基于温差发电—有机朗肯循环联合循环的铝电解槽余热综合利用系统.pdf

・6・ 2023年第4期 基于温差发电■有机朗肯循环联合 循环的铝电解槽余热综合利用系统 杨添林，莫政宇 (四川大学水利水电学院，四川成都 610065) 摘要：本文提出了一种基于温差发电-有机朗肯循环(TEG-ORC)联合循环的余热综合利用系统 。为充分利 用含有多种热源的铝电解余热资源，该系统根据其热源的不同该系统由烟气余热ORC子系统和侧壁余热ORC联 合TEG子系统组成，通过模拟计算发现有机工质的选择、蒸发温度、TEG热端温度计塞贝克系数等对余热回收综 合系统的性能有着较大影响 ，因此本文通过对比六种不同有机工质的性能及系统参数进行优化，经过优化，该铝电 解槽余热综合利用系统可实现最大输出功率182. 35kW,系统循环效率达19.2%。 关键词：电解铝；余热利用；有机朗肯循环；温差发电 中图分类号:TK11 + 5 文献标识码：A 文章编号： 1674-957X(2023)04-0006-04 Thermoelectric-Organic Rankine Cycle Combined System for Comprehensive Utilization of Aluminum Electrolysis Waste Heate Yang Tian-lin, Mo Zhen-yu (Sichuan University College of Water Resources and Hydropower Engineering,Sichuan Chendu 201804) Abstract : This article presents a comprehensive utilization system for waste heat based on a combined cycle of ther­ moelectric generatororganic Rankine cycle (TEG-ORC), lb fully utilize the waste heat resources from aluminum elec­ trolysis with multiple heat sources, the system is composed of a flue gas waste heat ORC subsystem and a sidewall waste heat ORC combined TEG subsystem according to their different heat sources. Simulation calculations found that the se­ lection of organic working fluid, evaporation temperature, and the Seebeck coefficient of TEG hot end temperature have a significant impact on the performance of the waste heat recovery system. Therefore, this article optimizes the performance and system parameters by comparing the performance of six different organic working fluids. After optimization, the comprehensive utilization system for waste heat from the aluminum electrolysis cell can achieve a maximum output power of 182. 35kW, and the system efficiency can reach 19. 2%, Key words : Electrolytic aluminum； Waste heat utilization； Organic Rankine cycle；