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加热炉热效率计算普遍采用正平衡计算方法,该方法通过直接测量加热炉输入热量和输出热量而计算得到。为了研究燃气加热炉热效率与燃气气质参数、排烟温度、过量空气系数等可控参数的关系,对热效率的正平衡计算方法进行改进,采用反平衡热效率计算方法,通过对加热炉排烟损失、散热损失、气体未完全燃烧热损失的计算从而求得热效率。根据热效率计算方法编制计算软件,并在软件计算界面保留过程参数,可以为分析热效率影响因素、制定节能措施、评估节能效果提供基础数据。该计算方法和软件已在某油田进行现场应用,完成了不同型号燃气加热炉热效率的计算。(表8,参10)
The calculation of the thermal efficiency of the heating furnace generally adopts a positive balance calculation method, which is calculated by directly measuring the input heat and the output heat of the heating furnace. In order to study the relationship between thermal efficiency of gas heating furnace and controllable parameters such as gas tempera- ture parameter, exhaust gas temperature and excess air coefficient, the method of calculating the positive balance of thermal efficiency is improved. By adopting the method of calculating the thermal equilibrium efficiency of reverse heat, Heat loss, gas incomplete combustion heat loss calculation to obtain thermal efficiency. Compiling calculation software according to thermal efficiency calculation method and preserving process parameters in software calculation interface can provide basic data for analyzing influencing factors of thermal efficiency, making energy saving measures and evaluating energy saving effect. The calculation method and software have been applied on-site in an oilfield, and the calculation of the thermal efficiency of different types of gas heating furnaces has been completed. (Table 8, reference 10)