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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4403
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RE: Heat pump delta T too low - 2c

I suppose that 'head' is relative, since the pump will have to work to 'pull' the water up the 3.5 metres. If you don't have more than the specified...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

You are perfectly correct that there are many systems designed and installed by people who I would politely describe as 'idiots', and should have done...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

Whilst the information in the table may be factually correct, I wonder what size the heat emitters would have to be to dissipate even 14kW of heat ene...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

If you have a vertical pipe approximately 10 metres in length and fill it with water, the pressure at the lower end of the pipe will be approximately ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

The DeltaT is primarily dependent upon the water flow rate, the higher the flow rate, the lower the DeltaT. I am not that familiar with the Daikin e...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Renters and batteries

One of the things that your friend could consider is a portable type of battery storage as used with RV's and campers. Much depends upon how much el...

3 years ago
Forum
Energy Storage
Reply
RE: Connecting to Midea MSmartHome using a PC

From what I can see in the midea_ac_lan code, the order of the message body is set by the request routine, so the decipher routine needs to use the sa...

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

@cathoderay I have just realised that I did not add your testvar's to the code since I don't know what modifications you have carried out on your sy...

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

@cathoderay Can you post the 'message body' so that I can try to analyse the data. It may be that HA does not know how to interpret the data.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

As you have stated, the weather is quite mild at the moment, so assuming that the heat loss calculation of 6.5kW is reasonably accurate, you could exp...

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

Hi CathodeRay, I suspect that the hourly transmission will be initiated by the Midea equipment, while the 1 minute request is probably initiated by ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Tariff: Octopus Flux

@transparent Do you think that they would allow me to bypass my meter, so that I can 'responsibly import' energy to counteract and balance the effec...

3 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
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