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DrQuine
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re: Printed electronics harvest energy from waste heat
DrQuine   4/4/2013 12:28:44 AM
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The "not in my backyard" syndrome typically keeps these power stations away from highly populated areas where the excess heat could be used to heat buildings. Next best is efficient energy extraction at every stage in the system (from steam to hot water to cold water).

zhgreader
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re: Printed electronics harvest energy from waste heat
zhgreader   4/3/2013 1:08:26 PM
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We have used the waste heat to rear fish, to supply central heating. however , its pity to waste those heat energy.

R Paul
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re: Printed electronics harvest energy from waste heat
R Paul   4/2/2013 4:55:27 PM
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I agree with the "no free lunch" dictum, however, there is also no sense in not availing one self to a low-cost lunch. Well aware that the intuitively obvious solution is not always viable, couldn't we take advantage of convection air currents swirling upward through the cooling towers to capture energy via wind turbines? Recognizing air flow reduction would lower cooling efficiencies, is there a middle ground where some portion of blatantly excess losses might be recaptured?

Consultofactus
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re: Printed electronics harvest energy from waste heat
Consultofactus   4/2/2013 11:38:47 AM
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The conversion of waste heat to usable power is easier said than done because of the "no free lunch clause" of thermodynamics. Besides, the idea of using TEGs to capture waste heat in generating station (silicon-germanium TEGs) is not new, and has not met with much economic success in the past due to the difficulty in economically producing vast amounts of of SiGe material (although there are dozens of other TE materials, most include one or more expensive/rare elements)...but I wish the professor good luck.

EREBUS0
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re: Printed electronics harvest energy from waste heat
EREBUS0   4/1/2013 8:02:39 PM
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I agree. The amount of wasted heat energy is staggering. A lot of our power generation wastes about 50% or more of the initial thermal energy. Even capturing a fraction of the waste would be a significant increase in power available. Just a thought.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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