A multistage operitaon improves the thermal efficiency. 多层操作可以提高热效率。
Furthermore, its thermal efficiency is reached to 75%. 其热效率达75%25，排烟温度降至150℃以下，节能30%25－50%25。
Fast heating, high precision of tempt control and high thermal efficiency. 加热速度快，控温精度高，热效率高。
The actual measurement results indicate that a boiler thermal efficiency of 92.92% can be attained, over 30% higher than that of the boiler before modification and more than 4% higher than that of boilers with the same capacity currently available. 实测结果锅炉热效率达到92.
Thermal balance and thermal efficiency of furnaces in metallurgical industry. 冶金炉热平衡和热效率。