摘要
经典热力学理论下很难对体系非平衡态下的熵产进行精确计算,需要重新建立非平衡态下的熵污染的概念。本文根据热力学第二定律关于非平衡态的研究成果,将其引入体系熵污染的研究中,从理论上揭示了任意开系的熵污染是由体系的熵产项和熵流项构成,熵流项是外部给予体系的熵变化,熵产项是体系熵变的内部效应,可以表征体系的熵污染强度,因此可以推导出具有普遍实用性的熵污染量计算模型dS=deS+diS。在此基础上,对列管换热器单根圆管换热过程的熵污染源强度组成及产生机理进行了分析,得出一般发展趋势。结果表明,此模型为优化体系设计,减少能源消耗,以资源化的观点评价体系的污染状况和综合性能打下础性。
It is difficult to accurately calculate the system entropy generation of non - equilibrium state of open system by classic thermodynamics. A new definiton of entropy production pollution（EPP） is needed to be rebuilt about non -equilibrium state. By studing entropy production pollution definiton of whole system, It is very important to know the sources and parts of the system entropy pollution, which we can estimate the clean production position and optimize the system reaction design with environmental protection opinions. Based on the second law of thermodynamics about non - equilibrium state of open system, we open out that any open system contaminated by system entropy production and entropy flow items. Entropy flow is external to system entropy, and entropy production is system of internal entropy effect, which could indicate the system entropy of pollution intensity. It can derive the universal relevance of the entropy of the pollution load calculation model dS = des ＋ diS. According to analyze system entropy pollution production forms and produce mechanism about single pipe diathermanous force heat transformation process a common development about entropy production can be put forward by these. All these researches is the basic researches for optimizing system design, reducing energy consuming and estimating system pollution state. This method is also useful to evaluate integrative characters with resource opinions.
出处
《重庆师范大学学报（自然科学版）》
CAS
2010年第4期44-50,共7页
Journal of Chongqing Normal University:Natural Science
基金
重庆市教委项目(No.KJ070810)
关键词
熵污染
熵产
清洁生产工艺
system entropy pollution
entropy pollution production
clean producing mechanism
