极地冰基浮标温差能转换技术仿真研究  

Simulation Study of Temperature Difference Energy Conversion Technology of Polar Ice-Based Buoys

作　　者：覃吕娜 王建军 QIN Lyuna;WANG Jianjun(School of Naval Architecture&Ocean Engineering,Huazhong University of Science and Technology,Wuhan430070,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430070

出　　处：《海洋技术学报》2024年第2期97-103,共7页Journal of Ocean Technology

摘　　要：为了解决北极海域海洋观测与通讯导航节点浮标的供电问题,提出利用北极海域冰面上冷空气与冰下海水之间的温差能转换为电能,为冰基浮标供电。根据北极温差的时空分布特性与冰基浮标的应用场景,提出了一种基于有机朗肯循环的冰基浮标温差能发电系统,并对其进行了建模与仿真分析。根据5种工质的热力循环性能计算结果,确定R124工质作为系统的循环工质。仿真结果表明:温差能发电系统在北极冬季两个月的总发电量为745 kWh,相当于3.72 t能量密度为200 Wh/kg的锂电池。因此,北极海域温差能转换发电系统能输出相当可观的功率与电能,显著提升冰基浮标的供能水平,提高其观测能力,延长其持续工作时间,减少破冰船对其的维护频率,从而打造冰下观测网络的关键节点,支撑北极冰下移动观测网络的构建。In order to solve the problem of power supply of marine observation and communication navigation nodes(Ice tethered platform)in the Arctic sea,the paper proposes to convert the thermal energy derived from the temperature difference between the air temperature above the ice and the seawater temperature below the ice to electrical energy for the ice tethered platform.According to the spatiotemporal distribution characteristics of Arctic temperature difference and the application scenarios of ice-based buoys,a thermoele-ctric power generation system based on the organic Rankine cycle of ice-based buoys is proposed,and it is modeled and analyzed.The overall structure of the conversion system and the preliminary selection of the working fluid of the organic Rankine cycle are described.According to analysis results of the thermodynamic cycle performance of the five working fluid,R124 is chosen.The simulation results show that the total electrical output of the thermal energy conversion system during two months of winter in the Arctic is around 745 kWh,which is equivalent to the total electrical energy of 3.72 t lithium battery(energy density of 200 Wh/kg).It is indicated that the Arctic thermal energy conversion system can output considerable power and electricity.The electrical energy can significantly improve the energy level of the ice tethered platform,and thus improve its observation capabilities and extends its continuous working time,Reduce the frequency of maintenance by icebreakers,so as to build a key node of the subglacial observation network and support the construction of the Arctic subglacial mobile observation network.

关 键 词：冰基浮标 有机朗肯循环 温差能发电 北极冰下观测 

分 类 号：P75[天文地球—海洋科学]