SteamyTea

Right, let us say you need 40 kWh (not kwh) a day. Let us also assume you get a heat pump with a CoP of 2.5 (though you would be better off with an A2AHP). So you ned to generate 16 kWh/day. A 1 kWp array, hanging on a south facing wall, will, on average, in December, produce 40 kWh. So 1.3 kWh/day. That implies you need a 12.5 kWp system. Now you need to give yourself a bit of head room, so a 16 kWp system should do it. General rule of thumb about storage is a third of the array size, so 5 to 6 kWh of battery storage. That may be reduced a bit if you can store more thermally, say in a couple of 300 lt cylinders. It is a lot, but not a huge amount. About 80 m2, 16 m by 5 m.

I have pondered this every now and again. My car windows and doors stay sealed with windspeeds of over 100 MPH running past them. I get similar windspeeds hitting my house, but the air comes in. I open and close my car door much more often. My car also has electric opening and closing windows.

Strong pornography in the glove box?

What will happen if the price of wind (and solar) energy is reduced to close to gas prices though legislation. RE companies are riding high at the moment because they were given a good deal a few years back. Those deals are now stopped and the legacy deals are coming to an end in the next decade. There may be a reason they are chasing small investors rather than the large institutional investors who know the industry very well.

kWh

How many kWh/day of thermal energy do you really need?

I do as well. Best you can hope for is to reduce losses from the building. So extra insulation on the colder North and East sides, floors and ceilings/roof. Find the best price you can export PV at, some say they are getting 7.5p/kWh and maximize your revenue. Use that to offset winter costs.

No it don't. What is known though is the geometry, this is unaffected by cloud cover. So changing the array to be almost vertical and south facing helps a fair amount (change the slope in PVGIS and see what you can get). What is also known us where the sun will be during the hours of daylight, so it become easy to know when a heavier load can be applied. The times that lower output happen i.e. 8:30 to 10:30 and 14:30 to 16:30 are the times to top up the batteries. The idea if the batteries is to overcome the higher start up current of a heat pump, not to run anything long-term i.e. resistance heaters. The idea is similar to a hybrid car, use stored power to overcome short spells of high power.

Only once it has gone past the store temperature. This means it can loose our a lot of the time. Generally at sub 100W/m², PV is more effective, and cheaper.

How about a storage heater. If you have a ToU tariff, could work out very cheap.

Right, rather than trying to store energy at elevated temperatures, for months why not just use a heat pump. Then all you need to work out is the power needed to run it, and your potential to generate that power. PVGIS will be your friend here.

Replace that window with a foot of insulation.

No cadavers is the fridge tonight then. Is that the clocks you have gotten from us all for @ProDave's retirement?

They are a marvel, pizza bases are fire proof too.

I did, only after I got ripped off again, even after mentioning that the last one was lacking. Think that is a cafe that will be struck off the list. They can't even make the simplest coffee there is without (expletive deleted)ing it up. The girl even said "come back if you need it topped up'. FFS .

Rather than look at how much energy can be stored, look at how much energy will be lost, and how much insulation is needed to reduce those losses. Also look up Newtons Law of Cooling.

Did I not post up about this a while back? JANUARY SALE Menu Heat pump uses a loudspeaker and wet strips of paper to cool air A prototype heat pump that uses water and sound to cool is three times as efficient as previous comparable designs TECHNOLOGY 6 December 2022 By Karmela Padavic-Callaghan A new type of heat pump can match current air conditioning systems in terms of efficiency Shutterstock/Richard Peterson A heat pump that uses sound to cool is three times as efficient as previous designs. Heat pumps cool buildings by removing heat from the inside and pushing it outside, like a refrigerator. But unlike a refrigerator, they can also heat an enclosed area by reversing the process. To top it off, heat pumps are typically more efficient than conventional heating and cooling devices. Guy Ramon at Technion-Israel Institute of Technology in Haifa and … Continue reading Subscribe today in our January Sale VIEW JANUARY SALE OFFERS No commitment, cancel anytime* Offer ends 14th March 2023. *Cancel anytime within 14 days of payment to receive a refund on unserved issues. Existing subscribers, please log in with your email address to link your account access. Advertisement TRENDINGLATESTVIDEOFREE Strangely strong interstellar meteorites may come from supernovae Why we probably won't get new covid-19 vaccines in 2023 Largest ever animal may have been Triassic ichthyosaur super-predator The world's ultimate X-ray machine will start up in 2023 The best science fiction books out in 2023 MORE FROM NEW SCIENTIST The best popular science books out in 2023 Discover a quantum world of numbers, the amazing new science of the human electrome and long views of Earth and its wonders in this look at the best non-fiction coming this year HUMANS 2023 could mark a turning point for the Amazon rainforest New political leaders in Brazil and Colombia have promised to protect the rainforest, raising hopes of saving the ecosystem from becoming savannah ENVIRONMENT A factory will soon start making green food from air and electricity Solar Foods will grow bacteria using carbon dioxide from the air and hydrogen produced by renewable energy, a process more efficient than growing plants ENVIRONMENT Bird flu vaccination may be the only way to have free-range chickens Tens of millions of poultry are being kept indoors or have been slaughtered because of avian influenza. Without widespread vaccination of birds, free-range chickens and eggs could be off the menu forever in some countries LIFE The real reason people talk over you, and what to do about it Android Users Don't Forget To Do This Before MondaySecurity Savers Online Does anything actually cure hiccups? (Part 2) Your chance to win this £3m London town house plus £100k cash. Enter the Omaze Draw now.Omaze Urologist: Do this once a day to shrink enlarged prostate glandProstate Revelation Sign up to our newsletters Enter your email address to get started Subscriber benefits Contact us Help About us Privacy policy Cookie policy Terms & conditions Advertise Write for us Events Press Room Science jobs Syndication RSS feeds Gift subscriptions Student subscriptions Group subscriptions MANAGE PREFERENCES GET THE APP FOLLOW US © Copyright New Scientist Ltd.

Mousehole is hardly urban.

And lots of mopping up.

£100 buys a 1.2 kWh leisure battery. £20 an inverter and about the same for a mains charger. What is the aim here?

Mousehole in Cornwall. 2700 miles of nothing to the west. Then this. This only shows 4, but counted 7 so far. At least these ones are visible.

Depends on the pressure. The SHC is better than sand at 1kJ/kg.K. A m³ at sea level has a density of about 1.2 kg/m². Double the pressure, halve the volume.

I am sure I would quite like heroin, not sure I should try it, I have seen what it has done to my neighbour.

Lots of Thermos flasks. Aerogel is 0.013 W/m.K

You could compress air, which will warm up with entropy and then add in extra energy with an element. Then release it back.