【摘要】 基于R-K状态方程,采用偏离函数法对空压机内绝热稳流压缩过程中的空气理论压缩功和出口空气温度进行计算,建立了多级空压机空气压缩过程的运行能耗计算模型和级间冷却过程的排气放热量计算模型。基于■分析方法,建立了用于定量分析空气压缩过程物理■损失、排气冷却过程热量■损失和多级空压机■效率的计算模型。在此基础上,分析计算了制氧体积分数和级间冷却器出口空气温度变化对制氧过程中多级空压机运行能耗和经济性的影响。结果表明:适当降低制氧体积分数、选择较低的级间冷却器出口空气温度可降低深冷空分系统的制氧能耗,并提高其经济性。更多还原

【Abstract】 Based on R-K state equation, the theoretical air compression work and outlet air temperature in the adiabatic steady-flow compression process of a compressor were calculated by deviation function method, so as to establish calculation models for the energy consumption in air compression process and the exhaust heat release in inter-stage cooling process of the multi-stage air compressor. Based on exergy analysis method, calculation models were also set up to quantitatively analyze the physical exergy loss in air compression process, the heat exergy loss in exhaust cooling process and the exergy efficiency of the multi-stage air compressor. On above basis, an analysis was conducted on the energy consumption and operation economy of the multi-stage air compressor influenced by the volume fraction of the oxygen produced and the variation of the air temperature at outlet of the inter-coolers in oxygen production process. Results show that the energy consumption and operation economy of the cryogenic air separation system could be reduced by properly reducing the volume fraction of the oxygen produced and by choosing relatively low air temperature at outlet of the inter-coolers.更多还原