SteamyTea

If it is used for load balancing, then peak power can be useful measure. They could just put in both quantities i.e 1 GW, 300 MWh.

Without checking I think it is for coulomb, hence the capital C. A coulomb is an amp.second.

The problem is, we need to sequester the excess atmospheric CO2 levels (from about 422ppm today down to about 300ppm) as well as deal with the excess ocean/lakes and rivers acidification. The UK uses about 130 MTOE (1,511,900,000 MWh) each year (2020 numbers for total UK energy). That is a mean power requirement of 1,725,913 MW, or 1,729 GW. As an example, a large nuclear reactor can deliver 1.5 GW, so we would need 1,200 of them. As demand fluctuates between by a factor of 3 during the year, we would need storage of approximately 15,768,000 MWh, or 16,000 GWh to smooth of those fluctuations. Taking a best case of 50 kg CO2/kWh for a battery manufacture, and 10,000 charge cycles, that is 5 gCO2/kWH or 5 tonneCO2/GWh. 80,000 extra tonnes of CO2 added to the environment. Now my car has emissions of 185 gCO2/mile (ish). So that 80,000 kg extra tonnes of CO2 is equivalent to 432 million miles. About 1% of the mileage of my last two cars over 12 years. So I don't think we have to worry about the CO2 from batteries even of we have to replace them every 10,000 charges.

Why do they not mention the storage capacity in the article. It is all very well having x amount of GW, but for how long.

About 10% of the mass when freshly harvested. The embodied energy will be about 0.2% if the solar irradiance for where it was grown.

VisiCalc on a PET for me.

It is 40 years old now. I have swapped it for a younger model.

Because they use the same data set. https://bmrs.elexon.co.uk/market-index-prices

I think with 7 million houses using, it is going to be a tong time till it goes.

You can get E7 without a working smart meter. Then you can do the heavy work during the night, and rely on the PV generation, plus some high price import during the day. Does your ASHP heat a concrete slab (a storage heater), if not, then the savings may not be worth it.

Just did a test with my software, it is really easy to get the info. Gives loads of other options as well. Here is the Windows right click options. No option to copy the info.

My Mother had a Harvey softener (well 2 over 33 years). Was pretty good considering the chalky water in Bucks.

That is probably the invert/charge efficiency and some residual energy left in the battery. Worth doing this eery month and see what the trend is. I actually think that 70% (ish) is not too bad for a low entropy system.

There are Android apps that can read the EXIF data, and probably copy it into a document.

That is the bit I have not found a good report on.

Because of the way the ions have to find free places in the chemical matrix. Think of it as an empty car park. It is easy for cars to park at first, but gets progressively harder, the more cars there are in there. A degraded battery will have the same amount of ions to move, just less places for them to go, the charging will therefore just keep moving them about, which makes the battery warmer.

I still want to know about charging partly degraded batteries. Say a 1 kWh battery has degraded to 0.8 kWh, I assume that it still takes just a bit more than 1 kWh to recharge it, say 1.05 kWh, but can only deliver 0.8 kWh. Has anyone got any data on this, or willing to put an input and output meter on their system.

I use IrfanView for simple picture editing, you can edit the EXIF information which is where the geotagging data is kept. Actually, thinking about it, on a PC, if you right click on the image file and select Properties, I think the geotag is there.

You can get generation data from here, but you then have to work out the CO2e multipliers. But as I mentioned, you have to take into account marginal generation supply/demand. You can start here.

Good result.

Which is inside a semi infinite heat sink. Sounds like you actually do a room by room calculation, but then fudge it at the end.

Have you done a condensation risk analysis. Generally more insulation is better, but below U = 0.1, there is not a great deal to be gained.

So how do you size the thermal emitters? And take into account differing window sizes.

Well 7 million houses are on E7. But I agree. We have been told for a decade that ToU tariffs are coming, but all we get is a mishmash un-undetstable ones. It is probably worth designing to have a house that can be heated for a day, in a 4 hour window though. PV can deliver quite well 2 hours either side of local noon.

Does it though. You can space the pipes closer and oversized the HP a bit. Just a case looking at all the charts and seeing what falls out.