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WINNER: LENS CULTURE STUDENT PHOTOGRAPHY AWARDS 2013
Sabine Pearlman’s WWII AMMO
2017 | Legendary Cars: Arrow, Invincible (I and II), Rocket | Design by Marcin Jakubowski
IBM solar collector magnifies sun by 2,000x (without cooking itself), costs 3x less than similar systems
Cleverly combining solar PV with solar thermal to reach 80% conversion efficiency
Concentrating the sun’s ray onto solar photovoltaic (PV) modules requires walking the fine line between optimizing power output and not literally melting your very expensive super-high-efficiency solar cells. A team led by IBM Research seems to have found a way to push back the line. They have created a High Concentration PhotoVoltaic Thermal (HCPVT) system that is capable of concentrating the power of 2,000 suns onto hundreds of triple junction photovoltaic chips measuring a single square centimeter each (they even claim to be able to keep temperatures safe up to 5,000x). The trick is that each solar PV cell is cooled using technology developed for supercomputers; microchannels inspired by blood vessels but only a few tens of micrometers in width pipe liquid coolant in and extract heat “10 times more effective than with passive air cooling.”
Waste not
The beauty is that this heat is not just thrown away. This system gets useful work out of it. So while the PV modules are 30%+ efficient at converting the sun’s light into electricity, another 50% of the sun’s energy is captured as heat and can then be used to do things like thermal water desalination and adsorption cooling. This means that the system is capable of converting around 80% of the collected solar energy into useable energy (though the electricity is of course more useful than the thermal energy).
A single collector can produce about 25 kilowatts of electricity. Below is a closeup of some PV cells where the light is being concentrated. Notice the piping to bring the liquid coolant.
"The design of the system is elegantly simple," said Andrea Pedretti , chief technology officer at Airlight Energy. "We replace expensive steel and glass with low cost concrete and simple pressurized metalized foils. The small high-tech components, in particular the microchannel coolers and the molds, can be manufactured in Switzerland with the remaining construction and assembly done in the region of the installation. This leads to a win-win situation where the system is cost competitive and jobs are created in both regions."
悟 電影【新少林寺】主題曲 主唱：劉德華 作曲：趙欽 填詞：劉德華 編曲：Adam Lee．飾墜．陳德建 監製：陳德建．李安修 無量心 生福報 無極限 無極限 生息息 愛相連 為何君視而不見 規矩定方圓 悟性悟覺悟空心甘情願 放下顛倒夢想 放下雲煙 放下空慾色 放下懸念 多一物 卻添了太多危險 少一物 貪嗔癡會少一點 若是緣 再苦味也是甜 若無緣 藏愛在心田 塵世藕斷還絲連 回首一瞬間 種顆善因陪你走好每一天 唯有心無罜礙 成就大願 唯有心無故 妙不可言 算天算地算盡了從前 算不出 生死會在哪一天 勿生恨 點化虛空的眼 勿生怨 歡喜不遙遠 纏繞慾望的思念 善惡一瞬間 心懷懺悔陪你走好每一天 再牢的謊言 卻逃不過天眼 明日之前 心流離更遠 浮雲霎那間 障眼 人心漸離間 集苦連連不斷的出現 無量心 生福報 無極限 無極限 生息息 愛相連 凡人卻視而不見 規矩定方圓 悟性悟覺悟空心甘情願 簡簡單單陪你走好每一天
http://youtu.be/xMmU5JEV0sc
http://www.littleoslo.com/lyc/home/%E5%8A%89%E5%BE%B7%E8%8F%AF-%E6%82%9F
One of these days, when we wake up from our dreams.....
