Earth Notes: Saving Electricity and Gas (2018)
2018/02: this is the coldest February here at 16WW while I've been monitoring. But we're nowhere near our highest gas use, thanks to insulation and to Radbot/OpenTRV!
2018/05/07: on the hottest day over the Early May Bank Holiday weekend (ie since 1978) it is ~27°C in our shaded porch. A snapshot of heating performance c/o Pilio shows R^2=0.94 and a slope of ~2kWh/HDD (at 15.5°C baseline).
|Month||Consumed kWh (/d)||Generated -kWh (/d)||Consumed kWh (/d)||Period||Notes|
|2018/01||214 (6.9/d)||-62 (-2.0/d)||585 (19/d)||20171231-18:45-GMT to 20180131-19:19-GMT (31d)||Meter readings: electricity generation 61.9kWh, export 35.3kWh, import 187.1kWh (thus net consumption (I+G-E) 213.5kWh); gas ~52.7m^3 (so 585kWh @ 11.1kWh/m^3).|
"SmartThings" sensors to cross-calibrate OpenTRV devices draw ~10W, thus add ~0.25kWh/d to gross electricity consumption.
HDD12=166 vs 248 last January.
|2018/02||186 (6.6/d)||-104 (-3.7/d)||746 (28/d)||20180131-19:19-GMT to 20180228-18:32-GMT (28d)||Meter readings: electricity generation 146.6kWh, export 104.4kWh, import 143.8kWh (thus net consumption (I+G-E) 186.0kWh); gas ~67.2m^3 (so 746kWh @ 11.1kWh/m^3).|
This has been the coldest February (in terms of HDD) that I have observed at 16WW.
HDD12=237 vs 139 last February.
|2018/03||190 (6.1/d)||-216 (-7.0/d)||559 (18/d)||20180228-18:32-GMT to 20180331-17:10-GMT (31d)||Meter readings: electricity generation 216.4kWh, export 167.3kWh, import 141.0kWh (thus net consumption (I+G-E) 190.1kWh); gas ~50.4m^3 (so 559kWh @ 11.1kWh/m^3).|
A cold March, but not quite the coldest measured here!
HDD12=185 vs 77 last March.
|2018/04||93 (3.1/d)||-290 (-9.7/d)||137 (4.6/d)||20180331-17:10-GMT to 20180430-17:06-GMT (30d)||Meter readings: electricity generation 290.4kWh, export 284.9kWh, import 87.6kWh (thus net consumption (I+G-E) 93.1kWh); gas ~12.3m^3 (so 137kWh @ 11.1kWh/m^3).|
HDD12=64 vs 65 last April.