Hasil Pencarian  ::  Simpan CSV :: Kembali

"Saat ini, banyak aplikasi teknologi berbasis sumber energi alam dan ramah lingkungan. Bagaimanapun, kekurangan yang sering ditemukan pada sumber energi alam adalah intensitasnya yang tidak menentu. Hal ini juga berlaku pada tenaga matahari pada panel surya, dimana intensitas cahaya yang masuk tidak selalu sama di setiap waktu. Intensitas cahaya dapat dipengaruhi berbagai faktor seperti cuaca yang mendung. Perubahan intensitas cahaya ini berujung pada perubahan besar tegangan yang dihasilkan panel surya. Dengan buck-boost converter, nilai tegangan keluaran dapat diatur menjadi lebih besar atau lebih kecil, menjadi nilai tegangan yang diinginkan. Nilai tegangan yang dihasilkan diatur oleh pemrograman mikrokontroler, yang mengatur lebar pulsa pada PWM. Laporan skripsi ini membahas perancangan buck-boost converter untuk panel surya, dengan mengambil studi kasus di Gedung Pusat Inovasi LIPI di Cibinong, Bogor. Regulasi tegangan keluaran yang dihasilkan merupakan faktor utama dari analisa keberhasilan perancangan buck-boost converter, dengan persentase efisiensi berkisar dari 90 hingga 99%.

---

Currently, there are plenty of technological applications that utilizes a natural, environmental-friendly source of energy. However, a disadvantage often found in natural energy sources is that the intensity produced is uncertain. This occurance is also found in solar panels, wherein the light intensity that enters is not always equal. Light intensity may be affected by various factors such as ones on gloomy or sunny weathers. This irregularity on light intensity leads to deviation of voltage output produced by the solar panel. With the use of buck-boost converters, the amount of output voltage may be set to higher or lower than the input voltage, enabling us to maintain the desired output voltage. The amount of output voltage produced is controlled by a microcontroller program which regulates pulse widths produced by PWM signals. This final project report discusses about the designing of a buck-boost converter for solar panels, with a case study in Gedung Pusat Inovasi LIPI, Cibinong, Bogor. The regulation of output voltage is the main aim in analizing the success of the design created, with an efficiency of 90 to 99%."

"A House in the Sun describes experiments in solar house heating in American architectural, engineering, political, economic, and corporate contexts from the beginning of World War II until the late 1950s. Solar houses were built across the United States, and also proposed for sites in India, South Africa, and Morocco. These experiments developed parallel to transformations in the discussion of modern architecture, relying on new materials and design ideas for both energy efficiency and claims to cultural relevance. These experiments also developed as part of a wider analysis of the globe as an interconnected geophysical system. Perceived resource limitations in the immediate postwar period led to new understandings of the relationships among energy, technology, and economy. The solar house, both as a charged object in the milieu of suburban expansion, and as a means to raise the standard of living in developing economies, became an important site for social, technological, and design experimentation. A House in the Sun argues that this mid-century solar discourse was one of the first episodes in which resource limitations were seen as an opportunity for design to attain new relevance. Furthermore, discussion of and experimentation in solar technology established both an intellectual framework and a funding structure for the articulation of global environmental concerns in subsequent decades. In presenting evidence of resource tensions at the beginning of the Cold War, the book presents a new perspective on the histories of architecture, technology, and environmentalism, one more fully engaged with geopolitical and geophysical pressures."

"Penerangan Jalan Umum (PJU) merupakan prasarana publik yang dibutuhkan khususnya malam hari. Agar efisien dalam pengoperasian dan pengawasan, maka sistem lampu jalan pintar dirancang dapat menyesuaikan keadaan lingkungan sekitar dan terdapat sistem monitoring. Dalam penelitian ini penulis membuat sistem lampu jalan pintar berbasis mikrokontroler yang dapat menyala secara otomatis pada malam hari, keadaan gelap, dan dapat dikendalikan oleh server. Lampu pada sistem ini hanya menyala dengan terang apabila terdapat gerakan manusia di sekitar lampu jalan untuk menghemat energi. Selain tenaga surya, sistem memiliki sumber cadangan PLN. Sistem ini dapat memilih secara otomatis sumber daya mana yang harus digunakan berdasarkan level tegangan baterai. Dari hasil pengujian, sensor gerak dapat mendeteksi gerakan hingga jangkauan jarak 12 meter pada sudut 90°. Rata-rata kesalahan pada sensor arus sebesar 1,32 ± 2,75 % sedangkan pada sensor tegangan sebesar 4,73 ± 12,61 %. Sistem dapat mengirimkan data melalui komunikasi serial mengenai level tegangan baterai, arus dan tegangan pada lampu, status nyala lampu, waktu, tanggal, sumber daya yang sedang digunakan, serta peringatan apabila terjadi kerusakan pada lampu.

---

Street light is public infrastructure that needed in the evening. To reach efficiency of operation and monitoring, so street light system is designed to adapt with environment condition and monitoring system. This research design smart street light system based on microcontroller that can turn on automatically in the evening, in the dark, and controlled by server. The lamp only reach its maximum brightness if the motion detector sensing object to save energy. Except solar power, this system using back up power which is PLN. This system can choose automatically which resources should be used based on the level of battery voltages. By testing this system obtained motion detector can detect maximum range 12 meters at 90°. Error tolerance of current sensor is 1,32 ± 2,75 % and voltage sensor is 4,73 ± 12,61 %. The system can transmit data through the serial communication about the level of battery voltages, current and the voltage at the lamp, lamp state, time, date, resources are being used, and send a warning if the lamp is broken."

"Algoritma Maximum Power Point Tracker MPPT membuat Sel Surya bekerja pada kondisi optimalnya dengan mencari daya maksimum dari Sel Surya. Algoritma MPPT yang digunakan pada penelitian ini adalah algoritma MPPT pengendali Proportional-Integrator PI , algoritma ini mencari kondisi optimal Sel Surya dengan menggunakan pengendali PI. Hasil simulasi menunjukkan algoritma PI MPPT sudah dapat mengendalikan Sel Surya untuk bekerja pada kondisi optimalnya dengan rangkaian Boost Converter. Hasil pengujian algoritma PI MPPT juga sudah dapat mengendalikan Sel Surya untuk bekerja pada kondisi optimalnya dengan rentang waktu sampling PI MPPT 0.00005 sampai 0.0001 detik dan rentang beban yang digunakan adalah dua sampai empat lampu.

---

Maximum Power Point Tracker MPPT algorithm make the Solar Cell worked at optimal condition by tracking the maximum power of Solar Cell. MPPT algorithm that used in this research is MPPT algorithm with Proportional Integrator PI controller, this algorithm tracking the maximum power of Solar Cell by using PI controller.

Result of the simulation shows that PI MPPT algorithm can controlled the Solar Cell to work at optimal condition with Boost Converter circuit. Result of experiment shows that PI MPPT algorithm can controlled too the Solar Cell to work at optimal condition with range time sampling of PI MPPT from 0.00005 until 0.0001 seconds and load range that is used are two until four lamps."