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16-08-2014, 06:06 AM #1
Internal Leakage In Brazed Heat Exchanger
Please in need your help in Internal Leakage In Brazed Heat Exchanger
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16-08-2014, 06:12 AM #2
Re: Internal Leakage In Brazed Heat Exchanger
Alamda, pretty sure it cannot be repaired, so you need a new one.
Best to find out what caused it, freeze up, poor flow etc.
Is the leak on refrigerant side?
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16-08-2014, 07:53 AM #3
Re: Internal Leakage In Brazed Heat Exchanger
yes , in refrigerant side to the water tank side
i fond oil in the water tank
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16-08-2014, 08:34 AM #4
Re: Internal Leakage In Brazed Heat Exchanger
can you explaine more to me the resonse , what caused it?
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16-08-2014, 11:13 AM #5
Re: Internal Leakage In Brazed Heat Exchanger
Poor internal brazing or a freezeup on the water side caused by a pump failure (possibly). I've see it many times. What brand of HX and what position is it placed?
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16-08-2014, 12:58 PM #6
Re: Internal Leakage In Brazed Heat Exchanger
In rarer cases I have met cavitation and corrossive water chemistry together with other conditions mentioned above played a part in causing leakages in heat exchangers.
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25-08-2014, 11:38 AM #7
Re: Internal Leakage In Brazed Heat Exchanger
thanks for reply and the model of exchanger GBH500H-AE-60 and i installed its new after tow weeks leakages
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25-08-2014, 08:27 PM #8
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26-08-2014, 03:06 AM #9
Re: Internal Leakage In Brazed Heat Exchanger
Braised plate HXs do not like rapid cyclic temp changes as stainless partitions will crack and fail, I have killed a few, so now stipulate double wall and reduce the failure rates. On larger applications the re-stackable versions.
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26-08-2014, 03:45 PM #10
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26-08-2014, 03:48 PM #11
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26-08-2014, 04:00 PM #12
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26-08-2014, 09:21 PM #13
Re: Internal Leakage In Brazed Heat Exchanger
If you go many times from heating to cooling, for example, without enough time to gradually evenly heat up or cool down the entire HX, it can cause stresses that break the stainless.
Each application has a HX that is right for it. It may be "plate and frame" with gaskets or brazed, or "shell and tube".