科學60秒:節(jié)能燈反成耗能元兇？
來源：滬江聽寫酷
2011-05-15 00:15
文章較難，大家聽寫填空即可~
Engineers are always ____1____ to get better energy efficiency out of our products -- like cars that guzzle less gas or light bulbs that burn brighter on fewer watts. But even if we replaced all today's bulbs with energy-sipping LEDs, the world might not see any energy savings, according to a study in the Journal of Physics D. Because the more efficient lights get, the more light we tend to use.
The researchers looked at ____2____ since the year 1700. Even though today's compact fluorescents are 500 times more efficient than candles and whale oil lamps, what we spend on ____3____ hasn't gone down. It's just ____4____ our wealth. For the past 300 years we've consistently spent just about seven-tenths-of-one-percent of our ____5____ on artificial lighting. And the researchers think this trend could continue, because many parts of the world still haven't satisfied their appetite for light.
The upside is, more lighting means more productivity. But if the goal is green living, LEDs may not be a stand-alone solution. Instead, the authors suggest coupling those LEDs with energy policies that encourage smart lighting use. Now that's a bright idea.
Engineers are always ____1____ to get better energy efficiency out of our products -- like cars that guzzle less gas or light bulbs that burn brighter on fewer watts. But even if we replaced all today's bulbs with energy-sipping LEDs, the world might not see any energy savings, according to a study in the Journal of Physics D. Because the more efficient lights get, the more light we tend to use.
The researchers looked at ____2____ since the year 1700. Even though today's compact fluorescents are 500 times more efficient than candles and whale oil lamps, what we spend on ____3____ hasn't gone down. It's just ____4____ our wealth. For the past 300 years we've consistently spent just about seven-tenths-of-one-percent of our ____5____ on artificial lighting. And the researchers think this trend could continue, because many parts of the world still haven't satisfied their appetite for light.
The upside is, more lighting means more productivity. But if the goal is green living, LEDs may not be a stand-alone solution. Instead, the authors suggest coupling those LEDs with energy policies that encourage smart lighting use. Now that's a bright idea.
plugging away
light consumption
overall lighting
increased proportionately to
gross domestic product
工程師們一直在堅持不懈地開發(fā)更節(jié)能的產(chǎn)品——例如節(jié)能汽車和節(jié)能燈泡。但《物理期刊D》的一項研究表明，即使我們把現(xiàn)在所有的燈泡都換成節(jié)能的LED，地球的能源消耗仍不會減少。因為燈泡越節(jié)能，我們就使用得越多。
研究人員研究了1700年以來的照明耗能數(shù)據(jù)。盡管現(xiàn)在的螢光燈比當時的蠟燭和鯨油燈高效500多倍，但我們花在照明上的能源并沒有減少，而是隨著我們的財富相應的增加了。過去300年以來，我們一直將0.7%的GDP花在人工照明上。研究人員認為這種趨勢會持續(xù)下去，因為世界上很多地方仍不滿足于現(xiàn)在的照明情況。
樂觀的一面則是，更多的照明意味著更高的生產(chǎn)力。但若我們的目標是綠色生活，并不能只使用LED。相反，筆者建議LED的使用應與鼓勵使用智能燈的政策掛鉤，這才是好主意。
