Screw-in heat exchanger

Piwoslaw · 07-17-23, 01:01 PM

I once came across a picture of a HX like this

This would be good to screw into one of the 2" ports of my heat buffer, to connect a heat pump instead of one of the electric heaters.

Just wondering:

How difficult it would be to make one of these?
How efficient would it be, assuming it is immersed in warm water (30-50 deg C)?

Daox · 07-23-23, 08:53 PM

That is a cool idea. I would imagine you could probably make something similar with soft copper, but I imagine it would be pretty difficult. I'm not sure how the heck they twist that without crushing the fins on it...

Zwerius · 07-28-23, 10:24 AM

Quote:

Originally Posted by Piwoslaw

I once came across a picture of a HX like this

This would be good to screw into one of the 2" ports of my heat buffer, to connect a heat pump instead of one of the electric heaters.

Just wondering:

How difficult it would be to make one of these?
How efficient would it be, assuming it is immersed in warm water (30-50 deg C)?

You can only transmit a reasonable amount of heat with a small heat exchanging surface like this, if you have a large temperature difference between the energy input side and the water around it.
So with an electrical element this works fine, but not with a heat pump, since the heatpump has to generate such a high temperature, that it's efficiency will be very poor.
The only way to transmit the heat with a lower temperature difference (over the heat exchanger) and so a more efficient operation of the heatpump, is when you will be using a much larger heat exchanging surface.

07-17-23, 01:01 PM	#1
Piwoslaw Super Moderator Join Date: May 2009 Location: Warsaw, Poland Posts: 964 Thanks: 189 Thanked 111 Times in 87 Posts	Screw-in heat exchanger I once came across a picture of a HX like this This would be good to screw into one of the 2" ports of my heat buffer, to connect a heat pump instead of one of the electric heaters. Just wondering: How difficult it would be to make one of these? How efficient would it be, assuming it is immersed in warm water (30-50 deg C)? Attached Thumbnails __________________ Ecorenovation - the bottomless piggy bank that tries to tame the energy hog.

07-23-23, 08:53 PM	#2
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	That is a cool idea. I would imagine you could probably make something similar with soft copper, but I imagine it would be pretty difficult. I'm not sure how the heck they twist that without crushing the fins on it... __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.