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Techno-economic analysis of green hydrogen production by a floating solar photovoltaic system for industrial decarbonization

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Clean energy 2024年第4期8卷 1-14页

作者： Rahma Muthia Anastasia Segari Putri Pramudya Mochamad Rafly Maulana Widodo Wahyu Purwanto Department of Chemical Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia Sustainable Energy Systems and Policy Research Cluster Universitas IndonesiaDepok16424Indonesia Master Program in Energy Systems Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

This study proposes a conceptual design of green hydrogen production via proton exchange membrane electrolysis powered by a floating solar photovoltaic *** system contributes to industrial decarbonization in which hydrogen blending with natural gas is proposed as an approach to smooth the energy *** proposed design addresses the challenge of supplying a continuous flow-rate of green hydrogen,which is typically demanded by industrial end *** study particularly considers a realistic area required for the installation of a floating solar photovoltaic *** enable the green hydrogen production of 7.5 million standard cubic feet per day,the required structure includes the floating solar photovoltaic system and Li-ion batteries with the nominal capacities of 518.4 megawatts and 780.8 *** is equivalent to the requirement for 1524765 photovoltaic modules and 3718 Li-ion *** assessment confirms the technical viability of the proposed concept of green hydrogen production,transportation and *** the present commercialization is hindered by economics due to a high green hydrogen production cost of USD 26.95 per kg,this green hydrogen pathway is expected to be competitive with grey hydrogen produced via coal gasification and via natural gas steam reforming by 2043 and 2047,respectively.

关键词： floating solar photovoltaics gas blending green hydrogen industrial decarbonization lithium-ion battery photon exchange membrane electrolysis

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Techno-economic analysis of a hybrid renewable energy system integrated with productive activities in an underdeveloped rural region of eastern Indonesia

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Clean energy 2023年第6期7卷 1247-1267页

作者： Alya Nurul Shafira Subhan Petrana Rahma Muthia Widodo Wahyu Purwanto Sustainable Energy Systems and Policy Research Cluster Universitas IndonesiaDepok16424Indonesia Chemical Engineering Department Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia Master Program in Energy Systems Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

The Southwest Maluku region in eastern Indonesia is considered a frontier,outermost and underdeveloped *** inhabitants live on isolated islands,including the residents of Mahaleta Village,where only 9.4%of the community have limited access to *** study aimed to design an economically feasible hybrid renewable energy(RE)system based on solar and wind energy to integrate with the productive activities of the *** study developed conceptual schemes to meet the demand for electricity from the resi-dential,community,commercial and productive sectors of the *** analysis was performed using a techno-economic *** hybrid system was designed using the HOMER Pro optimization function,and cold-storage and dryer systems were designed to support related productive *** optimized design of the hybrid RE system comprised 271.62 kW of solar photovoltaics,80 kW of wind turbines and a 1-MWh lead-acid *** found that the hybrid RE system would only be economically feasible with a full-grant incentive and an electricity tariff of$0.0808/***,the productive activity schemes were all economically feasible,with a cold-storage cost of$0.035/kg and a drying cost of$0.082/*** the hybrid RE system with productive activities can improve the economic feasibility of the energy system and create more jobs as well as increase income for the local community.

关键词： underdeveloped region hybrid renewable energy system photovoltaics wind turbine Indonesia

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Techno-Economic Analysis of Utilization Offshore Platform in the Java Sea to Produce Hydrogen with Offshore Wind Turbine-Based energy Sources 7

Techno-Economic Analysis of Utilization Offshore Platform in...

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7th Astechnova International energy Conference, ASTECHNOVA 2023

作者： Franika, Resistentio Vembre Ridwan, Muhhamad Kholid Perdana, Abram Master Program in System Engineering Universitas Gadjah Mada Jalan Teknika Utara 3 Yogyakarta55281 Indonesia Department of Physics Engineering Universitas Gadjah Mada Jalan Grafika 2 Yogyakarta55284 Indonesia Renewable Energy Systems HertfordshireWD4 8LR United Kingdom

Indonesia's geographical condition, which consists of 70 percent ocean territory, holds the potential for utilizing offshore wind turbines to provide cleaner energy. In this study, economic calculations were conducted for offshore wind turbines to generate green electricity and green hydrogen. The chosen ocean area for this endeavor is around the Papa offshore platform in the Java Sea. This area has experienced an economic decline, making it viable for repurposing as a sub-station for a powerhouse and an electrolyzer plant. Based on meteorological data analysis results, the area around the Papa offshore platform exhibits an average at height of 119 m;the wind speed is 5.5 m/*** prevailing wind direction is East Southeast (ESE), with a frequency of 25.2%. Further analysis of wind farms aimed at generating a capacity of 100.8 MW revealed an optimal potential energy generation of approximately 141,656.9 MWh per year. For scenario 1 (electricity production), the cost is $0.192/kWh. The levelized cost of hydrogen (LCOH) for scenario 2 (offshore electrolyzer) and scenario 3 (onshore electrolyzer) is $9.44/kg and $10.1/kg, respectively. To assess investment feasibility, a Net Present Value (NPV) analysis was conducted. This analysis yielded a selling price of electricity at $0.0271/kWh for the first scenario. For the second scenario, the selling price of hydrogen was calculated at $17.11/kg, and for the third scenario, it was $16.99/kg. Considering its flexibility and potential response to restrictions, the third scenario was deemed the most suitable for offshore utilization to produce clean energy. © Published under licence by IOP Publishing Ltd.

关键词： Offshore wind turbines

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The Role of Interconnected Island Networks for Decarbonising Power Sector in Large Archipelago Nation

SSRN

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SSRN 2023年

作者： Reyseliani, Nadhilah Pratama, Yoga Wienda Shafira, Alya Nurul Dowell, Niall Mac Kammen, Daniel M. Purwanto, Widodo Wahyu Sustainable Energy Systems and Policy Research Cluster Universitas Indonesia Depok16424 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Indonesia Depok16424 Indonesia Master Program in Energy Systems Engineering Faculty of Engineering Universitas Indonesia Depok16424 Indonesia Centre for Environmental Policy Imperial College London South Kensington LondonSW7 1NA United Kingdom Schlossplatz 1 Laxenburg2361 Austria Renewable and Appropriate Energy Laboratory and Energy and Resources Group University of California BerkeleyCA94720 United States

The reality in modelling the power system transition of an archipelagic country lies in the substantial investment required for interisland transmission lines and the uneven distribution of electricity demand. Approximately 72–75% of Indonesia's electricity demand is centered on Java, where the substantial population density constrains the land availability for renewable energy. Therefore, the spatial aspect in modelling Indonesian power system becomes important. This study assessed the differences in the decarbonisation of the Indonesian power system using single- and multi-region optimisation models and compared the isolated and interconnected power systems using the Integrated MARKAL–EFOM System (TIMES) Indonesia. The findings indicated that the isolated multi-region approach exhibited lower penetration of renewable energy compared to the single-region approach. Introducing interconnected power system enhanced the renewable energy mix by 2.5 times, reduced the overall system cost, CO2 storage capacity, and coal consumption by building 115 GW of interisland grid and importing 62% of electricity in Java from Sumatra, Kalimantan, and NT, which resulting in more distributed investment. However, due to the considerable distance, an interconnected power system is not considered a cost-effective solution for Papua, Sulawesi, and Maluku. Decarbonisation under coal phase-out plan helps reduce the interisland transmission system by 8.3%. © 2023, The Authors. All rights reserved.

关键词： Cost effectiveness

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Synergetic effects of multiple junction and surface hydroxyl in Cu/CuO/Cu2O/TiO2 heterostructures towards highly efficient photocatalysts for hydrogen generation

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Materials Science for energy Technologies 2025年 8卷 131-142页

作者： Subagyo, Riki Anindika, Garcelina Rizky Aufkani, Afif Akmal Zhang, Lei Ardhyananta, Hosta Burhan, R.Y. Perry Nugraheni, Zjahra Vianita Akhlus, Syafsir Bahruji, Hasliza Prasetyoko, Didik Wellia, Diana Vanda Ivansyah, Atthar Luqman Arramel Kusumawati, Yuly Department of Chemistry Faculty of Science and Analytic Data Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Center of Excellence Applied Physics and Chemistry Nano Center Indonesia Jl PUSPIPTEK South Tangerang Banten15314 Indonesia Department of Physics National University of Singapore Singapore117551 Singapore Department of Materials and Metallurgical Engineering Faculty of Industrial Technology and Systems Engineering Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Centre of Advanced Material and Energy Science Universiti Brunei Darussalam Jalan Tungku Link BE 1410 Brunei Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Andalas Padang25163 Indonesia Master Program in Computational Science Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jalan Ganesha No. 10 Bandung40132 Indonesia Instrumentation and Computational Physics Research Group Department of Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha No.10 West Java Bandung40132 Indonesia

The implementation of titanium dioxide (TiO2) as a photocatalyst material in hydrogen (H2) evolution reaction (HER) has embarked renewed interest in the past decade. Rapid electron-hole pairs recombination and wide band gap of a photo-sensitive material of TiO2 are detrimental toward the targeted catalytical reaction. In this study, we present the rational design, fabrication, photocatalytic performance of TiO2-Cu/CuO/Cu2O heterostructures (CuTi) using viable chemical reduction method. The Z-scheme and S-scheme are succesfully generated across the TiO2/CuO/Cu2O interfaces, while the Schottky junction arises on the Cu perimeters. This is evidenced from the blue shifted about 0.3 eV of Cu 2p core level determined by using X-ray photoemission spectroscopy (XPS), in combination with the formation of inverse V-shape of the Mott-Schottky plots. In addition, we find that Cu/CuO/Cu2O facilitates photon absorption range up to the visible region. The multiple heterojunction and the large number of OHsurface enhanced charge carrier transfer are associated to the suppression of photoluminescence (PL) intensity, high surface hydroxyl (OHsurface) density in CuTi probed by XPS, and fast electron transfer based on the electrochemical measurements. The presence of OHsurface inhibits the recombination of electron. A significant H2 photogeneration rate enhancement is achieved when an optimized 5 wt% Cu/CuO/Cu2O concentration is used on TiO2 to achieve 7,157.19 μmol·g−1 (1,789.30 μmol·g−1·h−1). Based on this finding, zero emission energy innitiative could be materialized under multiple heterojunctions in photocatalytic process is beneficial for enhancing the H2 production. © 2025 The Authors

关键词： Titanium dioxide

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Long-term Planning of the Fuel System in Indonesia using Optimization

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IOP Conference Series: Materials Science and engineering 2021年第1期1053卷

作者： Najma Widodo Wahyu Purwanto Master Program on Energy System Engineering Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia Sustainable Energy Systems and Policy Reserach Cluster Chemical Engineering Department Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia.

Biofuel has been considered as an option to substitute petroleum fuels and reduce dependence of fossil fuel importation and greenhouse gasess emissions. Current Indonesia's biofuel blending mandates are cannot achieved due to technical, price and financial aspects. The objectives of the study are to obtain the optimum fuel supply mix by considering the fuel quality standard, production capacity and resource availability. Long-term fuel system optimization by minimum total system cost up to 2050 is carried out using TIMES-VEDA. The results showed that if goverment does not upgrade the quality of diesel up to EURO 4 and adapted EURO fuel specification with adjustment, the optimal fuel supply mix are FAME 50%-Diesel 50% in 2020-2030 and mix of FAME 47%-HVOSMR 53% in 2035-2050. For adapted EURO specification with adjustment except the sulphur content has fuel supply mix of HVOSMR 30%-Diesel 70% in 2020, FAME 20%-Diesel 80% for 2025-2030 and FAME 47%-HVOSMR 53% for 2035-2050. For gasoline, the optimum supply mix is Ethanol 5%-Gasoline 95% in 2020 and Ethanol-Ethanol2G 20%-Gasoline 80% in the 2025-2050. The utilization of biofuels can reduce the diesel and gasoline consumption for about 67-79% and 19% and reduce carbon intensity by 65-78% and 27%, respectively.

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Effect of calcium and magnesium catalyst on pyrolysis kinetic of Indonesian sugarcane bagasse for biofuel production

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energy Procedia 2019年 158卷 431-439页

作者： Yano Surya Pradana Daniyanto Muhamad Hartono Laras Prasakti Arief Budiman Chemical Engineering Department Faculty of Engineering Universitas Gadjah Mada Jalan Grafika No. 2 Yogyakarta 55281 Indonesia Polytechnic of LPP – Plantation Training Institute Jalan LPP 1A Yogyakarta 55222 Indonesia Chemical Engineering Department Applied Sciences Faculty Delft University of Technology Mekelweeg 2 2628 CD Delft Netherlands Master Program of Systems Engineering Faculty of Engineering Universitas Gadjah Mada Jalan Teknika Utara No. 3 Yogyakarta 55281 Indonesia Center for Energy Studies Universitas Gadjah Mada Sekip K1-A Yogyakarta 55281 Indonesia

The present study aims to investigate the effect of CaO and MgO as catalyst in pyrolysis of Indonesian sugarcane bagasse (SCB) for biofuel production. Prior to being used as raw material, SCB underwent acid washing to remove its inherent Ca and Mg content. Catalytic and non-catalytic pyrolysis experiment were performed in a fixed-bed reactor within a temperature range of 20-480 o C. Thermogravimetric Analysis was used to describe the mechanism of pyrolysis and one-step global model was employed to determine the reaction kinetics. Pyrolysis stage comprised of a rapid decomposition zone (260-340 o C) and slow decomposition zone (340-480 o C). TG curve confirmed that the endothermic cellulose decomposition and volatilization was more dominant than exothermic polymerization and aromatization of lignin. Moreover, CaO provided the highest reaction kinetics with the lowest reaction order compared with catalytic pyrolysis with MgO and non-catalytic process, both in rapid and slow zone. Differential Thermal Analysis (DTA) and Differential Thermal Gravimetric (DTG) corresponded to this by showing that the energy for decomposition in non-catalytic process and using MgO and without catalyst was higher than SCB0-Ca which gave the highest conversion rate. Hence, this study shows that the addition of CaO as catalyst can improve the kinetics of SCB pyrolysis.

关键词： pyrolysis Indonesian sugarcane bagasse catalyst thermogravimetric reaction kinetic

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Aggregation of two-dimensional composite grains due to self-gravitation

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AIP Conference Proceedings 2020年第1期2219卷

作者： S. Viridi F. F. Florena F. Faizal A. Suroso Nurhasan Y. Bindar 1Nuclear Physics and Biophysics Institut Teknologi Bandung Bandung 40132 Indonesia 2Master Program in Physics Institut Teknologi Bandung Bandung 40132 Indonesia 3Nanotechnology and Graphene Research Center Universitas Padjadjaran Sumedang 45363 Indonesia 4Theoretical High Energy Physics Institut Teknologi Bandung Bandung 40132 Indonesia 5Physics of Earth and Complex Systems Institut Teknologi Bandung Bandung 40132 Indonesia 6Energy and Processing System of Chemical Engineering Institut Teknologi Bandung Bandung 40132 Indonesia

Binding force in the form of spring force binds two adjacent spherical grains and based on this interaction various structures of composite particles can be constructed. In this work only composite particles up to N = 4 are discussed, where N is number of spherical grains in a composite particle, and the forms are limited to the two-dimensional cases only. There is only one structure of composite particle for each value of N for 1 < N ≤ 2. For N = 3 there are five structures and for N = 4 there are fifteen structures. Between spherical grains from different composite particles only two types of force are considered. The first is a long-range attractive force in the form of gravitation force and the last is a short-range repulsion force in the form of normal force. The first type of force will help the aggregation process, while the second will prevent two spherical grains to collapse into a single grain due to the first. It is observed that the time required to produce the compact aggregate or T is dependent on N, where larger N makes larger T.

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The effect of temperature and biomass pre-treatment on non-catalytic gasification of Indonesian sugarcane bagasse

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AIP Conference Proceedings 2018年第1期2026卷

作者： Aldillah Herlambang Shafwan Amrullah Daniyanto Daniyanto Yano Surya Pradana Rochmadi Arief Budiman 1Chemical Engineering Department Faculty of Engineering Universitas Gadjah Mada Jalan Grafika 2 Yogyakarta 55281 Indonesia 2Polytechnic of LPP - Plantation Training Institute Yogyakarta Indonesia 3Master Program of Systems Engineering Faculty of Engineering Universitas Gadjah Mada Jalan Teknika Utara No. 3 Yogyakarta 55281 Indonesia 4Center for Energy Studies Universitas Gadjah Mada Sekip K1A Yogyakarta 55281 Indonesia

Sugarcane bagasse (SCB) gasification is a promising method that used in energy generation field. The impurities of SCB such as moisture content, ash and volatile maters will disturb the gasification process and decrease yield and quality of syngas. Pre-treatment, such as pelleting and torrefaction, can be applied on SCB to improve gasification performance in a gasifier. The aims of this experiment were to study non-catalytic gasification of Indonesian SCB for syngas production in a downdraft gasifier. This experimental investigation was focused on gasification temperature effect (800, 950 and 1050°C) and pre-treatment methods (pelleting and torrefaction) of Indonesian SCB on carbon conversion efficiency (CCE), syngas volumetric percentage and lower heating value (LHV). The result showed that the highest CCE was 88.16%, obtained at 1050°C of torrefied SCB gasification. Meanwhile, the highest LHV of syngas was 4.48 MJ/Nm3, obtained at 1050°C of pelletized SCB gasification.

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Study of cultivation and growth rate kinetic for mixed cultures of local microalgae as third generation (G-3) bioethanol feedstock in thin layer photobioreactor

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Journal of Physics: Conference Series 2018年第1期1022卷

作者： Wahyu Prihastuti Yuarrina Yano Surya Pradana Arief Budiman Akmal Irfan Majid Indarto Eko Agus Suyono Master Program of Systems Engineering Universitas Gadjah Mada Jalan Teknika Utara 3 Yogyakarta Indonesia Chemical Engineering Department Universitas Gadjah Mada Jalan Grafika No. 2 Yogyakarta Indonesia Center for Energy Studies Universitas Gadjah Mada Sekip K1a Yogyakarta Indonesia Mechanical and Industrial Engineering Department Universitas Gadjah Mada Jalan Grafika No. 2 Yogyakarta Indonesia Faculty of Biology Universitas Gadjah Mada Jalan Teknika Selatan Yogyakarta Indonesia

The increasing use of fossil fuels causes the depletion in supply and contributes to climate change by GHG emissions into the atmosphere. Microalgae indicate as renewable and sustainable energy sources as they have a high potential for producing large amounts of biomass for third-generation biofuels (bioethanol and biodiesel) feedstock. However, there are several parameters which should be considered for microalgae cultivation, such as environmental conditions, medium composition and microalgae species. The aim of this research was to study cultivation of mixed microalgae cultures (Glagah consortium and Arthrospira maxima) in a thin layer photobioreactor. Farmpion medium, Bold's Basal Medium (BBM) and Thoriq Eko Arief (TEA) medium were investigated as cultivation medium for bioethanol feedstock for 7 days. The results showed that the highest dry weight concentration of microalgae was in Farmpion medium (0.35 mg/ml) and the highest carbohydrate concentration of microalgae was in BBM (0.14 mg/ml). Thus, the optimum medium of microalgae cultivation for bioethanol feedstock was BBM because of the highest carbohydrate-dry weight ratio (0.88). In addition, mathematical approach by using Contois model was used to find out the growth rate of microalgae cultivation in each medium.

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