[LargoLasskhyfv]

> Heathrow is massive and uses a lot of power (1-2MWh/day).

That number doesn't seem that high, compared to a single high-speed train running at about 300kph or above. Or lets say all of the London Tube/DLR.

Seems like nothing, actually.

[oliwarner]

Yup I think I missed a comma when originally reading the sustainability report. They buy-in an average of 747 MWh a day (2022).

The point I was stumbling to try and make was that Heathrow is dense. Just under a GWh a day delivered to a 1200ha site isn't going to get a natural diversity of supply, especially compared to a rail system does.

[p1mrx]

Yeah, that can't be right. You can tow a 100 kW generator (2.4 MWh/day) with a pickup truck.

[zimpenfish]

[0] suggests (without a useful link and my searching has not found one) that Heathrow is doing 460GWh annually. Presumably[1] that equates to 1.25GWh daily (which could be where the 1-2MWh/day came from - a simple unit error)?

[0] https://www.bloomberg.com/opinion/articles/2025-03-21/heathr...

[1] I know precisely nothing about power consumption of large systems but dividing the annual figure by 365 seems plausible.