The turbines burn only 40 percent of the natural gas they would if they were fueled by natural gas alone, and better heatrecovery technology would lower that figure to 30 percent.
这些涡轮机只需要燃烧原本需要量的40%即可，而更先进的热能回收技术可以把这个值降低到 30%。
2
The ground loop itself is used to provide the source and offers an extremely efficient method ofheatrecovery.
地面循环本身是用来提供源，并提供一个非常有效的热回收方法。
3
With the increasing awareness of energy and water saving, waste heatrecovery has become an important way of energy and water saving, and is becoming popular in oil fields and other places.