二次进气螺杆机补气－压缩过程的热力学分析

A Thermodynamic Analysis of the Suction and Compression of a Screw Compressor with Secondary Suction

二次进气螺杆机的技术特征是增加了补气压缩过程，通过对这一特定热力学过程的损耗分析，导出了二次进气螺杆机绝热压缩过程的数学模型。该模型包含了单级螺杆机的先验信息，可用于对中压补气过程不可逆损失的定量估计，对完善和改进二次进气螺杆机的节能潜力，具有较大的工程实用价值。

Ascrew compressor withsecondary suction is characterized by an additional suctlon-compression process at intermediate pressure,Based on a dissipation analysis, a mathemati-cal model for the adiabatic compressing process in the screw compressor with seconday suc-tion is developed.The a priori information on the original single-step compressor is taken in-to account in the model,which can therefore be used to quantitatively evaluate the irre-versible loss during secondary stiction.