Optimal Design of a Hybrid Power System for a Remote Fishpond Based on Hydro-Turbine Performance Parameters

Abstract

This paper proposes an optimal solution for the design of a hybrid power system that will supply a remote fishpond in eastern Serbia. In terms of structure, this off-grid system should be a hydro-photovoltaic-diesel-converter-battery setup. The optimization objectives are to minimize total net present cost (NPC) and greenhouse gas (GHG) emissions and to maximize total annual electricity generation based on the modification of hydro-turbine performance. This study considers the following three cases of a hydro-turbine with fixed propeller blades: having fixed guide vanes, for the annual average flow rate-Case 1; having adjustable guide vanes, for smaller flow rates-Case 2 and having adjustable guide vanes, for higher flow rates-Case 3. The optimization is performed using HOMER Pro v. 3.16.2 software. The results show that the total NPC, levelized cost of energy (COE) and GHG emissions in Case 3 are 16.6%, 16.8% and 13.1% lower than in Case 1, and 8.1%, 8% and 11.7% lower than in Case 2, respectively. It is also found that the total annual electricity generation and power output from the entire system in Case 3 are 33.3% and 1.2% higher than in Case 1, and 11.9% higher and not different than in Case 2, respectively.

Optimal Design and Techno-Economic Analysis of a Hybrid System to Supply a Remote Fishpond with Electricity and Heat

“…2. The water is then directed to the propeller S-turbine using an 8 m-long pipe with a diameter of 0.5 m. The S-turbine propeller was first designed and constructed with fixed propeller blades, but for the purposes of the research conducted in [4] and [31], it was optimised for operation with flow rates in the range of 90 l/s to 350 l/s. This hydro-turbine has a net head of 2.9 m and an efficiency of 85.37 %.…”

“…Due to the inaccessibility of certain isolated sites, powering them can be very difficult or too expensive. One of such sites is the Jablanica trout pond, which was built next to the Radovanska Reka mountain river in eastern Serbia [4] and which is taken here as a case study.…”

“…In [5], an optimal design of a hybrid system with a photovoltaic (PV) generator of 1 kW, 8 batteries of 200 Ah, and an inverter of 0.2 kW was proposed for the aeration of a fishpond in Sleman Regency of Yogyakarta. The techno-economic analysis performed by the authors in [4] showed that by modifying the performance parameters of a propeller Sturbine, it is possible to minimise total net present cost (NPC), levelized cost of energy (COE), and GHG emissions, and to maximise total annual electricity generation. To supply electricity to a rural area in India, an off-grid solar/wind/biogas/biomass/fuel cell (FC)/battery hybrid system was considered in [6].…”