Forums

Forums
Members
JamesPa
Activity
 
Notifications
Clear all
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 20, 2025
Profile Activity
Topics: 17 / Replies: 2881
AllTopicsReplies
Reply
RE: Do setbacks save energy without compromising comfort?

@cathoderay Having looked again at the graph I'm not sure I agree with your analysis. The lwt achieved appears to be equal to the lwt set, so the hea...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

Actually, on second thought, it's the actual temperatures which are measured and reported as integers. Given that those do vary, and given that flow ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

Good point. Depending on how good the control loop is the actuals may be a bit noisy, which on average might improve the resolution, but that's clutc...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

To reconcile the figures measured at the heat pump it must be measured at the heat pump. Measuring it at the phe (and measuring dt across the phe) wi...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

Manufacturers normally specify if figures are net of defrost. Of course if the tests are done in the arizona desert rather than on a small island on...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

I assume your figure, like mine, is from flow rate and dt. If so then they are subject to the same errors/factors. It could be flow rate, it could b...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

It uses all the one minute data positive and negative except if the diverter is set to dhw.. Energy for defrost comes from the house so should be and...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

If I understand the graph correctly the 60min average energy out seems to be around 8kW. Is this right?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

Thanks for the data. I have taken this and plotted various adjustments. Here are the key results. Each point is one noon-noon measurement. I ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

yes it has thanks. I was apparently logged in, but I logged out and logged back in and this magically appeared

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any Grant Aerona owners using their Low Loss Header immersion heater?

Clearly its either undersized (which is unusual but possible) or badly set up. Installer needs to take responsibility unless someone else did the cal...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any Grant Aerona owners using their Low Loss Header immersion heater?

Are you sure that the problem with defrost cycling is not caused by the LLH? Two reasons: 1. The LLH will in all probability reduce the FT to t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 211 / 243
Share:

Join Us!

Podcast Picks

Latest Posts

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