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Post by crabbyoldgit on Jan 23, 2021 19:47:56 GMT
i am a bit of a renewable energy fan, solar panel , log burner ,and additional insulation owner. The fact is burning oil is huge waste of a source of raw material to form plastic , clothing and just about anything else modern living requires. But heat pumps in my experiance will have to get to a whole order of better performance and more importantly reliability and life cycle span before i would remotely consider buying one. Neighbours who have invested in air and ground sourced systems all rule the day and have fitted gas boilers to replace failed or non performing systems, they just do not stand up to the salesman speel.
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Post by Deleted on Jan 23, 2021 20:46:46 GMT
I think air ones have a long way to go. My Dutch friends with ground based units swear by them but you have to ensure the building is not damp. Gi Go as they say.
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Post by Companion Cube on Jan 24, 2021 20:51:18 GMT
i am a bit of a renewable energy fan, solar panel , log burner ,and additional insulation owner. The fact is burning oil is huge waste of a source of raw material to form plastic , clothing and just about anything else modern living requires. But heat pumps in my experiance will have to get to a whole order of better performance and more importantly reliability and life cycle span before i would remotely consider buying one. Neighbours who have invested in air and ground sourced systems all rule the day and have fitted gas boilers to replace failed or non performing systems, they just do not stand up to the salesman speel. You seem like the person to ask this, If someone was self building from scratch would you still advise against ground pumps? I wonder if the tubes in the garden for an existing house would be more limiting than having full access to the ground under the house with possibly less distance, hence heat leakage travelling to the house. I.e. designed in from the start.
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Post by Deleted on Jan 25, 2021 11:23:01 GMT
Another piece of good news as renewables pass fossil fuels in the EU
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Post by Deleted on Feb 15, 2021 17:27:18 GMT
You need to see the prices of balsa wood. (core to some blades)
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adrianc
Member of DD Central
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Post by adrianc on Feb 15, 2021 18:03:14 GMT
Don't tell the tree huggers about how they de-ice wind turbines, see Twitter post below (twitter-dot-com/lukelegate/status/1361149723072208896 if you don't see it below)....
Got to love the deniers... I doubt the de-icer is "made with fossil fuels" - and electric helicopters are already around, albeit limited currently. But, either way, that turbine is producing a LOT more electricity than those amounts of fossils would if used directly.
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Post by df on Feb 15, 2021 18:52:52 GMT
Don't tell the tree huggers about how they de-ice wind turbines, see Twitter post below (twitter-dot-com/lukelegate/status/1361149723072208896 if you don't see it below)....
Got to love the deniers... I doubt the de-icer is "made with fossil fuels" - and electric helicopters are already around, albeit limited currently. But, either way, that turbine is producing a LOT more electricity than those amounts of fossils would if used directly. Denial propaganda is very well funded by those who are making fortune on fossils. Otherwise renewables would've progressed much quicker.
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Greenwood2
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Post by Greenwood2 on Feb 15, 2021 19:00:12 GMT
Don't tell the tree huggers about how they de-ice wind turbines, see Twitter post below (twitter-dot-com/lukelegate/status/1361149723072208896 if you don't see it below)....
Got to love the deniers... I doubt the de-icer is "made with fossil fuels" - and electric helicopters are already around, albeit limited currently. But, either way, that turbine is producing a LOT more electricity than those amounts of fossils would if used directly. Do you have a calculation for that, including the manufacture of the base, which many people seem to think tips the balance? I am on the fence here. I see both sides of the green or is not so green argument
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adrianc
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Post by adrianc on Feb 15, 2021 22:55:10 GMT
How about a 2011 Parliamentary briefing doc on the carbon footprint of various generation technologies, considering full-life including construction and decommissioning... It's basically a precis of various academic research. www.parliament.uk/globalassets/documents/post/postpn_383-carbon-footprint-electricity-generation.pdfGrams of CO2 (equivalent) per kiloWatt/hour of electricity (gCO2e/kWh) 360-500 for CCGT 780-990 for coal 85-115 for solar pv 15-50 for geothermal (with "extreme worst case" to 750) 5.5-26 for nuclear -20 to 50 for marine/wave/tidal (-ve from up-stream silt deposition sequestrating carbon) 5-40 for wind 2-13 for hydro 25-550 for biomass (with a legal cap of 285 from 2013) There's probably others, and almost certainly more recent - one thing's for sure, the balance is going to have swung further towards renewables, with better tech.
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Post by bracknellboy on Feb 16, 2021 9:07:21 GMT
Don't tell the tree huggers about how they de-ice wind turbines, see Twitter post below (twitter-dot-com/lukelegate/status/1361149723072208896 if you don't see it below)....
I see that in Luke Legate's twitter profile picture he is wearing a hard hat and in the background is a mass of pipes and valves which look very likely to be either oil or gas distribution, which makes sense since he appears to deal in "Texas Public Affairs". So likely not a terribly neutral observer. And to be clear: I am a firm believer in looking at the total through life environmental costs/impacts for alt/renewables. Green is not always greener.
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adrianc
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Post by adrianc on Feb 16, 2021 9:58:34 GMT
I see that in Luke Legate's twitter profile picture he is wearing a hard hat and in the background is a mass of pipes and valves which look very likely to be either oil or gas distribution, which makes sense since he appears to deal in "Texas Public Affairs". So likely not a terribly neutral observer. Texas Public Affairs for a company called G. Fox Consulting. First testimonial from their website front page? "“We deal in complex issues involving regulations, legislation and their impact on the public and often have a short time-frame to respond to inquiries and challenges. We’re grateful to have a partner like G. Fox Consulting, who not only grasps what we do but can translate it for any audience, so they understand, decide and act.” Todd Staples, President, Texas Oil & Gas Association"gfoxconsulting.com/You could almost think that tweet was a paid piece of PR on behalf of a certain industry... And, of course, Texas is going through absolutely exceptional weather at the moment - 30degC below the usual seasonal temperatures, coldest ever recorded... Hmm, climate change? This seems apposite.
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adrianc
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Post by adrianc on Feb 16, 2021 14:12:53 GMT
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Post by Deleted on Feb 16, 2021 15:14:57 GMT
Luke clearly is sitting on one side of the argument.
It seems to me that 1) Climate Change is real, 2) Not everything that claims to reduce CC is valid.
For example Luke's latest article claims that the US is reducing its CO2 production. This may or may not be true. But it depends on how you measure CO2 production. Imagine a German designer designs a widget that is produced in China and consumed in the USA. Was the CO2 produced in Germany, China or USA? Luke would argue China, I would argue USA.
There are those who say they are sitting on the fence. Sorry, but there is no fence. You are either for CC or against it. Decide and bet your decendants on the outcome.
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adrianc
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Post by adrianc on Feb 16, 2021 16:26:31 GMT
There are those who say they are sitting on the fence. Sorry, but there is no fence. You are either for CC or against it. Decide and bet your decendants on the outcome.
"What's the worst that'll happen? We've improved the environment without needing to."
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Post by Deleted on Feb 16, 2021 17:19:54 GMT
There are those who say they are sitting on the fence. Sorry, but there is no fence. You are either for CC or against it. Decide and bet your decendants on the outcome.
"What's the worst that'll happen? We've improved the environment without needing to."And, we still have all that oil and coal that future generations can use.
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