化学能梯级利用机理探讨  

PRINCIPLE OF CASCADING UTILIZATION OF CHEMICAL ENERGY

作　　者：金红光[1] 王宝群[1] 

机构地区：[1]中科院工程热物理研究所,北京100080

出　　处：《工程热物理学报》2004年第2期181-184,共4页Journal of Engineering Thermophysics

基　　金：自然科学基金项目资助(No.59925615;No.90210032);国家重点基础研究项目(No.G1999022302)

摘　　要：本文提出化学能梯级利用新概念,从理论上证明了物质作功能力(ε)、化学反应作功能力(G)和物理能作功能力(ηc)之间的内在联系,拓展了传统热力循环在物理能转换利用范畴的局限。通过CH4直接燃烧和化学链燃烧化学能品位和(火用)损失的比较,指明化学能梯级利用是降低燃烧(火用)损失的有效途径,并指出影响化学能梯级利用的关键因素,揭示了化学能梯级利用机理。This paper proposed the new concept of cascade utilization of chemical energy, which breakthrough the limitation of thermal energy conversion in the range of traditional thermal cycles, and theoretically proved the relationship of work availability between the material (exergy ε), the chemical reaction (Gibbs free energy G) and the thermal energy (Carnot efficiency ηc). By comparison of the energy level and the exergy losses in CH4-fueled direct combustion and the chemical looping combustion, it is pointed out that cascade utilization of chemical energy is one of the effective way of reducing the exergy loss in combustion. Based on the investigation of the chemical looping combustion, the principle of cascade utilization of chemical energy is provided.

关 键 词：YONG 化学能 梯级利用 化学链燃烧 热力循环 

分 类 号：TK16[动力工程及工程热物理—热能工程] TQ013[化学工程]