Thermoelectric cooling: it's not great.
Technology Connections3 HN recommenders · 2025–2025
6.4M views · explainer · evergreen · Uploaded 2024-09-22
Technology Connections explains in 33 minutes why thermoelectric (Peltier) cooling is far less efficient than compressor-based refrigeration.
It is the standard link whenever a new Peltier or thermoelectric cooling breakthrough is posted.
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5 comments from Hacker News
> Did peltiers ever get efficient? Not compared to gas compression. For a relaxed take on it: [VIDEO] (Thermoelectric cooling: it's not great) Though part of the complaints about the mini fridge is due to lack of insulation. But he compares it to his usual fridge, which has a similar power draw as this 60W mini fridge, and there's a 50x difference in volume to cool.
> though less efficient than other types IIRC they are _massively_ less efficient. Relevant Technology Connections video: [VIDEO]
Obligatory video on the inefficiencies of thermoelectric cooling/Peltier elements from Techonology Connections: [VIDEO]
Mandatory Technology Connections video about Peltier cooling, "Why Thermoelectric Cooling Is Inefficient": [VIDEO]
Doubles efficiency? From what I understand, the efficiency was pretty lousy to start with: [VIDEO] Aren't there theoretical limits to this sort of cooling too? But, if this innovation causes Technology Connections to make yet another heat pumps video, I'm all for it.