# August 2003 — New York Blackout¶

• You were probably 5 or 6?
• I was halfway through grad school

## It started here in Ohio

• Very hot. ⇨ high voltage lines sag, touches a tree ⇨ Ground Fault. ★ computer alarm fails ★ other locations ⇨ Load shedding begins.
• 4:40 ⇨ Power out in the major metropolitan areas in the red parts of the map.

# Vinod Khosla (Venture Capitalist) speaks at Stanford¶

• No time to play it now, but if you care the link's here for when you have time.
• Best quote: We don't want Louis Vuitton solutions, we want Walmart solutions.
• Basically, if everyone can't afford it, (like the Tesla cars) it's not a great idea
• He then advocates for painting roofs white, as a bigger contribution-per-dollar to energy efficiency than most other things people are doing.
• For me, electrifying. Reminds me of my HVAC professor (taught me welding at the local community college) who said the best thing we could do was "buy sunshades for the windows".

https://www.gsb.stanford.edu/insights/vinod-khosla-green-tech-must-first-make-economic-sense

# Agentis Energy — my new job¶

We used load disaggregation to identify discrepancies between businesses (like, an office leaving their A/C on all night long) and message them suggestions, like to put the A/C on a timer. This is paid for by utilities in states where they're required to have energy efficiency programs.

This image is from MIT because I couldn't find one from where I worked

# McDonald's¶

Maybe surprising (or not since they have so many locations) — McDonald's has a big sustainability initiative including energy efficiency. Some ideas include

• $CO_2$ monitors indoors (to turn down the volume changes on the supplementary air intake when people aren't in the restaurant)
• Using hot water from the A/C to preheat the water going into the water heater.
• And standard stuff like buying $CO_2$ offsets and solar panels...

# Oscillating combustion¶

Reduces $NO_x$ by lowering the flame temperature: pulse the flame by using an "oscillating" valve.

From US Patent 20060177785 A1, 2006

# Small change¶

Put a valve in the fuel line and run it to pulse the fuel. This pulses the heat input, and lowers the maximum flame temperature.

John Wagner's report on oscillating combustor performance (PDF)

# Shot of one of the three field test sites¶

More on the annealing process for steel coils

# Significant (numbers proprietary) reduction in NOx ¶

John Wagner's full report on oscillating combustor performance (PDF)

# Principles used¶

• Lower flame temperature ⇒ less NOx
• Less fuel concentrated in one place ⇒ lower temperature