Forums

Forums
Renewable Heating
Air Source Heat Pum...
4 port buffer tank ...
 
Notifications
Clear all

4 port buffer tank connections

 
Page 7 / 7
Air Source Heat Pumps (ASHPs)
Last Post by iraknic 11 months ago
80 Posts
9 Users
32 Reactions
9,340 Views
RSS
 iraknic
(@iraknic)
Trusted Member Member
Joined: 1 year ago
Posts: 24
Topic starter 08/02/2025 7:25 pm  

Hi @editor. I have checked delta t from the control panel and from the buffer ports with a thermometer



   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3860
08/02/2025 8:33 pm  

@iraknic I used a thermal imaging camera, and the temperature readings were “inaccurate”. I suppose the water inside the copper pipe will be warmer than the exterior of the copper pipe. I assume your copper pipe readings were lower than the COP readings.


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
 BobTSkutter
(@bobtskutter)
Estimable Member Member
Joined: 12 months ago
Posts: 94
08/02/2025 8:53 pm  

You need to adjust the surface emmissivity setting of your thermal camera.

Try this, assuming you have a metal kettle with a polished exterior surface and the copper pipe is also polished.

Boil the kettle - the water will be 100C.  Point the camera at it's metal outside and adjust the emmisivity setting to get 100C.

Now take a temperature reading of the copper pipe with the same emmissivity setting.

Normally I'm looking at thermal photos with temperatures around 2000F and surfaces that are rough and none polished.  The surface finish can make a huge difference to the measured temperature using cameras.  The only way to be sure is to use a contact thermocouple and press it against the pipe to get an acurate temperature reading.

But saying that, all you're really interested in is the temperature DIFFERENCE between the four pipes, and that will be unaffected by surface finish and emissivity (provided all the pipes are the same material and surface finish).

Regards

Bob

 



   
👍
1
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3860
08/02/2025 9:04 pm  

Posted by: @bobtskutter
↑

You need to adjust the surface emmissivity setting of your thermal camera.

Excellent suggestion. Didn’t even cross my mind to do that. Thank you.

 


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3860
08/02/2025 9:14 pm  

@iraknic I’m doing a small video on buffers, and am using our badly piped one as an example, but would also like to include yours if possible. If you’re OK with that, can you please send me a video and some photos of your piping and tank, shot vertically, in HD. You can send via WeTransfer.com to editor@renewableheatinghub.co.uk if you’re in.


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
 iraknic
(@iraknic)
Trusted Member Member
Joined: 1 year ago
Posts: 24
Topic starter 09/02/2025 3:16 pm  

@editor just sent some files. Please check and let me know if sufficient



   
🙏
1
ReplyQuote



Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3860
09/02/2025 8:53 pm  

@iraknic I just had a very quick look. Is that buffer tank on a roof?


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
 iraknic
(@iraknic)
Trusted Member Member
Joined: 1 year ago
Posts: 24
Topic starter 09/02/2025 9:00 pm  

@editor yes, its on a roof



   
🤯
2
ReplyQuote
Page 7 / 7
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →