容克式空气预热器是热力发电厂、钢铁和化工行业回收余热，提高换热效率的重要设备。
Ljungstrom air preheater is important equipment to recover waste heat and improve heat exchange efficiency for thermal power plant, steel industry and chemical industry.
由于热力学和实际限制，发电的效率只有33%。
However, due to various thermodynamic and practical constraints, the efficiency of the plants is only about 33%.
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