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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Nov 15, 2025
Profile Activity
Topics: 17 / Replies: 2348
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RE: Defrost Cycles - How Common Are They?

@toodles - yes, that makes sense, though I can't see the LWT magenta line poking out from the bottom of the fourth defrost in your latest chart. It ma...

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

@scrchngwsl - thanks, though I will need to put my thinking cap on to get my head round that lot! I have thought about how to do this a few time...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost Cycles - How Common Are They?

I think they are there. I have marked them with blue crosses: The key mark of a defrost is the LWT (flow temp) falls below the RWT (return tem...

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

Thanks for the kind thoughts. At least it is sunny as well as less humid, and the cold won't last forever.

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

The dates and times were in the post with the charts. The 1.18 factor was a guaverage, a portmanteau word. As I have pointed out before, I have lim...

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

Agreed, I went through the Midea manuals and could not find anything. But I am not sure it matters that much. We have the compressor kWh in which you ...

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

@derek-m - you have made three requests for data all within three hours, one at 8 pm, another just one hour later at 9:01 pm and then this rather petu...

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

Yes, to keep you on your toes 😉 Seriously, though, usually there is a reason, this time it is because the daily meter readings were taken at 0700.

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

I've had another look at the data and found the only series where I read the external meter of a daily basis. It is a short run, for the period 0700 o...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost Cycles - How Common Are They?

@toodles - interestingly, that plot looks like a plotly/python plot, which is what I use. I don't normally include the top right icons, but I do inclu...

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

Method note (only of interest if you are interested in the code): I have sorted out the split regression line in the polynomial plot, using sort (sic)...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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