基于负荷特性的直燃机排烟热回收工艺研究  

Research on Exhaust Heat Recovery Process of Direct-Fired Engine Based on Load Characteristics

作　　者：张杨椿 ZHANG Yangchun(Xi’an Central Hospital,Xi’an 710003)

机构地区：[1]西安市中心医院,西安710003

出　　处：《现代制造技术与装备》2025年第3期136-138,共3页Modern Manufacturing Technology and Equipment

摘　　要：文章针对直燃机在部分负荷工况下排烟余热利用率低、换热效率波动大等问题开展研究。通过对某型号直燃机25%~100%负荷工况下的运行参数进行系统测试,建立了描述其非线性负荷特性的数学模型。基于此特性,设计了一套“高温烟气-中压蒸汽-热水”三级耦合换热方案,并采用智能温度分级技术实现系统的动态调节。应用结果表明:改造后年均热回收效率达87.6%,系统可用率提升至98.2%,取得显著的经济和环保效益。The study tackles low exhaust heat utilization and heat exchange efficiency fluctuations in direct-fired engines under partial loads.By testing a model’s performance at 25%~100%loads,a nonlinear load characteristic model was developed.A three-stage high-temperature flue gas-medium-pressure steam-hot water heat exchange system with intelligent temperature control was designed.Post-upgrade,annual heat recovery efficiency reached 87.6%,system availability rose to 98.2%,yielding significant economic and environmental benefits.

关 键 词：直燃机 负荷特性 排烟热回收 

分 类 号：TK115[动力工程及工程热物理—热能工程]