等温节流过程积耗散最小化

对一类普适传质规律等温节流过程进行了研究, 应用最优控制理论导出了对应于过程质量积耗散最小时最优性条件, 然后基于普适优化结果导出了传质规律g∝(Δ p)^m]和线性传质规律g∝Δ(μ)] 等各种特例下的优化结果, 并与熵产生最小、压力之比为常数和压力之差为常数等各种传质策略下的结果进行了比较, 给出了g∝(Δp)^1/2], g∝Δ(p)]和g∝Δ(μ)] 等各种特例下的数值算例. 本文的研究结果对于实际节流过程 和设备的最优设计与运行具有一定的理论指导意义. 关键词： 等温节流 质量积耗散 最优控制 有限时间热力学

Entransy dissiaption minimization for isothermal throttling process

A class of isothermal throttling process with generalized mass transfer law is investigated, and the optimality condition for the minimum mass entransy dissipation of the process is obtained by applying optimal control theory. The results for special cases with mass transfer laws g∝(Δp)^m] and g∝Δ(μ)] are further obtained based on the general optimization result, and the obtained results are also compared with other mass transfer strategies of the minimum entropy generation, constant pressure ratio and constant pressure difference. Numerical examples for the cases with the mass transfer laws g∝(Δp)^1/2], g∝Δ(p)] and g∝Δ(μ)] are also provided. The results obtained herein can provide some theoretical guidelines for the optimal design and operation of real throttling processes and devices.
Keywords： isothermal throttling mass entransy dissipation optimal control finite time thermodynamics