ARTE, planet down: a green public housing

[renaud67]

Hello,
what is unfortunate is that it is necessary to wait for a visionary (the director of German low-cost housing) before a decision is made ...
and again in Germany, which is at the forefront (in Europe) of renewable energy.
Not bad also the little verse on the village (whose name I have not retained) which has its energy autonomy and whose model will worry the big energy lobbies (gas, electricity and oil).

[Christophe]

Hello,
what is unfortunate is that it is necessary to wait for a visionary (the director of German low-cost housing) before a decision is made ...

Uh ... calling him a visionary is not wise I think.
It is especially the others who are ... idiots ... not to do it!

Not bad also the little verse on the village (whose name I have not retained) which has its energy autonomy and whose model will worry the big energy lobbies (gas, electricity and oil).

I wrote it down and I'm reporting on it right now ... it seems to me that we had already talked about it on the forums... I synthesize everything and I post ...

[goodeco]

I wrote it down and I'm reporting on it right now ... it seems to me that we had already talked about it on the forums... I synthesize everything and I post ...

Just there for the village

https://www.econologie.com/forums/biogaz-et- ... t1523.html

[Christophe]

Here is a quick summary with the key figures of this thema.

An eco-friendly low-cost housing - Karlsruhe's bet

Tired of the increase in their bills, the tenants of a building agreed to switch to renewable energies. Will this project be emulated?

SWR © SWR / Koßmann / Schlenker / Karnowski
Faced with rising prices for central heating, gas and electricity, the residents of the sixty-four apartments in a building in Karlsruhe can no longer keep up. The only solution to get out of this spiral: find an alternative to traditional energies. Our tenants then agreed to redevelop their building to convert it to renewable energy. This project plans to replace the gas with wood pellets that would power a district heating plant, which produces both heat and electricity. If the work is going to be expensive, the energy savings should be significant enough to cover these expenses. Tenants should therefore largely benefit from exchange rates and not see their rent increase. The documentary follows all stages of this transformation led by the Karlsruher Volkswohnung GmbH, a national building construction company. He also wonders about its possible impact: could it extend to all of Germany?

- Gas price multiplied by 2 in 2 years. Price at the start of the project: just over 4 cts / kWh (m3).

- Renovation cost:

a) 70 € / m2 of external insulation ... for 5000m² to do.
b) € 680 / carpentry for 300 carpenters in all

Total cost: 1,5 million € for the 2 buildings, or 64 apartments. Cost per apartment: 23 €.

Please note: contrary to what one might think, the renovation apparently did not only concern the thermal balance.
All interior walls and partitions have been redone, probably to indirectly improve the heat balance.

- Price of wood pellets / pellets: from 180 to 260 € / T during the project (18 months).

- Study of a stirling cogeneration with pellets from the company SOLO 161
-> solution abandoned because of technological delays.

Apparently this cogé just had to be a "plus" to the profitability of the project in any case the thermal power of the stirling alone would not have been enough to heat the buildings.

Here is their website: http://www.stirling-engine.de/index2.html
and they also developed a solar stirling, the SOLO 161: http://www.stirling-engine.de/solare_en ... steme.html
it was presented in the following report ...

- Installed thermal power: 2 pellet boilers of 300 kW

- The SOLO Stirling will be replaced by a small rapeseed cogeneration power not given but estimated between 20 and 30 kW max.
The company is in Baden-Baden

- Annual pellet consumption: 90 Tons, equivalent to 45 L of fuel oil or m000 of gas.

- CO2 savings given: 260 tonnes, equivalent to the combustion of 95 tonnes of gas (ratio of 2,75 kg of CO2 per kg of methane). The gas PCI is around 15 kWh / kg (10 kWh per m3, mass volume 0.65) or an energy requirement before transformation of 1425 MWh or 145 m000 of gas!

The energy needs for renovation have therefore been greatly reduced: from 145 to 000 m45 equivalent! Or a decrease of almost 000%! (when we tell you that it's worth isolating it's not for nothing ...)

- No information was given on oil consumption, but the tank that was installed must have been between 4 and 5L.

- Renovation financing over 35 years

- Average profitability per apartment on the energy bill: around 20 years

So much for the 1st report

[renaud67]

Hello,
what is unfortunate is that it is necessary to wait for a visionary (the director of German low-cost housing) before a decision is made ...

Uh ... calling him a visionary is not wise I think.
It is especially the others who are ... idiots ... not to do it!

Not bad also the little verse on the village (whose name I have not retained) which has its energy autonomy and whose model will worry the big energy lobbies (gas, electricity and oil).

I wrote it down and I'm reporting on it right now ... it seems to me that we had already talked about it on the forums... I synthesize everything and I post ...

I quite agree about the qualifiactif of visionary: it was the speech or rather the commentary of the journalist ... The implication on my part is that it should indeed be a more "normal" approach. .. in Provence, at least in the Marseille region (aix, aubagne ...) when there is no sun there is a mistral and yet we hardly see a solar panel (electric or heating) any more only wind turbines (although I believe there are a few in the plain of la cros): we should not actually tell people that we must be visionary to switch to renewable energies but be responsible ...
on my side as co-owner, I will try to recover water for watering ...
@+

[Christophe]

Here is the continuation:

Breaking the deadlock - Europe and energy

Faced with the imminent energy shortage, European policy must be overhauled. Overview of the measures envisaged.

SWR © SWR

Europe is very dependent on traditional energies such as oil, gas, coal and uranium. However, it does not have sufficient resources and must import half of what it consumes, to which are added two other problems. On the one hand, the various deposits will soon be exhausted: in around forty years for oil, around sixty years for gas and ninety for uranium. On the other hand, burning coal releases CO2, which worsens the greenhouse effect and accelerates climate change. The European Union has therefore planned, this year only, to develop a common energy policy. This plans to increase the share of renewable energies to 20% using solar resources, wind turbines and biofuels, and to emit 20% less CO2 by 2020. But, for that, it is necessary that Brussels succeeds in agreeing the Member States on concrete measures.

- We understand the term economic and ecological disaster (econological so?) By the following factors: increase in debt (to source fossils), increase in supplier instability and global warming.

- 2/2/2007 Chirac made a nice speech by talking about our irresponsibility in the face of these threats. (I think I missed it at the time?)

- Russia supplies 1/3 of Europe's oil and gas

- 6% of primary energy is renewable in Europe (beware not panic: 70 to 80% of these 6% are by hydroelectricity, therefore Edf et cie ...)

- we see Benjamin Dessus, energy expert (see http://fr.wikipedia.org/wiki/Benjamin_Dessus ). He compares oil to a drug and makes an interesting analogy.
To be less drugged and dependent on your dealer, you must: either consume less or self-produce ...

- a EuroSolar manager is interviewed: http://www.eurosolar.de/en/
He said that in 1993 the EU passed a law which granted as many subsidies to renewable energies as to civil nuclear. Nuclear has had its share, renewable energies are still waiting ...

Duration of world reserves with constant consumption (head I did not note).

a) oil 40 years
b) 300 years coal
c) gas 80 years
d) uranium: 65 years old

- An Areva manager claims that 4th generation generators will multiply plant yields by ... 50 for the same uranium consumption, thereby increasing the duration of world reserves going to ... 3000 years!

Given that a power station already has 35% thermal efficiency, how is this possible? Breeder? Fuel regeneration?

- We see in detail the installation of Jühnde, see https://www.econologie.com/forums/biogaz-et- ... t1523.html

It is presented as a peid of nose to (idots of?) Governments claiming that energy independence is impossible. It is also the "nightmare" of companies that sell energy. An example therefore NOT to be reproduced for them.

- Decentralization and self-production of energy = unacceptable for today's multinational energy companies. The word lobby is not pronounced (I believe) but the journalists make it clear that we cannot do anything and that these companies slow down projects as much as possible ...

We speak of a "revolution from below".

- We then move on to solar: the Almeria thermodynamic solar station. See:
http://www.actu-environnement.com/ae/ne ... _3246.php4
et https://www.econologie.com/energie-mecan ... -3136.html

These projects are very promising but completely abandoned (or almost) for a long time by the public authorities ... a height ... but that is currently changing.

We see the Solar Stirling SOLO 161 engine (German) and the project manager is Solar Millennium, another German company: http://www.solarmillennium.de/

- 1% of EU fuels = biofuels for the moment

- Bioethanol: it is starving South America. In 1 year the T of corn went from 100 to 250 $. 110 biorefineries in production in the USA. Most of it dates from 2004, therefore very recent. Water for corn is also a problem.

- TOTAL does some research (lip service) on the liquefaction of biomass: grass and wood in particular.

- Growth (in the long term) of the Chinese and Indian car fleet: from 5M to 600M for India and from 12M to 500M for China.

ps: as a reminder, there are around 800M of vehicles in the world today.

- We are currently at the dawn of a 3rd energy revolution (1st = coal, 2nd = oil ...) either we did it immediately smoothly or later with more violence ... As desired. .

[Christophe]

And the last of the 3 reports:

More fuel, the end of the trip?

How will we fill up when the oil deposits dry up? Should we consider the questioning of the automobile?

SWR © SWR
Absorbing ten million tonnes of oil per day, or more than half of the world's daily production, automobile transport is by far its biggest consumer. However, within a few decades, resources will be exhausted. An alternative fuel must therefore be found. The research departments of the three big American automakers, Ford, General Motors and Chrysler, are looking for alternatives to current engines. Filmed largely in Detroit, the capital of the automotive industry, this documentary examines the various known solutions and their possible application. He presents the different "clean" energies (rapeseed, sugar cane ...), while emphasizing their limits. And wonders: will we one day have to give up the car and the incredible freedom of movement it allows?

- Very access to bioethanol, problem that this generates on the stock market prices of a food. Yet production continues to grow: + 15% in 2007!

- "Average" American farmer operation: 2000 ha of corn for ... 3 employees! We quickly understand that without fuel oil, no bioethanol 110 refineries in the USA.

- Food recovery of fermented corn dreches

- Korn is King says the farmer is very sure of him.

- The Rocky Montain Institute is much less certain (with good reason) of the interest of energy corn ... see their site: www.rmi.org (it is not invented ...)

The RMI has developed a very interesting concept: the hypercar

The hypercar is a car that consumes between 0,4 and 1,6 liters / 100 km. A real miracle at hand, since it relies on 2 mastered technologies: hybrid electric propulsion (now widely available as standard) and an ultra-light car (400 kg for a 4/5 seater), thanks to the replacement of the steel by modern alloys. Very simple in design, it costs the same price as current cars, or even less.

Source: http://www.good-news.fr/2006/sortir/hypercar/

Hypercar ebook

It gently reminds me of the Citroën Eco2000 from 1983 ... the electric motor in addition ...

- Oil consumption in the USA: 15 billion L per year.

- American manufacturers are finding it difficult to cash in on the increase in the cost of energy: pickups and other "monstrecars" have difficulty in selling. They have also suffered since the 80s from foreign competition (but that's not really the point there).

In short, the population of Detroit, stronghold of the world automobile at its peak, went from 2M to 0,9M inhabitants.

- Toyota has sold a million Prius worldwide since 1997 and has exceeded GM in terms of turnover.

- The cars of the future must use the 2 energy sources widely present in our industrialized countries: oil and electricity.

[Christophe]

Here is the precise yield difference between PV cells and a thermodynamic solar power plant, we are approaching 60% efficiency!

[jean63]

I don't know if you watched this show thanks to me or not, but I did not regret it.

Excellent summaries, Christophe, of the various reports.

What worries me in all this is that there is no quick fix if we do not significantly reduce our energy consumption (it also means all transport generally). How are the energy-consuming Americans going to lower it enough? There they are starving Mexico with their GMO corn (I suppose) cultivated on thousands of hectares with a minimum of workers and therefore a maximum of tractors and other agricultural machinery for the sole purpose of filling the tanks of cars! . I don't really have the impression that they want to lower their consumption, they want to replace oil, that's all, except in California, but a tiny minority.

The million Toyota Prius sold is a drop in the ocean.

When Europeans with their target of 20% of ENr in 2020, it makes me laugh. Indeed for France ENR = nuclear

I felt uneasy after watching this program: we go around in circles: each time there is a solution, there is a problem that goes with, except perhaps for housing, the solution of the German HLM and village .

[toto65]

I can't find a replay of the show.
Otherwise I saved it (in part) I miss 15mn from the start and the end ends with the American cars.
To share it with those interested, I would need the entirety ...
If you found the schedules. Give me a sign.
See you