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"ABSTRAKBiomechanical energy-harvester merupakan suatu perangkat yang menangkap energi potensial yang dihasilkan selama pergerakan manusia untuk dikonversikan menjadi energi listrik. Sustainable Energy Floor (SEF) merupakan suatu biomechanical energy-harvester yang akan dikembangkan dan diaplikasikan pada lobi gedung K Fakultas Teknik Universitas Indonesia. Sebagai langkah awal dalam mengembangkan SEF, maka pada penelitian ini dilakukan analisis biomekanik dari kegiatan berjalan untuk menentukan atribut design SEF. Data dalam penelitian ini diperoleh dari eksperimen yang diadakan di laboratorium Ergonomics Centre Departemen Teknik Industri Universitas Indonesia dengan menggunakan force plate sebagai alat ukur utama, dengan responden civitas academica pria berusia 19-35 tahun di FT UI. Eksperimen dirancang dengan general factorial design dan melibatkan dua macam faktor, yaitu lantai dan alas kaki. Respon yang diukur dalam penelitian ini terdapat tiga macam, yaitu Ground Reaction Forces (GRF), Energi Potensial, dan Required Coefficient of Friction (RCOF). Selain itu, dalam penelitian ini juga dilakukan evaluasi tingkat ketidaknyamanan dengan menggunakan skala Borg. Hasil penelitian menunjukkan bahwa atribut design yang dipilih untuk SEF adalah perubahan ketinggian lantai sedalam 5 cm karena menghasilkan gaya vertikal dan Energi Potensial tertinggi dibandingkan perubahan ketinggian lantai lainnya. Selain itu, RCOF yang dihasilkan oleh lantai dengan perubahan ketinggian sedalam 5 cm masih lebih kecil dari koefisien gesek material porcelain sehingga lantai tersebut masih aman digunakan.

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ABSTRACTBiomechanical energy-harvester is a device that captures potential energy generated during human movement to be converted into electrical energy. Sustainable Energy Floor (SEF) is a biomechanical energy-harvester that would be developed and applied at the lobby of K building Faculty of Engineering, Universitas Indonesia. As an initial step in developing SEF, this research analyzed the biomechanics of walking activities to determine the design attributes of SEF. The data in this study were obtained from experiments conducted in the laboratory of Ergonomics Centre, Industrial Engineering Department, Universitas Indonesia using force plate as the primary measurement tool. Experiments designed with the general factorial design involving two kinds of factors, namely the floor and footwear. There are three kinds of responses that were measured in this study, including Ground Reaction Forces (GRF), Potential Energy, and the Required Coefficient of Friction (RCOF). In addition, this study also evaluated the level of discomfort using the Borg’s scale. The results showed that the selected design attributes for SEF is the floor whose height is changing about 5 cm, because it can generate the highest vertical force and potential energy compared to other floors. In addition, RCOF generated by this attribute is still smaller than the available coefficient of friction of porcelain, so that the floor with this attribute is safe to use."

"The global transition to sustainable energy necessitates efficient, eco-friendly hydrogen production methods. Solid Oxide Electrolysis Cells (SOECs) are promising for green hydrogen due to their high efficiency and ability to utilize waste heat. This research optimizes sintering temperatures for the LSCF-GDC/GDC | YSZ | Ni-YSZ cell configuration to enhance SOEC performance and longevity. The study examines varying sintering temperatures (800°C, 900°C, and 1000°C) and their impact on structural and electrochemical characteristics, using SEM-EDX. The findings reveal that higher sintering temperatures promote the formation of SrZrO3. Additionally, the research examines the delamination behavior of the anode at different temperatures, highlighting the critical role of temperature in maintaining structural integrity. At 1000°C, complete delamination occurs, whereas partial delamination at 900°C and no delamination at 800°C emphasize the need for precise temperature control. This delamination is hypothesized to be caused by is the mismatch in thermal expansion coefficients (TECs) between different cell materials. This study contributes to the ongoing efforts to optimize SOEC technology, providing valuable insights into material behavior under high-temperature conditions and guiding future advancements in sustainable hydrogen production.

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Transisi global menuju energi berkelanjutan memerlukan metode produksi hidrogen yang efisien dan ramah lingkungan. Sel Elektrolisis Oksida Padat (SOEC) menjanjikan untuk hidrogen hijau karena efisiensinya yang tinggi dan kemampuannya memanfaatkan panas limbah. Penelitian ini mengoptimalkan suhu sintering untuk konfigurasi sel LSCF-GDC/GDC | YSZ | Ni-YSZ guna meningkatkan kinerja dan umur panjang SOEC. Studi ini memeriksa berbagai suhu sintering (800°C, 900°C, dan 1000°C) dan dampaknya terhadap karakteristik struktural dan elektrokimia, menggunakan SEM-EDX. Temuan mengungkapkan bahwa suhu sintering yang lebih tinggi mempromosikan pembentukan SrZrO3. Selain itu, penelitian ini memeriksa perilaku delaminasi anoda pada berbagai suhu, menyoroti peran penting suhu dalam menjaga integritas struktural. Pada suhu 1000°C, terjadi delaminasi lengkap, sedangkan delaminasi parsial terjadi pada suhu 900°C dan tidak terjadi delaminasi pada suhu 800°C, menekankan perlunya kontrol suhu yang tepat. Delaminasi ini diduga disebabkan oleh ketidakcocokan koefisien ekspansi termal (TEC) antara bahan sel yang berbeda. Studi ini berkontribusi pada upaya berkelanjutan untuk mengoptimalkan teknologi SOEC, memberikan wawasan berharga tentang perilaku material dalam kondisi suhu tinggi dan membimbing kemajuan masa depan dalam produksi hidrogen berkelanjutan."

"Transisi energi berkelanjutan merupakan salah satu isu prioritas pada Presidensi G20 Indonesia. Sebagai upaya untuk mempercepat transisi energi berkelanjutan, pemerintah Indonesia menargetkan bauran energi dari energi baru terbarukan sebesar 23% pada tahun 2025, yang didominasi oleh Pembangkit Listrik Tenaga Surya (PLTS). Selain itu, penerapan sistem PLTS atap juga didukung oleh peningkatan nilai keekonomian melalui ditetapkannya Peraturan Menteri ESDM No. 26 tahun 2021. Dalam skripsi ini dilakukan studi mengenai penerapan sistem PLTS atap pada Gedung Produksi II PT. ON untuk mengetahui potensi produksi energi, potensi penghematan energi yang berasal dari grid, potensi ekspor energi kepada grid, serta besar kapasitas optimal bagi sistem tersebut. Studi pada skripsi ini dilaksanakan dengan menggunakan simulasi berbasis perangkat lunak PVSyst melalui metode trial-and-error. Hasil studi menunjukkan bahwa rancangan sistem PLTS atap Gedung Produksi II PT. ON dengan kapasitas sistem maksimal dapat memproduksi energi sebesar 266955 kWh per tahun. Nilai tersebut setara dengan 115% dari konsumsi energi tahunan PT. ON. Berdasarkan kelebihan produksi energi per tahun sebesar 15% tersebut, dapat diketahui bahwa kapasitas optimal bagi sistem PLTS atap Gedung Produksi II PT. ON adalah sebesar 171 kWp. Melalui kapasitas sistem optimal tersebut, maka seluruh produksi energi dari sistem PLTS atap dapat dimanfaatkan oleh PT. ON.

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The sustainable energy transition is one of the priority issues in Indonesia's G20 Presidency. As an effort to accelerate the transition to sustainable energy, the Indonesian government is targeting an energy mix from new renewable energy of 23% by 2025, which is dominated by solar power plants. Besides that, implementations of rooftop solar power plant are also reinforced in the economic values through the stipulation of Minister of Energy and Mineral Resources Regulation No. 26 of 2021. In this thesis, a study regarding the application of rooftop solar power plant at PT. ON Production Building II was conducted to find out about the potential for energy production, the potential for saving energy from the grid, the potential for exporting energy to the grid, and the optimal system capacity. The study in this thesis was performed using simulations based on PVSyst software through a trial-and-error method. The results of the study show that the design of the rooftop solar power plant at PT. ON Production Building II can produce energy of 266955 kWh per year. That value is equivalent to 115% of the amount energy consumed yearly by PT. ON. Based on the excess yearly energy production of 15%, the obtained optimal system capacity for the rooftop solar power plant in PT. ON Production Building II is 171 kWp. Through this optimal system capacity, the entire amount of energy produced by the rooftop solar power plant can be fully utilized by PT. ON."

"This book comprises the proceedings of the International Conference on Green Buildings and Sustainable Engineering (GBSE 2018), which focused on the theme “Transforming our Built Environment through Innovation and Integration towards a Smart and Sustainable Future”. The papers included address all aspects of green buildings and sustainability practices in civil engineering, and offer a valuable reference resource for researchers, practitioners, and policy makers."

"Prepare yourselves for the coming Cyber Revolution! Over time, humankind has transformed from hunter-gatherer to farmer, from farmer to industrial worker, and from industrial worker to service provider. Now, we are on the cusp of a fourth transformative wave, spurred by climate change, exponential population growth, and our ever-increasing reliance on technology.This Copernicus book follows the stream of changes we will likely experience over the next few decades. These will involve the design and planning of smart cities and vital new mega-cities, as well as the use of sophisticated artificial intelligence and knowledge systems in our professional and everyday lives. The book shows how the nature of work, economics, taxation, social intercourse, and a slew of other global human endeavors will almost certainly undergo fundamental shifts during this time."

"The fourth edition of this class-tested, multi-disciplinary introduction to solid state engineering adds dozens of revised and updated sections and problems, as well as three new chapters on solar energy harvesting, thermal and photothermal energy harvesting, and photo-thermovoltaics. Combining concepts from physics, chemistry, electrical engineering, materials science, and mechanical engineering, Professor Razeghi describes electron-electron and electron-phonon interactions, the Kane effective mass method, the carbon atom, thermal properties of crystals, the harmonic oscillator, the hydrogen atom, the quantum mechanical description of angular momentum, and the origin of spin in a chapter devoted to quantum mechanics. This textbook features an improved transport theory description that goes beyond Drude theory, discussing the Boltzmann approach. Introducing students to the rigorous quantum mechanical way of thinking about and formulating transport processes, this fourth edition presents the basic physics concepts and thorough treatment of semiconductor characterization technology, designed for solid state engineers."

"Gas alam dan batu bara merupakan sumber daya yang terbatas, sehingga transisi ke energi terbarukan sangat penting untuk masa depan. Hidrogen, alternatif yang bersih dan berlimpah, menawarkan potensi yang signifikan, tetapi metode yang efektif untuk penyimpanan dan pengangkutannya masih menjadi tantangan. Proyek Me2H2 mengatasi masalah ini dengan menggunakan proses uap-besi, sebuah metode yang memungkinkan penyimpanan dan pengangkutan hidrogen melalui oksidasi dan reduksi siklik besi. Tesis ini berfokus pada aspek oksidasi dari proses steam-iron, menyelidiki bagaimana waktu dan suhu mempengaruhi oksidasi besi. Eksperimen melibatkan pemanasan serbuk besi pada suhu 600°C hingga 800°C selama 40 hingga 360 menit. Hasil penelitian menunjukkan bahwa suhu 725°C menghasilkan peningkatan massa tertinggi karena tingkat oksidasi yang optimal, sementara suhu yang sangat tinggi, seperti 800°C, menyebabkan oksidasi permukaan yang cepat sehingga mencegah penetrasi yang seragam. Penelitian ini juga mengidentifikasi pembentukan wüstite, magnetite, dan hematite sebagai oksida besi utama selama proses tersebut. Untuk menganalisis oksida-oksida ini, alat canggih seperti Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX), dan Electron Backscatter Diffraction (EBSD) digunakan untuk memeriksa struktur mikro dan komposisinya. Temuan ini berkontribusi pada optimalisasi proses steam-iron, mendukung kemajuan dalam teknologi penyimpanan hidrogen dan mempromosikan solusi energi yang berkelanjutan dan ramah lingkungan.

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Natural gas and coal are finite resources, making the transition to renewable energy crucial for the future. Hydrogen, a clean and abundant alternative, offers significant potential, but effective methods for its storage and transportation remain a challenge. The Me2H2 project addresses this issue using the steam-iron process, a method that enables hydrogen storage and transport through the cyclic oxidation and reduction of iron. This thesis focuses on the oxidation aspect of the steam-iron process, investigating how time and temperature influence iron oxidation. Experiments involved heating iron powder at temperatures from 600°C to 800°C for 40 to 360 minutes. Results showed that 725°C yielded the highest mass increase due to optimal oxidation rates, while extremely high temperatures, such as 800°C, caused rapid surface oxidation, preventing uniform penetration. The study also identified the formation of wüstite, magnetite, and hematite as key iron oxides during the process. To analyze these oxides, advanced tools like Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX), and Electron Backscatter Diffraction (EBSD) were used to examine their microstructure and composition. The findings contribute to the optimization of the steam-iron process, supporting advancements in hydrogen storage technologies and promoting sustainable, eco-friendly energy solutions."