Archive for the ‘air conditioning’ Category:

2025-06-19 When Will Extreme Heat Become Unlivable?

This 12 minute PBS Weathered video explains wet bulb temperature and shows some good maps and graphs. She tells how humans (and other living things) cannot keep cool when the humidity rises and causes the wet bulb temperature to rise.  The person’s core temperature rises and they have heat exhaustion or heat stroke.  This can

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2025-06-01 Dark Roof Lobby Making Your City Hotter

This is a Floodlight article about Dark Roof companies and lobbyists trying to eliminate the laws cities are passing to make roofs white.  https://floodlightnews.org/this-little-known-dark-roof-lobby-may-be-making-your-city-hotter/?ref=im-a-reader-newsletter

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2025-05-15 Redlining Shaped The Power Grid. Communities Of Color Are Still Paying The Price.

Good Floodlight article about electric grids in neighborhoods and how the poor are suffering – inequality. https://floodlightnews.org/redlining-shaped-the-power-grid-communities-of-color-are-still-paying-the-price/?ref=im-a-reader-newsletter

2025-03-21 Magnetothermal Refrigerator Is More Efficient

This system uses a heater and cooler that is fixed with transfer into moving fluids.  I wonder if they have tried changing it to a system where the heater and cooler is like a regular refrigerator where the heater and cooler moves around with the transfer into fixed locations.  So the magnetothermal metal would move. 

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2024-05-22 Immersion Cooling Servers, Datacomm Equipment

That’s hard to believe!  I would just put the equipment in a sealed rack with a lot of well filtered airflow.  Someone suggested Fluorinert. https://www.facebook.com/reel/464912799258554?mibextid=9drbnH&s=yWDuG2&fs=e

2024-04-07 Esbjerg Changes To Heat Pump City Heating System

The city of Esbjerg, Denmark is replacing its coal fired city heating system with an amazing giant heat pump, biomass boilers and waste burning boilers.  The refrigerant is CO2.  Read the description. This is a long 43 minutes but is very comprehensive and interesting.  The cost is about 40 million Euros. 

2024-01-27 Climate Sensitivity = 5+ deg. Dire Predictions, Worse Than Before

Sabine H gives us a rant about climate change. Some models give a climate sensitivity of 5 or more degrees C, meaning that we have much less time to get to net zero. If we don’t then parts of the Earth will become uninhabitable even sooner than predicted. This may lead to widespread crop failures,

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2023-09-13 EV charging Uses Less kWh Than Water Heating In Homes

Less than Air conditioning and less than heating. EV Charging Consumed Less Energy Than Water Heating In A Typical US Household In 2020

2023-08-18 Wealthiest 10% Are Source Of 40% Of Greenhouse Gas Emissions

Quote: “”The wealthiest tenth of U.S. households are the source of 40 percent of national greenhouse gas emissions, according to research published in the journal PLOS Climate.”” Quote: “”The wealthiest 1 percent of households were responsible for between 15 percent and 17 percent of emissions.”” https://thehill.com/policy/energy-environment/4157562-us-climate-emissions-attributed-richest-households-study/ I started thinking about this and guessed that some

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2022-05-05 New Washing Machine Replaces Old

My decade old GE started leaking on the floor after the bearings went out – it howled like a banshee. I went to Lowe’s and bought a new Maytag and the salesdroid wanted me to pay $40 to have the old one hauled away. I said no thanks, I’ll get rid of it. But I

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