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william1066
@william1066
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Joined: Jan 5, 2023
Last seen: Feb 13, 2024
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Topics: 0 / Replies: 206
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RE: Heat pump delta T too low - 2c

@scrchngwsl I don't know the accuracy of the temp sensor in my pump. Assuming it is precise, but not accurate, and we are only interested in th...

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

A 0.25 difference in dT @30 lpm will be a 0.5 kW difference, which over a day is 12kW. The question is, how do you know dT is not changing?

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Low COP on Samsung 16kw Gen6

@catapult We have pretty much the same setup as you, (Samsung Gen6 16kW, a house where we measure heat loss of the walls/windows via wind chill factor...

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

@iancalderbank What about oxygen ingress. I have tried to keep plastic out of the system as far as possible. Right now, only the Sika flow meter is ...

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

@heacol Hi Brendon - Do you have any experience with this filter? That is my current choice for replacement of existing one. At 45 lpm is 1 mh2o.

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

@iancalderbank The way I read the chart is that to get 30 lpm you will lose 4 mh2o across the biggest valve in that list, that is quite a lot. I am a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Our Grant Aerona R32 13kW ASHP installation

@marvinator80 I was going to say see page two of the following guide, but of course you have not changed anything internally. For me the main diff...

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

Interesting, I may need to do the same. I am almost at the 1 month point since switching on my ASHP. There has been some mention on this site ab...

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

There is quite a lot of thermal inertia in the concrete, so I really need to get the outside temperature and concrete temperature into the data set an...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

It is until you discover things like Frigate and think, that would be nice, then find you need more disk and maybe even coral ai. Also if you really...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Our Grant Aerona R32 13kW ASHP installation

@marvinator80 Excellent, keep us updated, which I am sure you will, looking forward to seeing how you get through the "burn in/nurturing phase"

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Install a Grant Aerona 13kW instead of Mitsubishi Ecodan 11.2kW?

Make sure you do all your resistance calculations. I put mine behind a wall in the garden, so needed 20x2 (flow/return) meters of underground pipe. ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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