Copper solar collector


  #1  
Old 03-09-23, 09:51 AM
S
Member
Thread Starter
Join Date: Mar 2023
Posts: 1
Received 0 Upvotes on 0 Posts
Copper solar collector

I have a solar collector with copper pipes in it. I would like to use it to heat my fiberglass hot tub. I know chlorine and bromine react with copper and discolor the water. What can I use that will not react with copper? Or is there some way to deal with the result of copper and chlorine?Thanks!
 
  #2  
Old 03-09-23, 10:40 AM
P
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 27,986
Received 2,231 Upvotes on 1,990 Posts
It's not a great idea to heat your spa with a copper heater. It will be very important to properly maintain your water chemistry to minimize the amount of copper that gets into the water. Notice I said "minimize" and nothing absolute like "that will prevent the copper from being eroded".

You can also add ozone to your list of things not to use and I think MonoPeroxySulfate (MPS) as well. The core problem is that most sanitizers are oxidizers which can attack copper and many other metals. I think a silver ion treatment (Nature's2) could be used but I have never heard of it being used as the sole sanitizer. Usually it's only used as a maintenance treatment while the heavy lifting is done by an oxidizer.

You could add a heat exchanger so the two waters don't mix. It will add expense and you'll loose efficiency through the exchanger but at least you won't end up with copper blue water.
 
sundug1 voted this post useful.
  #3  
Old 03-09-23, 01:02 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,484
Received 4,055 Upvotes on 3,638 Posts
You could add a heat exchanger so the two waters don't mix. It will add expense and you'll loose efficiency through the exchanger but at least you won't end up with copper blue water.
I agree. Use a heat exchanger to isolate the water streams.
 
sundug1 voted this post useful.
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: