E7 as a fixed time tariff is probably on the way out, but storage heating if properly implemented is very useful as part of a smart grid as it's a big load that can be switched on and off with neglible inconvenience to end users. As gas boilers aren't supposed to be fitted after a few more years there's have to be some way of making sure that electric heating doesn't use the most expensive peak-demand power.
Energy Efficient Wall Mounted Electric Radiators
- Thread starter Ducky
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E7 as a fixed time tariff is probably on the way out, but storage heating if properly implemented is very useful as part of a smart grid as it's a big load that can be switched on and off with neglible inconvenience to end users. As gas boilers aren't supposed to be fitted after a few more years there's have to be some way of making sure that electric heating doesn't use the most expensive peak-demand power.
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Or even better, a heater which offered variable output power, to suit the heating demand, rather like a modern gas boiler or my electric shower.
In my area, SSE has introduced a 7-hours overnight tariff aimed at electric vehicle owners. They won't allow anyone to have it who can't prove they have an EV, and I can't even see the price.
When the country is stuffed with nukes and windpower, there'll be a lot of spare energy available off-peak.
What, you mean like yesterday?
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I would not dare suggest any such thing, I'll wait for the eventual promised port mortem.
https://www.ft.com/content/49d94586-bb47-11e9-b350-db00d509634e
The last similar incident was in 2008, when the Sizewell B nuclear plant in Suffolk and the now closed Longannet coal-fired station in Fife went offline within minutes of one another
The last similar incident was in 2008, when the Sizewell B nuclear plant in Suffolk and the now closed Longannet coal-fired station in Fife went offline within minutes of one another
How does that differ from E7? If I had an EV, I could charge it overnight and 'enjoy' the E7 that everything else in my house enjoys for 7 hours each night - or are you implying that (although you can't see it) the night rate may be cheaper than with standard E7 (or maybe even higher than E7!) ??
Kind Regards, John
It doesn't really seem to make much sense (to have something similar to, but different from, E7) - why does it matter to them whether night-time electricity is used for storage heaters or EV charging?
Kind Regards, John
Yes, if such a system were 'perfect', then that would be the ideal. However, if it were less than perfect, I think there might be some scope for it possibly making things worse - if it responded to the temp rising above the desired level by 'turning the power down a bit' (rather than turning it off), one might end up with the temperature remaining above the desired level (with energy implications) for longer, mightn't one?
Kind Regards, John
Having had a very quick look around it seems that a good few suppliers are offering 'EV tariffs'. On the basis of a very quick glance, I can't really see how they differ from standard E7 tariffs, other than that their marketing people are targeting EV users rather than those with storage heaters.
Kind Regards, John
No it needn't. I have designed such systems for motor speed control, plus crystal ovens, lots of other proportional schemes over the years and they behave perfectly once they have settled to the set point. Even my car's climate control uses the same system again perfectly, varying fan speed and mixer flaps to hold a very stable temperature. My gas boiler's control system also now uses a proportional system, ramping output up and down by interpreting current temperature against the set temperature. The too warm when producing heat and too cold feeling when it goes off is no more.
On/off is so old hat now.
Sure, analogue feedback control systems have been around 'for ever' (e.g. 'automatic gain/volume control' in electronic items), and generally work very well. However, my point was related to Owain's earlier comment, in that even a 'proportional' control system is to some extent at the mercy of the the characteristics of the temperature sensor (an issue which does not really arise with things like AGC/AVC).
Kind Regards, John
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