Results are in from the last 4 weeks. Last winter the test was also 4 weeks, but with the timer being taken off or on for 1 week at a time. This year I did it for 2 weeks at a time (because I forgot after the first week
).
- Weeks 1-2: 8.097 kWh over 334.2h (timer turns fridge off 0-6am)
- Weeks 3-4: 8.429 kWh over 333.5h (no timer)
Recalculating that, and adding the min/max temps inside the fridge and in the kitchen:
- Timer: 581.5 Wh per 24h, temps: 2.6°/6.7°C and 17.2°/20.9°C
- No timer: 606.5 Wh per 24h, temps: 2.3°/4.4°C and 16.1°/19.4°C
Comparing to
last year's test:
- Turning the refrigerator off for 6 hours at night gave the same 4-5% savings.
- The energy usage is slightly higher than last year, even though I insuated the back of the fridge. This may be because:
- Judging by the min and max temps, the temperature inside the fridge was ~1°C lower, but the kitchen temperature was higher than last year.
- The Wife was home this whole month, so there was more cooking and fridge-opening happening.
- The fridge is a year older...
Not sure how much of a difference this makes for the refrigerator's workings, but it's definately making more noises (hisses, crackling, etc.).
I'll try to continue this test for another 2-4 weeks.