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switching time
    switching time 60s, 90s, 120s and 360s.
    换向时间60秒、90秒、120秒、360秒;
    The burner's ability is 1 MW ,with COG fuel, Switching time 73 seconds, the average output temperature of gas and air 110℃ and 1 110℃, and temperature efficiency and heat efficiency 92.47% and 90.8 % respectively. The burner uses double preheating with gas and oxygen.
    该燃烧系统燃烧能力为1.0MW,燃料采用焦炉煤气,蓄热体采用陶瓷球,燃烧器换向时间73s,烟气出口平均温度为110℃,预热空气出口平均温度为1110℃,蓄热室热效率和温度效率分别达到90.8%和92.47%。
    Establishment of the switching time of the regenerative heat exchanger
    蓄热式热交换器换向时间的确定
    The switching time's effects on the regenerative combustion
    换向时间对蓄热式燃烧的影响
    Result shows that decreasing fluid rate and shortening switching time can decrease the temperature of the exhaust gas and increase the recovery rate of waste heat.The switching time has a considerable influence on the extrusion and tension stress of the surface of honeycomb regenerator.
    结果表明 :适当降低流过蓄热体的气体流速 ,缩短四通换向阀的切换时间 ,可降低烟气的出口温度 ,提高系统的余热回收率。 频繁的蓄热和释热过程变换 ,使蓄热体格孔壁面交替受到拉应力和挤压应力的作用 ,换向时间越短 ,应力交替作用的影响越大 ;
    And the variation of temperature with time was analyzed. In addition,the effects of some parameters such as switching time,gas temperature at the inlet of regenerator,height of regenerator and specific heat of the regenerative materials on heat saturating time were discussed. It provided primarily theoretic basis for further study of regenerative heat transfer mechanism.
    在计算流体力学数值分析软件基础上,运用数值方法模拟了陶瓷蜂窝蓄热体的蓄热换热过程,得到了蓄热体及气体的轴向温度分布曲线,分析了温度随时间的变化规律,同时讨论了换向时间、烟气入口温度、蓄热体高度、蓄热材料比热等参数对热饱和时间的影响,为进一步研究蓄热式换热机理提供了初步的理论依据.
 

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