Does anyone use this amazing apparatus?
I'm wondering if you can pour cold water in it and get a hot espresso (which, well, should be hot by definition)? If so, how does the heat come about?
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1 Answer
Well according to the video presented on the website you have to provide hot water.
To my understanding of the machine's principle as well as physics there is absolutely no way it could produce hot coffee from cold water. The confusing quote from the FAQ
Minipresso produces at ambient condition (75°F, 24°C), an espresso at perfect temperature (152°F, 67°C in cup) with a nice compact and persistent crema on top.
actually is about temperature loss during the process.
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Can you elaborate on what you mean by temperature loss? Commented Apr 28, 2015 at 20:41
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The water loses the temperature by heating its containers.– LamorakCommented Apr 28, 2015 at 21:12
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That makes sense, although one would expect some offset of that with the increased pressure. Commented Apr 28, 2015 at 21:50
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1We are talking about liquid, the pressure does not considerabely affect the temperature. Not as much as with gases.– LamorakCommented Apr 28, 2015 at 21:55
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1You are overthinking it :) the temperature change caused by pressuring the air does not really matter– LamorakCommented Apr 29, 2015 at 6:13