SteamyTea

Don't they do the lower transition temperature ones any more? I keep meaning to model this. You may be better off, overall, having high temperature input at the begining as the power transfer is better i.e. less time to increase the store by 1 K. Then increase the temperatures input difference as the store increases. As long as parity is not that close, and the HP has the capacity, and the store does not loose too much energy, it may be cheaper. Trouble is, reality is messy and and we cannot control the weather in advance of our space and DHW needs.

Don't you mean pound-foot for torque. Force at a distance. Or were you talking about Moments of an axis. That Lsd we had in the early 70s, been replaced with Ritalin. Will be interesting to see how this government (expletive deleted) up changing back to imperial units. Will be using the erg before we know it. One pound, lifted one foot is 1.356 × 107 ergs.

Have you considered heating/cooling and humidity control for when it is finished? This may change your wall buildups. Air2Air heat pump combined with a basic MVHR unit may be all you need. Basically make the inside airtight, then control that.

So a 38 W heater, and 9 W. Total of 47 W some of the time. Or. That 38 W could be an average. But that would be a strange way to show it.

And they store energy at a useful temperature.

I was showing that a watt, divided by an hour, kW/h, is a nonsense unit. We have the joule to describe that. J/s/s =J. May email to them in the morning to clarify what they mean. They could mean that that mean power was 312 W when measured over a 24 hour period. Which gets us back to the starting point of this thread.

They don't know what they are talking about. A watt is a joule per second. So if you divide 312 J/s by the seconds in a day (86,400 s) 0.00361 J There are 3.6 million joules in a kWh. To convert joules to kWh, multiple by 2.777778x10-7 1.0027777778x10-9 kWh A number so small, it is meaningless. I often get messages to stop being finickity about SI units. This is the reason I am a complete (expletive deleted) about them, to stop people getting confused. Learn the units, and the derived units i.e. W, J, kWh, then you can spot nonsense quickly. It is W, for watt, not Watt, that was the man, or w, that is, when italiced, often used for angular momentum. Similarly, J is for joule, Joule was the man, lower case j is used by engineers, in mathematics (not a science) for an imaginary number, it should really be i, for imaginary.

The Natural History Museum is good, they have stuffed pets there. Not far from the Red Lion at Marsworth and Ivinghoe Beacon where there really are wild wallabies.

Over how long? An hour, day, week, month, year, decade?

The same Attenborough who, for 30+ years was a climate change denier, then had a Road to Damascus moment about 13 years ago. Now he makes a very healthy living out of flying around the world, with a film crew, spouting how the rest of us are not doing out bit. Out of interest, if we had population control, how would we deal with the future needs of the current population?

Happened in Penzance a couple of weeks back. Range Rover turns up, lad gets out with machete, slashed a couple of local dealers, then runs away. Then the range Rover driver drives off. Not the brightest of revenge attacks as the security cameras are on that bit of road as it is a holiday route.

As the temperatures reach parity, power is reduced in a non linear manner. So you need a temperature difference to reduce the time it takes to heat. Look up Newton's Law of Cooling (it works for heating as well).

You need some of this, phononic crystals. https://www.popularmechanics.com/military/navy-ships/news/a14800/this-camouflage-coating-hides-submarines-from-sonar/

I think someone on here had it off him.

Looks very similar to what our Jeremy Harris originally used. He found the thermal losses very high.

That is the important thing. If GRP, then just a finding out what colour pigment, and what gelcoat the manufacturer used, then a bit of experimentation.

You may find that you are better off with a 200W wind turbine on a long pole. My sister runs a narrowboat business. I think she just has extra batteries to cover the times the boat is not used. They charge up pretty rapidly once the old motor is running.

It may still take a few hours to warm the compressor up. It is the compressor design/shortcomings that seem to be the problem. It is probably built down to a price, and to keep the warrantee/reliability it has to be constantly warm.

What power is it at the temperatures you are using?

You need lots of power to to lift it up. Microgeneration does not always supply lots of power.

The steeper the angles, more 'land' area is needed because of shading other modules. This is OK if you can moor the narrow boat with the bow or the stern pointing east, with ne set of optimally angles modules running the length. No good if it is turned 90° and al but one modules are shaded. You may have noticed that some large solar farms are set at quite shallow angles, the overall annual yield is greater, even though peak power is clipped. This has two benefit to the operator, they get paid more and can often keep below an export limit, which is based on peak power, not energy exported. One of the Birmingham universities made a solar powered narrow boat.

That is about what I use a day this time of year.

It's propane. B&Q will sell you 19kg for 51 quid.

Possible because we are going to 5G and the idea of centralised services is rather old hat. May need a nano cell, which an AP basically is, in some buildings, but was will all be totally wireless, just about everywhere, in the not too distant future. I can now get a signal at Porthtowan, the hippies must hate it.

Thinking back to when the FiTs system changed from 41p to 21p per kWh at short notice, it got challenged in the courts and the government lost. So hopefully this will be challenged in the same way for places that already have approval in place (or even better in the planning system before the rules changed). While I agree with the general principle of improving the environment, it has to be implemented sensibly, and 'offsetting schemes' are not the way to do it.