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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 25, 2025
Profile Activity
Topics: 17 / Replies: 2183
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RE: Do setbacks save energy without compromising comfort?

I am not convinced you are going about this the right way. Normally you take a hypothesis (model), use it to make a prediction, and then test that aga...

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

I would, but at the moment I have what I think is the right balance between getting a saving and comfort. I have a bit of a cliff edge as the IAT fall...

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

The latest last 24 hours of data: Pretty much as before, steady and mild OAT at around 10 degrees, heat pump cycling around twice an hour to m...

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

I have never said all heat pumps are Mideas, quite the opposite, nor have I ever said all systems have primary and secondary pumps, again, quite the o...

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

@bob77 - I think your understanding is correct, at least for some systems - other heat pumps may/will vary, but on a Midea setup, the secondary pump i...

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

@derek-m - I think we need to consider whether there is a heat exchanger or not, and if so, which pump we are talking about. In my case there is, and ...

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

@bob77 - with the caveat that I have a heat exchanger, and so a primary and secondary pump - it does look like the secondary pump runs continuously wh...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

Here we go, data from the last few hours since I added compressor frequency to the data, as it happens a period of relative stability in OAT, though i...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

I'm already doing that, and most of the time it works, but I still have to iron out a bug, running my hourly auto-adaption script, which varies the LW...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

@mikefl - a useful comparison, even if it is, I agree, a rather busy chart! There is a more marked spike, but there is also a notable dip after the sp...

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

That's by intention, achieved by using the room stat timer as an on/off switch, by setting it to 12 degrees for off, 26 degrees for on. I could do the...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

I'm sorry, but I don't have a lot of time for those emoncms how not to do a chart charts. There is no legend, meaning there is no way of knowing what ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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