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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Teknofisika Spektra: Jurnal Fisika dan Aplikasinya
Fitrotun Aliyah
Program Magister Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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Potensi Energi Limbah Usaha Mikro Kecil dan Menengah di Kecamatan Ngemplak dan Nogosari Boyolali Jawa Tengah Budiarto, Rachmawan; Aliyah, Fitrotun
Teknofisika Vol 1, No 1 (2012)
Publisher : Jurusan Teknik Fisika, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (19.463 KB)

Abstract

Kecamatan Ngemplak dan Nogosari di Kabupaten Boyolali Jawa Tengah memiliki kepadatan Usaha Mikro Kecil dan Menengah (UMKM) yang cukup tinggi dengan sebaran lokasi yang relatif tidak terlalu luas. Berbagai jenis limbah aktifitas bisnis UMKM di kawasan tersebut dapat dimanfaatkan sebagai sumber energi. Pemanfaatan lebih lanjut limbah tersebut berpotensi mempertinggi pendapatan sekaligus ketahanan energi UMKM. Survey dilakukan terhadap 1227 UMKM di dua kecamatan tersebut untuk mengetahui antara lain jenis dan kuantitas limbah. Analisis kemudian difokuskan pada UMKM yang menghasilkan limbah yang dapat dimanfaatkan sebagai energi terbarukan melalui teknologi sederhana dan banyak dikenal. Dari analisis diketahui bahwa penerapan teknologi biobriket dan biodigester penghasil biogas terhadap limbah 536 UMKM terpilih di dua kecamatan tersebut berpotensi memberikan energi (non-listrik) sekitar 2,59 GWh/bulan. Potensi besar tersebut membuka langkah komprehensif lanjutan pengembangan aplikasi teknologi energi terbarukan dan mekanisme transfer antar produsen dan konsumen energi di kawasan tersebut.
COMBINED METHOD OF BULK MATERIAL SHIELDING EVALUATION FOR 200 MEV HIGH ENERGY NEUTRON SOURCE USING PHITS MODELLING AND PARTIAL DENSITY Aliyah, Fitrotun; Rahman, Azhar Abdul; Md Radzi, Yasmin; Kambali, Imam
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 1 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 1, April 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.081.01

Abstract

Neutron encounters difficulties in shielding protection. Thus, many researchers have performed simulation and experimental research on neutron shielding materials. The characteristic of materials is highly dependent on neutron energy. The evaluation of neutron shielding for various materials, such as iron, concrete, aluminum, and borated polyethylene (BPE), was conducted in this paper through simulation using a Monte Carlo code of PHITS 3.27 and calculation via partial density method. A mono-energetic neutron source with an energy of 200 MeV is emitted perpendicular to the shielding material with a thickness of 105 cm. The parameters measured in this analysis include flux, fast neutron removal cross-section, neutron depth dose, ambient dose H*(10) equivalent, and neutron dose reduction factor (RF). Results show that iron is a good material against high-energy neutron and secondary photon radiation at the energy range with the highest removal cross-section and the lowest RF value (0.39), followed by concrete, BPE, and aluminum. The integrated fluence and effective dose profiles were consistent with previous results in the literature. Benchmarking calculation of neutron dose RF was conducted with other publications and was in good agreement within the value range.
Photovoltaic thermal (PVT) air collector with monofacial and bifacial solar cells: a review Fudholi, Ahmad; Mustapha, Muslizainun; Taslim, Ivan; Aliyah, Fitrotun; Gani Koto, Arthur; Sopian, Kamaruzzaman
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.742 KB) | DOI: 10.11591/ijpeds.v10.i4.pp2021-2028

Abstract

Photovoltaic thermal (PVT) collectors directly convert solar radiation into electrical and thermal energy. A PVT collector combines the functions of a PV panel and a flat plate solar collector. The development of PVT air collectors is a very promising research area. At present, PVT air collectors are used in solar drying and solar air heaters. On the basis of existing literature, most PVT air collectors were built by using monofacial PV modules. The bifacial PV modules had two active surfaces that could capture solar radiation with its front and rear surfaces. Additional sunlight absorption through both surfaces resulted in an enhanced electrical power generation compared with the conventional monofacial PV. Therefore, bifacial PVT was considered to be useful and attractive due to its potential of enhancing overall system performances, including energy and exergy efficiencies. Findings of this review indicated that PVT air collector with bifacial solar cell produced a larger amount of electrical energy, which was approximately 40% higher than a monofacial PVT. The energy and exergy efficiencies of PVT air collector with monofacial solar cells range from 27% to 94% and from 4% to 18%, respectively. For bifacial PVT, the energy and exergy efficiencies of PVT air collector range from 28% to 67% and from 8.2% to 8.4%, respectively.
Heat transfer and efficiency of dual channel PVT air collector: a review Fudholi, Ahmad; Zohri, Muhammad; Taslim, Ivan; Aliyah, Fitrotun; Gani Koto, Arthur
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v10.i4.pp2037-2045

Abstract

Solar energy is free, renewable and environment friendly and has been widely used in electricity generation and thermal energy through photovoltaic thermal (PVT) system. A PVT collector is a combination of a PV panel and a thermal collector in a single unit to simultaneously generate electricity and thermal energy. In this review, mathematical models for dual channel PVT air collectors is presented. This review presents various research and development, as well as heat transfer and thermal modelling of dual channel PVT air collectors. Moreover, various mathematical models that evaluate the performances base on energy and exergy analysis of dual channel PVT air collectors are presented. Energy balance is the basic concept in developing the mathematical models. Generally, steady-state one-dimensional linear first-order differential equations were reported for solution of mathematical model. Energy and exergy efficiencies of dual channel PVT air collectors were 22.5%–67% and 3.9%-58%, respectively.
Co-Authors Ahmad Fudholi Azhar Abdul Rahman, Azhar Abdul Imam Kambali Ivan Taslim Koto, Arthur Gani Md Radzi, Yasmin Muhammad Zohri, Muhammad Mustapha, Muslizainun Rachmawan Budiarto Sopian, Kamaruzzaman