Author Topic: Adding an extra heat exhanger on bd35f compressor  (Read 2377 times)

elias

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Adding an extra heat exhanger on bd35f compressor
« on: November 14 2022, 17:17 »
Hi to all I am planning to put between the compressor and the condenser a heat exhanger like this  https://packless.com/products/refrigerant-heat-exchangers/hxr-100 . In the larger pipe will be water passing . Here comes my concern .
Will the compressor motor function properly with an extra obstacle , will be the pressure ok?

Yngmar

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Re: Adding an extra heat exhanger on bd35f compressor
« Reply #1 on: November 14 2022, 17:54 »
You need to cut open the system, which means loss of refrigerant gas (should be captured really, rather than just vented), then solder this in, making sure it's leak free. That means afterwards the system needs to be evacuated with a vacuum pump and recharged with gas. You'll need slightly more gas than before.

It's not a capillary tube, so no issues with pressure or throughput. It seems a rather small area for a heat exchanger though, so I doubt it will help much. Also, you can gain virtually the same benefit without having to cut open, vent, evacuate and regas the system by running the water pipe parallel and tied to the existing return pipe (before the air condenser), and over a greater length than this thing.
(formerly) Sailing Songbird  ⛵️ Bavaria 40 Ocean (2001)

tiger79

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Re: Adding an extra heat exhanger on bd35f compressor
« Reply #2 on: November 14 2022, 18:08 »
Sounds like a lot of work for little benefit.

elias

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Re: Adding an extra heat exhanger on bd35f compressor
« Reply #3 on: November 14 2022, 19:29 »
That was the original idea , parallel to the water pipe , though the pipe is plastic and I had to replace the length of contact with copper . A mechanical engineer friend of mine specialised on modelling of this kind told me that the much math and time to solve it worths the around 50€ try that this process will cost me . Since the pressure drop is not an issue as you agree I ll give it a shot , the only concern is if the soldering of the pipe is bad can create leaks in the future , the old condenser stays .