Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Journal La Multiapp Sinergi Polmed : Jurnal Ilmiah Teknik Mesin
Abdul Razak
Program Studi Teknik Konversi Energi, Jurusan Teknik Mesin, Politeknik Negeri Medan, Jl. Almamater No.1, Padang Bulan, Kec. Medan Baru, Medan, Sumatera Utara 20155, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
PENGARUH LAJU ALIRAN FLUIDA PANAS DAN DINGIN TERHADAP EFEKTIVITAS PENUKAR KALOR TIPE SHELL AND TUBE Abdul Razak; Al Faruk; Rahmawaty; Husin Ibrahim; Muhammad Anhar Pulungan
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 2 (2026): Edisi Juni
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v7i2.3292

Abstract

Alat penukar kalor (heat exchanger) merupakan alat yang digunakan dalam proses perpindahan panas, berfungsi untuk mengubah temperatur dan fasa suatu jenis fluida dengan memanfaatkan perpindahan panas dari fluida bersuhu tinggi menuju fluida bersuhu rendah. Salah satu jenis heat exchanger yang paling banyak digunakan secara luas adalah tipe shell and tube heat exchanger. Fokus penelitian ini adalah menganalisis pengaruh laju aliran fluida panas dan dingin terhadap efektivitas penukar kalor tipe shell and tube dengan aliran berlawanan. Metode pengumpulan data adalah pengujian langsung terhadap alat, dengan membandingkan pengaruh antara laju aliran fluida panas konstan, laju aliran fluida dingin konstan, dan laju aliran fluida panas dan dingin diatur sama besar terhadap efektivitas penukar kalor tipe shell and tube heat exchanger. Setelah dilakukan pengujian dan analisis, hasil penelitian ini menunjukkan bahwa pengaruh laju aliran fluida panas konstan Qh = 1000 l/h diperoleh nilai efektivitas tertinggi 51,479 %, laju aliran fluida dingin konstan Qc = 900 l/h diperoleh nilai efektivitas tertinggi 51,563 %, dan laju aliran fluida panas dan dingin diatur sama besar diperoleh nilai efektivitas tertinggi 39,459 %. Dari hasil penelitian ini disimpulkan bahwa laju aliran fluida sangat berpengaruh terhadap efektivitas penukar kalor tipe shell and tube heat exchanger. Ketika laju aliran fluida panas dan dingin mendekati atau sama besar maka nilai efektivitas penukar kalor tipe shell and tube dengan aliran berlawanan akan semakin kecil.
Thermal Effectiveness Analysis of Lube Oil Cooler Fan with Capacity of 40.332 Kg/S with Pressure of 5 Bar Angga Bahri Pratama; Abdul Razak; Nasya Ayu Lestari Horoni; Sahat Sahat; Nelson Manurung; Berta Br Ginting; Franklin Taruyun Hudeardo Sinaga; Zumhari Zumhari
Journal La Multiapp Vol. 7 No. 3 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i3.841

Abstract

The Lube Oil Cooler Fan is an essential component in the lubrication system of a gas turbine because it maintains lubricating oil temperature within a safe operating range. This study aims to analyze the thermal performance and effectiveness of the Lube Oil Cooler Fan on Gas Turbine GT 1.1 at PT XYZ. The study employed a descriptive quantitative approach using field observation data and heat transfer calculations. The analysis was conducted through the Log Mean Temperature Difference method and heat exchanger effectiveness approach by considering fluid temperature changes, mass flow rates, thermophysical properties, flow characteristics, convective heat transfer coefficients, overall heat transfer coefficient, heat transfer rate, and thermal effectiveness. The results show that the lubricating oil temperature decreased from 61°C to 49°C, while the cooling air temperature increased from 32°C to 53.5°C. The tube side heat transfer coefficient was 40.71 W/m²°C, the shell side heat transfer coefficient was 308 W/m²°C, and the overall heat transfer coefficient was 30.61 W/m²°C. The calculated heat transfer rate was 992.57 W or approximately 0.993 kW. The lubricating oil was identified as the minimum heat capacity fluid, with a heat capacity rate of 33.13 kW/°C. The thermal effectiveness of the Lube Oil Cooler Fan was 41.4%, indicating that the cooler was able to perform its cooling function, although its performance remained moderate. Routine monitoring, stable airflow control, and periodic cleaning are recommended to improve thermal performance.
Co-Authors Al Faruk Angga Bahri Pratama Berta Br Ginting Franklin Taruyun Hudeardo Sinaga Husin Ibrahim Muhammad Anhar Pulungan Nasya Ayu Lestari Horoni Nelson Manurung Rahmawaty Sahat Sahat Zumhari Zumhari