'Reverse microwave oven' quickly cools drink cans

Let's assume they use a can of soda of 350ml (12oz). In the video they say it's "almost too hot to touch", let's say 60°C (140°F) and it cools to refrigerator temperature, let's say 5°C (41°F), so it's a 55°C difference. We can assume a specific heat of 1cal/g°C and a density of 1g/ml (metric units are nice). So they have to extract 19250calories. (They need to extract some calories from the can, but let's assume it's a small number.)

The 19250 calories are 80500J. They extract them in 90 seconds in the video, so they have in average 895W.

They use between 100W and 200W of electricity, let's use 200W. So the efficiency is about 4.5. In a air conditioner the usual efficiency is between 10 and 20, but it's a big device with a noisy heat exchanger. In a Peltier device the efficiency is approximately .05. The efficiency changes a lot with the temperature difference in both cases.

So, it doesn't seam to be theoretically impossible, but it looks too good to be true. The only way I think this may work if it has a big chunk of ice inside as a heat sink, so it can cool a few cans in 90 seconds, but it needs like half an hour per can to regenerate the ice using a Peltier device.

> [...] and it says fizzy drinks won't spray in your face after a spin in Juno.

Nah.