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Thermoelectric cooling: it's not great.

Thermoelectric cooling: it's not great.

Technology Connections
3 HN recommenders · discussed 2025–2025
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About this video

Technology Connections explains in 33 minutes why thermoelectric (Peltier) cooling is far less efficient than compressor-based refrigeration.

Why it appears in the archive

It is the standard link whenever a new Peltier or thermoelectric cooling breakthrough is posted.

AI-generated summary and labels from the source dataset; verify important details against the video. Source & credits.

From the Hacker News discussion

tommiegannert · 2025-02 · rec

> 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.

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joshstrange · 2025-07 · rec

> though less efficient than other types IIRC they are _massively_ less efficient. Relevant Technology Connections video: [VIDEO]

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otikik · 2025-07 · rec

Mandatory Technology Connections video about Peltier cooling, "Why Thermoelectric Cooling Is Inefficient": [VIDEO]

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minimaxir · 2025-07 · reference

Obligatory video on the inefficiencies of thermoelectric cooling/Peltier elements from Techonology Connections: [VIDEO]

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vintermann · 2025-09 · reference

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.

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