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Everything posted by SteamyTea
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Probably need a lot more information for a definitive answer. Knowing the surface to volume ration helps, cooling is nearly all about volume. PV on a roof will take out energy when it is sunny, reducing heat load. Also have a look at air to air heat pumps, they can heat and cool, and are very cheap. How do you want to deal with domestic hot water, stored or instantaneous? 30 m² is 2/5 the size of my place, and I use night storage heaters and a 200lt hot water cylinder.
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
I am taking this a little bit out of context (of HPs or gas), but am interested in narrow goals. Is it not a case that the UK is not working in isolation, we are part of a global species. Most countries will be taking a different approach, but with the same aim of net zero. There will come a time, possibly in the not to distant future, where only goods and services must meet a minimum criteria of carbon emissions or they cannot be purchased. As long as this is audited correctly, then there should not be a problem. There will always be odd ball situations that skew the figures i.e. County A may have higher agricultural emissions than country B, but lower industrial emissions. But the idea is to get divergence to, initially, net zero. Carbon negative can come later, but not too late. I don't think we need to particularly do this via austerity i.e. heat your house to 16°C rather than 20°C, but we will need to be careful of marginal gains i.e. a factory that makes heat pumps that have embodies carbon at say 10 units per HP, overproducing to get the unit value down to 8 units and they then just sit on a shelf (we used to have 'food mountains'). How each country does this is rather irrelevant i.e. nuclear, RE, efficiency gains, tree planting, CCS, the idea is to get to net zero. Also worth pointing out that land is only around 30% of the earths area, there are huge carbon sinks in the oceans and seas. There are also huge risks of acidification, rising temperatures, overall sea level rises and the more devastating storm surges. So I don't think a narrow goal is the problem. The problem is getting the ball into the goal. -
Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
Are you an American? It has an s on the end. -
Try way back machine. He may have dumped the buffer, it was there when I last visited. Not sure if the slab mass makes a lot of difference to the cycling once it is at operating temperature. More to do with the flow/return temperature differences. A kg of water needs 4.2 kj to raise it a kelvin, concrete only needs 0.8 kj. So a kg of water is worth 5 of slab. And all the water can be heated, but there will be a temperature gradient with a slab, which may effect performance.
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He had a buffer. He also used to to preheat water going into his original Sunamp and to recharge the Sunamp.
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Half the customers on that job were happy. So that made 2 our of three of us there. If it had been a vote for BREXIT, I would still be in.
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Here is someone I know. Scroll down to see his name, no wonder he has a stutter.
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I had them screwed shut when her husband came in.
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At my Public School it was a couple of Jocks. Ben Doon and Phil McCaffity.
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Did you end up with a Manx Cat?
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When I was in the PV industry they changed the MCS rules about fitting inverters in lofts. One of the rules was boarding from the hatch to the mounting area. My boss just saw this as an extra expense. The electrician we used said it made for a much quicker job to fit the inverter. Fitting loft boards takes minutes. Why would anyone not do it.
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More a reflection in the borrowing and earning potential between I side and outside the M25. And people from Treacle Bumstead are tossers.
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Yes. Why I did it for a couple of years when I needed extra cash. Small capital outlay, very cheap insurance, and everything fitted in the boot of a mid 90s Corsa. Could earn 3 times the money in Harrow compared to Hemel Hempstead. Only got thrown off one job, but that was nothing to do with the decorating.
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
First rule of statistics: Is the number big. It was our old mate @Ed Davies who pointed out that the UK produces more 'area' of cars than housing. -
Was true in the private school educational system, but matron usually managed to remove them.
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
May be more of a case that getting older is unhealthy. -
https://mechanicalbasics.com/reversed-carnot-cycle-process-cop-limitations/ Probably getting close in some circumstances. They can go higher than 5, but this is not really the way it should be described. They performance should be as a fraction of the Reverse Carnot Cycle. Similar to how wind turbine performance is expresses, as a fraction of Betz Limit. https://physics.stackexchange.com/questions/350074/is-there-some-theoretical-maximum-cop-for-heat-pumps-and-chillers Choice of gas is important, ideally you need to work close to either side of the critical temperature. I believe this is done in CO2 systems. Water would make a good refrigerant, except it would not work that well below 273k.
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Will it work this time? https://www.independent.co.uk/climate-change/news/climate-emergency-gas-boilers-cop26-b1902658.html
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https://checker.ofcom.org.uk/en-gb/mobile-coverage
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
I have not bothered to look into this much, but there is a CO2 equivalent with refrigerants. But not all of them will leak. Natural gas, by its very chemistry, will produce CO2 when burnt in air. Electricity can be very clean. There is also an infrastructure issue, we have one network that is multi use i.e heating, cooking, lighting, machinery and transport, and another that is just heating and cooling. There will be a carbon cost to that. -
You will almost certainly have a hotspot router on your phone. Try that out first.
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
Now you are in a much milder climate (was it Kent before), you may find yours heating demand is lower. -
Before considering SBB, have you tried your, or different, mobile phone 4 or 5G offerings?
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Heat Pumps & Hydrogen Powered Boilers Book
SteamyTea replied to Des Ingham's topic in Introduce Yourself
Apart from capital cost, why do you think it is unsuitable? Same question? -
This is a difficult one with a shed. Depends on the differences in humidity and temperature between inside and outside, if it is heated/cooled and how often people work in it. I put the vapour barrier on the outside of mine as it is unheated and I very really actually do any work in it. I also live in a place of high humidity. My thinking is that keeping moisture out would be most effective rather than the condensation risk. Worked well.
