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Engineering360: "Diode Harvests Ambient Infrared Energy"

02/05/2018 3:07 PM

Read Engineering360 article: Diode Harvests Ambient Infrared Energy.

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Guru

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#1

Re: Diode Harvests Ambient Infrared Energy

02/06/2018 5:50 AM

Hmmm, the 2nd law of thermodynamics seems to be attracting more and more detractors and opponents these days.

How long till ThermoCongress debates an amendment to replace or repeal the 2nd law of thermo?

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Guru

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#2

Re: Diode Harvests Ambient Infrared Energy

02/06/2018 10:59 AM

Maybe the second law is just more of a guideline of sorts.....

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Guru

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#3

Re: Diode Harvests Ambient Infrared Energy

02/06/2018 5:51 PM

I read the article in, " materials today energy ". I have a question, maybe someone can answer it.

How large or small would a rectenna need to be to produce (1) volt of DC current ?

Personally I think this is a wonderful idea and I hope they can bring it to fruition .

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#4
In reply to #3

Re: Diode Harvests Ambient Infrared Energy

02/07/2018 4:27 AM

"... How large or small would a rectenna need to be to produce (1) volt of DC current ?..."

....at least 4 seconds large or small.

j/k The question is moot. Current is not measured in volts.

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#5
In reply to #4

Re: Diode Harvests Ambient Infrared Energy

02/08/2018 11:41 PM

Sorry about the moottation. Let me rephrase the question.

How large or small would a rectenna need to be to produce 1 volt DC ?

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Guru

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#6
In reply to #5

Re: Diode Harvests Ambient Infrared Energy

02/09/2018 12:26 AM

The size of the individual antennae will be based on the peak frequency attempting to be harvested. So it depends on the ambient temperature from which energy is to be harvested.

The paper linked was working on harvesting in the 28 THz neighborhood. They calculate 85 nV from their antenna with an area of 3.4 ×10-5 mm2

It is important to note the harvesting was done while a laser was applied to the rectenna and that significant efforts were needed to differentiate energy harvested vs. noise. Efficiency of the rectenna was calculated to be 1.75 x 10-14 .

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#7
In reply to #6

Re: Diode Harvests Ambient Infrared Energy

02/09/2018 1:42 AM

Thank you for your reply. I can tell you Want to help others understand information. :)

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