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All Journal Bina Teknika Infotekmesin International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Penelitian dan Pengabdian Masyarakat Jurnal Multidisiplin Indonesia
Komarudin Komarudin
Universitas Dian Nusantara
Humanities Automotive Engineering Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Veterinary Other

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ANALISIS KENAIKAN PLANT HEAT RATE PLTU SEBELUM PERBAIKAN BERKALA TERHADAP KONDISI TESTING KOMISIONING (Studi Kasus : PLTU XX) Komarudin Komarudin; Andrian Saputro; Erfiana Wahyuningsih
Bina Teknika Vol 16, No 1 (2020): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/bt.v16i1.1740

Abstract

Steam power plant is a power plant which use coal as fuel to heating the water into superheated steam. The standard of efficient or not for a power plant can be seen from the value of plant heat rate. Plant heat rate is amount of energy required to generate one kWh electricity. The smallest of that is the best power plant. In general, the value of plant heat rate has increased than commisioning test after the power plant operated continously. The method used in the calculation of the steam power plant is energy balance method. Energy balance calculation method used by the standard of the American Society of Engineers Mechanichal Performance Test Code (ASME PTC). The value of plant heat rate is influenced by the value of turbine heat rate and boiler efficiency from steam power plant. Turbine heat rate is the required energy turbines obtained from heat transfer process to generate one kWh electricity, while boiler efficiency is an indicator from boiler performance of steam power plant by comparing the outputs and inputs. After calculation of plant heat rate at actual condition, the value of plant heat rate has increased than commisioning. The increrase of plant heat rate value is due to more losses which result degradation performance on the main components of the unis, such as : turbine, boiler, air heater and condenser. Therefore necessary corrective maintenance when first year inspection, so that the steam power plant can be re-optimal performance as at commisioning test.
ANALISIS PERENCANAAN PENGADAAN KOMPONEN REM PESAWAT B737-800 NG BERDASARKAN SATUAN CYCLE DAN FLIGHT HOURS DI PT ABC Komarudin Komarudin; Djoko Suprijatmono Suprijatmono
Bina Teknika Vol 16, No 1 (2020): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/bt.v16i1.1730

Abstract

As one of the MRO (Maintenance, Repair, Overhaul) company PT ABC had the significant problems in the last 3 years, including concerns regarding the difficulty of determining the amount of material availability and timing of procurement the material appropriate to support maintenance activities. In this case the components studied are two type brake of aircraft the first one is brake assembly and the second one is brake Goodrich which installed on B737-800 aircraft NG. Based on historical data, in last 3 years PT ABC have a number of component shortage that continues to grow, in last year PT ABC had 12 unit shortage component for brake assembly and 13 unit shortage component for brake goodrich. It is gave the negative impact for company and also customer PT ABC. To overcome these problems need to be analyzed how to determine the accuracy the number of brake requests that will removal in future periods which resulting the accuracy of the flight time (dispatch reliability/delay time).The proccess in this reserach first determine the life time of brake, determine the quantity of removal brake, schedule of removal brake, account the forecast of requirement brake in next years and determine the planning of material requirement for maintenance proccess. The forecasting using single exponential smoothing methode to determine forecasting result of brake requirement in 2017. This methode consider the smallest standar error estimate of forecasting demand to get the exact result. Morever MRP (material requirement planning) methode used to determine the procurement components planning (Petition Requirement Planning) with forecasting data from previous year's demand. Based on studies result showed that the quantity of brake assembly and brake Goodrich types that should be available for the removal of as many as 13 units per each type of brake for a period in 2017, while the limit (age component) of brake assembly 38 days and 41 days for brake Goodrich and the estimation schedule of brake removal is the last date installation brake plus the actual age of brake that has determined the schedule of brake assembly in 21st of the months 12 and the 2nd of the month 11 for brake Goodrich and result are showed that MRP decrease the shortage of brake assembly 1 unit and decrease the shortage of brake goodrich 2 unit.
Comparative Analysis of Cooling Load Calculations: CLTD Method vs. Carrier HAP 5.01 Software for Hotel HVAC Design Madarif Prawibowo; Komarudin Komarudin
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 6 No. 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.23781

Abstract

This study examines the cooling load requirements of a hotel building by comparing two methodologies: the traditional Cooling Load Temperature Difference (CLTD) method and the Carrier Hourly Analysis Program (HAP) 5.01 software. The primary objective is to validate the accuracy and reliability of these methods in calculating cooling loads across different room types, from standard rooms to larger, more complex suites. The results show that the CLTD method consistently yields higher cooling load estimates, with discrepancies ranging from 3% to 14% compared to HAP 5.01 calculations. These differences are most significant in larger rooms, such as suites and owner’s suites, which have more extensive glass areas, higher occupancy, and more heat-generating equipment. The findings indicate that while the CLTD method is valuable for quick, preliminary estimates, the HAP 5.01 software provides a more precise and comprehensive analysis, taking into account hourly variations, equipment schedules, and other factors that impact cooling loads. This research highlights the need for careful selection of the appropriate calculation method to ensure the efficient design of HVAC systems, maximizing energy efficiency, and maintaining occupant comfort. The study concludes that for projects requiring high accuracy, particularly in complex or large spaces, dynamic simulation tools like HAP 5.01 are preferable. Detailed cooling load results and comparisons are provided in the supplementary documentation, offering further insights into the analysis and its implications for HVAC design.
Pelatihan Dasar Teknik Pengelasan SMAW Bagi Santri Pondok Pesantren Quantum Idea Komarudin Komarudin; Marysca Shyntia Dewi; Amin Tahmid
Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 3 (2026): August 2026
Publisher : Yayasan Pondok Pesantren Sunan Bonang Tuban

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61231/h9z2dj86

Abstract

This community service program aimed to improve vocational competence and occupational safety awareness among students of Quantum Idea Islamic Boarding School, Bekasi, through basic Shielded Metal Arc Welding (SMAW) training. The program used a participatory practice-based method consisting of needs observation, activity socialization, theoretical instruction, guided welding practice, mentoring, and evaluation. The training materials covered basic SMAW concepts, welding equipment, electrodes, current setting, personal protective equipment, and basic occupational health and safety procedures. The results showed that the participants understood the basic stages of SMAW welding, recognized welding hazards, applied personal protective equipment more consistently, and performed basic welding practice in 1F and 2F positions under instructor supervision. The mentoring process also encouraged students to view welding skills as a practical competence for facility maintenance and small-scale entrepreneurship in the pesantren environment. 
Analisis Mekanisme Kegagalan Guide Vane dan Bottom Ring Akibat Erosi Sedimen pada Turbin Hidro Moh. Ali Sidik; Komarudin Komarudin
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Sediment erosion is one of the primary causes of damage to the guide vane and bottom ring components of hydro turbines, resulting in reduced operational reliability and increased maintenance costs. Previous studies have mainly focused on coating materials, numerical simulations, or microstructural characterization separately, while the failure mechanism based on actual field damage has not been comprehensively explained. This study aims to investigate the failure mechanism of guide vane and bottom ring components subjected to sediment erosion using a forensic engineering approach. The investigation involved visual inspection, in-situ hardness testing, Micro Vickers hardness testing, and microstructural analysis using Scanning Electron Microscopy (SEM). The results revealed that the failure process initiated with the formation of microcracks in the protective coating, followed by coating adhesion degradation and coating spalling. Consequently, the exposed substrate experienced direct impacts from sediment particles, leading to crack propagation and progressive material loss. These findings provide a comprehensive understanding of the sediment erosion failure mechanism and can serve as a reference for improving inspection strategies, maintenance practices, and the durability of protective coatings in hydro turbines
Evaluasi Kinerja Mesin Diesel 2200cc Berbahan Bakar Solar B30 dengan Penambahan Minyak Sereh Mujahidin Mujahidin; Komarudin Komarudin
Jurnal Multidisiplin Indonesia Vol. 5 No. 9 (2026): Jurnal Multidisiplin Indonesia
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jmi.v5i9.2932

Abstract

Peningkatan penggunaan biodiesel B30 sebagai bahan bakar alternatif pada mesin diesel memerlukan upaya untuk meningkatkan kualitas pembakaran agar performa mesin tetap optimal dan emisi gas buang dapat ditekan. Salah satu upaya yang dapat dilakukan adalah dengan menambahkan bioaditif berupa minyak sereh yang mengandung senyawa oksigenat sehingga berpotensi meningkatkan efisiensi proses pembakaran. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan minyak sereh pada bahan bakar Solar B30 terhadap performa mesin diesel berkapasitas 2200cc yang meliputi torsi, daya, dan emisi gas buang, serta menentukan komposisi campuran yang memberikan performa terbaik. Penelitian menggunakan metode eksperimen dengan variasi campuran minyak sereh sebesar 2%, 4%, 6%, dan 8% pada bahan bakar Solar B30. Pengujian performa mesin dilakukan menggunakan dynotest, sedangkan pengujian emisi dilakukan menggunakan alat uji emisi gas buang. Data hasil pengujian dianalisis secara deskriptif melalui perbandingan nilai torsi, daya, dan emisi pada setiap variasi campuran. Hasil penelitian menunjukkan bahwa penambahan minyak sereh memberikan pengaruh terhadap performa mesin diesel. Campuran minyak sereh sebesar 2% menghasilkan performa terbaik dengan torsi maksimum sebesar 333,1Nm pada putaran 2500rpm dan daya maksimum sekitar 151BHP pada putaran 3500rpm. Campuran 4% juga menunjukkan peningkatan performa, sedangkan campuran 6% dan 8% mengalami penurunan akibat proses pembakaran yang kurang optimal karena konsentrasi aditif yang terlalu tinggi. Selain meningkatkan performa mesin, penambahan minyak sereh juga memengaruhi karakteristik emisi gas buang sehingga berpotensi menghasilkan pembakaran yang lebih bersih dibandingkan penggunaan Solar B30 tanpa aditif. Oleh karena itu, komposisi 2% direkomendasikan sebagai campuran optimum untuk meningkatkan performa mesin diesel dan mendukung bahan bakar yang lebih ramah lingkungan.
Co-Authors Amin Tahmid Andrian Saputro Djoko Suprijatmono Suprijatmono Madarif Prawibowo Marysca Shyntia Dewi Moh. Ali Sidik Mujahidin Mujahidin Wahyuningsih, Erfiana