一种新型高效海洋温差能热力循环性能研究  

PERFORMANCE STUDY ON A NEW HIGH-EFFICIENCY THERMODYNAMIC CYCLE OF OCEAN THERMAL ENERGY CONVERSION

作　　者：彭景平 葛云征 陈凤云 刘蕾 吴浩宇 刘伟民 Peng Jingping;Ge Yunzheng;Chen Fengyun;Liu Lei;Wu Haoyu;Liu Weimin(The First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China)

机构地区：[1]自然资源部第一海洋研究所,青岛266061

出　　处：《太阳能学报》2021年第5期60-66,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金青年基金(51709055);中韩海洋科学共同研究中心项目(PI-2018-3);海洋可再生能源专项资金项目(GHME2018ZC04)。

摘　　要：为提高海洋温差能发电循环效率,提出一种带有2条回热支路的新型高效海洋温差能热力循环系统,基于热力学第一定律建立新循环系统数值计算模型对其进行理论数值研究。研究分析工质浓度、透平进口压力和海水温度对循环性能的影响。研究结果表明:随工质浓度的增加,循环系统热效率和系统净输出功均先增大后减小;随透平进口压力的增加,循环热效率和净输出功均呈先增后减的趋势;循环热效率随冷海水温度的升高而降低,随温海水温度的升高而升高。另外,将提出的循环系统效率与Uehara循环、Yoon循环分别在其相同工况下进行比较,结果显示该循环系统效率最高。A new high-efficiency cycle with two regenerative branches is proposed to improve the cycle thermal efficiency of ocean thermal energy conversion(OTEC).Based on the first law of thermodynamics,a numerical calculation model of the new cycle system is established.The study analyzes the effects of working fluid mass fraction,turbine inlet pressure and seawater temperature on cycle performance.The results show that the cycle thermal efficiency and the net output of the system both first increase and then decrease with the increase of working fluid mass fraction and the inlet pressure of the turbine.Besides,the cycle thermal efficiency decreases with the increase of cold seawater temperature and increases with the increase of warm seawater temperature.Finally,the proposed cycle system has the highest efficiency comparing with the Uehara cycle and the Yoon cycle under the same conditions.

关 键 词：海洋温差能 热力学性能 系统分析 循环热效率 净输出功 透平进口压力 

分 类 号：TM913[电气工程—电力电子与电力传动]