Experimental investigation on the performance of a Solar-Ocean Thermal Energy Conversion system based on the Organic Rankine Cycle

被引：11
作者：
Gao, Wenzhong [1 ]
Wang, Fei [1 ]
Tian, Zhen [1 ]
Zhang, Yuan [1 ]
机构：
[1] Shanghai Maritime Univ, Merchant Marine Coll, Shanghai 201306, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2024年 / 245卷
基金：
中国国家自然科学基金;
关键词：
S-OTEC; Organic Rankine cycle; Working fluid flow rate; Solar hot water temperature; Power generation; OFF-DESIGN PERFORMANCE; CLOSED OTEC CYCLES; WASTE HEAT; ORC; SIMULATION;
D O I：
10.1016/j.applthermaleng.2024.122776
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
To improve the performance of the Ocean Thermal Energy Conversion (OTEC) system based on the Organic Rankine Cycle (ORC), a solar-assisted cycle is added, and the power generation experimental setup for the SolarOcean Thermal Energy Conversion (S-OTEC) system has been constructed. Through energy and exergy analysis, the effects of solar hot water temperature and working fluid flow rate on the components and system performance are investigated, and the performance differences between S-OTEC and OTEC at the same seawater temperature and working fluid flow rate are compared. The results show that: in the S-OTEC system, as the solar hot water temperature is increased from 54 degrees C to 72 degrees C, the isentropic efficiency of the working fluid pump and expander is improved, but the heat transfer coefficient of the heat exchanger is decreased. Futhermore, the thermal efficiency, power generation efficiency, and exergy efficiency increase in the ranges of 2.02-3.26 %, 2.93-3.15 %, and 37.93-41.01 %, respectively. When the working fluid flow rate is increased from 124.33 kg/h to 216.73 kg/h, the isentropic efficiency of the working fluid pump and expander as well as the heat transfer coefficient of the heat exchanger are improved. Additional, the thermal efficiency, power generation efficiency and exergy efficiency increase in the ranges of 2.05-2.75 %, 2.46-2.97 % and 38.01-48.13 %, respectively. What's more, the thermal efficiency, power generation efficiency and exergy efficiency of the S-OTEC system can be increased by 154.32 %, 39.33 % and 27.87 % respectively compared to the OTEC system.
引用
收藏
页数：16
相关论文
共 45 条
[1]   Off-design performance analysis of a closed-cycle ocean thermal energy conversion system with solar thermal preheating and superheating [J].
Aydin, Hakan ;
Lee, Ho-Saeng ;
Kim, Hyeon-Ju ;
Shin, Seung Kyoon ;
Park, Keunhan .
RENEWABLE ENERGY, 2014, 72 :154-163
[2]   Experimental research on the influence of system parameters on the composition shift for zeotropic mixture (isobutane/pentane) in a system occurring phase change [J].
Bao, Junjiang ;
Zhao, Li .
ENERGY CONVERSION AND MANAGEMENT, 2016, 113 :1-15
[3]   Techno-economic analysis of closed OTEC cycles for power generation [J].
Bernardoni, C. ;
Binotti, M. ;
Giostri, A. .
RENEWABLE ENERGY, 2019, 132 :1018-1033
[4]   Recent progress in organic Rankine cycle targeting utilisation of ultra-low-temperature heat towards carbon neutrality [J].
Cao, Jingyu ;
Zheng, Ling ;
Zheng, Zhanying ;
Peng, Jinqing ;
Hu, Mingke ;
Wang, Qiliang ;
Leung, Michael K. H. .
APPLIED THERMAL ENGINEERING, 2023, 231
[5]   Theoretical and experimental research on the thermal performance of ocean thermal energy conversion system using the rankine cycle mode [J].
Chen, Fengyun ;
Liu, Lei ;
Peng, Jingping ;
Ge, Yunzheng ;
Wu, Haoyu ;
Liu, Weimin .
ENERGY, 2019, 183 :497-503
[6]   Experimental study on an open-drive scroll expander integrated into an ORC (Organic Rankine Cycle) system with R245fa as working fluid [J].
Declaye, Sebastien ;
Quoilin, Sylvain ;
Guillaume, Ludovic ;
Lemort, Vincent .
ENERGY, 2013, 55 :173-183
[7]   A transient model for clean electricity generation using Solar energy and ocean thermal energy conversion (OTEC)-case study: Karkheh dam-southwest Iran [J].
Dezhdar, Ali ;
Assareh, Ehsanolah ;
Keykhah, Sajjad ;
Bedakhanian, Ali ;
Lee, Moonyong .
ENERGY NEXUS, 2023, 9
[8]   A conceptual framework for waste heat recovery from compression ignition engines: Technologies, working fluids & heat exchangers [J].
Douadi, Oumaima ;
Ravi, Rajesh ;
Faqir, Mustapha ;
Essadiqi, Elhachmi .
ENERGY CONVERSION AND MANAGEMENT-X, 2022, 16
[9]   Thermodynamic process control of ocean thermal energy conversion [J].
Fan, Chengcheng ;
Wu, Zhe ;
Wang, Jiadian ;
Chen, Yongping ;
Zhang, Chengbin .
RENEWABLE ENERGY, 2023, 210 :810-821
[10]   Exergoeconomic analysis and comparison between ORC and Kalina cycles to exploit low and medium-high temperature heat from two different geothermal sites [J].
Fiaschi, D. ;
Manfrida, G. ;
Rogai, E. ;
Talluri, L. .
ENERGY CONVERSION AND MANAGEMENT, 2017, 154 :503-516
12345