In case the temperature see-saws around 26 degrees, as mentioned in the example, it will result in the Furnace and the Heat Pump alternately switching on and off with each see-saw.
2) So, perhaps, it would be better to have a setting like :
(say) at (external temperature of) 25 degrees the furnace switches on, and continues to be on till (the external temperature is) (say) 30 degrees,
and once 30 degrees is reached, the heat pump switches on, and stays on till (the external temperature falls to) 25 degrees and so on ?
3) That would prevent oscillations (so to say) around 26 or 25 degrees.
4) It is likely that this does not apply, or has been thought about and worked around, as the manufacturers are sure to have taken measures against it, if it were to apply.
5) Still, something to think about, in my opinion.
That's a good point, Sekhar, but I think the manufacturer has it covered. The options for the trigger points are in 5 degree increments and I think it actually behaves in a manner like the scenario you listed. My explanation sort of over-simplified things and I think your more detailed thought experiment is closer to the actual behaviour of the system.
1) A stray and puzzling thought :
ReplyDeleteIn case the temperature see-saws around 26 degrees, as mentioned in the example, it will result in the Furnace and the Heat Pump alternately switching on and off with each see-saw.
2) So, perhaps, it would be better to have a setting like :
(say) at (external temperature of) 25 degrees the furnace switches on, and continues to be on till (the external temperature is) (say) 30 degrees,
and once 30 degrees is reached, the heat pump switches on, and stays on till (the external temperature falls to) 25 degrees and so on ?
3) That would prevent oscillations (so to say) around 26 or 25 degrees.
4) It is likely that this does not apply, or has been thought about and worked around, as the manufacturers are sure to have taken measures against it, if it were to apply.
5) Still, something to think about, in my opinion.
Regards,
Sekhar
That's a good point, Sekhar, but I think the manufacturer has it covered. The options for the trigger points are in 5 degree increments and I think it actually behaves in a manner like the scenario you listed. My explanation sort of over-simplified things and I think your more detailed thought experiment is closer to the actual behaviour of the system.
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