What sort of temp rise do you get end to end with the water flowing through the outer shell at typical "shower float rates" (2-3 GPM)?

How do you use this and how much heat is it going to supply into what?

Wonder if this could bel used on the clothes washer, dish washer as well as the shower.

The mj rubbers seal the pvc well ?

how long is those 2 end rubber tubes and the copper

what kind of liquid can be allowed to flow there? I felt given the tight space, clogging will happen very quickly in this heat exchanger.

I just got some ideas on building a wort chiller by integrating your design. In case you don't know what wort is, it is basically beer that has just been cooked. It needs to be cooled quickly, so the yeast can be pitched at room temp. The longer it takes for the wort to cool, the more chances for airborne bacteria and yeasts to enter the unfermented beer. So, people use either a simple copper coil in their brew kettle and just run cold water through it, or a more expensive bar and plate heat exchanger. I like this idea. I can pump the beer through the copper portion of the exchanger and then either hook a water hose up the other section, or use a closed system with a radiator. I have most of the parts already, including a radiator. Well, I take that back. I need a food grade pump for the beer, unless I decide to gravity feed it slowly into the exchanger. I have a pump for the other side.

Good video,could this application be used in boats ?To cool down the liquid that flows through the engine that is primarily cooled from the sea ?As I understood,the salt water would go through this plastic,antifreeze will go trough this copper pipe.will it need another water pump ?Thanks.

Do this method work with a room ( 9 feet by 8 feet)?

What do you use to heat the internal, copper pipe so the water flowing around it gets warm enough to heat the pool?

Hi Rob Good job on the counterflow temperature exchanger just like the moonshiners do. Gday from OZ Regards from another plumber be safe out there theses can get dangerous when the flows aren't correct and pressures build up

Thanks for putting this video. I watched it and want to make one. I wonder where I can get the required copper pipe size and MJ couplings? I checked Homedepot, Lowes and ACE hardware and neither of them has the copper size or couplings?

@RobThePlumber

9 жыл бұрын

MrAmoslemi Yea they can be tough to find. But, you can easily find the coupling online. I am really surprised that Lowes does not.

@MrGlorybe

7 жыл бұрын

The big box home stores have been getting away from copper products due to price and convenience of use of alternatives. In the past I have hooked up dishwashers and incoming lines for sinks and toilets with copper. These days people just do not do that. The products offered at the stores reflects that. Galvanized pipe is also way too pricey now. Much of this is reflected in the wicked price of new homes.

This looks very appealing, but how does it handle hairs and other particles that end up in the drain along shower water? This has a lot more edges and corners than a regular drain pipe, so how easily would it get clogged up? And how difficult would it be to get flowing again?

Hi Rob. Thanks for posting. Have you installed this system and if you have could you post pictures? Thanks again!

Great video. It's this first one I have seen that mentions 'countercurrent heat exchange system'. People do not know what a differents it makes just to make sure which way the flow is going. Can you list the parts, especially the rubber part?

@RobThePlumber

10 жыл бұрын

plumboogle.com/plumboogle-plumbing/how-to-make-a-hybrid-heat-exchanger the full list can be found here along with some other specs. Thanks for watching.RTP

I wonder if i could use this wity a heat pump

Ok so I’m looking into this and the concept is great but I do know sch 40 pvc pipe is NOT rated for ANY heat. I think a improvement to this would be to use CPVC sch 80 pipe which is rated for heat higher than 240 degrees which would be plenty for this. Sch 40 pvc gets soft when introduced to heat and over time makes it brittle and could burst. Also the rubber couplings are actually called Fernco couplings, or mission band couplings. A MJ (mechanical joint) coupling is what you use when you are connecting a fitting to ductile iron pipe and you have 4 Bolts that are on each corner of the fitting and it has a rubber that tightens to the pipe as you tighten the bolts. Not trying to be a smart ass or anything but if someone is going to order these parts they need to be searching for the correct parts.

@artregeous

5 жыл бұрын

awesome if I get some homedepot slant fin hydronic baseboads is this exchanger works for some efficiency

Is such a plastic heat exchanger. Can be used for cooling with lighter gas as cooling medium? At minus temperatures of -10 or -20 Celsius? Or Ethyl alcohol boiling at very low pressure? Such a plastic tube will not break or melt chemically with alcohol or butane?

Please emphasize on copper pipe type. I used the 1-1/2" copper pipe type M but noticed that the 1-1/2" side of MJ coupling is too big for it since it's designed for PVC pipe of the same size (The copper pipe OD is different from PVC pipe OD). I don't know if there is a copper pipe with the same OD of PVC pipe but now I want to thicken the OD with some tape!

@RobThePlumber

9 жыл бұрын

MrAmoslemi You just need to purchase the right MJ clamp. You need to buy a 1-1/2 MJ x Copper coupling.

were is part 2 rob mate? and just to clarify, its the waste water flowing through the centre pipe and the mains supply water in the external pipe?

@RobThePlumber

8 жыл бұрын

Yes it is the waste water flowing through the middle pipe. Never made part 2. working on revamping the channel. there will be a part 2 then.

Thanks for the upload! Quick question; I want to build a heat exchanger for my solar water heater, and I was just wondering about the pro's/con's to decreasing the 1-1/2" copper exchanger to 1" for example, for more capacity between the exchanger and the pvc?

@RobThePlumber

10 жыл бұрын

When you reduce the size of the copper pipe, you are reducing the amount of surface area for heat transfer. You may need to make the exchanger longer or bank a couple of them together. I should have a video on banking within a couple of weeks. I am also making a video on slowing down the fluids and using fins to increase heat transfer. Thanks for watching! RTP

@JamesBiggar

10 жыл бұрын

Rob The Plumber I see. I like the bank idea. Looking forward to the next video. Thanks for the quick response! Cheers

@simonkolff4348

9 жыл бұрын

Rob The Plumber Great videos Rob! Thanks for sharing and making it possible for us DIY's to make small changes that potentially can make a big difference when it is open source :-) Is there a video on slowing down fluids? Does it make any difference on heat efficiency (with slowing inside PVC pipe) if the hot water is pumped inside the copper tube instead of in the PVC pipe? Good point about better insulation in outer PVC pipe. Copper pipe in copper pipe doesn't make much sense with the heat loss to the outside...

@kylehobie16

4 жыл бұрын

@@RobThePlumber You may want to check this. Smaller copper pipe will increase the surface area per volume inside copper. Super cool idea (pun intended). I may try this for my boat project. Thanks for the inspiration!

Hey Rob, really appreciate you generosity. Any thoughts or experience on max safe operating pressures/temps with this simple design? I'm thinking of using it for a concentrated solar water heater which may see >80 °C and several bar. Don't want to hurt myself, or anyone else! Thanks.

@RobThePlumber

9 жыл бұрын

***** Go and check my all copper design, i would go with that. with 80°C, I would not use any plastic. Thanks for watching.

It is more efficient when you use smaller tubes and make dents in them to create turbulence. The same for the outer tube. Also make sure your Re is above 4000 and temp of the liquid not higher than 94 celcius

How do you get a hairball outa that?

very simple,too good

Hey Rob, great video. i am thinking of using this for a couple of showers in the house. Should I be concerned about the rubber couplings and city water pressure over a long period of time? Also the heat exchanger would be installed between joists behind drywall, any condensation concerns?Thanks

@RobThePlumber

9 жыл бұрын

Andy Morel I have had a similar exchanger in use for over two years now. No issues to report. As long as you build it exactly as shown there will be no issues. Shower drain size is 1-1/2" min. Keep it that way. Thanks for watching.

@tylerlowden8023

7 жыл бұрын

MJ couplings are not rated for pressure applications. they are gravity drain only

@VanillaAttila

Жыл бұрын

@@RobThePlumber How much electricity have you saved after installing these?

Would this work to connected to a coolant system of a truck to warm water on back of truck

Say you'd want to build a heat exchanger for your PC, how would you go about it. Seriously, I am considering it, and have for years. But I need some input and ideas how to solve such a problem. I am very well versed in PC modding, so that part doesn't worry me in the least. It's the heat exchanging part that has me worried.

@FinnT730

6 жыл бұрын

(AIO water cooling solutions exist now)

@jerrymaxey4664

4 жыл бұрын

Thermal plates they get cold on one side and hot on the other

Any thoughts on what happens if the interior pipe experiences failure for what ever reason. Granted, it's unlikely, but you'd be mixing your incoming water with outgoing waste and may or may not noticed it depending on if you could taste or see the contamination.

@RobThePlumber

9 жыл бұрын

You are also talking different pressures. You would always have more pressure in your potable water. So if you had a pin hole the waste would not make into the higher pressure zone.

@tylerlowden8023

7 жыл бұрын

the potable pressure would be much higher. yes you're mixing. and yes it's a health risk. but you'd likely just waste a ton of water and never know till your bill came. lol

@pedroocasio5915

6 жыл бұрын

Matthew Kahler a

How are you goin to heat the watet

how much money? in total?

After seeing the other vids n gathering the parts I thought about pvc n am on the mission. I’ll have a coppycoil insider can tap threads in the plastic for a pex fitting. 👍👍

sir, I am doing project on waste heat recovery from exhaust of bike.and by using heat to preheat the inlet air of suction temperature should be increase by 10 Celsius so can u explain design

@slrs3908

6 жыл бұрын

Sangram Ghorpade you want cooler air entering an engine. Not warmer. Warmer air is less dense and therefore less effiicient . Same with fuel.

@slrs3908

6 жыл бұрын

...and choke regulators, and on airplanes for de-icing, but he didn't say that it was for warm up, so I didn't assume.

what's your efficiency on that setup bud. pretty low surface area for heat transfer.....

@mcplutt

6 жыл бұрын

make it 10 feet long :-)

@trevorlambert4226

6 жыл бұрын

Something like negligible. And making it longer would barely even help.

Can I use aluminium pipe instead of copper rod or pipe. Please reply

M J stands for mechanical joint.

will it work with car mobile shower out of coolant heat thanks

@MrGlorybe

7 жыл бұрын

These days it is quite crowded under the hood but many a country boy has heated his lunch by placing a can (with the lid punctured) on top of the exhaust manifold of his truck or car. If one picked up some quarter inch copper tubing and coiled it around his exhaust system and pumped cold water through the coil it absolutely could bring the temperature of that water up to boiling.. However in modern cars there are so many electronic sensors that the information the car computer gets may cause unexpected consequences.

I'd watch part 2 but no link in description.

Pretty simple, agreed, but I think you would make a lot better exchanger by using several smaller copper pipes rather than one big one. Sure maybe a bit more work, but a lot of gain...and hey!, I think efficiency is more important than avoiding a little work.

hasta que de pronto un comentario en español

@buddysjr

7 жыл бұрын

Karwuay rap

@franDH3

6 жыл бұрын

buddysjr serpenting

Hello Rob, how are you? I am a friend from Iraq. Can you help me to write a research paper for this project because I chose it to be my graduation project for this year? With many thanks

what type of materials do you use?

@VideoMenu

8 жыл бұрын

+Ginary Catalina Cuervo Neira - What a insightful question. Luckily there is a video at the top of this page that can answer it.

Thanks!

My diesel generator's coolant is now assisting in heating the shower water.

its really good

@RobThePlumber

9 жыл бұрын

Nyuad Bms Thanks.

Will it work for marine engines

@josepeixoto3384

5 жыл бұрын

LOL; i know you're being sarcastic,rightfully so; DANGER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Does not work for ANYTHING!!!!!!!!!!!!!!!!!!!!!!!! people shd look up"shell and tube heat exchanger"!!!!!!!! you need LOTS LOTS of SMALL tubes in the CORE!!!!

What jenis HE is this?

I'd like to see it in action to see how effective it is

@thelazycat_

2 жыл бұрын

Not very effective

looking for part 2?

What is the pressure rating on the pvc parts?

@tylerlowden8023

7 жыл бұрын

beyond any residential application

@Bear-cm1vl

7 жыл бұрын

Tyler Lowden, at 70°F that is true, however PVC loses strength very rapidly as temperature rises and at 140°F the strength is only 22% of the rated pressure capacity. I have seen PVC pipes squirm in buildings at 90°F and joints separate at 100°F when operating at 1/3 of their maximum rated pressure. The derating charts are easily found on the Internet. One other thing; make sure you are using Sch (Schedule) 40 or 80 pipe. Hardware and big box stores sell cellular PVC for drain purposes and they are NOT designed for any pressure.

@MrGlorybe

7 жыл бұрын

There are several types of PVC, all have different pressure ratings. Some states do not allow PVC for hot water as health concerns are involved. PVC products fail in unusual ways. Most don't handle sunlight well. I would avoid PVC for any experimental uses or critical situations if failure occurs.

It's simple. Just go to INPLIX page and make it yourself.

What is the Purpose of Make a Heat Exchanger? Thank you...

@RobThePlumber

8 жыл бұрын

+Efrain Hurtado To exchange temperature between two liquids.

I guess we are not worried about the efficiency of this heat exchange design, correct? ;-) Sorry for the bad joke, but we need to use much more surface area of "contact" between the two mediums. That is the reason most heat exchangers have a lot of small pipes and fins.

Was able to reduce the cost of making an "all copper" heat exchanger by 85%. Hope you enjoy.

@fred-san

8 жыл бұрын

+Rob The Plumber Hello, thank's. Can you imagine Heat exchangerconnected to solar can heater ? (for solar fridge or clim'). Seen something like that in africa for fridge, but dont find it again.. Good winter.

You need to size a heat exchanger if you want it to be efficient at actually exchanging heat. This method will not give you good results, but it will work. The ratio between the outer diameter of the copper pipe and the inner diameter of the plastic pipe are crucial! they should be between 1.7 and 2.5 for bet results. also you want the fluids to flow in opposite directions. The small wall thickness of that copper makes about 2% difference between using copper or aluminium also by the way. The hottest fluid should be placed in the inner tube with the cooler fluid which needs heating in the largest tube. and you should never use copper on the outside because it has a high thermal conductivity, so you will just waste heat if you do so, what you want to do is use a material with a lower thermal conductivity on the outer pipe, this will help keep the heat INSIDE the heat exchanger. The copper tube will be very smooth so you might also want to consider giving it a brush to roughen that as it will help with heat transfer.

@RobThePlumber

10 жыл бұрын

As I agree with most of your comments, I must say your giving too much thought to this very basic exchanger. Your ratios mean nothing without knowing what the temperature of the fluids are and knowing how much of that temperature you need to transfer from one fluid to another. You also need to take into consideration of fluid velocities, pressures and viscosities. This exchanger was meant to show that you can make an exchanger with basic easy to find materials. This is not to be used with anything warmer than domestic hot water temperatures. ie.* capturing temperature from waste water from a shower and transferring to cold water feeding a hot water tank* There is nothing wrong with making the outside chamber out of copper! That is what simple pipe insulation is for.Also if you are going to go to the extreme of sizing an exchanger for efficiency,this is definitely not the proper design needed. The copper was roughed up, but in my design I use there is a copper fin, in a spiral that is brazed to the copper transfer tube. There is no way to slow the hot waste in the centre pipe without risking drainage and venting problems. In any heat exchanger fluids ALWAYS run in the opposite direction. I show that in the video.... I have quite a few videos to release on different exchangers and the sizing of them. It is unfortunate, work has been hectic and I cannot release as many as I would like to. Thanks for watching and taking the time to comment.

@evo1empire

10 жыл бұрын

I see your point, I recently just finished writing my dissertation as well as a patent application for a new type of heat exchanger which has a very advanced design, so I am still in the mind set of achieving ultimate efficiency in design. But like I said this design will work, but it could be greatly improved if a few hours were spent running some numbers, and I think you should emphasise this more to the viewers, you could probably even do a few extra videos on how to run the numbers, for this application a simple dittus boelter equation would work fine for both the tube and the annulus. It was an interesting video however, quite a novel approach which I like, I will watch some more videos once i have some free time. Also, fluids do not ALWAYS flow in opposite direction in a HX, its completely dependant on the application, as you are recovering waste heat, then yes, you would want a counterflow arrangement as it will capture the most thermal energy. Just because the outside of the copper pipe is lagged doesn't mean you are not losing heat from it, so using low thermal conductivity materials for the outer later and then using insulation also, will improve this.

@DustinLowes

Жыл бұрын

​@@evo1empire what can I use inside the inner copper pipe to heat my pool water entering the outer chamber? I'm assuming that just heating the empty pipe with a fire isn't the best, but I'm worried that heating a liquid in the copper pipe in a closed loop could explode.... Thoughts?

it's getting more effective if made the inner pipe twisted

the all coper is better. all you have to do is insulate the outer pipe to avoid heat loss.

one should make the heat exchanger so that the water flowing in both pipes flows slow enough to exchange the heat from side to the other. if the water flows too fast it wont absorb much of the heat. maybe make the copper a lot smaller so the mass of the outside water will transfer more heat!

@RobThePlumber

9 жыл бұрын

kiffertom I see what your saying but you would be breaking the plumbing code by slowing down or reducing the shower drain size. It would work short term but in the long term your drain would get clogged up pretty quick.

@slrs3908

6 жыл бұрын

For reference, if you go from a smaller size tube to a larger size, the water will slow down and heat transfer will be more efficient. Try that for both lines.

pas mal

Not trying to Troll but if you decide to go this route please do yourself a favor and get a backflow device such as an RPZ or you will have god knows what going into your water heater. I wouldnt drink anything that has been traveling outside and back into a supposedly closed (but uninspectable) heat exchanger. If that heat exchanger fails your family could be drinking pool water.

Might as well I guess....P.lumbers have been robbing me for the past 40 years.

You will never win much... and after few years you need to replace the rubbers...

not tested then, I dont believe it

Biggest deslike

Think you got your intro a little backwards. Shouldn’t it be “how to make a heat exchanger cheaply: rob the plumber”...?

Lame don't quit plumbing yet

Wow. That's really not going to work very well, as in probably not even worth the time it took to watch the video let alone make it. Two huge problems. First, the surface area of the copper pipe is very small. A bigger problem is that even at that, very little of the potential heat exchange is going to occur, because most of the time that drain pipe isn't going to be full. Water flowing downwards is going to cling to the wall of the drain, leaving mostly air between it and the copper pipe. If you oriented it sideways it would be marginally better, but still less than ideal, and I can't imagine how those two opposing 90 bends in a horizontal plane are going to meet building code for a drain. For that matter, the reduction of the drain diameter is going to be a non-starter as well.

Hi Rob Good job on the counterflow temperature exchanger just like the moonshiners do. Gday from OZ Regards from another plumber be safe out there theses can get dangerous when the flows aren't correct and pressures build up