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Thread: What is a heat exchanger?

  1. #1
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    What is a heat exchanger?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    This may sound like a silly question, but Ive done some googling, and have not exactly found an answer - what is an HX machine that people talk about?

    I assume the HX refers to a heat exchanger, something akin to a thermoblock sitting in the water path? Is it a machine that has a boiler, and water goes from that through a heat exchanger to end up with a consistent temperature for shot after shot after shot?

    Apologies if this is in the wrong place, but I have found heaps of references to HX machines, but nothing about how they work, what they are, and this is one of the most recent threads.

  2. #2
    TC
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    Re: What is a heat exchanger?

    Hello mallie,

    The first three Yahoo hits I received all answered your question really well.

    You could also try the CS quick search tab >>>>>^^^^^^^

    Its also best not to post completely off topic in another thread. Thread moved ::)

    2mcm

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    Re: What is a heat exchanger?

    2mcm - Thanks for the response - with the search to find out more about what is a HX coffee machien I read about 15 threads that mentioned HX, but came to no conclusive answers and my google terms seemed to be off. Found some now!

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    Re: What is a heat exchanger?

    You have the right basic idea it is one tube within a larger vessel of water to raise the water temp in the case of a HX coffee machine. Also used in industry to cool as well. A car radiator is a form of heat exchanger where air is the cooling medium.

    A good sart for a read is here http://www.home-barista.com/hx-love.html

  5. #5
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    Re: What is a heat exchanger?

    Looks like Ill need to keep putting $2 away every time I make a coffee. When the Silvia dies Ill be able to buy 5 or 6 HX or twin boiler based models ;).

    I wont dare start a thread asking which is better HX or Twin, I dont feel like getting lynched.

    So much to learn about these beasts.

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    Re: What is a heat exchanger?

    Quote Originally Posted by 5A565B5B5E525A5450370 link=1291261422/4#4 date=1291265151
    I wont dare start a thread asking which is better HX or Twin, I dont feel like getting lynched.
    I had a laugh.... yesterday I read 13 pages of arguments on this topic on the HB website. It was battle of the HB egos.

    I think there is a consensus amongst many that neither is better and each has its advantages. Perhaps if one was clearly "better" the other would be phased out.

  7. #7
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    Re: What is a heat exchanger?

    Quote Originally Posted by 4C4946465140280 link=1291261422/5#5 date=1291284848
    I had a laugh.... yesterday I read 13 pages of arguments on this topic on the HB website. It was battle of the HB egos.
    Theres probably that and more from discussions on CS too.

    As you mentioned, too many egos in the same room discussing this topic can get way off track from where reality actually resides. In a home situation where maximum runs on the machine are not going to be similar to a commercial machine, then there are just as many pros and cons for either design. Technique and the quality of the coffee being used have a much more significant impact on the quality of the brew in the cup.... ;)

    Mal.

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    Re: What is a heat exchanger?

    Quote Originally Posted by 3F3A353522335B0 link=1291261422/5#5 date=1291284848
    I think there is a consensus amongst many that neither is better and each has its advantages.
    Yep but it still makes for great debate, then throw in pressure and or temperature profiling just to mix it right up ;)

    Think I will stick to my nice simple non HX lever machines for daily use, simple for us simple country folk :)

  9. #9
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    Re: What is a heat exchanger?

    single boiler is better :D

  10. #10
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    Re: What is a heat exchanger?

    I had a laugh @ Maheel, from my readings for me, I think youre right.

    Im just hanging out for tomorrow, first weekend with the Silvia :D

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    Re: What is a heat exchanger?

    Behmor Brazen - $249 - Free Freight
    “Blind we are to great coffee we could not see if machine is all we look” *Yoda



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