GN
@w1ts3nd555.bsky.social
540 followers 1.8K following 1.2K posts
Architect, urbanist, gardener, ecology enthusiast, building scientist — interested in sustainability at all scales of the built and natural environment. Pro-democracy and pro-rule-of-law. Views are my own. Blog: https://w1tsend.wordpress.com/
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w1ts3nd555.bsky.social
Another national study I read concluded that ASHP alone will not cost less to run in climates colder than Detroit, due to resistance backup heat in extreme lows.

This will make it hard to convince those in the north Midwest to convert.

Given that, hybrid propane seems sensible. Can ditch piped gas
w1ts3nd555.bsky.social
Working thru the paper:

Another means of avoiding cost shock of backup resistance heat in northern climes is to instead install hybrid heat pumps and convert existing furnaces to propane, which has very low GWP. Coupled w/ envelope improvements, backup heat may only be needed for a couple weeks.
Reposted by GN
shakespeare.lol
truth is truth
To th’ end of reck’ning.
Reposted by GN
thetnholler.bsky.social
Chicago not letting Portland have all the fun 🐧
w1ts3nd555.bsky.social
I’d be interested in a study of impact reduction in a scenario where e-bikes replace some fraction of EV trips.

Energy required per mile is sooo much less, and they’re functionally like a scooter or motorcycle - perfectly suitable for most solo trips - especially those within 5-10 miles.
w1ts3nd555.bsky.social
This is something that should concern everyone.
w1ts3nd555.bsky.social
Wow, disappointing results from power generation and industrial processes. Buildings not so bad.

We can do better.
peterdutoit.com
EDGAR 2025:

“According to the latest data, global GHG emissions in 2024 experienced an increase of 1.3% compared to the levels in 2023.”

To keep under 2°C emissions should have fallen by 5.5% in 2024 and EVERY year thereafter until 2030.

Source: edgar.jrc.ec.europa....
Global GHG emission trends by sector and key years
w1ts3nd555.bsky.social
“Putting solar panels on just 3% of the land that is now used for biofuel would produce the same amount of energy, enough to power 1/3 of the world’s cars if they were EVs.”

Midwest farmers need to diversify and embrace #agrivoltaics.
ajstein.bsky.social
(2/x) … putting #solarpanels on just 3% of the land that is now used for #biofuel would produce the same amount of #energy, enough to power 1/3 of the world’s #cars if they were EVs. #Biofuels therefore emit 16% more CO₂ than the #fossilfuel they replace… www.transportenvironment.org/articles/cro...
w1ts3nd555.bsky.social
… political support, that is.

Important to explain VPPs to the public in ways they’ll understand and care about.

I’ve started pointing to graphs of generation vs demand and observing that energy storage, intelligently applied, can shave off the area of the peaks and apply it to the valleys.
w1ts3nd555.bsky.social
We need finance/incentives innovation + a groundswell of political support to push it through.

Probable scenario: energy transition stalls, but VPPs nevertheless take hold because utilities can’t build out fast enough to keep pace with data center load demand.

Lean into rising bills for support.
w1ts3nd555.bsky.social
A major obstacle is less a technical one than a political and incentives one:

Investor-owned utilities have little incentive to explore VPPs because the only way regulators allow them to grow profit is to build out more infrastructure. This biases them against distributed energy and VPP/DERs.
w1ts3nd555.bsky.social
… and scheduling smart water heaters to “bank” energy at opportune times.

Also incentivizing those with batteries and solar to sell power during peak demand times. “Buy low, sell high.” These are called Distributed Energy Resources (DER).

Your devices can make/save you money while you sleep/work.
w1ts3nd555.bsky.social
This might be the time for municipal utilities to shine. Fewer perverse incentives.

Ann Arbor, MI comes to mind.
w1ts3nd555.bsky.social
It was incentive enough to get me to finally commit to rooftop solar.
w1ts3nd555.bsky.social
“Virtual power plants” are one of the cheapest, most equitable ways to make the grid more efficient, making costly infrastructure buildout less necessary.
kevinjkircher.com
11) At the high end of the grid reinforcement cost estimate range, VPPs could reduce grid buildout costs by *$340 billion*. That's our estimate of the "money on the table" for deploying VPPs: The achievable societal value of avoiding poles-and-wires upgrades at the distribution level.
w1ts3nd555.bsky.social
This aligns with what I’ve seen elsewhere. VPPs are a clear, low-cost means of getting better use of infrastructure we already have.

Need to work on IOUs’ perverse incentive to ignore efficiency and instead build out more infrastructure (because that is how they grow profit).
w1ts3nd555.bsky.social
Ah. Answered here (no):

bsky.app/profile/kevi...
kevinjkircher.com
12) Notably, we left for future work a range of other demand-side strategies: Home batteries, appliance-integrated batteries, thermal storage, vehicle-to-home discharging, and solar panels, to name a few. We'd like to work on some or all of these in follow-up work.
w1ts3nd555.bsky.social
Does the strategic demand-side management include appliances with batteries? (Haven’t read it yet, obvs.)
w1ts3nd555.bsky.social
Milk paint, lime wash, clay, mineral paint. Each with pros and cons.
w1ts3nd555.bsky.social
Them and the frog.
w1ts3nd555.bsky.social
Whoa. Some of this is due to more built infrastructure constructed in harm’s way during this period, but you know it’s bad when insurers say climate change is a now problem and it’s changing the standard of care.
Graph showing global insurance claims due to extreme weather rising over the past 50 years.
Reposted by GN
bbkogan.bsky.social
Three key points:
1) The admin has been planning mass firings to begin in October since February
2) The work necessary to carry out mass firings is illegal during a shutdown, violating the Antideficiency Act, which carries a criminal penalty
3) This harms America, ridding us of talent and expertise
Russ Vought v @russvought
The RIFs have begun.
12:27 PM • 10/10/25 • 15K Views
w1ts3nd555.bsky.social
“Democracy depends on people who refuse to stay silent, who dare to step forward despite grave risk, and who remind us that freedom must never be taken for granted, but must always be defended – with words, with courage and with determination.”

www.nobelprize.org/prizes/peace...
Nobel Peace Prize 2025
The Nobel Peace Prize 2025 was awarded to Maria Corina Machado "for her tireless work promoting democratic rights for the people of Venezuela and for her struggle to achieve a just and peaceful transi...
www.nobelprize.org