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All Journal Journal of Materials Exploration and Findings
Indianto, Mohammad Akita
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Techno-Enviro-Economic Approach for Electrification of Rural and Shrimp Farming Regional Development of An Isolated Island in Indonesia by Utilizing Hybrid Renewable Energy Systems Wijaya, Fiqih Akbar; Indianto, Mohammad Akita
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

One of the challenges in developing and archipelagic countries such as Indonesia is maintaining energy demand in rural and isolated areas due to difficulties in electrical distribution. For instance, in areas like Bawean Island, no additional electricity capacity has been introduced in the past year, leading to an unmet potential customer demand. One of the possible options is by utilizing Hybrid Renewable Energy Systems (HRES) that are integrated with existing fossil fuel-based energy systems to support the growing energy demand in the remote island. A case study in Bawean Island is conducted with the projected energy demand covers the energy consumption for rural electricity and development for business and industry, in this case shrimp pond agriculture industry. The energy demand is projected until 2035 with increase needs for industry is an average of 5% to 7%. A techno-enviro-economic analysis utilizing Homer Pro software is conducted to determine the optimal configuration of energy systems. Three scenarios with different configurations of solar PV, wind turbines and existing fossil fuel-based grids are simulated. In scenarios I, II, and III, annual CO2 emissions are 33.6%, 37.16%, and 47.3% lower than in the Grid system. The technical and economic research shows that Scenario I, with a 10.5 MW grid configuration and 17.25 MW photovoltaic capacity system on 26.91 hectares of land, is the optimal implementation priority. Scenario I has the lowest LCOE (0,1580 $/kWh), highest NPV ($7.910.714), and shortest payback period (9 years 7 months). This indicates the potential to enhance productive sectors, particularly shrimp ponds.
Techno-Economic Analysis of Hybrid Systems as a Solution for Electricity Supply during the Dry Season at the Bakaru Run-of-River Hydropower Plant Febri, Zamharir Aditya; Indianto, Mohammad Akita; Tobing, Sheila
Journal of Materials Exploration and Findings Vol. 5, No. 1
Publisher : UI Scholars Hub

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Within the South Sulawesi power system (Sulbagsel), the Bakaru Hydro Power Plant serves as a key facility expected to provide consistent and reliable electricity supply. However, since the Bakaru plant operates under a Run of River scheme, its energy output is highly dependent on river discharge rates. In 2024, a significant decrease in water flow was recorded between August and October, which led to a drastic reduction in power generation. To address this challenge, a hybrid energy system is proposed to ensure continuous load coverage, particularly during the dry season. The optimal configuration of this hybrid system was modeled and simulated using HOMER Pro software. The simulation results indicate that a combination of the existing Bakaru Hydro Power Plant 126 MW, Solar PV 100 MWp, BESS of 24 MWh, and a steam-gas power plant 80 MW can effectively fulfill the annual electricity demand. The proposed hybrid system yields a total annual energy output of 862,719.29 MWh, which exceeds the actual load demand by 33.6% (equivalent to 290,164.45 MWh). This energy surplus can be strategically allocated to accommodate seasonal loads or projected demand growth. From an economic standpoint, the configuration demonstrates a Net Present Cost (NPC) of USD 934 million, with Levelized Cost of Electrictricity (LCOE) of USD 0.0583 per kWh. Furthermore, the project displays promising investment viability, achieving an Internal Rate of Return (IRR) of 31.57% and a payback period of four years and a projected Net Present Value (NPV) of USD 715,487,322.
Co-Authors Febri, Zamharir Aditya Tobing, Sheila Wijaya, Fiqih Akbar