In order to improve boiler heat efficiency, waste heat must be fully recovered.
为了提高锅炉热效率，必须充分回收烟气余热。
Heat efficiency of steam injection boiler is generally low in oilfields. Flue heat loss is the main factor affecting boiler heat efficiency and depends on flue gas temperature and volume.
油田注汽锅炉热效率普遍偏低，排烟热损失是影响锅炉热效率的主要因素，而排烟热损失决定于排烟温度和排烟量。
The effective use of energy in an industrial plant heating system depends on the efficiency of boiler, heat consuming equipment as well as heat transmission in the system.
工厂供热系统的能源利用率取决于锅炉热效率、用热设备和管网输送热效率的高低。
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