These results can be used as a reference for optimization of polygeneration systems . the syngas generated from coal needs shifting reaction to adjust h2 / co ratio to fit the methanol synthesis requirement 由煤制得的合成气经过变换反应达到满足甲醇合成要求的氢碳比，这一过程消耗了能量但提高了甲醇产率，在不同的甲醇产率下多联产系统的效率随之改变。
3.
The shifting reaction consumed energy but increased the methanol synthesis ratio and the system efficiency . the energy method was used to analyse the effect of methanol synthesis ratio on system efficiency to show the advantages of polygeneration system 本文以能量分析的结果来说明多联产系统效率随甲醇合成产率(以接近平衡态的程度表示)的变化规律，指出了变换反应在能量利用和环境保护上的合理性。
