工程科学学报.第43卷，第4期：577-583.2021年4月 Chinese Journal of Engineering,Vol.43,No.4:577-583,April 2021 https://doi.org/10.13374/j.issn2095-9389.2020.01.23.001;http://cje.ustb.edu.cn 面向船舶多种余热梯级利用的TEG-ORC联合循环性能 柳长昕区，叶文祥，刘健豪，吕冠澎，赵庭祺，董景明 大连海事大学轮机工程学院，大连116026 ☒通信作者，E-mail:liu_changxin@dmu.edu.cn 摘要传统的温差发电(TEG)和有机朗肯循环(ORC)等技术难以兼顾船舶多种性质余热的不同特点，且利用率较低.本文提 出了一种TEG-ORC联合循环船舶余热梯级利用系统，研究了ORC底循环蒸发压力变化对系统输出功率、热效率、多级余热利 用量和成本等重要性能的影响.结果表明，TEG-ORC联合循环实现了发电成本和热效率的优化，在TEG/ORC底循环比为0.615 的工况下，主机烟气余热利用率随ORC蒸发压力的增加在小区间波动，系统的余热利用功率、输出功率和热效率均随ORC 蒸发压力的增加而增大，系统单位发电成本随ORC蒸发压力的增加而降低.在ORC蒸发压力达到0.9MPa时，主机烟气余 热利用率为62.15%.余热利用功率为1919.68W,输出功率为139.22W,热效率为7.25%，单位发电成本为3.09￥(kW-h. 关键词船舶能效：余热回收：梯级利用：TEG-ORC联合循环：蒸发压力 分类号TK121 TEG-ORC combined cycle performance for cascade recovery of various types of waste heat from vessels LIU Chang-xin,YE Wen-xiang,LIU Jian-hao,LU Guan-peng,ZHAO Ting-qi,DONG Jing-ming Marine Engineering College,Dalian Maritime University,Dalian 116026,China Corresponding author,E-mail:liu changxin@dlmu.edu.cn ABSTRACT High energy consumption and low energy efficiency are problems that have plagued vessels in operation for many years. Traditional technologies such as thermoelectric generator(TEG)and organic Rankine cycle(ORC)are difficult to take into account the different characteristics to various waste heat of vessels.Simultaneously,the utilization rate of vessel waste heat is relatively low.To achieve the purpose of various types of waste heat from vessels,this study presents a vessel waste heat cascade utilization device system, which is based on the TEG-ORC combined cycle.The effects of the ORC evaporation pressure on the performance of the system were analyzed,which includes the combined cycle system output power,system thermal efficiency,multi-stage waste heat utilization and power generation cost of the system.The results show that the TEG-ORC combined cycle system improves the waste heat utilization performance and the combined cycle enables the optimization of power generation cost and system thermal efficiency.Based on the condition that the TEG-ORC basic cycle ratio of 0.615,the utilization rate of flue gas waste heat generated by the main engine,fluctuates in a small interval with the increase of ORC evaporation pressure.The waste heat utilization power of each unit,output power and thermal efficiency of the system enhance with the increase in the ORC evaporation pressure.At the same time,the unit power generation cost of the system decreases with the increase in the ORC evaporation pressure.When the ORC evaporation pressure reaches 0.9 MPa, the waste heat utilization rate of the flue gas generated by the main engine is 62.15%,the waste heat utilization power of the system is 1919.68 W,the output power of the system is 139.22 W,the thermal efficiency of the system is 7.25%,and the cost of system unit power 收稿日期：202001-23 基金项目：国家重点研发计划资助项目(2017YFC14046):辽宁省自然科学基金资助项目(201601063)：中央高校基本科研业务费资助项目 (3132018255,3132019330)面向船舶多种余热梯级利用的 TEG-ORC 联合循环性能 柳长昕苣，叶文祥，刘健豪，吕冠澎，赵庭祺，董景明 大连海事大学轮机工程学院，大连 116026 苣通信作者，E-mail: liu_changxin@dlmu.edu.cn 摘    要    传统的温差发电（TEG）和有机朗肯循环（ORC）等技术难以兼顾船舶多种性质余热的不同特点，且利用率较低. 本文提 出了一种 TEG-ORC 联合循环船舶余热梯级利用系统，研究了 ORC 底循环蒸发压力变化对系统输出功率、热效率、多级余热利 用量和成本等重要性能的影响. 结果表明，TEG-ORC 联合循环实现了发电成本和热效率的优化，在 TEG/ORC 底循环比为 0.615 的工况下，主机烟气余热利用率随 ORC 蒸发压力的增加在小区间波动，系统的余热利用功率、输出功率和热效率均随 ORC 蒸发压力的增加而增大，系统单位发电成本随 ORC 蒸发压力的增加而降低. 在 ORC 蒸发压力达到 0.9 MPa 时，主机烟气余 热利用率为 62.15%，余热利用功率为 1919.68 W，输出功率为 139.22 W，热效率为 7.25%，单位发电成本为 3.09 ¥·(kW·h)–1 . 关键词    船舶能效；余热回收；梯级利用；TEG-ORC 联合循环；蒸发压力 分类号    TK121 TEG-ORC combined cycle performance for cascade recovery of various types of waste heat from vessels LIU Chang-xin苣 ，YE Wen-xiang，LIU Jian-hao，LÜ Guan-peng，ZHAO Ting-qi，DONG Jing-ming Marine Engineering College, Dalian Maritime University, Dalian 116026, China 苣 Corresponding author, E-mail: liu_changxin@dlmu.edu.cn ABSTRACT    High energy consumption and low energy efficiency are problems that have plagued vessels in operation for many years. Traditional technologies such as thermoelectric generator (TEG) and organic Rankine cycle (ORC) are difficult to take into account the different characteristics to various waste heat of vessels. Simultaneously, the utilization rate of vessel waste heat is relatively low. To achieve the purpose of various types of waste heat from vessels, this study presents a vessel waste heat cascade utilization device system, which is based on the TEG-ORC combined cycle. The effects of the ORC evaporation pressure on the performance of the system were analyzed, which includes the combined cycle system output power, system thermal efficiency, multi-stage waste heat utilization and power generation cost of the system. The results show that the TEG-ORC combined cycle system improves the waste heat utilization performance and the combined cycle enables the optimization of power generation cost and system thermal efficiency. Based on the condition that the TEG-ORC basic cycle ratio of 0.615, the utilization rate of flue gas waste heat generated by the main engine, fluctuates in a small interval with the increase of ORC evaporation pressure. The waste heat utilization power of each unit, output power and thermal efficiency of the system enhance with the increase in the ORC evaporation pressure. At the same time, the unit power generation cost of the system decreases with the increase in the ORC evaporation pressure. When the ORC evaporation pressure reaches 0.9 MPa, the waste heat utilization rate of the flue gas generated by the main engine is 62.15%, the waste heat utilization power of the system is 1919.68 W, the output power of the system is 139.22 W, the thermal efficiency of the system is 7.25%, and the cost of system unit power 收稿日期: 2020−01−23 基金项目: 国家重点研发计划资助项目（2017YFC14046）；辽宁省自然科学基金资助项目（201601063）；中央高校基本科研业务费资助项目 （3132018255，3132019330） 工程科学学报，第 43 卷，第 4 期：577−583，2021 年 4 月 Chinese Journal of Engineering, Vol. 43, No. 4: 577−583, April 2021 https://doi.org/10.13374/j.issn2095-9389.2020.01.23.001; http://cje.ustb.edu.cn