危废焚烧锅炉饱和蒸汽驱动有机朗肯循环系统热力学分析

Thermodynamic Analysis of the Organic Rankine Cycle Driven by Saturated Steam from the Hazardous Waste Incinerator

危险废弃物焚烧处理过程中产生的热量通常用于生产饱和蒸汽以供应工业园区的蒸汽、热量等需求,也可以用于低温发电。分析了饱和蒸汽驱动有机朗肯循环(ORC)系统做功时的热力学特性。通过基本工况下蒸汽潜热型热源与ORC系统的热匹配特性分析,提出3种优化措施,并研究了单一优化和组合优化措施下以及不同工况下的系统热力学性能。结果表明,组合优化可使系统获得更优的性能,相对于基本工况,优化后的工况下最大净输出功为3 193.81 kW,提高了170.46%;热效率为23.34%,提高了30.25%;总[火用]效率为66.25%,提高了41.80%。

Heat generated during the incineration of hazardous waste is usually used to produce saturated steam to supply steam,heat and other needs for industrial parks,which can also be used for low-temperature power generation.The thermodynamic performance of the saturated steam-driven organic Rankine cycle(ORC)system was analyzed.Based on thermal matching analysis of the steam latent heat source and the ORC system under the basic working condition,three optimization measures were proposed,and the thermodynamic performances of the system with single optimization or combined optimization measures under different working conditions were studied.Results show that the combined optimization method can make the system achieve better performance,and the maximum net output work is 3193.81 kW,which is increased by 170.46%compared with the basic working condition.Accordingly,the thermal efficiency is 23.34%with an increase of 30.25%,and the total exergy efficiency is 66.25%with an increase of 41.80%.