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Thu Mar 25th, 2021 at 02:26:37 AM EST
Making a wooden solar insolation visualization
https:www.makingdatatangible.com/solar - program to help you make your own
https:/pysolar.readthedocs.io/en/latest - a collection of Python libraries for simulating the irradiation of any point on earth by the sun
Editorial Comment: possibly a useful tool for those thinking about solar in relation to zero net energy
District heating in Sweden
World's largest PassivHaus-certified office building
Saudi Arabia to build a zero emissions city
Sustainable Housing Ownership Project, Thunder Valley Community Development Corporation
Gothenburg, Sweden is developing the world's first large-scale zero-emissions city zone
Ohlone College - 185,000-square-foot net zero energy development
UK prefab low energy homes coming to scale? An estimated 30,000 in the pipeline
Leeds Climate Innovation District
Deep Energy Retrofit for Triple Deckers
Oregon State University goes for net zero in new building
ML King Open/Cambridge Street Upper School in Cambridge, MA achieves net zero emissions
Net zero home development with 3D printed components
Years of Zero Net Energy links at http://solarray.blogspot.com
They have gone into a few old buildings, gutted them, replaced all of the mechanical systems, and made them into practically modern buildings. I have lived in Worcester; most of the triple deckers there were built between 1880 and 1920 and are in bad condition. They need a LOT of work to bring up to modern standards.
But the cost numbers do not come close to working out. And the number of such buildings that would need to be retrofitted is huge. And when you're done, you are still not close to zero net energy with gas furnaces in the basements.
I recently obtained an estimate to replace the conventional HVAC system in my small house with a heat pump, it came to $30,000. That is far beyond the financial reach of almost all of the property owners in the neighborhood. The payoff time at current utility rates approaches a century.
The scale of the problem is still not internalized.
Jimmy Carter's 1979 energy plan called for insulating 90% of our homes to higher standards by 1986 so at one point we had the ambition, or at least Carter did. The earliest Green New Deal legislation called for making all public housing net zero energy within 10 years, at least in the draft I read.
Solar IS Civil Defense
Now, having thought about it for a year, it seems likely that I will not bother to buy an electric car. The closest I can get to a net zero energy transportation system (other than taking the bus that stops a block from my house) is to buy a second-hand hybrid. It's already been built, it uses a small amount of gasoline, and is a lot cheaper.
(Reality is that I plan to keep my existing hybrid for another decade.)
That raises the question of how to convince people to replace their existing vehicles with EVs. If you take an EV price of $30,000 and compare it to a used hybrid price of say $5000, it would take a $25,000 state subsidy to even out the purchase price.
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