蓄热式燃烧最佳换向时间的计算  

Calculation of Best Switching Time of Heat Accumulating Combustion

作　　者：刘慧[1] 李亚冰[2] 陈文仲[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]中冶赛迪工程技术股份有限公司,重庆400013

出　　处：《东北大学学报（自然科学版）》2012年第2期243-246,共4页Journal of Northeastern University(Natural Science)

基　　金：国家科技支撑计划项目(2006BAB12B04)

摘　　要：为了确定蓄热式燃烧的换向时间对燃烧室的温度波动、烟气排放温度及蓄热室的整体余热回收效率的影响,需要在较高余热回收效率之下寻求最佳换向时间.本文整理了换向时间与余热回收效率之间的关系,并建立了一个数学关系式;通过关系式找出合理的换向时间,得到最高余温回收效率.作为验证,在某一特定的实际工况下计算理论换向时间,考虑预热温度和蓄热室空隙体积对换向时间的影响,并与小球的透热时间作比较,最终得到最佳的换向时间.To research the influence of switching time on the temperature fluctuations in a combustion chamber, the discharge temperature of gas and excess heat recuperation efficiency in a regenerator, the best switching time was determined with high excess heat recuperation efficiency. A mathematical expression was established according to the relationship of the switching time to excess heat recuperation efficiency. A proper switching time was obtained from the expression with the highest excess heat recuperation efficiency obtained. For validation, the reasonable switching time was calculated on the certain conditions and compared with the diathermy time. Considering the effects of preheat temperature and gap volume of the regenerator on the switching time, the best switching time can be determined.

关 键 词：换向时间 透热时间 余热回收效率 蓄热式 燃烧 

分 类 号：O642[理学—物理化学]