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Sangaji Hasmi Maharani Ipa
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PENINGKATAN LUAS PERMUKAAN KONVERTER RADIASI MATAHARI UNTUK MENINGKATKAN TEMPERATUR DAN DAYA LISTRIK YANG DIHASILKAN OLEH SISTEM GENERATOR TERMOLISTRIK Selestina Yulita Merit Bame; Ishak Semuel Erari; Abdul Muis Muslimin; Sangaji Hasmi Maharani Ipa
Jurnal Natural Vol. 18 No. 2 (2022): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v18i2.193

Abstract

The development of the use of solar energy as a new renewable energy is being encouraged in various forms of its use, and one of them is the conversion of solar energy into electrical energy. The Thermoelectric Generator (TEG) module is a power generation system that utilizes temperature differences to produce electric power. The temperature difference can be obtained from solar radiation the metal will convert into heat energy, which will pass through the TEG and be discharged into the environment. The amount of solar radiation converted into heat depends on the area of ​​the converter. This research aim is to increase the surface area of ​​the solar converter to increase the temperature used in the TEG system to generate electric power. The areas used for capturing solar radiation are 0.06 m2, 0.12 m2 and 0.16 m2 which are made of black aluminum plates in a closed system. At the bottom of the aluminum are installed 7 thermoelectric modules connected to a water reservoir as a coolant. The results of the study showed that the highest temperatures that could be achieved were respectively 39.1, 52.5 and 61oC, and the temperature differences that could be achieved were respectively 9.1; 20.0 and 28 oC. A temperature difference of 7.1 oC produces an electric power of 64.2 mW, and a temperature difference of 28 oC produces an electric power of 282.8 mW.
TINGKAT RISIKO GEMPA BUMI DI KABUPATEN NABIRE BERDASARKAN PERHITUNGAN NILAI PERCEPATAN TANAH MAKSIMUM MENGGUNAKAN METODE DONOVAN Ika Widi Astuti; Sangaji Hasmi Maharani Ipa; Indra Birawaputra; Ishak Semuel Erari
Jurnal Natural Vol. 19 No. 2 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i2.239

Abstract

Kota Nabire merupakan salah satu kota di Papua yang mempunyai tingkat resiko tinggi terhadap bencana alam gempa bumi. Pada tahun 2004, Kota Nabire diguncang gempa dengan kekuatan 7,2 SR yang menyebabkan kerusakan pada bangunan. Tingkat resiko gempa suatu daerah dinyatakan dengan intensitas MMI (Modified Mercalli Intensity) yang diklasifikasikan berdasarkan nilai Percepatan Tanah Maksimum (Peak Ground Acceleration, PGA). Di dalam menentukan PGA digunakan Metode Empiris Donovan dengan menggunakan dua parameter yaitu magnitudo dan jarak hiposentrum. Hasil perhitungan PGA dan Klasifikasi MMI di Kota Nabire dinyatakan dalam citra dua dimensi. Hasil penelitian ini menunjukan bahwa nilai PGA tertinggi yang diperoleh dengan menggunakan Metode Empiris Donovan adalah 339 gal dan digolongkan ke dalam kategori resiko sangat besar 1 dengan intensitas MMI IX-X. Nilai risiko gempa bumi dengan menggunakan nilai percepatan tanah maksimum Metode Empiris Donovan lebih kecil daripada nilai risiko gempa bumi Kementerian Pekerjaan Umum Republik Indonesia.
Co-Authors Abdul Muis Muslimin Ika Widi Astuti Indra Birawaputra Ishak Semuel Erari Selestina Yulita Merit Bame