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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Normative: Jurnal Ilmiah Hukum
Pramana, Raditya
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Humanities Education Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Analisis Variasi Bukaan Sudut Inlet Guide Vane Pada Turbin Gas Centaur 40 Tipe 4702 Saat Uji Performa di PT. Nusantara Turbin dan Propulsi Sembali, Tryas Putranto; Pramana, Raditya; Marpaung, Gabriel M.C.; Simanjuntak, Daniel Manuturi; Ramdani, Wahyu
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i5.58722

Abstract

Turbin gas Centaur 40 tipe 4702 merupakan salah satu mesin yang digunakan dalam industri energi dan membutuhkan evaluasi performa pasca-overhaul untuk memastikan kelayakan operasional. Penelitian ini bertujuan menganalisis pengaruh variasi bukaan sudut Inlet Guide Vane (IGV) terhadap performa turbin gas, meliputi Shaft Horse Power (SHP), efisiensi termal, dan konsumsi bahan bakar. Metode yang digunakan adalah pendekatan kuantitatif melalui perhitungan termodinamika dan verifikasi data uji aktual di fasilitas test cell PT. Nusantara Turbin dan Propulsi, dengan rentang sudut IGV 5°–8°. Hasil penelitian menunjukkan bahwa peningkatan sudut IGV menghasilkan peningkatan SHP dari 2.848,36 kW menjadi 3.211,60 kW, efisiensi termal meningkat dari 31,14% menjadi 32,52%, dan konsumsi bahan bakar naik dari 4,18 Gpm menjadi 5,40 Gpm, masih dalam batas wajar sesuai standar OEM. Sudut optimal diperoleh pada 7°, dengan performa berada dalam batas spesifikasi pabrikan. Temuan ini menunjukkan bahwa variasi bukaan IGV memiliki dampak signifikan terhadap performa mesin pasca-perawatan, serta dapat menjadi dasar penyesuaian teknis untuk menghindari performa rendah. Implikasi praktis dari studi ini mendukung pengembangan strategi optimasi pengujian performa dan pemeliharaan turbin gas di industri.
Analisis Putusan Mahkamah Konstitusi Nomor 62/PUU- XXII/2024 Tentang Penghapusan Presidential Threshold Puspita, Lona; Pramana, Raditya
Normative Jurnal Ilmiah Hukum Vol 13 No 2 (2026): Normativ: jurnal ilmiah hukum
Publisher : Fakultas Hukum Universitas Tamansiswa Padang

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Abstract

The Presidential Threshold is the minimum threshold for the percentage of seats obtained in the House of Representatives (DPR) or the percentage of national valid votes that must be met by political parties to be able to propose presidential and vice-presidential candidates. This provision was first implemented in the 2004 Election and was later regulated in Article 222 of the Election Law Number 7 of 2017. This rule is considered to limit democracy and reduce the constitutional rights of political parties and citizens, thus giving rise to debate regarding its suitability with the principle of popular sovereignty in the 1945 Constitution. The problems studied include 1) How are the judges' considerations in the Constitutional Court decision Number 62/PUU-XXII/2024 concerning the Abolition of the Presidential Threshold. 2) What is the legal impact of the decision on the election system in Indonesia. This study aims to determine the judges' considerations in the Constitutional Court decision Number 62/PUU-XXII/2024 concerning the Abolition of the Presidential Threshold and how the decision impacts the election system in Indonesia. The results of this study indicate that: 1) The Constitutional Court considers the Presidential Threshold to be discriminatory, reduces the openness of political competition, and contradicts the principles of morality, rationality, and constitutional justice. This decision marks an important milestone after similar requests were repeatedly rejected. 2) As a result, all political parties can now nominate presidential and vice-presidential candidates without a threshold, although it has the potential to create many candidate pairs and vote fragmentation. The increase in the number of presidential candidates has the potential to extend the election stages, increase the administrative burden on organizers, and increase the risk of political polarization in society.
Co-Authors Marpaung, Gabriel M.C. Puspita, Lona Sembali, Tryas Putranto Simanjuntak, Daniel Manuturi Wahyu Ramdani