trapped water boiling, perhaps with explosive force. Steam power can move a train, so be careful here. Remember, boiler malfunctions were deadly back in the age of steam. I fix my minor issue by leveling the coil with a rock. You want to verify that at no point is the water forced downhill once it enters the heating coil. When my fire is super hot, the system will still sputter now and then. What is the smallest diameter opening in your system? I'd keep it over 3/4 inch, more is better (but I am no expert).

How do you circulate the water ?

Ok so I am on COVID quarantine. I am planning to build out a 25foot x 25foot paved stone patio, a 8x8ft above ground stock tank pool. Connect it to a 4ft firepit within the patio area. I live in Syracuse NY (Average 120 inches of snowfall per year). I want to use it year round. I have solar electricity for the house. My plan is to use what I have learned from fellow youtubers like you Bogamanz to get the whole thing all year round above 100 degrees. Any idea what size copper tubing / and how long i would need to burn firewood to heat a 800 gallon stock tank pool from lets say 40 degrees to 100 degrees in snowfall? Also anyone have ideas on how to build an insulated cover to get help get it hotter quickly, also what solar/electric options can I add on cheaply? I dont mind if need an electrician at the end to help. Trying to hide all tubing and pipes underground or behind rocks etc. Any ideas on insulation would be helpful. I saw someone use Glass bottles beneath the foundation to help with insulation. I plan to put fiberglass around the actual tank, with a pool liner and then brick facade to hide it all. no idea how much this will all cost but i think it beats the estimates for a standard swimming pool. BTW anyone know what size pool pump is best? 800 gallon pump for 800 gallon pool?

@bogamanz

4 жыл бұрын

I don’t have the calculations you need, but a 800 gallon tank holds over 2x the water as this setup. There are versions where a wood stove is submerged in the pool and heats water by direct contact. That might be a more practical approach for a tank that size. Good luck!

I witnessed the baby fighting a bear cub, she’s making her a bear robe

Cool

Pretty cool. (Hot) what about trying a propane instant hot water heater. Battery operated just need a small pump to provide pressure for flow and turn on heater.

@bogamanz

4 жыл бұрын

I actually did create this solution. Many of these heaters are not designed for continuous operation and have auto shutoffs. I can warm the pool, but not get it hot.

Did you have to solder the copper coil to the copper pipes?

@bogamanz

5 ай бұрын

This build did involve soldering.

how about a small 12 volt heat tolerant circulating pump, warm up time is quicker and you don't have to tip over or bail out the pool when you are done. i don't know about the availability of such a pump but it would be worth it.

@bogamanz

4 жыл бұрын

I'm not a thermal dynamics expert, but would the pump actually speed up heating (assuming the same hand-formed coil was used)? My flow is slower but hotter. Not sure if a faster, cooler flow would impact the overall time significantly. The beauty of this design is that it is relatively safe (the coil won't over-heat if I loose power), it required only simple tools like a wrench, a blowtorch and a drill to build, and it can be rolled anywhere on my yard. This thing drains quite easily thanks to a lower plug. I've used a simple mouth-primed siphon to drain it from an enclosed area as well.

@danielmiller5521

3 жыл бұрын

That's what I want to do. There's a few options on Amazon, try searching "hot water circulator". I'd imagine this would go in between the output from the tank and the heating element where the water's cooler. Just not sure if this is unsafe in any way, not much talk of it.

I have ran one just that way but it can be dangerous can make steam safer if the coil Is in water

@bogamanz

3 ай бұрын

Getting the coil to rise at each point is harder than it looks. If the coil dips down in some spot, you will have problems. It seems like many who tried to duplicate my video have not been successful.

@bogamanz

3 ай бұрын

One thought I just had after replying: my coil (in the video) is hard to do right since each layer of the coil sits on the previous layer. If people trying this today added a way of spacing each coil vertically (so that there is an inch or so between layers to create more "rise"), I think they would have fewer problems. Than again, I'm a non-exert, and should be ignored!

I wanna use it for a giant bubble bath

Lovely, but how do you circulate the water?

@bogamanz

3 жыл бұрын

The hot water circulates on its own thanks to the thermal siphon. We also keep a paddle on hand to stir the tub to a uniform temperature. There are no air jets or bubbles with a traditional hot tub.

Did you do any calculations for water flow / heating? I have access to 50 feet of 1/2" coil but not sure what that means for trying something similar.

@bogamanz

5 жыл бұрын

Folks on KZread that use 1/2 inch report really long heat times. Depends on how much water you heat of course. It might work better if you create some sort of stove or way of getting the pipe closer to the hot coals. The short hoses were a bad idea here, they restricted flow and melted on my 2nd try. I've replaced this with 3/4 pipe and the setup works much better. It can get so hot that I can't enter the tub. This is perfect for heating during the day and using at night long after I put out the fire.

stupid question... copper pipes don't melt in the heat? thanks and congratulations.

@bogamanz

3 жыл бұрын

If they were empty, you would have a problem! The constant flow of water cools the copper considerably (since the heat transfers to the cool water).

@dcan911

Жыл бұрын

Copper melting point is like 1000 degrees C. you're not gonna generate that sort of heat in a fire pit.

What is the coldest temp you have used this at? Water or air. Wondering if this would work on a late fall or spring day in MN

@bogamanz

4 жыл бұрын

Maybe 60 degrees. I think it would work lower than that, but haven't tried. You could always find a way to insulate the tank.

HI, I am working on a similar project. My tank is 300 gallons and your project is the only one on the internet that uses 1" copper. Can you comment with a full material list. I really like your choices for adapters and the hose filters. Well done.

@bogamanz

4 жыл бұрын

Not sure I still have the list still, but the rubber hoses shown here were a bad choice as the heat warped them. The setup today uses all metal connections.

That is a cute baby.

Thank you for the video. I have a question to ask before I build mine: Correct me if I am wrong: The bottom copper pipe feeds into the fire, the fire heats the water in the copper coil, then the hot water rises due to the heat and feeds the top copper pipe back into the tub? Am I correct on this? Subscribed and liked!

@bogamanz

4 жыл бұрын

Yes, you are creating a thermal siphon. Warm water rises and sucks in cold water. Good luck!

@THE-PROTECTOR

4 жыл бұрын

@@bogamanz Amazing! One last question: Let's say the desired temperature of 104 degrees is achieved. If I install a shut off valve will the copper pipes melt due to lack of movement? Did your copper pipe that sits in the fire degrade over time?

@bogamanz

4 жыл бұрын

Please do not install valves. This could cause an explosion. This video is for entertainment use only and should not be replicated by anyone.

How many hours you wait?

What’s for dinner mom? Me? 💩

U can also do the same with a camp stove

@bogamanz

2 жыл бұрын

Can you grill a steak on a camp stove though?

@losttribe1993

2 жыл бұрын

@@bogamanz si:) (thin steak ) and i cook my homemade tortilla on it too some onions and seranos

@losttribe1993

2 жыл бұрын

@@bogamanz i have the same fire pit ! And i love making corn and t bones :)

❤❤❤

How did you manage such a smooth flow? My water seems to boil in the pipe and then sputters out of the higher flow back into the tub. Any ideas?

@bogamanz

3 жыл бұрын

Does your setup have a steady rise at each point once the water is heated? The water wants to rise. Are your pipes too narrow? My setup does sputter every now and then when using extreme heat, but not constantly.

@Thousand.cranes.bonsai

3 жыл бұрын

bogamanz im experiencing this same problem. What do you mean 'a steady rise' ??

@bogamanz

3 жыл бұрын

@@Thousand.cranes.bonsai 1st, locate the heat source well below the pool. Use a hill if possible. You want to heated return pipe to rise significantly. 2. Once the water starts to get heated (starting at the bottom of the coil), every inch of your pipe should be higher than the last inch. If not, heated water can get trapped as it tries to go up in the wrong direction. If trapped, it will turn to steam.

Que tiempo tarda en calentar el agua

@bogamanz

3 жыл бұрын

aproximadamente 3 - 4 horas.

What do you do if the temperature starts to get too hot

@bogamanz

Жыл бұрын

It's gradual enough that I simply stop adding as much wood at some point.

How do clean it? Filter it? Do you have to shock it?

@eliasbrunka5348

3 жыл бұрын

drain after your done and refill when you want to go in

Can you maybe post a link for the connectors?

@bogamanz

3 жыл бұрын

Try this: www.amazon.com/RAINPAL-BBF020-Bulkhead-Fitting-Threaded/dp/B01C9A386Q

Can you put chlorine or hot tub chemicals in a galvanized stock tank like that?

@bogamanz

4 жыл бұрын

I have not had a problem, but the tub is empty most of the time. I only use a little bleach.

@itsadoggydogworld8974

15 күн бұрын

Where I live water is plentiful. Even if not, salt is better

How do you turn off the heat if it’s getting too warm. I have a stock tank tub but it’s much smaller so it doesn’t need as much heat. Also, for anyone not wanting to wait as long to heat up you can fill it initially using propane hot water heater or install a fitting on your indoor tap with a long hose and fill it that way with hot water from the house.

@weneedmerch

Жыл бұрын

add more water

@jbrannon509

Жыл бұрын

I'd use a small swimming pool pump like you get with those cheap inflatable Walmart pools or any little 110 volt water transfer pump. I'd put the pump on the line from tje tank to the woodstove so it has cooler water running through rather than being on the hot water side. Then you can just put a ball valve on the upper hot water return so you can just reach over and adjust the flow of hot water coming in. Also, I've wondered about using small pump like I mentioned but wire it with a dimmer switch so you could vary the pump motor RPM to turn the flow down.

@craigfishcake2543

Жыл бұрын

@@weneedmerch To the fire.

Anyone know what a "stock tank" is called in Australia? I can't find them anywhere, only poly tanks.

@aaaaaaaaaa9837

4 жыл бұрын

it's funny because in Brazil we call them australian water tanks

@ubeautynz7395

4 жыл бұрын

In New Zealand it would be know as a water/stock trough. You could make enquires through livestock companies like Elders, Wrightson, Wesfarmers etc.

@marzsit9833

4 жыл бұрын

in america, a "stock tank" is a vessel intended to hold water for livestock to drink water from. it would be expensive to ship a galvanized steel stock tank to australia so that is why you are having trouble finding one and the only ones you can find are made of plastic.

Everyone’s saying that this tank looses a lot of heat. Is it hard to keep it warm?

@bogamanz

15 күн бұрын

I don’t use it in the winter or cold weather and have lots of wood, so that hasn’t been a problem. I’d caution that few have been successful at bending a working coil like I did.

@SaintJames40

15 күн бұрын

@@bogamanz oh I didn’t know you made them yourself. I see some expensive ones and then cheaper ones. I was wondering what was the best option.

@bogamanz

15 күн бұрын

@@SaintJames40 I haven't priced these out, but the larger diameter the coil, the better. The stoves that sit the tub would be the fastest way to heat a tank--but take up space and I wouldn't use these around kids: www.alekoproducts.com/internal-wood-burning-hot-tub-heater-equivalent-to-10-15kw-electronic-heater/kitstovecmy2-ap/?srsltid=AfmBOoqWkK8Frgq-AEK3d1s8s5C0MYa3yLyDQ7Oic33Rid_Kg9O1WqQP9TM

@SaintJames40

11 күн бұрын

No pool pump at all? Everyone’s saying I should do one but I really don’t want to drill into the side. Just trying to figure out my best option. I have a 300 gallon poly tank. Was wondering if one of those waterfalls that clip onto the side would be enough?

@bogamanz

11 күн бұрын

@@SaintJames40 A proper thermal siphon moves the water through the heat on its own. All you need is a paddle to circulate the water in the tank once every now and then.

You didn't use a pump?

Do you have a recirculating pump on it

@bogamanz

3 жыл бұрын

Now I have a pump and filter. Here is the latest version: kzread.info/dash/bejne/c4th17KYorjcg5M.html

Do you know if I can find this stock tank in France? ??

@bogamanz

3 жыл бұрын

I don’t. Is there a store in the countryside that sells goods to farmers? I’d look there first.

How long was your copper tubing

@bogamanz

3 жыл бұрын

Here is the exact product: Coil, Type L, Pipe Size (In.) 1, Length 60 ft., Material of Construction Copper, Inside Dia. (In.) 1.000, Outside Dia. 1-1/8 In., Wall Thickness (In.) 0.050, Max. Pressure (PSI) 494, Temp. Range (F) 100 to 400, Standards ASTM B88,B306,B280, & B819, Compliance Certified For Use In Potable Water Applications, Package Quantity 1

How do you regulate the heat?

Use a old washer drum stainless.

Building a Dakota fire hole type burner under the tank would be immensely more efficient

@bogamanz

4 жыл бұрын

You can tell my wife that we are digging a gopher hole in the yard. I'll hold your beer.

The baby built the whole system for his parents. The baby also hunt rabbits and then cook them on fire . this baby once told a chicken to lay 6 eggs a day. And the chicken obyed

does the water turn green after awhile

@bogamanz

2 жыл бұрын

I've added an intex pool filter and a clorine dispenser. These additions keep the water clean.

Has anyone tried to put the fire pit under the tank ? Could put it on 3 sections of a concrete slab. The middle slab and fire pit on a role out on wheels system. Roll the fire pit underneath, then when the water temp is hot enough, roll it back out and roll the middle concrete slab back underneath for stability. A roller system like the roll out garbage can underneath your sink. Might take some time to workout the design but I think it could be done. Let me know if anyone takes up this design challenge and what the results are. A lot of us are stuck at home now so this challenge could be a fun project !!!

@bogamanz

3 жыл бұрын

Some advise: concrete may not hold up to these high temps. My understanding is that you should never build a fire directly on it. Why not just dig a pit in the earth and place a steel sheet under the tank and over the pit? If the underground pit was small, you might not even need the support. 300 gallons of water weighs a lot more than you and friends, so the rolling support function might not add much value. Good luck!

@eliasbrunka5348

3 жыл бұрын

I started a fire on ground then put hot tub tank on four concrete blocks around fire and got a shop vac connected to a tube and that got it SUPER hot within an hour. spray fire down if too hot or add log and put shop vac back on if too cold

How does the water circulate ????

@bogamanz

3 жыл бұрын

The thermal siphon action takes care of circulation in the coil (warm water rises). To keep the pool the same temperature, I stir the water with a paddle.

how'd can one buy tub like that? have website that can ship?

@bogamanz

3 жыл бұрын

I hear there is a shortage on these with the virus (folks are using them as pools), but Tractor Supply is a good bet. I had to make a special frame on my truck to carry this home.

Where did you buy your stock tank from?

@bogamanz

5 жыл бұрын

A chain called Tractor Supply. Any farm supply store will have these.

@joshbeekman5474

5 жыл бұрын

Rural King, Tractor Supply, you can even order one at Lowe's. I would hook up a pool pump to it too with multiple inlets

I tried this and mine sounds like a percolator making poping sounds with air bubbles and just keeps spitting out air with some water from the top

@bogamanz

6 ай бұрын

I've commented this before, but make sure the coil is continuously rising. The water must not be forced downward at any point.

Can you tell me the depth of that tub please? Is it 2ft?

@bogamanz

3 жыл бұрын

Yes, this one is 2 feet.

@stevejohn01

3 жыл бұрын

@@bogamanz thank you for the speedy reply. So do you find that 2ft is enough depth for you to be fully submerged if you want too? I'm definitely going to make one of these, I just have to source a tub in the UK.

@bogamanz

3 жыл бұрын

@@stevejohn01 Since this tub is 6 feet round, yes. You can simply lie down. My wife and I are tall people and we fit nicely. In this follow up video, you can see me up to my chin: kzread.info/dash/bejne/c4th17KYorjcg5M.html

Have the garden hoses melted at all?

@bogamanz

5 жыл бұрын

Yes, the short hoses were a bad idea. They restricted flow and melted on my 2nd try. I've replaced this with 3/4 pipe (metal to metal connection) and the setup works much better. It can get so hot that I can't enter the tub. This is perfect for heating during the day and using at night long after I put out the fire.

@tigresa198521

5 жыл бұрын

bogamanz “metal to metal” what do you mean by that. I’m planing on buying a 25feet 3/4 cooper pipe and attempt to do this. Will that work?

Sorry to sound like a dummy, but how does this water cycle work?

@bogamanz

5 жыл бұрын

Some nerd will explain it better later I'm sure, but same principal as a hot air balloon. Warm things rise. The rising warm water draws in the cool water, with the process ejecting hot water into the big tank through the top pipe. Notice how the two connections to the tank are at different heights.

@hillbobaggins

5 жыл бұрын

Ya, the water is boiling inside the coil causing rising pressure which escapes out the top pipe as it's pulling in new water from the bottom. It's a heat operated syphon

@bogamanz

5 жыл бұрын

@@hillbobaggins The siphon effect doesn't require the water to boil, only to heat up and rise in the coil.

@chrisw5742

4 жыл бұрын

Convection ... en.wikipedia.org/wiki/Convection ... "Natural convection, or free convection, occurs due to temperature differences which affect the density, and thus relative buoyancy, of the fluid. Heavier (denser) components will fall, while lighter (less dense) components rise, leading to bulk fluid movement. Natural convection can only occur, therefore, in a gravitational field. A common example of natural convection is the rise of smoke from a fire. It can be seen in a pot of boiling water in which the hot and less-dense water on the bottom layer moves upwards in plumes, and the cool and more dense water near the top of the pot likewise sinks. Natural convection will be more likely and more rapid with a greater variation in density between the two fluids, a larger acceleration due to gravity that drives the convection or a larger distance through the convecting medium. Natural convection will be less likely and less rapid with more rapid diffusion (thereby diffusing away the thermal gradient that is causing the convection) or a more viscous (sticky) fluid. The onset of natural convection can be determined by the Rayleigh number (Ra). Note that differences in buoyancy within a fluid can arise for reasons other than temperature variations, in which case the fluid motion is called gravitational convection (see below). However, all types of buoyant convection, including natural convection, do not occur in microgravity environments. All require the presence of an environment which experiences g-force (proper acceleration)."

@chrisw5742

4 жыл бұрын

They mention "microgravity" but that is BS. Gravity itself is BS. It is buoyancy and density that makes things go up or down.

Did u have to siphon??

How the hell did you hand coil that copper tubing??

@jbrannon509

Жыл бұрын

He probably wrapped it around something round he had.

So you light the fire on Monday & the hot tub is ready on Tuesday 😁😁

@bogamanz

3 жыл бұрын

Nothing much better to do these days...

@officialmysteriousrider6327

3 жыл бұрын

@@bogamanz true

Do you add chemicals?????

@bogamanz

2 жыл бұрын

Early on I used bleach, now I use one inch chlorine tablets in a floating dispenser. This tub is going on 3 years now and has been holding up well.

How does the water climb uphill into the tub?

@CBUCK1994

4 жыл бұрын

Dan de Angeli pressure

Make it a rocket stove instead? much more effective.

@bogamanz

5 жыл бұрын

That would be one big rocket stove to deal with the larger diameter copper coil (I expect one would need) to heat a tub this size in a reasonable time using thermal siphoning. I have piles of firewood on my land, so this solution works great for me.

@henrikkarl25

5 жыл бұрын

bogamanz rocket stoves produces what, like 10 times more heat then non rocket stoves for the same amount food? And it's a faster process. Just saying brother !

How do you keep the water filtered ?

@bogamanz

5 жыл бұрын

I disinfect with bleach, but only use the tub for a day or two before draining. Water is plentiful and cheap where I live.

If you had of made a hole under the pool you wouldn’t of needed a fraction of wood to heat it 😁 and a Lot quicker

@bogamanz

4 жыл бұрын

You can tell my wife we are digging a giant hole in the yard. Hopefully we don't hit the septic system. Also, where would I cook my steak? A hole is not a bad idea, but this setup has worked really well for us. This solution has the benefit of moving the smoke further away from the swimmers.

Will not work without a pump

@bogamanz

2 жыл бұрын

It is going on 3 years of working without a pump. The video shows it working.

no way to regulate heat? Hmm.

@bogamanz

3 жыл бұрын

It's not that hard. You add more wood to increase heat. You let the fire die down to lower heat. You throw a bucket of water on the fire to turn it off.

Fired up water in a metal tub somehow seems like a bad idea.