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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Oct 14, 2026
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Topics: 18 / Replies: 3071
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RE: Maintaining temperature on windy day

I used to, but now I am retired. Mostly I miss doing them, but I will never forget a GP trainee in a rough neighbourhood telling me the trainee on a t...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Maintaining temperature on windy day

@jamespa — now that you have done some add on apology, honour is restored.

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Maintaining temperature on windy day

"done some add on control"??? It's a most elegant solution, might I remind you! Seriously, it is not complicated, and uses the indoor air temperatur...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Defrost behaviours

Thank you! I use plotly in python, with the data coming from csv files. If you are already familiar with python, you will find it a doddle, if you a...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

Apologies, I was being lazy, the answers to some of my questions are already in the thread: 9.9kw loss at -2, 10kW heat pump. But the supplementary qu...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

As @jamespa says, there is some sort of limitation, or rather imbalance. The difference between the set flow temp and actual flow temp isn't trivial, ...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

Which means the actual flow temp will be less than the set flow temp, and it is was probably also the case in the previous image. You need to catch it...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

Does that image show a target flow temp of 49°, and a current flow temp of 33°C (the images are rather blurred). If so, and it is not in the deep trou...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

I think just a few readings would be useful. Try to pick a time when the OAT is low, and do the same again when it is higher, and you have two points ...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

I think that is an important step, to narrow down where the problem lies, even if you need to do it manually. PS didn't mean to rattle off a lot of ...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: 10kw heat pump run in 24*7 data?

There are still things that don't stack up in this chart (reproduced to avoid the need for page hopping):     Why does the power dro...

11 months ago
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Air Source Heat Pumps (ASHPs)
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