摘要
审视了传热和传质强化以及能量传递过程系统优化设计方法,指出了强化能量传递过程推动力与降低能量耗散的矛盾。基于场协同原理和火用传递过程动力学理论,导出了火用传递速率与能量损耗(火用损)及其与能量传递过程推动力的热力学关系,表明了强化能量传递过程推动力与降低能量耗散矛盾的统一性。进一步给出优化设计能量传递系统的热力学判据。依此分析了热传导和对流传热单元过程的优化设计方法。结果表明,可以通过协调不同驱动力之间的关系及其驱动力的大小,实现强化能量传递和降低能耗之间的权衡。该热力学判据具有普适性,场协同原理和最小熵产原理为该判据特例。
The optimization methods to enhanced heat and mass transfer are reviewed. The contradiction between enhancing the driving force of energy transfer and decreasing energy or exergy dissipation is discussed. Based on the field synergy principle and exergy transfer dynamic equation, the thermodynamic relationship between exergy transfer rate and energy or exergy dissipation is obtained. The thermodynamic criteria for designing and optimizing energy transfer systems are suggested. The criteria are applied to the design and optimization of conduction and convective processes of heat transfer of a case. The results show that the trade-off between enhancement of energy transfer and decrease of energy or exergy dissipation can be controlled by coordinating the intersection angles or strength of different driving forces.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2007年第2期9-14,共6页
Journal of North China Electric Power University：Natural Science Edition
基金
国家自然科学基金项目资助(20376078)
关键词
能量传递
场协同
优化设计
热力学判据
energy transfer
field coordination
optimum design
thermodynamic criteria
