News for hackers. Stuff that matters.

A comment on SEC charges Nvidia with inadequate disclosures about impact of cryptomining. Parent comment

Re:SEC charges Nvidia with inadequate disclosures about impa... by fpoling on Tuesday May 17, 2022 @01:00PM (#31413498)
A good oil-burning heater has over 90% efficiency. Even no so good and cheap one can get over 70%. The best industrial electricity-generating plants that runs on oil has efficiency bellow 60%.
[ Parent | on HN ]
Re:SEC charges Nvidia with inadequate disclosures about impa... by sandworm101 on Tuesday May 17, 2022 @02:23PM (#31414547)
Does that oil-burning heater need oxygen? If it does then it needs ventilation, air movement in/out of the house, pushing that 90% efficiency number way down.
[ Parent | on HN ]
Re:SEC charges Nvidia with inadequate disclosures about impa... by 8note on Tuesday May 17, 2022 @03:38PM (#31415399)
Tech connections has what you're looking for: https://youtu.be/lBVvnDfW2Xo

Efficiency wise, the comparison between a heat pump and a furnace depends on the outside temperature. Heat pumps lose their efficiency for high ∆T, so for winter in a Russia, a furnace is likely the better option

[ Parent | on HN ]
Re:SEC charges Nvidia with inadequate disclosures about impa... by fpoling on Thursday May 19, 2022 @03:54AM (#31431908)
90% is overtall efficiency including losses due to ventilation. Such system with its heat exchangers is not cheap, but long term it pays off compared with less advanced heater.
[ Parent | on HN ]