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Setback savings - fact or fiction?

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JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 4868
 

Posted by: @cathoderay

Here is the IAT vs OAT plot with regression lines for each of the four data sets added. I have done them as two plots (one for am, 0900, and one for pm, 2100) because putting them all on one gets far too busy. The regression lines are simple linear ones, y = a +b(x), not polynomial:

 

image

Great.  I will try to zoom in to work out the deltas between the two lines unless you have an easy way to do that (which would be helpful).  The 9pm one (which is arguably the more important) looks like a degree or maybe a bit less?  I think @robs has a point about looking also earlier in the evening, although I would have hoped it was pretty stably by 4pm given your setback was 12hrs earlier.

Posted by: @cathoderay

Weather compensation plus my auto-adapt script, which temporarily moves the WCC up or down when the IAT is higher or lower than it should be. The IAT check and WCC adjustment if needed is done hourly, and the increments are one degree ie IAT one degree under, WCC goes one degree up etc, up to a maximum of three degrees either way. The recovery periods will thus be boosted by the auto-adapt script, depending on how far the IAT has dropped during the setback.

Thanks, thats clear.

 


This post was modified 51 minutes ago 2 times by JamesPa
This post was modified 50 minutes ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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