SteamyTea

About as much use as putting filter tips on cigarettes. It is a shame that the standard of scientific understanding is set by the manufacturers of energy saving products.

Where will use that saving on a short shower, say 2 or 3 minutes. I think the problem with these devices is they need a relatively long time to start recovery processes. Energy scavengers, which these devises are, are rarely worth it in practice.

Yes. Nothing to loose now.

Or recrystallization

Combination of sea air and slug pellets. Or, much more likely, just because it is a different bean type.

Probably not as efficient as running one larger HP. ASHPs have better efficiency at part load. The idea is to not run them too close to maximum. Think this is Jeremy's spreadsheet. Heat loss calculator - Master.xls

So in winter, with the windows closed, thick curtains drawn, and an ASHP drawing minimum loads on setback temperatures, do you really think that a properly sized, located and run, will be a real problem, or one you want to imagine may happen.

At last I can slip the joke in about making it 12" long. Fold it in half.

As I say to farmers, only if you leave food out for them.

V2G or L seems a bit of an odd concept to me. I can see that the concept is attractive, but in reality you just drive about carrying extra mass because the batteries are part depleted. No one has thought it a good idea to run their oil central heating of the car's fuel tank. The arguement goes that when a few million people get home from work and shower, cook, watch TV, etc, the vehicle can supply some of the load and reduce the strain on the grid. Cheaper and easier to just fit static batteries where they are needed. If people can still get off peak power at 5p/kWh (my night rate is 14p) and peak power at 30p/kWh, then you are hard pushed to beat that.

Going to be a large heat pump. What can you do to reduce the heat load of the property.

Wouldn't that be the better way to do it. Why encroach on internal space when it can be outside.

2 kWh should be enough. I had 2 showers and ran my house on that amount yesterday.

That is all catered for in the white paper. They have to arrange carparking that has charge points. This is not actually new news.

If I remember, shall measure mine in the morning.

So does every self builder on here. 90% finished, 90% to go.

How do you make your own. Does it involve stripping Studland Bay of seagrass. Or is it the seahorse tears that do the business.

I sailed one. Called a gnats cock on the shop floor. Now, interference fits, tights as a nun's (expletive deleted).

Where they at the same temperature?

I think they are probably more to do with making sure all the phase change material becomes liquid while heating. Convection currents will tend to even the temperature out, but an off set to cater for distance from element could be easily established with experimentation. I do not know the product well enough, but as it knows it is full (element turns off), it would not be too hard to program something to make it take a charge after use. I think it has to treated like a car with a very small fuel tank on a long, unknown, journey. You take every opportunity along the way to fill it up as you go along.

Have often thought this is a good idea to get an extra kWh or 2 in a cylinder. I am currently running my cylinder with just the top element (on a timer to get the E7 rate). Water temperature is 20°C higher than it used to be, but a lot less volume and much less mixing. So saving between 1 and 2 kWh/day. Usually have enough hot water for the after work shower.

That is because they don't know it accurately enough. The trouble is that the phase change temperature is a constant. The only way to get it fairly accurate would be to measure the electrical input, measure the thermal output, factor in standing losses, then do the sums. Only needs a cheap thermal energy logger, a simple processor unit and some time. If the flow rate is constant i.e. just showers, no need for a flow meter.

The more the merrier. So am I, makes it easy. I just got a RPi based logger on a CurrentCost energy monitor.

The energy transfer is greater when there is a larger temperature difference between OAT and IAT. So when you want the maximum transferred, you get it.