In practice, the wasted heat energy may be recovered and utilized by certain equipment so that energy will be saved and environment be improved.

实践中，可以通过某种设备系统将其回收利用，既节约了宝贵的一次能源，又改善了环境质量。

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This heat can usually be recovered from the ambient air surrounding the cylinder.

这个热量通常可以从钢瓶周围的空气中得到补充。

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All the other premise parameters are unchanged except further raising the dome temperature by preheating the fuel gas with the heat recovered from waste gas.

除用回收的废气热预热燃料煤气而进一步提高拱顶温度之外，所有其他前提参数不变。

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The difference is that energy normally lost through heat in the latter two scenarios is now recovered.

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The waste heat is converted into cooling capacity, and the small heat surplus is dumped into aquifers 300 m below ground level, where it is stored and recovered in winter.

CNN: ASIANOW - TIME Asia