Green Building Bible, Fourth Edition |
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These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment. PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book. |
Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.
Posted By: Ed DaviesThe things I like about the idea, in principle, of district heating are that they:
Posted By: Peter_in_HungaryThe thing I don't like about the idea, in principle, of district heating is that they can have high transmission losses.
Posted By: WillInAberdeenEach consumer has a little heat pump to boost the temperature to whatever they need to run their CH/UFH.And DHW?
Posted By: ArtiglioIceland has the major advantage of all the heat being easily accessible and at far higher temperaturesAs well as so plentiful that no one cares about inefficiencies and losses.
Posted By: fostertomPosted By: ArtiglioIceland has the major advantage of all the heat being easily accessible and at far higher temperaturesAs well as so plentiful that no one cares about inefficiencies and losses.
Posted By: fostertomNow we think that wind tide and waves are harmlessly 'renewable' infinite resources that we can harness forever, but ultimately what we're depleting is the planet's rotational momentum.
Posted By: djhtide is mostly due to the influence of the moonYes, by maintaining a standing wave as Earth rotates under it. By increasing friction via tidal turbines, letting water in and out of barages out of sync etc, we are leveraging the mass of the moon to slow down Earth's rotation.
Posted By: fostertomBy increasing friction via tidal turbines, letting water in and out of barages out of sync etc, we are leveraging the mass of the moon to slow down Earth's rotation.
Posted By: djhNot in any meaningful senseThe article agrees the effect is, as I implied, only 'a near infinitesimal amount' but definitely 'meaningful'.
Posted By: djhNot in any meaningful sense.Agree it wouldn't be meaningful in the sense that it'd not matter for a long time (many thousands to many millions of years, haven't done the arithmetic). It would be measurable, though. In a discussion elsewhere I happened to post yesterday:
See https://physics.stackexchange.com/questions/6400/are-tidal-power-plants-slowing-down-earths-rotation
Digging a little deeper, it seems the Earth's energy loss due to friction is around 3.3 to 3.7 TW depending on which paragraph you look at:Getting all our energy from tides is obviously a silly idea (though not so silly I haven't heard it proposed) and, in this case, noticeable means detectable using VLBI (https://en.wikipedia.org/wiki/Very-long-baseline_interferometry).
https://en.wikipedia.org/wiki/Tidal_acceleration#Angular_momentum_and_energy
For comparison, humanity's final energy use in 2017 was 12.9 TW (113'009 TWh in the year):
https://en.wikipedia.org/wiki/World_energy_consumption
Given that humanity probably needs to, very approximately, double its energy consumption this century that actually would make a noticeable difference if we tried to get it all from the tides.
Posted By: JontiSurely the way forward is to make each property self sufficient from an energy point of view.That was once Government policy - all new homes were going to be zero carbon by 2016 https://www.theconstructionindex.co.uk/news/view/cost-of-scrapping-zero-carbon-homes-revealed.
Posted By: tonyVery difficult to be self sufficient. Solar works best in summer but highest demand is in winter. Wind hardly works in towns let alone cities, best hydro is in other countries, some in Scotland
Insulation works but building regs are light on it
Posted By: JontiIt certainly is an effort to be self sufficient but that is the way that we need to go.
Posted By: djhPosted By: JontiIt certainly is an effort to be self sufficient but that is the way that we need to go.
Why do you think it is necessary or even a good idea for every property to be self-sufficient? Why are communal schemes bad? What is wrong with local, national, international and even intercontinental electricity transmission?