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Aurel Wünsch @aurel.indoorco2map.com · 22h

Aurel Wünsch @aurel.indoorco2map.com · 1d

Ein kleiner Verbesserungsvorschlag wäre bei der Herkunft der Autos die Farben innerhalb des Kontinents ähnlicher und zwischen den Kontinenten verschiedener zu halten. Vermutlich müsste man nur Spanien und USA ändern und es würde schon viel einfacher zu erfassen sein. (Farben nur zur Hervorhebung)

Image of Stacked Area chart showing the distribution of germany BEVs by country of origin, with the original and alternative color scheme

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Aurel Wünsch @aurel.indoorco2map.com · 1d

Find super dass ihr auch die LKW / Busse gesondert ausweist - gerade dort kann sich ja recht kurzfristig eine enorme Dynamik entwickeln.

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Aurel Wünsch @aurel.indoorco2map.com · 1d

The scary thing is that they will use the fact that the can't uncover an non-existing network, to expand their surveillance and oppression again and again (actually they'll do that anyways but this gives them a digestible pretense: still didn't find antifa network so more intrusive methods needed)

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Aurel Wünsch @aurel.indoorco2map.com · 1d

Oder W*rst um gleich doppelt auszulösen.

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Aurel Wünsch @aurel.indoorco2map.com · 1d

And it's not just AI generated content which becomes more expensive/harder to process but all content as you can't distinguish easily between them.

Aurel Wünsch @aurel.indoorco2map.com · 1d

That's going to boost one of the most underdiscussed aspects about AI: while generating content/documents of all kind becomes cheaper , consuming/reading/processing them becomes more expensive for humans which will dampen a lot of the potential productivity gains at least for quite some time.

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Aurel Wünsch @aurel.indoorco2map.com · 2d

Sind jetzt eigentlich auch Saitan-Byrger, Tofu-Würst, Erbs-Worscht und Blumenkohl-Schnitsl verboten? Wie hoch muss die Levenshtein distance sein zum fleischlichen Original?

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Aurel Wünsch @aurel.indoorco2map.com · 2d

Und wenn man dadurch eben Anfahrvorgänge verringert und der Wirkungsgrad der Kraftwerke die man dafür nutzt etwas höher ist als der von den Spitzenlastkraftwerken dann ist der zusätzliche Brennstoffbedarf auch gar nicht so hoch trotz Speicherverluste.

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Aurel Wünsch @aurel.indoorco2map.com · 2d

Der noch hottere Take ist aber dass man die Batteriespeicher auch mit Gas/H2-Kraftwerken laden kann mehrmals in der Dunkelflaut solange die Residuallast zwischendurch unter der Leistung der regelbaren Kraftwerke liegt und dadurch dann trotzdem zumindest etwas Kraftwerkskapazität einsparen kann.

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Reposted by Aurel Wünsch

Aurel Wünsch @aurel.indoorco2map.com · 4d

One of the multiple goals of indoorco2map.com is to gather data about the current state of ventilation to estimate what's needed additionally (energy and costs) to achieve good ventilation in every indoor space (excluding residential areas). This thread will give a very rough estimate for Germany.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

You can have an ACH of 0.1 and near to outdoor level of "used" air if there is just a few people in a very large room or you can have an ACH of 10 and still horrible air if it is a extremely cramped location - that's why L/s per person is way more useful as metric in this use case.

Aurel Wünsch @aurel.indoorco2map.com · 4d

Bei Fragen oder Probleme gerne nachfragen (egal ob öffentlich oder via DM), Daten von Konzerten sind bislang eher spärlich - da gibt es einen gewissen Bias in der Nutzergruppe ;)

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Aurel Wünsch @aurel.indoorco2map.com · 4d

What's not included yet is the cost for adding mechanical ventilation systems to indoor spaces which currently are just naturally ventilated (and very often very badly so), which probably will be a lot higher than the energy costs, but it will also provide more thermal comfort and climate resilience

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Aurel Wünsch @aurel.indoorco2map.com · 4d

Usually I would check it more thoroughly before posting but if I made a huge mistake then Cunninghams law will accelerate progress towards a solid estimate anyways and given the importance of this topic I'll rather risk looking silly than wasting time.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

If you want to check the calculation, play around with the parameters to check for robustness or expand on it, here is the spreadsheet: docs.google.com/spreadsheets....

VentinationSimpleModel_V3.xlsx

docs.google.com

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Aurel Wünsch @aurel.indoorco2map.com · 4d

And then we just do some additions and multiplications and we get an additional electricity demand of around 5.2 TWh for the ventilation system and an additional heat demand of 7.5 TWh - which assuming a 50/50 share between Heatpumps and Gas Heatings is another 1.2 TWh Electricity and 4 TWh Gas.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

There are a few more (somewhat reasonable informed) assumptions about the exisiting ventilation levels, about the time every person spends in these ventilated areas: around 8 hours per day (another 8 sleeping and the remaining 8 either at his own home or homes of friends/relatives or outdoors).

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Aurel Wünsch @aurel.indoorco2map.com · 4d

Mechanical ventilation systems often include heat recovery which vastly reduces the heat demand of ventilation, they can reach values of more than 80% recovery but we assume here just 70% and that just 40% of the systems have such a system.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

The remainder is assumed to have natural ventilation and that 25% hit the target during the summer halfyear and just 3% during the winter. For the share which doesnt reach the target we calculate teh additional demand from adding mechanical ventilation to the target levels.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

While very efficient systems can reach values of 0.5 W/(L/s) we will conservatively use 1.75 W/(L/s) from a 15 years old study. We assume that around 25% of the non-residential shared spaces (weighted by occupancy) have mechanical ventilation already and of these 35% already reach 14 L/s per person

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Aurel Wünsch @aurel.indoorco2map.com · 4d

The energy demand for a mechanical ventilation system is often expressed as specific fan power (SFP) in W/(L/s). The target level used is 14 L/s of fresh air per person in the room, which results in a CO2-level of around 800ppm assuming light activity. We will assume dynamic adjusted ventilation

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Aurel Wünsch @aurel.indoorco2map.com · 4d

There are three ways ventilating using mechanical systems results in energy demand. Firstly the electricity needed for the ventilation system itself, mainly for the fans, secondly the increased heating demand from moving a higher amount of cold air into the rooms. We ignore cooling demand for now.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

While there is certainly a lot of potential to improve ventilation levels by just opening windows more (either manually or automatically), for the sake of simplicity the ventilation improvements calculated all use mechanical ventilation.

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Aurel Wünsch @aurel.indoorco2map.com · 4d

Disclaimer: I'm working on a more complex approach but I am reasonable certain that this simple approach used here gives a good estimate and isn't too far off (hopefully not more than by a factor 2). Currently we will just look at the energy amount and costs. Spreadsheet linked at end of thread.

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