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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 10, 2025
Profile Activity
Topics: 17 / Replies: 2126
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Reply
RE: Measuring your COP

That's not the same thing, as your comment makes clear: the 35, 40, 55 etc are arbitrary vaguely ordinal numbers (could just as easily be 3 4 and 5 or...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

Normally this forum is an excellent example of what a forum (forum: a place where people can exchange opinions and ideas on a particular issue) should...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@julianc - yes, I had all the calculations assumptions etc, room by room and total heat loss at -2 outside/design temps inside, and the problem is tha...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@oswiu - this is something that has come up before (Ecodans having better low temperature performance than Midea units). This is precisely why I sugge...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

I agree. I have previously suggested that as it currently operates, MCS is a waste of space. At the very least, they could add realistic ie cold weath...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Real world COP vs. manufacturer claim

Very good, I think that will be a hard one to beat!

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Connecting to Midea MSmartHome using a PC

Using @derek-m's formula and my numbers for the last hour, I get (23.3 x 60 x 5)/1167 = 5.99kWh, giving a COP of 2.995 (3 decimals places not because ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Connecting to Midea MSmartHome using a PC

Yes, the formula is easy, but the measuring is not! Neither the flow rate not the LWT/RWT are constant, they vary continuously. That said, I have noti...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Connecting to Midea MSmartHome using a PC

@batalto - I agree, I too have noticed the curiously always whole number kWh numbers (the ambient temp does however have decimals). I suspect both the...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Real world COP vs. manufacturer claim

I'm trying to work out the best xxxgate name for this, as in dieselgate. A catchy name will do wonders for publicising the problem. COPgate may be the...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@batalto - thanks very much. I'll post any useful responses here.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@batalto - can you by any chance let me have the email address for MSmartHome Tech Support, or point me to where I can find it (google hasn't been my ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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