Improve efficiency: Turn the heat pump off

[MyForest (David Bowen)]

@Rachel

the cascade loop would be slowly integrating an increase

@Rachel you might enjoy this bit where we chatted about using an accumulator in a similar fashion.

@Rachel

But that can’t cope with the opposite problem I have on windy days!

I have a sort of magic solution for that which might help you, I use the effective temperature for my weather compensation so it takes into account the wind cooling my house down:

Improve efficiency: Weather compensation based on effective temperature

As we all know, heat pumps are more efficient when the flow temperature is low. I’m running a large heat pump with over-sized radiators in a 200-year old house. A common feature of modern heat pumps is weather compensation. Often this will be a “curve” which provides a high flow temperature when it’s cold outside and a lower flow temperature when it’s warmer outside. Some even have multiple points on the curve so it’s not linear! My control algorithm uses a simple straight line at the moment. …