Moreover, the energy saving efficiency is 5.0%、7.8%、1.3%for each part, and the total energy saving rate is 9.8% which is very obvious.
其中改变冷却水进口水温的方案是不节能的,而前三种控制方法的节能率分别为5.0%、7.8%、1.3%,冷源与水系统的总节能率为9.8%,节能量是相当显著的。
参考来源 - 中央空调冷源与水系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Per kilometers cost price decrease from 3000 yuan to 300 yuan, so it has remarkable energy-saving efficiency.
修井成本从每千米井深3000元下降到300元左右，节能效果明显。
Electric supply of filament adopts constant voltage device, which has high voltage stabilizing accuracy, long life and distinct energy-saving efficiency.
灯丝供电采用恒压器，稳压精度高，寿命长，节能显著。E。
By 2007, DuPont was saving $2.2bn a year through energy efficiency, the same as its total declared profits that year.
直至2007年，杜邦通过提高能源效率，每年能节省22亿美元，这与其当年公布的总利润相当。
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