双热源驱动的双压海洋温差能发电系统  

Dual Pressure Ocean Thermal Energy Conversion System Driven by Dual Heat Sources

作　　者：李晓宁 欧志华 谢玉宝 杨嘉明 邓泽宇 郭淑婷 LI Xiaoning;OU Zhihua;XIE Yubao;YANG Jiaming;DENG Zeyu;GUO Shuting(School of Ocean Engineering and Energy,Guangdong Ocean University,Zhanjiang 524088,China;Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China;School of Mechanical Engineering,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]广东海洋大学海洋工程与能源学院,广东湛江524088 [2]广东海洋大学广东省南海海洋牧场智能装备重点实验室,广东湛江524088 [3]广东海洋大学机械工程学院,广东湛江524088

出　　处：《广东海洋大学学报》2023年第5期72-80,共9页Journal of Guangdong Ocean University

基　　金：广东省自然科学基金面上项目(2019A1515011551);广东海洋大学科研启动经费项目(R19014)。

摘　　要：【目的】提出一种双热源驱动的双压有机朗肯循环(DPORC)系统,以期解决传统海洋温差能发电系统效率低和核电站低温废水排放造成的水域热污染问题。【方法】建立DPORC系统,研究在不同的干工质、湿工质和等熵工质下亚临界-亚临界有机朗肯循环(SSORC)和跨临界-亚临界有机朗肯循环(TSORC)系统热效率、㶲效率和透平出口干度等性能指标的变化规律。【结果与结论】在SSORC中,R123的综合热力学性能最好,其热效率和㶲效率分别达到5.52%和56.21%;湿工质R717和R152a在透平内膨胀过程中有可能会进入两相区,损坏透平叶片;SSORC比TSORC在系统热效率和㶲效率上更具优势。本研究可为超低温热源的有效利用提供参考。【Objective】A novel dual pressure organic Rankine cycle(DPORC)system is proposed to solve the problems of low efficiency in traditional ocean thermal energy conversion systems and water thermal pollution caused by the low-temperature wastewater discharge from nuclear power plants.【Method】The DPORC system was established to study the changes in performance indicators such as thermal efficiency,exergy efficiency,and turbine outlet dryness of transcritical-subcritical organic Rankine cycle(TSORC)and subcritical-subcritical organic Rankine cycle(SSORC)systems with different dry working fluids,wet working fluids and isentropic working fluids.【Result and Conclusion】In SSORC,R123 exhibits the most favorable comprehensive thermodynamic performance in this system,achieving thermal efficiency and exergy efficiency of 5.52%and 56.21%,respectively.The wet working fluids,R717 and R152a,may enter the two-phase region during the turbine expansion process,leading to potential damage to the turbine blades.Compared to TSORC,there are more advantages in system thermal efficiency and exergy efficiency of SSORC.This study provides reference for the effective utilization of ultra-low-temperature heat sources.

关 键 词：海洋温差能 核电站废水 工质 热效率 㶲效率 

分 类 号：P743.4[天文地球—海洋科学]