Journal of Guangdong University of Technology ›› 2017, Vol. 34 ›› Issue (02): 74-79.doi: 10.12052/gdutxb.160089

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Optimization of Complex Turbine Network Based on Improved System Coal Consumption Per Watt Evaluation Index

Zhu Qian-nan, Luo Xiang-long, Chen Ying   

  1. School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2016-06-21 Online:2017-03-09 Published:2017-03-09

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Abstract:

The optimization of steam power system with several different complex steam turbine units is of great realistic meaning for energy efficiency improvement and emission reduction. The reasonable evaluation criterion has great importance for the practical operation optimization. In order to agree with the enterprise existing evaluation index, a modified system coal consumption per watt (CCPW) evaluation index is put forward on the basis of enterprise CCPW. And a mixed integer nonlinear programming model (MINLP) of steam power system is established. Optimization of a chemical enterprise steam power system based on empirical single CCPW, rigorous single CCPW and modified system CCPW are conducted by using the proposed model and solving method. The results show that accurate system CCPW value can be obtained with the optimal model proposed in this research. The optimal system results based on empirical single CCPW is lower than rigorous single CCPW and the deviation is 3.12%~3.80%. It is also found that the modified system CCPW can fulfill the global optimization of steam power system by comparing total coal consumption between modified system CCPW optimization and total system coal consumption optimization. The biggest deviation between the objective function of modified system CCPW and total coal consumption is 0.03%. Therefore the practicability and operability of complex turbine network model and modified system CCPW evaluation index proposed are verified.

Key words: steam power system, complex turbine network, coal consumption per watt (CCPW), optimization, mixed integer nonlinear programming model(MINLP)

CLC Number: 

  • TK284.1

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