Results 1 to 6 of 6

Thread: Noob Help

  1. #1
    Senior Member
    Join Date
    Mar 2007
    Location
    Eden, New South Wales, Australia
    Posts
    140

    Noob Help

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi People,
    I have seen HX machines come up quite a lot in discussions about Commercial machines BUT, what is HX or what does HX stand for? where did it come from?....indeed where id it go to?

    Our LUX grinder arrived today...WOW big step up from the Gaggia MM....Pavoni is much happier now!!!


  2. #2
    Senior Member
    Join Date
    Jul 2006
    Posts
    3,498

    Re: Noob Help

    snooooze

    HX stands for Heat eXchanger.... and is part of most commercial and prosumer machines.

    There are two temperatures required with the water in these (or any) coffee machine.... about 125C which produces the steam and about 93C to extract the coffee (125C would burn it really well).. And both need to be available at the same time (unlike most domestic machines)

    So you could have two boilers (one for steam and one for brewing) which some very expensive machines do.... or you have one large boiler with water at 125C..... and as I said above - that is far too hot for coffee...

    So how do you heat water at say 20C (from the supply or a reservoir) up to the required 93C... Well you pass it through a pipe inside the boiler where some of the heat from the 125C water is exchanged into the cold water.... heating it up to the desired 93C.... and it then is used to make the coffee....

    This is a simplified explanation.... there is a lot more engineering involved and the process is "tuned" to get the correct temperature.... but the above gives you a pretty good idea how it works and why it is called a Heat eXchanger or HX...

    Hope that helps.

  3. #3
    Senior Member
    Join Date
    Apr 2007
    Posts
    284

    Re: Noob Help


    If you are looking for a consumer machine with two boilers, then the Sunbeam EM6910 seems to fit the bill.

    It has a thermoblock boiler for the portafilter and a separate boiler for the milk steamer. :)

    And best of all, its an automatic, so easier for noobs like me to make a coffee.

    Of course, its no patch on real HX machines. Im only dreamin if I think that! Hehehe!

  4. #4
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    17,547

    Re: Noob Help

    Gday tempest and welcome to CoffeeSnobs [smiley=thumbsup.gif],

    Thermoblocks and Boilers are actually quite different beasts. An espresso machine Boiler is basically a pressure vessel containing a volume of water into which is immersed a heating element. The temperature is controlled, in the simplest form, by one or more thermostats. Typical volume is anything from about 300ml and up.

    A T/block on the hand, is an entirely different matter. It consists usually of a cast aluminium block into which has also been cast an electric heating element. A capillary is also cast into the block which follows a very tortuous path and is in very close proximity to the heating element. When energised, water flows in one end of the block, gets heated while following the capillary path and exits the block at the desired temperature, also usually controlled by one or more t/stats. The actual internal volume of the capillary path is very, very small and probably in the region of 20ml+.

    Hope this helps explain the differences somewhat. If not, theres a lot of info and diagrams/photos on the Net that will be revealed by a google search. All the best,

    Mal.

  5. #5
    Senior Member
    Join Date
    Mar 2007
    Location
    Eden, New South Wales, Australia
    Posts
    140

    Re: Noob Help

    Thanks Kind Sirs (and Madames maybe) All make sense now....BLING....light comes on

    Ta

    Ohh forgot to add.....The lux is here YAY....alas no beenz....they arive tomorrow LOOK OUT WEEK END

    BIG Coffee days

  6. #6
    Senior Member
    Join Date
    Feb 2006
    Posts
    2,335

    Re: Noob Help

    Behmor Brazen - $249 - Free Freight
    Quote Originally Posted by tempestv8 link=1176213432/0#2 date=1176248839
    If you are looking for a consumer machine with two boilers, then the Sunbeam EM6910 seems to fit the bill.

    It has a thermoblock boiler for the portafilter and a separate boiler for the milk steamer. :)

    And best of all, its an automatic, so easier for noobs like me to make a coffee.

    Of course, its no patch on real HX machines. Im only dreamin if I think that! Hehehe!
    Its a dual thermoblock machine. I dont think Paul Bassett wanted thermoblocks when he was first working with Sunbeam...



Similar Threads

  1. Noob Q: What are these CS scales? (eg.-CS9)
    By samdasurfinman in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 2
    Last Post: 18th February 2011, 01:01 PM
  2. Noob here - I have a lot of reading to do!
    By NeMeSiS in forum Brewing Equipment - Midrange ($500-$1500)
    Replies: 37
    Last Post: 9th September 2009, 05:53 PM
  3. Some Advice For a Noob
    By andreasb in forum Brewing Equipment - Midrange ($500-$1500)
    Replies: 7
    Last Post: 1st May 2009, 05:17 PM
  4. Mokita Noob Needs Help
    By bennyb in forum Brewing Equipment (non-machine specific)
    Replies: 15
    Last Post: 3rd February 2006, 08:17 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •