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18%ish in the UK, I guess with it being a small distance in-between places.
Actually, heat pumps generate 2-5 times as much heat as the electrical energy is used, and electric cars are much more efficient as well, so yes, overall energy use is indeed set to plummet. That's the whole point.
.Quote18%ish in the UK, I guess with it being a small distance in-between places.If you mean: "Costs for the transmission and distribution of electricity typically account for 16-20% of the typical domestic electricity bill." that's not the same thing as efficiency.
This difference in the generated and distributed units is known as Transmission and Distribution loss. Transmission and Distribution loss are the amounts that are not paid for by users
For the foreseeable future, it will be about the same for electric cars - the prime mover just happens to be somewhere else, polluting the upper atmosphere.
Quote from: wolfekeeper on 09/05/2021 04:31:46Actually, heat pumps generate 2-5 times as much heat as the electrical energy is used, and electric cars are much more efficient as well, so yes, overall energy use is indeed set to plummet. That's the whole point.For the heat pump, do you have any real world experience from anyone for the 2 to 500percent efficiency? From what I have read it comes in at about 200 over the year. Problem is that at times when heating is most required during the winter the efficiencies are lower. Who needs central heating when it's 35 decrees C out side! I think the whole point is something like the heat exchanger for air changes, if your house is airtight enough you can save something like 90 percent of costs.
Fossil fuels decreased by 42%; Gas increased by 38%
Quote from: Guardian Graph, linked by bored chemistFossil fuels decreased by 42%; Gas increased by 38%I'm not quite sure how to interpret these two lines in the graph...- Last time I checked, Gas was a fossil fuel (unless UK is using a very different gas than Australia...)
Years ago I built three clinics around the most sophisticated MRI machines on the market. Not a hint of trouble from the capital machinery, or the kitchen fridges, but in 10 years we never had the entire cooling and aircon systems all working properly at the same time.
Quote from: alancalverd on 09/05/2021 23:43:08Years ago I built three clinics around the most sophisticated MRI machines on the market. Not a hint of trouble from the capital machinery, or the kitchen fridges, but in 10 years we never had the entire cooling and aircon systems all working properly at the same time.I can't speak to the (un)reliability of the particular brand of equipment that was installed.
To compare to other "systems"Say you have a heat pump rated at COP = 2.5 (maximum permitted under SAP)Outside temperature 1C (so the heat pump may avoid frost), inside 21Cinstantaneous heating by 20CHRV providing 0.35 ach (volume of air is 202m3)Energy recovered 293W (o.35x0.33x volumex63%x20C)energy used 10WCOP = 29.3 (2930%)This is a strong indication that it is far far easier to save energy than it is to produce
Actually, heat pumps generate 2-5 times as much heat as the electrical energy is used, and electric cars are much more efficient as well, so yes, overall energy use is indeed set to plummet. That's the whole point.Quote18%ish in the UK, I guess with it being a small distance in-between places.If you mean: "Costs for the transmission and distribution of electricity typically account for 16-20% of the typical domestic electricity bill." that's not the same thing as efficiency.
Cost and energy aren't the same thing.
Wind blows stronger in winter, and less in summer, and blows at night.
Not true. "Surface" wind (anything below 1000 ft above local surface, i.e. the stuff that makes electricity) ) is strongly influenced by convective mixing, which is maximum when the sun shines.
Quote from: wolfekeeper on 17/05/2021 22:14:46Wind blows stronger in winter, and less in summer, and blows at night. Not true. "Surface" wind (anything below 1000 ft above local surface, i.e. the stuff that makes electricity) ) is strongly influenced by convective mixing, which is maximum when the sun shines. Persistent winter fog in the UK is due to the arctic anticyclone, with very little wind - and maximum electricity demand..