排气有用能评价参数的探讨

On the Parameter Evaluating Exhaust Available Energy

本文针对废气涡轮增压系统及其排气能量利用的特点,讨论了排气有用能的评价参数以及其所必须满足的若干条件.在此基础上,根据热力学第二定律,提出以涡轮?差函数作为排气有用能的评价参数,并作了详细的理论分析.本文还利用该参数对6PA6L柴油机排气有用能的动态传递过程进行了计算,给出了排气能量从气缸传递到涡轮的损失.

Evaluating parameter for exhaust available energy in diesel engines and conditions that the parameter must be met were discussed in accordance with specific features of engine turbocharging systems and their exhaust energy utilization. Turbine exergy difference function was proposed as the parameter evaluating exhaust availability according to the second law of thermodynamics and was analysed theoretically in detail. As an example, dynamic transfer process of exhaust available energy in diesel engine 6PA6L was calculated using this parameter and exhaust energy losses occuring from cylinders to turbine were given.