2021-02-24|Sunatori's Énergie effacée

Potential Discovery or Invention

• I signed up for Hydro-Québec's dynamic rate offerings (Rate D with Winter Credit Option) that lower electricity pricing during peak demand events.
  • Peak demand events can take place any day of the week from December 1 to March 31, from 6 to 9 a.m. and from 4 to 8 p.m.
  • There may be 25 to 33 events per winter, at most, for a maximum of 100 hours in all.

• So, I followed Hydro-Québec's recommendations.
  • Modify your thermostat setpoint temperature
  • Use less hot water
  • Limit your use of all nonessential electric appliances

• Here is Hydro-Québec's webpage "Compare rates". Based on their cost estimate, I selected "TARIF D avec option de crédit hivernal".

  

• Here are my Sensi Thermostat settings.

  Auto
  09:00	19 C	25 C
  22:00	17 C	25 C

  Auto (Guest)
  08:00	20 C	24 C
  23:00	18 C	24 C

  Away
  09:00	11 C	27 C
  22:00	11 C	27 C

  Hydro-Québec AM
  04:30	19 C	37 C
  06:00	11 C	37 C
  09:00	19 C	37 C
  22:00	17 C	37 C

  Hydro-Québec AM (Away)
  04:30	17 C	37 C
  06:00	11 C	37 C
  09:00	11 C	37 C
  22:00	11 C	37 C

  Hydro-Québec AM+PM
  04:30	19 C	37 C
  06:00	11 C	37 C
  09:00	19 C	37 C
  14:00	21 C	37 C
  16:00	11 C	37 C
  20:00	19 C	37 C
  22:00	17 C	37 C

  Hydro-Québec AM+PM (Away)
  04:30	17 C	37 C
  06:00	11 C	37 C
  09:00	11 C	37 C
  14:00	19 C	37 C
  16:00	11 C	37 C
  20:00	11 C	37 C
  22:00	11 C	37 C

  Hydro-Québec PM
  09:00	19 C	37 C
  14:00	21 C	37 C
  16:00	11 C	37 C
  20:00	19 C	37 C
  22:00	17 C	37 C

  Hydro-Québec PM (Away)
  09:00	11 C	37 C
  14:00	19 C	37 C
  16:00	11 C	37 C
  20:00	11 C	37 C
  22:00	11 C	37 C

• I pre-heat the house by raising the thermostat setting from 17 C to 21 C for 1-1/2 hours before the AM event, and from 19 C to 21 C for 2 hours before the PM event. The house experiences sudden temperature change from 13-14 C to 19 C after the event. The change, which stresses the central heat pump system, necessitates "Supplemental Heat", i.e., resistance heating.

• Here is typical consumption profile with the thermostat settings and shutting down all possible usage pattern.

  

• Time-shifting heating schedule leads to significant increase in consumption for a few hours, which is still much less than the credit rate. So, it is worthwhile for me to risk being frozen to death at 13 C.

  TARIF DOMESTIQUE D
  RATE D	-$0.09502/kWh
  Crédit hivernal	+$0.50650/kWh

• Significant savings were achieved!

• 2020-2021

  

• 2021-2022

  

• 2022-2023

  

• 2023-2024

  

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"Sunatori, Go Simon" <GS.Sunatori@HyperInfo.CA>

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• 2024-12-17T20:52:49.000Z