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"Alternative energy, nowadays, becomes more necessary than fossil fuels which might be destructing and polluting the earth’s environment. Wind can be one of the most cheap, secure, environment friendly and reliable energy supplies. Building Integrated Wind Turbine (BIWT) is becoming increasingly common as a green building icon and new method of assessing optimal building energy. However, to employ BIWT, it is important to design the building shape and swept area carefully to increase wind velocity. Some of numerous design forms of BIWT will be explained in this paper using CFD (Computational Fluid Dynamics) analysis to find the most effective BIWT design in urban area. This paper will focus on the maximum wind velocity which passes the swept area to get maximum wind power. The result shows that, building energy can be optimized through aerodynamic building design to get the maximum wind power for building energy consumption."

"Dengan semakin sadarnya manusia terhadap efek penggunaan bahan bakar fosil pada proses generasi energi, industrialisasi, dan transportasi terhadap lingkungan pada khususnya pemanasan global dan perubahan cuaca, pemerintah dan instansi non pemerintah dunia semakin menggalakkan penggunaan sumber energi terbarukan yang ramah lingkungan untuk berusaha menekan dan mengurangi emisi karbon dengan harapan untuk memperlambat perubahan cuaca dan pemanasan global. Salah satu sumber energi terbarukan ramah lingkungan yang sedang digalakkan adalah pemberdayaan angin sebagai sumber energi dengan memanfaatkan turbin angin untuk mengkonversi gaya angin menjadi energi listrik. Negara indonesia sendiri memiliki beberapa kabupaten dan provinsi yang memiliki potensi pengembangan sumber energi terbarukan yang memanfaatkan energi angin dengan kecepatan angin pada ketinggian 50 m sebesar 6 – 8 m/s. Pada sistem konversi energi turbin angin, terdapat berbagai struktur pendukung yang dibutuhkan yaitu salah satunya pondasi. Penelitian ini dilakukan untuk melakukan simulasi gaya aerodinamis turbin angin yang ditempatkan di kabupaten yogyakarta dan melihat efeknya terhadap pondasi monopile. Berdasarkan permodelan didapat bahwa metode permodelan monopile 3 dimensi menghasilkan model yang lebih masuk akal dengan deformasi aksial sebesar 6 mm dan deformasi lateral berdasarkan metode analisis manua sebesar 15 mm

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With increasing awareness of the effects of fossil fuel usage in energy generation, industrial processes, and transportation on the environment, particularly global warming and climate change, governments and non-governmental organizations worldwide are promoting the use of renewable energy sources that are environmentally friendly to mitigate and reduce carbon emissions. This is in the hope of slowing down climate change and global warming. One of the renewable energy sources being promoted is wind power, utilizing wind turbines to convert wind force into electrical energy. Indonesia itself has several districts and provinces with the potential for developing renewable energy sources harnessing wind energy, with wind speeds at a height of 50 meters ranging from 6 to 8 meters per second. In the energy conversion system of wind turbines, various supporting structures are required, one of which is the foundation. This research aims to simulate the aerodynamic forces on wind turbines located in Yogyakarta district and observe their effects on monopile foundations. Based on the modeling, it was found that the three-dimensional monopile modeling method produces a more reasonable model with axial deformation of 6 mm and lateral deformation based on manual analysis of 15 mm."

"Topics in experimental dynamics substructuring and wind turbine dynamics, volume 2, proceedings of the 30th IMAC, a Conference and Exposition on Structural Dynamics, 2012, the second volume of six from the Conference, brings together 31 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of structural dynamics."

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Pertanian 4.0 yang merupakan masa depan teknologi pertanian melambangkan revolusi dalam sektor pertanian melalui integrasi teknologi canggih seperti Internet of Things (IoT), pertanian presisi, dan masih banyak lagi. Salah satu metode untuk melibatkan implementasi IoT generasi mendatang dalam pengisian energi proaktif dan jaringan nirkabel generasi mendatang adalah pemanenan energi Frekuensi Radio (RF). Ini adalah proses menyerap energi dari RF dan mengubahnya menjadi listrik. Sebagai alat pemanen energi, digunakan rectenna (penyearah + antena), yang terdiri dari antena penerima, matching network, penyearah RF ke DC, elemen penyimpanan, dan beban. Penelitian ini mengusulkan rangkaian penyearah RF ke DC dengan frekuensi operasi 920 MHz. Berdasarkan hasil simulasi, rangkaian yang dirancang memiliki tegangan keluaran sebesar 3.3 V, arus keluaran sebesar 2.2 mA, dan tingkat efisiensi sebesar 73.31%. Rangkaian ini dibuat dalam sebuah PCB dengan dimensi 4 x 2.4 cm

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Agriculture 4.0, which is the future of agricultural technology, symbolizes a revolution in farming through the integration of advanced technologies such as the Internet of Things (IoT), precision agriculture, and many more. One method for involving the next-generation IoT implementation in proactive energy replenishment and next-generation wireless network is Radio Frequency (RF) energy harvesting. It is the process of absorbing energy from the RF and turns into electricity. As a tool for energy harvesting, a rectenna (rectifier + antenna) is used, which consists of a receiver antenna, matching network, RF-to-DC Rectifier, storage element, and a load. This research proposes an RF-to-DC Rectifier circuit with an operating frequency of 920 MHz. According to simulation results, the designed circuit has an output voltage of 3.3 V, an output current of 2.2 mA, and an efficiency level of 73.31%. This circuit was constructed in a PCB with a 4 x 2.4 cm dimension.

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"Promoting the development of renewable energy is one of the important strategies for China to achieve energy conservation, emission reduction and energy transition. Although China has successfully developed a large-scale wind power industry, the serious problem of wind energy curtailment has led to the conflicts between decentralization and centralization. Based on this issue, the research questions of this paper are: Under China’s authoritarian regime, why does the Chinese government’s wind power governance mechanism cause the problem of wind energy curtailment to rise and fall periodically? Why does the governance mechanism show an unstable phenomenon of alternating between decentralization and centralization? Based on the authors’ interviews (including face to face interviews and remote interviews) targeting at seven provinces (cities/autonomous areas) in China from July 2014 to June 2022, this research proposes an analytical framework to explain the central and local government’s response strategies and governance cycles, and explores the background behind the local government’s response strategies- the “local routines”action mode. This research finds that when Chinese wind power governance mechanism faces the problem of wind energy curtailment, even if the central government proposes policy indicators and documents, the ultimate goal of local governments’ “local routines” is to maximize their own interests, instead of solving problems effectively. Under the situation that the central and local governments continue to make moves with each other, the problem of wind power curtailment has been characterized by huge fluctuations for a long time, which impacts the effect of energy conservation and emission reduction. This study contributes to a renewed understanding of central-local relations and environmental politics in Chinese authoritarian regimes, as well as to explain the puzzling alternating trajectories in the field of governance."

"Permintaan energi dari sumber daya terbarukan terus mendorong kebutuhan pembangkitlistrik tenaga angin di Indonesia. Tujuan studi adalah memaparkan pemodelan pengambilankeputusan lokasi turbin angin dan mendesain teknologi turbin angin yang baik digunakan diIndonesia. Studi ini, menggunakan metode Multi-Criteria Decision Making sebagai metodepengambilan keputusan yang diintegrasi dengan metode Geographic Information Systemsebagai metode penentuan lokasi dan teknologi yang cocok untuk membangun turbin angin.Selanjutnya hasil akan digunakan sebagai parameter desain awal teknologi turbin angin.Selama proses analisa, faktor berupa multivariat dipertimbangkan. Cakupan wilayah padastudi ini adalah negara Indonesia.Hasil studi berupa peta kecocokan wilayah dengan energi angin. Parameter kecocokandibagi menjadi empat yaitu "sangat cocok", "cocok", "kurang cocok", dan "tidak cocok".Hasil menyimpulkan bahwa 40% area Indonesia masuk ke dalam kategori "cocok" denganenergi angin khususnya di Pulau Sulawesi dan Nusa Tenggara Timur. Sementara itu, 20% areaIndonesia masuk ke dalam kategori "tidak cocok" berdasarkan kondisi geografi setempat,meskipun kecepatan angin yang tinggi, dan rentan terhadap bencana alam. Identifikasi areakecocokan ini akan menjadi pertimbangan awal untuk desain teknologi turbin angin yangoptimal bagi Indonesia.Kerangka pemodelan ini dapat mendorong transisi energi terbarukan tanpa memandangdaerah khusus yang diharapkan dapat berkontribusi sebanyak 8% dari total target pencapaiantransisi energi terbarukan Indonesia 2025.

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Demand for energy from renewable sources continues to drive the need for wind power

plants in Indonesia. The purpose of the study is to describe modeling decision making for wind

turbine locations and to design wind turbine technology that is well used in Indonesia. This

study uses the Multi-Criteria Decision Making method as a decision-making method that is

integrated with the Geographic Information System method as a location determination

method and suitable technology for building wind turbines. Furthermore, the results will be

used as initial design parameters for wind turbine technology. During the analysis process,

multivariate factors are considered. The area covered in this study is Indonesia.

The results of the study are in the form of a suitability map of the area with wind energy.

The match parameter is divided into four, namely "very suitable", "suitable", "less suitable",

and "not suitable". The results conclude that 40% of Indonesia's area falls into the "suitable"

category for wind energy, especially on the islands of Sulawesi and East Nusa Tenggara.

Meanwhile, 20% of Indonesia's area falls into the "unsuitable" category based on local

geographic conditions, despite high wind speeds, and is vulnerable to natural disasters.

Identification of this suitability area will be the initial consideration for the optimal wind

turbine technology design for Indonesia.

This modeling framework can encourage the renewable energy transition regardless of

special regions which are expected to contribute as much as 8% of the total target of achieving

Indonesia's 2025 renewable energy transition."