321
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 11 Mar 2024
321 points (99.1% liked)
Climate - truthful information about climate, related activism and politics.
5237 readers
469 users here now
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
founded 1 year ago
MODERATORS
Definitely, that's why I say the seasonal heating efficiency is based on heating-degree-days of the location. I'm not sure they'd get to 2-4x 200% efficient, though. 350% might be more reasonable.
It gets hard to say because COP varies with climate. But even in SEER ratings, 17-20 are pretty much the norm for modern systems and I have seen as high as 23. That translates to a 4-4.5 COP in an average climate.
But those COPs get higher the more mild your climate -- I am somewhere with quite mild winter where we only get a hard freeze once or maybe twice a year, and generally winter low temps are in the 40-50F range.
I believe the theoretical max efficiency for a heat pump is something like 8.8 COP. In a mild climate like mine, where most of the time if your heat is running it's to heat to ~70ish from an ~50ish outdoor temp, you're should be getting a lot closer to 7 than you are to 2.
I'm pleasantly surprised. Right, sometimes I forget that most people don't live in a deep freeze like Saskatchewan.