Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Electric water heat...
 
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!

Electric water heater

 
Air Source Heat Pumps (ASHPs)
Last Post by bontwoody 3 years ago
5 Posts
3 Users
0 Reactions
1,617 Views
RSS
 bretix
(@bretix)
Estimable Member Member
Joined: 4 years ago
Posts: 85
Topic starter 10/06/2023 9:52 pm   [#995]

Would it be more economical to run a electric water heater in addition to an installed heat pump, but changing that to solely run the heating circulation.❓


2 10kw Grant Aerona3
Heat loss calc 16.5 kw @ -2.8 degrees
4.32 PV


   
Quote
bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 4 years ago
Posts: 1012
12/06/2023 12:44 pm  

Hi, im not quite sure that I understand what you are asking, but an electric heater will have close to 100% efficiency whereas a heat pump will have several times that efficiency depending on the temperature to which the water is heated and the outside temperature. Hope that helps


House-3 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
ReplyQuote
 bretix
(@bretix)
Estimable Member Member
Joined: 4 years ago
Posts: 85
Topic starter 12/06/2023 1:08 pm  

Sorry I was probably being vague but I was thinking out loud along the lines of something like this. I guess it was knee jerk to thinking I could run two heating systems (think I'd had a beer at the time so wasn't thinking!) 1. Just for hot water  and 2. For heating alone as the heat pump won't deliver heat whilst it's heating the water. I think I've answered the question myself by just getting a solar diverter.

I've put the articles on anyway just out of interest, although again it probably more orientated to Australia!

https://www.herschel-infrared.co.uk/hot-water-heating/

In relation to this article where they are saying electric water heaters may be better at storing energy versus a battery used to heat the water in a cylinder. 

https://www.popularmechanics.com/science/green-tech/a44108982/electric-water-heater-can-store-energy-better-than-tesla-powerwall/


2 10kw Grant Aerona3
Heat loss calc 16.5 kw @ -2.8 degrees
4.32 PV


   
ReplyQuote
 Fazel
(@fazel)
Estimable Member Member
Joined: 3 years ago
Posts: 124
12/06/2023 2:53 pm  

Your HP should be able to provide hot water in between heating the house, a HP heated house should have a back-up electric water heater anyway.



   
ReplyQuote
bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 4 years ago
Posts: 1012
12/06/2023 4:52 pm  

@bretix I think they are essentially saying that renewable energy can be stored as heat in a water tank! Stop the press 😀 


House-3 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

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