How To Make A Heat Exchanger


Basic heat exchanger design.
Basic heat exchanger design.

Here is a video that teaches you how to make a heat exchanger. It is a very basic exchanger

but effective. This heat exchanger is the underlying design of many. Be sure to check my other heat exchanger videos that use this design.

If you want to learn the basics of building and designing heat exchangers, this is an absolute must starting point.

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3 thoughts on “How To Make A Heat Exchanger

  1. Hi Rob,
    To start with … nice project and well done. I’m planning to make one my self and need a head chance of 2KW. I’m planning to connect it to a solar panel with a peak capacity of 2KW.
    I was wondering if you have some specifications on this type of heat exchange.
    Heat exchanges are characterized by a specific number called U which is the Heat transfer coefficient of a certain type of heat exchange. It is expressed in W/m²*K.
    The expected value of U for these type of heat exchanges is around 1500W/m²*K.
    Do you have any experimental data which indicate the capacity or U value of your pipe heat exchange.
    A calculation I made showed that an counter exchange of 1.8 meter had a capacity of around 3500 Watt, with 20 and 40 degree temperature differences at both ends

    I hope you can help me with some practical data.
    Regards Oscar

  2. Hi Rob,
    The second sentence should be :
    I’m planning to make one my self and need a heat exchange of 2KW.

  3. Allen

    Hi Rob – great videos on the heat exchangers. I have a few questions if you have time to answer:

    Can one use DWV copper pipe for the 2″ and 1 1/2″ lines? Home Depot and Lowes only carry DWV in those diameters.

    Further, if I decide to go to the PVC and copper option, will the MJ coupling be reliable for holding back the water pressure, as it is holding back the water supply? Obviously, I am concerned about a leak 5 or more years later when the HX is far from my day to day thoughts?

    Thirdly, how many showers can one hook up to one HX line? I could get two for sure, and maybe a third.

    Lastly, is the drain vent super important? The third shower drain I am thinking about would have to flow about 7 ft thru a ceiling and then down about 9 ft to where I would have to bring it back to (near) horizontal to include it in the HX.

    I am also contemplating using a full 12 foot pipe to configure the HX, for maximum heat transfer.

    Thanks again, look forward to the videos you suggested about banking exchangers. Maybe that is what I need to do.

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