Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Thermostats, Volumi...
Auto-Balancing TRVs...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Auto-Balancing TRVs for ASHP system

 
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Last Post by Derek M 4 years ago
2 Posts
2 Users
2 Reactions
3,317 Views
RSS
Dunlorn
 Dunlorn
(@dunlorn)
Estimable Member Member
Joined: 4 years ago
Posts: 79
Topic starter 22/02/2023 1:59 pm   [#850]

I had my ASHP installer and a Joule engineer out to fettle a few things on my system this week. One recommendation that came up was to use auto-balancing TRV's around my rads.

I admit I'd never heard of them but, having looked on t'internet, there are claimed efficiency savings of c8% through their use.  So, quick question, has anyone any experience of them on an ASHP system and are they as good as the claim? 


2 x 12kW Samsung Gen6 ASHP, 5.6kW solar PV ground mounted c/w 10kWh Puredrive battery & Solis inverter.


   
Quote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
22/02/2023 3:30 pm  

Posted by: @dunlorn
↑

I had my ASHP installer and a Joule engineer out to fettle a few things on my system this week. One recommendation that came up was to use auto-balancing TRV's around my rads.

I admit I'd never heard of them but, having looked on t'internet, there are claimed efficiency savings of c8% through their use.  So, quick question, has anyone any experience of them on an ASHP system and are they as good as the claim? 

I not certain how such a valve would perform with an ASHP.

Reading the details for the Drayton version, it would appear that they were developed for gas and oil boilers, since the claimed improvement in efficiency would appear to be by reducing the RWT.

With a heat pump improved efficiency requires a reduction in the LWT, which I'm not certain such a valve would produce, particularly if the heat pump is operating in WC mode, since the LWT is set by the outside air temperature.

From the installers point of view they would appear to be a much easier 'fit and forget' alternative to correctly balancing the system using the lockshield valves.

The objective of balancing the system, is to try to match the heat energy output from the heat emitters in each room, to the heat loss of that room, whilst maintaining the desired temperature. As the LWT from a heat pump increases and decreases with variations in the outside temperature, the individual room temperatures should remain reasonably constant at the desired level.

 



   
👍
2
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Members Online

Click to access the login or register cheese
Protected By
Shield Security PRO