Energias Renováveis

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    Do The Math
    (PF Pictures, 2013-09-22) Kelly NyksJared; P. Scott
    The fossil fuel industry is killing us. They have five times the amount of coal, gas and oil that is safe to burn - and they are planning on burning it all. Left to their own devices, they'll push us past the brink of cataclysmic disaster - life as we know it will be irrevocably altered forever. Unless we rise up and fight back. DO THE MATH chronicles "America's leading environmentalist" Bill McKibben in a David-vs-Goliath battle to fight the fossil fuel industry and change the terrifying math of the climate crisis. Bill McKibben is going after Big Oil, Big Coal, and Big Gas directly - energizing a movement like the ones that overturned the great immoral institutions of the past century - such as Apartheid in South Africa. Putting his body on the line to stop the Keystone XL Pipeline and leading universities and institutions to divest in the corporations destroying our livelihoods, McKibben is uniting the growing global majority that view the climate crisis as the most important moral issue of the day. The film also features a veritable who's who of the climate movement including Dr. James Hansen (Frmr. Director, NASA's Goddard Institute for Space Studies), Naomi Klein (Author, The Shock Doctrine), Van Jones (CNN Correspondent & Author, The Green Collar Economy) Lester Brown (President, Earth Policy Institute), Michael Brune (Executive Director, Sierra Club), Bobby Kennedy Jr. (President, Waterkeeper Alliance) Majora Carter (Founder, Sustainable South Bronx), Phil Radford (Executive Director, Greenpeace), James Gustave Speth (Co-Founder of NRDC), among others.
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    Solar energy as natural resource utilization in urban areas: Solar energy efficiency literature review
    (IOP Publishing, 2021) Ummah, H F ; Setiati, R ; Dadi, Y B V ; Ariq, M N ; Malinda, M T
    Solar power plant is a power generator that utilizes solar cells to transform solar radiation into electrical energy. Solar cells are a direct energy technology. Electrical energy can be produced without the assistance of moving fluids such as vapour or gas. If it is compared with wind, water and biomasses powers, solar cells utilization tend to be much easier and simpler. The aim of this research is to evaluate urban areas potentials to utilize solar cells as solar power plant. The energy of the sun as a stable electricity source would never be damaged and environmental friendly. A solar power plant system is divided into several sections. Solar cells will transform solar energy into electricity. The electricity produced by solar panels will be stored in an accumulator through a charger controller. This charger controller will act as voltage and current regulator in the accumulator. Rooftop solar power plant utilization has improved as much as 170%. At this moment, there are numerous buildings and housings in urban areas that have already installed rooftop solar panels as electricity generator. Jakarta and Surabaya are two major cities that have already implement rooftop solar power plant on top of office buildings, universities, and housings. Rooftop solar power plant is an environmental friendly and a potential electricity generator to be implemented.
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    A numerical study of Hydro-Hydraulic energy on Undular Tidal Bore phenomenon
    (IOP Publishing, 2021-02) Putra, Y S ; Noviani, E ; Nurhasanah ; Nurhanisa, M ; Azwar, A
    A preliminary study of hydro-hydraulic energy on undular bores may support the invention of various kinds of technology related to renewable energy sourced from the potential of natural resources of Indonesia. Energy could be generated from one type of hydraulic jump that occurs in the river channel, namely undular tidal bore. The tidal bore phenomenon also exists in Indonesia, which occurs in the Kampar River, Riau, known as Bono. A numerical study of energy on wave-like tidal bore has been done for one type of bores, namely undular bores. The simulation of undular bores has been generated using the Computational Fluid Dynamics (CFD) approach assisted by the open-source CFD software, OpenFOAM which applied a turbulent model, namely one-equation Large Eddy Simulation (LES). The undular bores simulation in this study has been validated using experimental and numerical data from selected scientific references. Six simulations of undular bores have been performed based on six different values of Froude number, Fr = 1.04, 1.13, 1.20, 1.27, 1.34, and 1.41. Furthermore, the free surface of undular bores simulation was analyzed by emphasizing on the depth of upstream and downstream flows (d0 and d2 respectively). The rate of change of flow depth ( ), energy dissipation ( ), the rate of energy dissipation ( ), and hydraulic power dissipated of undular bores (PUB ) will increase as a function of the Froude number.
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    Rural renewable energy development: lessons learned from community-based renewable energy business model in East Sumba, Indonesia
    ( 2022) Prilandita, N ; Sagala, S ; Azhari, D ; Habib, A H
    Sumba Island is a remote region with great potential for renewable energy sources, as the Iconic Island of Renewable Energy designated through the Minister of Energy and Mineral Resources Decree No. 3051 K / 30 / MEM / 2015 is targeted to reach 100% of renewable energy usage with 95% of electrification by 2025. To reach this target, the participation of the community as the subject of every renewable energy project is essential. This paper aims to identify the lessons learned to enhance the community’s capacity in implementing the rural community-based renewable energy business model in Indonesia, with the case of the renewable energy business in Luku Wingir and Waimbidi Village - East Sumba. The result indicates that the Rural Community-based Renewable Energy Business Model in the case study need to be developed based on the fundamental strategies of building community capacity: (1) leadership development of the village community in East Sumba, (2) business organizational development in managing the renewable energy, (3) developing a significant role for the community in organizing renewable energy, and (4) adapting collaborative relations among multiple stakeholders in East Sumba.