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RobS

@robs

Member

Estimable Member

Joined: Oct 15, 2024
Last seen: May 5, 2026

Topics: 0 / Replies: 128

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RE: Setback savings - fact or fiction?

Hi @cathoderay If it helps any here's this period with recorded numbers: The off period is 1h22m and the on period is 2h44m, the system's steady ...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

No worries! The WC curve is setup for our usual 20-21C IAT so that's what the heat pump is trying to achieve, but the "thermostat" is set lower and so...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

@cathoderay As I wrote above, it's a "non-defrost restart", so it won't look like a typical defrost. The peak flow temp is only 28.5C and the CO...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

In the context of the described time periods yes but not the conclusion of the analysis, which is more important. During the defrost less electricity ...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

@sunandair I haven't made any claims of saving energy, @cathoderay has so maybe you are confusing the two of us? My analysis showed that a small ad...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

I was merely curious as to the resolution of the data used by the Midea control algorithm and the resolution of its outputs. Given that...

3 months ago

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Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

This part of our conversation started with a Samsung but no matter. My question regarding whole (integer) degree changes was because our Mitsubishi OA...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

The Met Office API being used seems to have OATs to one decimal place. The system in question was a Samsung and not a Midea, but does your Midea WC cu...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

The OAT in the above is from a Mett Office API and representative rather than the actual OAT, hence the staggered rise in temperature - the real OAT d...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

I covered the energy flows, with the numbers, in great detail in . The energy used by the defrost (and the energy not delivered to the house during th...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

Yes, here's the Samsung zoomed out: If the OAT is rising then less heat will be lost by the property and hence during the recovery less h...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Setback savings - fact or fiction?

Exactly, it's just lag in the system.

3 months ago

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