https://lucept.files.wordpress.com/2014 ... -light.pdf
https://lucept.com/2014/11/04/william-n ... -of-light/
Trism wrote: ↑
Mon Feb 11, 2019 9:13 am
Our electric utility is always trying to convince us to buy less of their product by suggesting that we get rid of wonderful conveniences that make life more enjoyable.
Perhaps you could add a second (and/or third) refrigerator... maybe in the garage, rec room, etc.
William Nordhaus won the Nobel Prize in economics this year.
The paper is an absolute classic and shows how the cost of 1 candlelight of light has fallen over the last 800 years.
And the paper is out of date. Because LED lights have come in, offering roughly 5-10% of the cost of 1 unit of light from an incandescent bulb since that paper was written (1998) - and less than 50% of the cost of light from those early CFLs.
It doesn't matter what we *consume* in terms of inputs it matters what *services* we get out of that consumption.
Thus US fridges got steadily worse from the 1930s (when only c. 10% of households had a fridge) to the early 1980s. A fridge built then (my mother has one) burns c. 2,000 kwhr pa.
A modern fridge, on average larger, burns c. 500-600 kwhr pa. It still provides fridge & freezer services, but at roughly 1/4 the cost in energy.
(My fridge is European, a Bosch, and is rated at 300 kwhr pa - my house is small by US standards, about 1500 sqf ).
Most people don't realize that the old "beer fridge", 25 years old, sitting out in the garage or rec room is actually consuming more energy than their main fridge. Every so often someone posts here about how they replaced a pre 1992 fridge, and noticed their electricity bill dropped c. $10 pcm.
For me, it was switching out 25 or so halogen lightbulbs from kitchens and bathrooms, replacing with LEDs - cost me about £500 (USD 700 at the time).. Electricity consumption dropped 15-20% -- I could not identify any other reason for it so doing.
I built a Net Present Value model to do it and convinced myself it was a positive NPV action
. Payback was over 5 years at the time (my electricity then was about USD 18 cents/ kwrh, it's now about 26 cents/ kwhr).