SteamyTea

Sisyphus

Building regs have changed twice in that time. So what you have is an almost finished, outdated house. Good man.

Enorma

Not measured mine.

Post up the pictures, we all like thermal images.

The henry bit I remembered.

You won't see that unit, think it means Kelvin times angular movement times capacitance. kWh is what you mean.

Racing ahead now. Should we put a tape measure on them.

You can run a SA exactly the same. Works best if it is just depleted before recharging, and that recharging is done at the phase change temperature. If you want more hit water, why not increase the 100lt cylinder temperature, or charge it up more often, or for longer. 2 kWh is not much heating.

Realistically only by building a new house inside the old one. Biggest problems, in old houses, are low insulation, thermal bridging and dreadful ventilation control. Apart from that, they are quite good.

From this week's comic. Trees beat energy crops as CO sink 12 May 2022 Nearly twice as much carbon could be removed from the atmosphere by using available land in the US to plant forests rather than grow fuel crops and capture the carbon dioxide emitted when those crops are burned, says a study. Trees can also help to avert water shortages (Science Advances, doi.org/hsxs).

Passive solar heating. The one thing that has always crosses my mind when thinking about it, is, if it worked, we would all be using it.

Welcome Large and South facing, with integrated PV. And good gutters because if you can see the beacon it is about to rain, if you can't see it, it is raining. More seriously, have you any restrictions on the build concerning sewage and services (at least no gas to worry about).

Two things. Have the people who have quoted you just used default insulation levels for the UFH i.e. 70mm of insulation? Have they used a default power per square metre number i.e. 25W.m-2 Generally, larger buildings take less energy, on a metre squared basis, than smaller ones. With a building that size, you can get a lot of PV on the flat roof, that would offset a lot of the running costs.

Only had a quick look, but the units are showing kWh.m-2. Is that for the whole month? So taking January, at noon, 13 kWh.m-2 Divide by 31 (days in month) and that comes out as a mean of 0.42 kWh.m-2. This seems a bit high, but may be correct for a clear sky when the direct beam is measured.

With your nails painted, was it a Puff Adder.

Did she say 'Moooove over'

It is now.

You could, take it to a specialist engineering company and get them to accurately bore holes the complete length of each half. Then get a tie rod and washers and nuts at each end. Tension the tie rod up. Think of it as a pre-stressed structural member. Where is @Gus Potter he could calculate how many turns on a threaded bar will be needed. Or just stick a rawl plug in a hole.

It is the smallest independent circuit in the system, not the compete system.

Not in my pots they won't. Got furry fungus on my potatoes though.

How about this one. Not read it myself, just a quick skim. Does talk about thermal mass though. https://www.irjet.net/archives/V8/i2/IRJET-V8I2307.pdf I think the problem with using timber shelves is that the grain needs to be pointing towards the heat source (sun). Books should be similar to cellulose insulation, a bit denser, with a higher volumetric heat capacity, but greater thermal conductivity as they have less air between the pages. I find that books, when stored badly, go mouldy. My first dissertation rotted away in my first house in 18 months. Shame as I was quite proud of it at the time. I once modelled this and then created an experiment. I used 15 W.m-2 and 25 W.m-2. There was very little rise in temperature at those low levels. Newton's ghost was hanging around I think, then Fourier came and gave me a kicking.

Why don't oil burners modulate. My car is a diesel, modulated extremely well.

Would you be interested in putting energy meters on both the ST and the DHW side of the PV. Chart the readings against your weather station. (the ST thermal meter need not be an expensive one, just something that logs the times it is running and the flow and return temperatures, a RPi job)

Like any water problem. How to remove the water faster than it collects. Just complicated by the amount of suspended solids in it, evaporation rates and frequency of rainfall.