SteamyTea

I have never really seen the advantage of an overcomplicated system like this. Tidal stream turbines are simple, and work, and they are always in the same position that you leave them. There are a limited number of places this sort of technology can be installed. You need relatively shallow water, with a greater depth and therefore volume, either side. Then not in an area with large mammals and fish, not in a busy shipping area, though shipping tends to avoid tidal races, not is a fishing, or potting area, somewhere that is not disturbed by large waves, you don't want suspended sand or silt either. If we are to develop tidal power, tidal lagoons are probably the best available technology at the moment. People should learn lessons from Wave Hub.

Not having a variable tariff on the gas is an advantage, one less variable to match up. But there have been times when variable electrical tariffs have been below the price of gas, maybe not at the moment, but there will be in the future. So this is where you use a HA system to not use gas but use the PV or the cheaper than gas electricity.

Surely you do. If you can use your PV instead of gas then you are better off. Smart Metering is means to be more than just remote meter reading.

Yes you do as that is power, not energy.

Take a simple scenario of adding your server as the only load to the grid. It just draws in the 1.2 kW. Now if you fit a grid tied 1 kW PV system, all the power that produces will go to the closest load, your server. Grid imports will be reduced in direct proportion. So while the DNO needs to be told, this is a safety matter, you will never be exporting. Now with a small system, most of the time it will not produce the nameplate power, that is just the way daylight works with PV. So it is usual to oversize the module arrays so that the mean generation is closer to the load, so maybe a 2.5 kW system would be better. You can run the numbers though PVGIS and see what comes out. There will be optimal sizes, both performance and financial for your needs, even allowing for exporting unused generation. But the setting up will be cheap and simple. No need for load sensing switched and spikey changeovers. But first, is there anyway you can reduce the server load, the heat given off would heat my house nicely. Maybe I should build one and rent it out, except I can only get 5 mb connect speeds.

1 yes. 2 reasonably wide within ideal flow and return range. 3 a coil will hydraulically separate the ASHP from the rest. 4 I think a 2 port is really a volumiser and goes in series with a pipe, 4 port goes in parallel. Go 4 port. 5 don't know but would have thought so. No need to go via the buffer for DHW, but I think you know that from your earlier comment. 6 I think it depends on which way around it is plumbed, which would make it more of a thermal store. It also depends on how fast the discharge and recharge rates are i.e power out v power in. 7 no Idea, but I would have thought so. 8 I don't really know much about the nuts and bolts of installations, and I know that some things can seem counterintuitive in plumbing. Space heating and DWH are different things, at different temperatures and at different times. The more they can be separated the better in my opinion.

I did a PM course at university. The lecturer seemed to be only half a page I front, and relied on us, older students to fill in gaps. Only new thing I learnt was not to use MS Project.

This is an interesting problem as usually we are looking to thermally isolate elements, not join them together. Underlay also needs to deaden sound and allow some 'bounce' underfoot. So I thought I would look at two common materials, rubber and cellular rubber. These have thermal conductivities of 0.13 and 0.045 W.m-1.K-1 respectively. Now assuming that the underlay is only 6 mm thick, then: Rubber 0.006 [m] / 0.13 [ W.m-1.K-1] = 0.0462 [R = m2.K.W-1] 1 / 0.0462 [R] = 21.65 [U = W.m-2.K-1] Cellular rubber 0.006 [m] / 0.045 [ W.m-1.K-1] = 0.133 [R = m2.K.W-1] 1 / 0.133 [R] = 7.52 [U = W.m-2.K-1] So cellular rubber will be 3 times more insulating.

Is that the right type of cylinder for your future needs? I don't know the cylinder, but isn't it for solar thermal, not photovoltaics?

Usually a race to the bottom is a bad thing. But not here.

Isn't that why people post their code up to Github?

Computer is mashed. Did you really think I would say what it really means: Computer is Microsoft

CIM

Is the interrupt the wife coming in, and how do you handle it?

Yes well, we all know how that muscle got developed. So with all this knowledge, turning the lights on and setting the heating would be a doddle. I expect to see a working example by Friday noon.

Nor do I. There are about 25 trillion blood cells, so even if they could be in only 1 of 4 places, it would take longer than the age of the universe to count them. P versus NP But some simpleton Physicist have made a major breakthrough in the Riemann Hypothesis.

Just been discussing a similar thing here:

Now you are just talking like a programmer. It is a case of using English words, but in an odd manner, until they do not make sense.

So do I. I understand BASIC and the underlying assembler, but seemed to miss the decade when C came along. When I worked for Welcome Break they had a new POS system designed in Israel. One of the test engineers came over and on a Monday morning started, what looked like random touch screen presses, until something went wrong. Then she wrote the sequence down, and started again. She did that for two weeks. I would have cheated.

(expletive deleted)ing good job I am upcountry then.

Never claimed it was easy. I hated the software modules at university, and I was one of the better ones at it. But surely these days you get modules that are added onto the main program. What happens in the Python stuff I use.

Or just a cheap, non sine wave inverter do it. The kind you see for 40 odd quid. Do the cheap inverts match an elements impedance better?

I thought you were working on cold fusion, shame it is not taking up more of your time.

What amazes me about home automation, especially on this site, is that will all the programmers on here, and a few hardware experts, they have not designed an open source one that can have simple modules that plug in.

This woman only needed 9 days treatment. http://news.bbc.co.uk/1/hi/england/cornwall/3035606.stm