A design on sustainable hybrid energy systems by multi-objective optimization for aquaculture industry. (January 2021)

• Record Type: Journal Article
• Authors: Nguyen, Nhut Tien; Matsuhashi, Ryuji; Vo, Tran Thi Bich Chau
• Is Part Of: Renewable energy. Volume 163(2021)
• Page Start: 1878
• Page End: 1894
• Publication Date: 2021-01
• Subjects: Aeration -- Onsite pure oxygen -- Electrolyzer -- Renewable energy -- Fuel cell -- By-product hydrogen; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2020.10.024
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: This paper presents an optimal design for sustainable hybrid energy systems for the aquaculture sector, which inherently requires intensive energy. The designed system is energized by renewable resources to produce pure oxygen in situ through water electrolysis for oxygenation according to the changes of dissolved oxygen of species under culture. Moreover, the by-product hydrogen from the electrolysis process is used to generate backup power for an eventual power failure. The mathematical models of the system were developed for simulation and optimization to assess the performance of the system regarding technical, economic, and environmental aspects as multi-objective functions in autonomous mode as well as on-grid mode. The merits of the proposed system are demonstrated at a shrimp farm. Furthermore, the optimal results and their sensitivity analysis showed that the sustainable hybrid energy system operating in grid-connected mode, which possesses such attractive features as producing onsite pure oxygen for oxygenation and utilizing the by-product hydrogen for generating backup power, could bring significant benefits for farmers thanks to a notable reduction in the annualized cost of the system as well as CO2 emission in comparison with the conventional system, which is powered by the national grid to run common paddlewheel aerators for oxygenation. Highlights: Green technology is applied to the aquaculture industry. Pure oxygen produced onsite for oxygenation leads to higher yield and energy saving. By-product hydrogen is used for backup power. Optimal planning and design for an energy system help farmers save operation costs and reduce CO2 . Useful guidelines to instruct optimum design and operation for aquaculture farms.