工业余热利用中的能级匹配性能研究

In order to achieve high efficient use of industrial waste heat, the energy quality and quantity matches are studied from the two directions of supply and usage, so as to form the assessment and optimization method for waste heat recovery systems. Energy level – enthalpy diagram is used as the analysis tool, on the basis of improvement of the graphical expression. The energy level performance is analyzed through the optimal feasible waste heat curve, the final energy usage curve, and the intermediate energy transform process curve, which are expressed on the same energy level – enthalpy diagram. The optimal feasible waste heat curve is determined by analyzed the relative positions of the grand composite curve and the real waste heat composite curve of the process which generate the waste heat. Improvement measures for the intermediate energy transform process are analyzed on the energy level – enthalpy diagram. Then assessment indexes are proposed. Based on the energy level match performance, recovery processes are considered to be combined and optimized. The system integration theory to optimize waste heat recovery systems from the two directions of supply and usage will be developed. The project will deepen and extend the theory of process integration and the corresponding industrial applications.

以实现低位余热的高效合理利用为目标，从余热的供和用两个方向进行研究，考虑余热回收质和量的匹配，以形成余热回收系统评价与优化的方法。以能级-焓图为工具，在完善其表述的基础上，通过在同一能级-焓图上同时表述最优可行余热曲线、最终能量用户曲线以及中间转换过程曲线，来分析余热回收的能级匹配性能。通过对产生余热的过程总复合曲线与已经产生的实际余热复合曲线之间关系的分析，确定最优可行余热曲线。在能级-焓图上分析余热回收中间转换过程的特性并寻求改进途径。提出余热回收系统的评价指标。并通过能级匹配特性进行回收过程的组合优化。通过低位余热能级匹配性能的研究，发展从余热的供和用两个方向进行优化的系统集成理论。项目将深化和拓展过程系统集成的理论基础和工业应用。

以实现低位余热的高效合理利用为目标，从余热的供和用两个方向进行研究，考虑余热回收质和量的匹配，以形成余热回收系统评价与优化的方法。以能级-焓图为工具，在完善其表述的基础上，通过在同一能级-焓图上同时表述最优可行余热曲线、最终能量用户曲线以及中间转换过程曲线，来分析余热回收的能级匹配性能。通过对产生余热的过程总复合曲线与已经产生的实际余热复合曲线之间关系的分析，确定最优可行余热曲线。在能级-焓图上分析余热回收中间转换过程的特性并寻求改进途径。采用㶲效率、折功量、单位年度费用㶲性能系数等为指标，分析和比较了不同余热回收流程的余热回收特性，包括不同动力循环（有机朗肯循环、卡琳娜循环）、吸收式制冷、不同热泵循环（压缩式热泵、吸收式热泵、蒸汽喷射式热泵、第二类吸收式热泵）。通过低位余热能级匹配性能的研究，发展从余热的供和用两个方向进行优化的系统集成理论。项目将深化和拓展过程系统集成的理论基础和工业应用。