3 ms·

House heating tends to have controls from thermostats or other devices; I'd tend to look to them for grid-related time-shifting. I did run across a release on

House heating tends to have controls from thermostats or other devices; I'd tend to look to them for grid-related time-shifting. I did run across a release on a new generation of a heat-pump hot-water heater, which does seem to have some kind of grid-shifting built in. A. O. Smith's Voltex AL, https://cleantechnica.com/2022/12/21/all-i-want-for-christmas-is-a-new-voltex-al-heat-pump-water-heater/amp/ https://cleantechnica.com/2022/12/21/all-i-want-for-christma...

PreInternet01 4y ago
> House heating tends to have controls from thermostats or other devices; I'd tend to look to them for grid-related time-shifting Not for heat pumps. In a typical configuration (large heat reservoirs combined with under-floor heating in a well-insulated house), temperature-setpoint changes take 12-24 hours to propagate. So, governing the (in-room) target temperature settings is unreliable/unpredictable. Whereas the in-pump storage temperature is a whole lot more manageable. The old advice "turn your thermostat down at night" therefore also doesn't apply to most heat pump installations -- in fact, it might be disadvantageous. "Select the average temperature you need and don't touch it" is much better advice. Need localized heat/cold? Use another solution for that...
- a9h74j 4y ago
  > don't touch it" is much better advice Saw one heat pump controller discussed which had a curve set for demand vs outside temperature, and the "thermostat" was to set a delta relative to this.