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Ignatius Riyadi Mardiyanto
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Efektivitas High Pressure Heater (HPH) 7 PT. Z Raharja Puja Gustika; Ignatius Riyadi Mardiyanto; Indriyani, Indriyani
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7329

Abstract

High Pressure Heater (HPH) merupakan komponen yang berperan penting dalam efisiensi siklus karena HPH adalah alat pemanas awal yang digunakan untuk meningkatkan efisiensi siklus dengan cara memanaskan air umpan sebelum memasuki boiler. Penelitian ini dilakukan untuk menganalisis efektivitas High Pressure Heater PT. Z. Penentuan ini berdasarkan data commissioning tahun 2011 dan data aktual pada bulan Maret s.d Agustus 2024. Berdasarkan hasil dari perhitungan HPH 7 didapatkan efektivitas data commissioning subcooling zone sebesar 76,04%, condensing zone sebesar 87,63% dan desuperheating zone sebesar 95,21%, sedangkan efektivitas data aktual pada subcooling zone sebesar 75,69%, condensing zone sebesar 85,62% dan desuperheating zone sebesar 94,48%. Dari hasil yang didapatkan menunjukkan bahwa HPH 7 masih berada dalam efektivitas yang baik sehingga tidak perlu dilakukan overhaul. Akan tetapi, HPH 7 perlu dilakukan pengontrolan level air karena muncul indikasi level air kondensat naik, tube leak, atau venting tidak cukup dari hasil analisis.
Evaluasi Kinerja Hot Well Pump Sebelum dan Setelah Perbaikan di PLTP PGE Kamojang Unit IV Agustianawati, Shifa; Ignatius Riyadi Mardiyanto; Maridjo, Maridjo
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7330

Abstract

The Hot Well Pump plays a pivotal role in the primary cooling system of Geothermal Power Plants (PLTP). Issues arising with the Hot Well Pump can lead to a reduction in the generated electricity, emphasizing the critical importance of corrective maintenance. Pump performance serves as a crucial parameter in indicating the proper functioning of the pump. This study aims to analyze the impact of corrective maintenance on pump performance. The results demonstrate an increase in fluid flow rate from 3429.841 m³/h to 3746.420 m³/h, a decrease in pump head from 18.335 m to 17.463 m, an increase in hydraulic power from 167.244 kW to 172.992 kW, a decrease in input power from 369.162 kW to 332.531 kW, a decrease in shaft power from 345.167 kW to 319.121 kW, and an increase in efficiency from 48.407% to 54.721%. This performance improvement substantiates the effectiveness of corrective maintenance, including the replacement of riser pipe 1, upper shaft, O-ring, and shaft sleeve, in enhancing overall pump performance.
Analisis Penggunaan Sistem Parabolic Trough Collector pada Bypass High Pressure Heater PLTU 600 MW Farhansyah, Farhansyah; Alvera Apridalianti Melkias; Ignatius Riyadi Mardiyanto
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7429

Abstract

The regenerative process involves heating the feedwater out of the condenser using residual steam or extraction from the steam turbine and then pumping it back into the boiler. To achieve the greenhouse gas emission reduction target set by the Government of the Republic of Indonesia, power plant managers need to consider strategies to reduce these emissions. One strategy that can be taken is to harness solar energy through parabolic trough type solar collectors. In PLTUXYZ, the design of a parabolic trough type solar collector is carried out on bypasses HPH 6 through HPH 8 using system advisory model and gatecycle software. The design results show that the existence of this solar collector has the potential to reduce coal use by 9.33 tons/hour under optimal solar conditions, with coal savings reaching 4,143.3 tons of coal for USD 380,231.30/year.
Co-Authors Agustianawati, Shifa Alvera Apridalianti Melkias Farhansyah, Farhansyah Indriyani Indriyani Maridjo, Maridjo Raharja Puja Gustika