SteamyTea

Yes, I forgot you were there and she was looking at you.

Yep, as Fiona Bruce said, 'so nice to see an old friend'

I made a suitcase from mine, can get a months worth of clothes in it. (and if I rub it hard, it swells up and becomes a policeman)

How do you manage that in your small, stubby, inbred fingers.

I only worked and played there. Don't think I did anything of merit. Not even at work (was one of the worse places I ever worked, I once managed 3 days in a row doing nothing, and no one noticed, so took the next day off, and no one noticed that either).

Once all 27 other devices agree. And then only after 3 years of debate and watering down to fit the one trouble maker. (I was trying so hard to be balanced)

The BREXIT Bridge. So it will fail to communicate, crash out as the best option, not consistently apply established protocols, cost more and offer less. But it will be "world class". Just as long as your world is tiny and closed. Some good engineers and theorists from there. Not rubbed off over the generations. Still, it accounts for your humour.

Yes, Windows. Would make a fine server.

By vastly improving the inefficient Bolton and Watt steam engine. This made mining more profitable and allowed people like Humphrey Davy to develope chemistry and physics quickly. This led to the development of electrical systems used by Marconi, who sent the first transatlantic radio signals from Cornwall, which also had the main global telegraph network. So if you need something done, get a moaning, pasty munching Cornish to do it. And, we did not need slave labour like Bristol.

Yes, but more for a better CoP. I have heard that the technology is changing for the last decade, or more. Not really changing, just a few different chemistries, nothing radical. You can get a roof integrated system that can work out cheaper than fitting tiles/slates. One area that it can help a lot is if you need to 'reverse' the ASHP for cooling in the summer. Any kWh generated and used is a kWh not imported. So true.

Welcome Steve. Are you at the millionaires end of the street or the other end, the multi-millionaires. Used to work in Marlow, and go kayaking from under the bridge. Have been known to jump off it for a laugh.

I did some work for Monodraught and was amazed how good sun pipes are. I also think the is a lot of scope for innovation. I have a dome and a diffuser kicking about still, would go well in my bathroom.

It may be possible to utilise the MVHR to extract air from the living area and deliver it to the sleeping areas. There may be enough of a temperature drop to deliver the fresh air at an acceptable temperature. You would still need to introduce fresh air to the living area, and extract from the sleeping area, but this may just be a case if adding two inputs to the sleeping area for every one extract, and visa versa in the living area. Should not be too hard to calculate.

The energy source can be anything, heating, lighting, solar gain, people. The energy is just dispersed to the atmosphere, which is generally colder, or, for the proper scientific term, a semi-infinite heat sink.

https://www.engineeringtoolbox.com/pressure-drop-compressed-air-pipes-d_852.html

Is the converse true? Can go up to 15m2, be less than a metre from boundary and be made from flammable material?

The volume becomes a bit irrelevant when the temperature changes are only affecting the first few millimetres. This is why it is the product of the SHC AND thermal conductivity.. There are materials that have low SHC and high thermal conductivity, metals being one class, but there are not many materials that have high SHC and low thermal conductivity. Below is the data from my 600mm borehole that is under my little grrenhouse. Once you are 300mm deep, there is little variation in temperature, approx 5°C, with temperature swings of 32°C within the greenhouse. This reinforces my believe that excess mass with the 'wrong' thermal inertia will cause cooling rather than stability.

Basically you have a choice of two systems. An electrical, in line, resistance heating element, or a fluid filled 'radiator'. The electrical one is easy, it just plugs into the mains, the other is then really up to you how you heat the fluid. But if you are using an ASHP to heat your domestic hot water, it can be 'tapped' off that system. Some MVHRs (Genex for one) have a build in heat pump to add to heating and cooling. This is really two questions. How does a heat pump work in practice? and what is the best way to control the complete system? At its most basic, a heat pump has a hot side and a cold side. The plumbing within the heat pump will control which side is piped into the house. Basically there is the refrigerant pump, then, via some heat exhangers, some pipework to a radiator (the air source bit) that is outside, and some pipework to inside the house (the source or sink) for space and\or water heating. Just a case, depending on what you want, as to how the control valves reconfigure the heat exchangers. As for the house heating controls, this is a bit more complicated as it is very much dependant on the shape of the house and the usage. It is usual to zone areas and control each zone separately. That way you can have different temperatures, at different times for heating or cooling, is on and in different places. What many have found though it that having just one zone for the whole house is often good enough, and can be used to move excess heat around if needed, without using the heat pump (just pump the water in the UFH about). One thing with heat pumps is that they need to be designed correctly for the expected heat loads. This usually means over sizing them as that keeps the coefficient of performance up. Most modern ASHP have variable speed motors in them that accommodate this. It is also worth getting to grips with the difference between temperature, power and energy. They are not the same thing. You can have high temperature, but low energy and low power, low temperature and high energy and power, high or low power, medium energy and variable temperature. All a juggling game.

He better sue his installer, MCS and his DNO\meter reading company for this.

Good point. May check when I get home.

Could you fit a diamond saw to a cheap table saw. Then saw the existing bricks in half. My large angle grinder cuts through most things with the cheap diamond blade in it.

If you are considering UFH, how much insulation are you going to fit under it. Heat loss to the ground is greater with UFH than radiators or forced air systems. If you fit post heating to your MVHR, chech that the airflow is large enough to transfer enough energy. It is easy to put in larger ducts at the design stage. You mentioned 'thermal mass'. This is a contentious term and has no basis in science. What you actually mean is thermal inertia, which is the product of the specific heat capacity and the thermal conductivity. What that boils down to is the time it takes for the air in the house to drop by 1°C when there is no extra energy input i.e no heating. Brick and concrete are not very good, timber and cellulose insulation are very good.

How about a bad arable field, or one that is used to grow flowers on, or maybe just to keep pet horses. And that if before ex farmland is turned into golf courses. One thing that we don't have a lack of in the UK is land. We just have a system that stops us doing much with it. This may well change if we change our farm subsidies, but I am sure the new system will be fiddled, abused and not fit for purpose.

Show us your evidence to the contrary. That same link shows UK data to.

Does it now. https://data.worldbank.org/indicator/SL.AGR.EMPL.ZS