Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
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Lots of luscious low-hanging fruit:<br />
two Asian fab retrofit examples<br />
by RMI Senior Fellow LEE Eng Lock, Singapore<br />
◊ Big Asian back-end fab: 1997 retrofit, mainly HVAC<br />
• Cut energy use 56% (69%/chip) in 11 months with 14-month<br />
average payback; further projects then saved even more<br />
◊ STMicroelectronics’s world-class Singapore fab<br />
• ’94–97 retrofits saved US$2.2M/y with 0.95-y av. payback<br />
• ’91–97 improvements saved $30M; kWh/150mm std. wafer<br />
fell 60%—providing 80% of energy capacity for a 3.5×<br />
expansion; 80% paid back within 18 months<br />
• All retrofits were performed during continuous operation via<br />
cryogenic freeze-plugs and hot-taps (>20 each)!<br />
◊ This low-hanging fruit already fell down and is<br />
mushing up around the ankles—and the tree keeps<br />
pelting our heads with more fruit<br />
◊ If these fabs had been properly designed, none of this<br />
would be possible—but they used infectious repetitis