Earth Notes: On Website Technicals (2025-01)

Preparing for the Thermino to be plumbed in again, I have a new script:

% sh script/myenergi/eddiSetHeaterPri-netrc.sh 2
{"hpri":2,"cpm":15}

The first argument is the Eddi heater priority, which applies when automatically diverting PV output. The DHW tank is 1, the Thermino will be 2. The default is 1.

If there has been a recent pasteurisation cycle then this shall be set to 2, since the Thermino will leak heat more slowly than the DHW tank.

I will only send the priority at times when I would consider running a cycle so as to slightly reduce load on the Eddi servers.

I have looked at the latest (2023) full-year average grid carbon intensities for the other ends of the GB electricity interconnectors at Electricity Maps [EMdata].

They do not look sufficiently different to me to warrant an in-year update now, which would make numbers for January up to now difficult to recreate. I have put the 2023 figures in for 2026 onwards to automatically roll in. But in February when 2024 averages should be available I will probably update the 2026 figures to be those. I have added a repeating calendar reminder every February to look for new yearly figures to use, likely from Electricity Map.

I have also noted in the intensity page that Electricity Map data is used, under a Open Database License (ODbL) licence, and added that licence to the known set for the bibliography.

Current 2022 country averages, being used for 2024/2025:

# DHD20231228: Electricity Maps / ENTSO-E 2022 whole-country intensity figures.
# Interconnectors to BE (NEM), DK (VKL), FR (IFA, IFA2, ELEC), IE (IRL, EW), NL (NED), NO (NSL).
# BE 2022 mean 0.123: Electricity Maps / ENTSO-E.
# DK 2022 mean 0.126: Electricity Maps / ENTSO-E.
# FR 2022 mean 0.062: Electricity Maps / ENTSO-E.
# IE 2022 mean 0.288: Electricity Maps / ENTSO-E.
# NL 2022 mean 0.262: Electricity Maps / ENTSO-E.
# NO 2022 mean 0.012: Electricity Maps / ENTSO-E.

2023 country averages, currently scheduled to be used from 2026:

# BE 2023 mean 0.126: Electricity Maps / ENTSO-E.
# DK 2023 mean 0.098: Electricity Maps / ENTSO-E.
# FR 2023 mean 0.040: Electricity Maps / ENTSO-E.
# IE 2023 mean 0.312: Electricity Maps / ENTSO-E.
# NL 2023 mean 0.226: Electricity Maps / ENTSO-E.
# NO 2023 mean 0.010: Electricity Maps / ENTSO-E.

Other than IE (Ireland) and BE (Belgium), intensities have dropped. GB does not import much from IE. BE has gone up ~3%, so in the noise margin. Retaining the older higher values this year is thus slightly conservative.