SteamyTea

When I don't understand something that I read. I reread it until I do. But if you still don't understand how something can be switched on and off, without pulling it apart, don't touch a light switch or a tap.

The flap is controlled by a bimetallic strip. Too hot, it closes, too cold, it opens. The output knob just mechanically limits the amour it can open. On the bimetallic strip is a resistance heater that warms up when the E7 (or any power) is applied. This closes the flap and reduces losses when they are not needed (not so brilliant for really early risers like me, but lockout timers can easily sort that, or thick pyjamas). Really simple and elegant solution to a problem. If it fails, the heater still works, just takes longer to heat up as losses to the room are higher.

There is a thin layer on the metal panels. Probably asbestos wool on the really old ones from the 1960s. Did you notice the small element on the the flap control to shut it down when charging?

https://www.gov.uk/government/publications/formaldehyde-properties-incident-management-and-toxicology/formaldehyde-general-information Remember that DHMO is deadly. Kills tens of thousands every year.

It is really quite simple. When the storage heater is charging up at night, the flap is automatically closed. When it stops charging up, it opens to the pre set position. The reason this works is because a storage heater is a convection heater i.e. air passes through it. All the flap does is limit, or stop the airflow. Now don't tell me you cannot understand that.

Well gas is about 10p/kWh. So divide the cost of your battery system by 10 (it should last ten years. Then by 5 assuming you need 5 kWh/day out of it. Then divide by the number is of days you want to use it, say 200 a year. Then add the cost of charging, multiplied by 1.3 to the number. If that is less than the gas price, plug in a fan heater. If not, use the gas.

Is that the fetish club you are still allowed into?

Then do as you want to and elicit a challenge the DNO to prove you wrong. Just don't come crying when they tell you to disconnect, and possibly fine you. If you want to play the game, stick to the rules. And wen they are full at about 10 AM in June you are then in effect getting nothing. Fair enough, but I would like to get something for my efforts.

Twice the energy, in the same time, for the same area. Or twice the power for the same area (power is J/s). With heat transfer, area is important. Storage heaters take advantage of this by opening the flap and allowing more air to pass by. This is the same as increasing the area.

Simply, yes, it is in the numbers. Feolite has a SHC 0.92 kJ.kg-1.K-1, k 2.1 W.m-1.K-1 and rho 3900 kg.m-3 Clay brick has a SHC of 0.8 kJ.kg-1.K-1, k of 1.3 W.m-1.K-1 and a rho of 1700 kg.m-3 Thermal Inertia is calculated from the square root of the product of the above three Feolite is 87 kJ.m-2.K-1.s-0.5 Brick is 42 kJ.m-2.K-1.s-0.5 So basically, in the same amount of time, and at the same temperature differences, for the same exposed surface area, Feolite can release (or absorb) twice the amount of energy as ordinary clay brick. But it has a mass of over twice that of clay brick. So building a a house of out Feolite would not really make it more thermally stable, just heavier. The reason it is used is it takes up less space. Doing the same for pine and you get 371 kJ.m-2.K-1.s-0.5 around 6 times the energy released. Why the term 'thermal mass' is a nonsense term. Though you would not want to stick an electrical element into a block of pine and heat it up. Material properties from here: https://material-properties.org/

On very large military projects, the competing companies are often paid to produce designs and costings, and sometimes prototypes. Which reminds me, I must go and look at that new stealth, the B-21.

https://en.wikipedia.org/wiki/Feolite SHC 0.92 kJ.kg-1.K-1, k 2.1 W.m-1.K-1 and rho 3900 kg.m-3

Stayed in a place on the left bank, no A/C, was 34°C at 2 AM. That was cheap. But got to see the end of Le Tour nice and early. Still got my Le Tour cap. Pedro Delgardo won, well his chemists won really.

I put mine up in a cheap hotel. That stopped them visiting.

My boss has strange accounting ideas. When we have to throw stuff away (a legal requirement) he prices it at the retail cost, not the wholesale costs. VAT to him is a turnover tax, not a tax on profit (he still thinks we are on the old 12% scheme). Luckily, in the words (almost) of Joe Walsh, "have accountants to take care of it all"

Just put in one, larger shower, large enough to squeeze two bodies into. Been years since I have had someone scrub my back, one disadvantage of living alone.

I don't think you understand business accounting very well.

When I go for a £2.85 coffee, I am paying about 30 times the price of the 'materials'. What do I get for that huge markup? Well to start with I get a nice girl or boy making it for me. I also get a seat, at a clean table. Toilets are are not too unpleasant. Car parking (that costs a few quid here in the summer). All the cafes have got 5 star ratings, the staff are properly trained,, and not just in making coffee, also in customer services. I also know that if I go to one of the other branches of the chain, I will get the same service, in similar surroundings. The product is consistent (I like the coffee they serve me, though cannot comment on any of the other products they serve). So I accept that I can make a coffee at home, for 10p, but that is not the point. I think you will find it is from fixed costs, not lost profit. High fixed costs will usually reduce profitability. Profitability is not absolute profit. Edit: Bit of a cross post with @saveasteading about profits/overheads/fixed costs.

Quite simply, if the storage heaters are overheating first thing in the morning, and are not heating during the late afternoon and evening, they are undersize (either though wrong usage of controls or actual physical capacity). Yet again, temperature is being mixed up with power and energy. They are different things. Learn the difference, it is three things to learn, not difficult.

Basically what @TerryE does automatically, and I do manually on my timers. Blue Columns

The legionella cycle is going to take up that difference I would have thought. If I 'overheat' my cylinder, it lasts about 3 days (200 lt at ~50°C usually, up it when friends stay to 65°C, then forget to turn it down again). My total mean water usage is 150 lt/day.

Look up Newton's Law of cooling, it is not linear. So to get usable thermal energy delivery later in the day, the stating temperature has to be high. The timing is nothing to do with the storage heaters, it is the time that the National Grid had deemed the most useful to them, and the power generators, to deliver cheap power. They can always have a heat pump fitted, I am sure they are eligible for a free one.

The world would be better without oxygen. No planning restraints on the moon.

Are you suggesting that gold plating and liquid nitrogen dipped leads are no better than copper.

So I got my EDF bill today. The new rates on it are as follows: Meter Rental Day Charge 56.28p/day Day rate 44.04p/kWh Night rate 15.37p/kWh Then they take off the £66/month, which actually leaves me in credit on my usage so far. I was paying, until 01/10/2022 Meter Rental Day Charge 55.10p/day Day rate 33.33p/kWh Night rate 17.68p/kWh So day up, night down and a penny of the meter. Now going back to the new rates they sent me a while back by letter. Meter Rental Day Charge 59.10p/day Day rate 64.99p/kWh Night rate 33.99p/kWh The update that @Nick Thomas posted up Meter Rental Day Charge 59.10/day Day rate 54.16p/kWh Night rate 13.01p/kWh So it seems to me that the EDF don't have a clue what they are charging.