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exchangers

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

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  1. R

    Ideal W CF 450 leak between heat exchangers

    On a 35 year old very good condition Ideal W CF450 (GC 41 407 51) The top two of the 4 joints between the two halves of the cast iron heat exchangers are weeping when the boiler is warming up. - no leak at all when cold or hot Question:- anyone know what type of seals are used between both...
  2. S

    Ideal logic main heat exchangers

    Why are these still leaking on recent boilers. Had a call today from a new customer to look at one of his renters, for frequent pressure loss. He had a logic plus 35 installed in 2017( not by me). I whipped the cover off and the trap had the usual white floating fog, consistent with the...
  3. S

    Alloy heat exchangers

    What chemicals would you recommend for Alloy boilers, cleaning and protection, also how long do they last before leaking. I have used fernox mb-1 on 2 Baxi boilers and they both leaked within 5 years. Have I been unlucky or is it the norm. What I would call the penny washers failed on both...
  4. R

    IDEAL are up against it!!! Heat exchangers replacing

    to just bring to light the problems Ideal are having and why they are trying to default on their warranties for their boilers. picture says it all really and this is just one example of a heating engineers typical weeks work !!:thumbs_down: thats TWELVE heat exchangers that have failed, and...
  5. tyrrellclark

    Ss plate exchangers

    Anybody have any thoughts on what's the best chem to use. Have been using lately scale kamco breaker HD, works like a dream but very strong, then found out that it should not be used with stainless steel. Kamco said it's too aggressive, but loads of people spoken to use brick acid or drain acid...
  6. A

    Worcester heat exchangers

    Heard about this once or twice but have never seen it...... until today..... twice! Two customers today with CDi Classics losing pressure quickly, investigated and soon found both had a split HEX, losing water down the condensate. One 7 years old and one 10. You guys find this a lot? I have...
  7. GQuigley67

    Plate heat exchangers

    Need one for a 80kw Worcester boiler to separate from gravity system, Worcesters own is nearly £700 and rated 80-100kw. Anyone recommend a cheaper option?
  8. B

    Plate heat exchanger

    Hi quoting for a reply old church building. Can anyone post a link of a good heat exchanger as I want to keep new boiler circuit separate
  9. G

    ideal mexico super rs460 heat exchanger leak

    hi my boilers flue is like a car running with it's head gasket blown lots and lots of steam that's for the first hour and then it clears up. last week it wouldn't light up and I had to strip it to find and fix the fault and looking at the heat exchanger I noticed some dried up leak stains, as I...
    • GA@46
    • Thread
    • exchanger exchangers heat heat exchanger ideal leak mexico noticed super
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  10. J

    multiple replacement heat exchangers

    Hi All, I have a problem with a Worcester Bosch Greenstar 24i boiler. It has had several heat exchangers over the last six years due to limescale build up, what happens is that the hot water supply loses pressure then it won't warm the water. The central heating continues to work ok. A new...
    • james75
    • Thread
    • exchanger exchangers heat multiple problem replacement scale water
    • Replies: 15
    • Forum: Plumbing Jobs | The Job-board
  11. W

    commercial heat exchangers vs domestic affecting efficiency.

    Just found this out recently that commercial boilers only slightly bigger than domestic in kw that have a bigger case/ heat exchanger etc are more efficient. apparently it because domestic boilers with there fit in cupboards design have to have a smaller heat exchanger thus have to have the co2...
  12. P

    Advice needed on heat exchangers for log boiler

    Hello I would welcome advice on heat exchangers for a log boiler. First a description on my system: Existing system: This is a 115000BTU = 33kW sealed system pressure-jet oil boiler. This has a very low water content as the radiators are either fan convectors, Finrads or bathroom towel rails...
    • PinkyPerky
    • Thread
    • advice boiler central heating system exchangers heat house needed oil system
    • Replies: 18
    • Forum: Plumbing Jobs | The Job-board
  13. gassafe

    Bi thermal heat exchangers ?

    Bi thermal heat exchangers... I think there called that anyway... The ones in old Worcesters 24i, and combis with no plate heat exchanger & diverter valve. I have to look at one next week. Customer says water flow poor, hot water almost boiling at taps!! Sounds like the heat ex is scaled up...
  14. P

    Vaillant Primary Heat Exchangers & Blockages

    Are any other Gas/Heating engineers having problems with blocked primary heat exchangers on Vaillant boilers, even on new installations that have been chemically flushed and have filters/dirt seperators protecting the new boiler/s ? We are prodominantly a mechanical installation company...
  15. I

    Cleaning boiler heat exchanger - a handy hint

    I have a good set of brushes and cleaning tools for boiler heat exchangers but recently came across one where none was small enough to get into the space. To the rescue, a 5mm cable tie. The serrations help to get deposit off the fins, and the plastic is too soft to damage anything. Job done.
    • Ian B
    • Thread
    • boiler cable cleaning exchanger exchangers handy heat heat exchanger oil tools
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  16. D

    Plate heat exchangers

    On what systems would you find a plate heat exchanger why are they used and how do they work?
  17. N

    powerflushing hot water heat exchangers

    hi everyone just wondering if you guys have had any luck with powerflushing hot water heat exchangers ? we have the kamco pf with magnet,heater element and pump head adaptor. normally get called to jobs when its just to late to try cleaning them { barely any flow } so replacement required. like...
  18. N

    powerflushing hot water heat exchangers

    just wondering how everyone gets on with powerflushing hot water heat exchangers in combis. we have the kamco powerflusher with magnet, pump head adaptor and heater element . tend to get called out when its to late barely any flow, so generally replacements required. not sure if it is worth...
  19. P

    To power flush both combi heat exchangers

    Some say do not power flush either of the combi heat exchangers in situ and some say it is OK. I intend to put a pump adapter on a Bosch pump in a Worcester Combi 24CDi and first power flush the central heating system, including the central heating heat exchanger. Then isolate the flow and...
  20. M

    which are the best heat exchangers in modern boilers

    Interested in discussing which you think are the best and why? Stainless seem to have the best reputation but are modern silicone/cast alliminium heat exchangers really inferior? I was at a Main course last week and they basically said the Mains are the same as the Baxi's and Pottertons except...
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