this post was submitted on 04 Jul 2024
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I wonder how true that is. Does it come down to effective insulation? I also thought the old refrigerants were more efficient but really bad for the environment. The only other factor is motor/pump.
Compressors are variable and much more efficient. More efficient and variable speed fan motors along with more efficient blade design. Insulation now is drastically better than glass wool of the past. Electronics are able to be integrated in order to provide more fine grain control and overall design has been improved just due to efficiency standards being placed on a bright yellow sticker. In the past design and component choices never really considered efficiency, while efficiency doesn’t always win out it’s a weighted factor and influences the overall engineering and design in ways that just didn’t happen before efficiency regulations came about.
Insulation tech is better, yes, but also the insulation of a 40 year old fridge is by now totally fucked.
Please explain how fridge insulation degrades with age.
I would assume it’s made of something chemically stable and protected from the environment by the fridge casing.
The doors, rubbers, etc definitely degrade very fast. The walls probably not so fast, but the casing also gets beaten up.
Rubber seals wear out yes, but how does painted steel, unless the fridge is at the bottom of a lake?
Nice, it's super interesting how far we've progressed.
https://appliance-standards.org/blog/how-your-refrigerator-has-kept-its-cool-over-40-years-efficiency-improvements
Here's a good article. From 1970-s to 2014 power use of refrigerators decreased by 4 times. My modern European fridge only uses 270kWh per year, which is even further decrease.
You really do not want to still use a fridge from 1970-s.
Edit: changed Wh to kWh.
I think you meant 270kWH instead of 270WH.
Yes, my bad.
Nooo, thats a couple of mW, no way. Maybe its a typo and you neant daily with a bit more than 10W power, even that is fairly low. The last time I measured ours it was about 30W average... (also europe, about 10yo)
That's a typo, my bad. Fixed my comment.