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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 12, 2025
Profile Activity
Topics: 17 / Replies: 2130
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RE: Do setbacks save energy without compromising comfort?

The latest analysis by @jamespa of my Midea data (see recent posts in this thread) suggests the savings may be higher, around 20%, for a six hour over...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

It isn't 'very simple', but for systems that have a modbus interface, it is very possible to get a lot of data. Here is the last two days data from my...

2 years ago
Forum
Introductions, Forum Rules & Updates
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RE: Do setbacks save energy without compromising comfort?

@jamespa - I am continuing to collect data, which will only apply to my compromised ungeneralisable setup in the conditions in which it was collected,...

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

@kev-m - I think you may be onto something, an average hiding detail. Here's a zoom in on three defrosts over a two hour period on a recent cold morni...

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

I have not taken it as a personal attack on me, instead I am trying emphatically to say that constantly pointing out the obvious increases the noise a...

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

@jamespa - interesting. The confidence interval overlap is indeed very small, and may or may not disappear with larger sample sizes. At the moment the...

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

I do of course by and large agree, much (but definitely not all, by a long shot) is relevant, because it turns out that to answer the original questio...

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

I agree, and every now and then I as the thread starter try to remind folks what this thread is actually meant to be about (eg an hour or so ago I wro...

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

@ The string 'defrost' does not appear to exist in the Midea Engineering Data manual. I have plotted the 'norm' power outputs over the range of OATs...

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

At the moment, it seems to me there is not enough second thoughts going on, and instead there is a lot of noise repeating stuff we already know - in s...

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

As I thought, but that is the least accessible place, and invasive approaches are not an option.

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

DT might actually be the harder one, depending on how and where you measure it (and bearing in mind I have a PHE). The flow rate has two things that m...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 84 / 179
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