Implementasi Sistem Kontrol Suhu Pada Miniatur Pendingin Mesin PLTMG Menggunakan Metode PI

Putra, Ardzaniawan Satrya (2026) Implementasi Sistem Kontrol Suhu Pada Miniatur Pendingin Mesin PLTMG Menggunakan Metode PI. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sistem Cooling Water pada mesin gas PLTMG berfungsi menjaga temperatur air pendingin agar tetap berada pada kondisi operasi yang optimal sehingga proses pelepasan panas berlangsung dengan baik dan kinerja mesin tetap stabil. Pada sistem konvensional, pengendalian temperatur masih menggunakan metode kontrol On-Off yang menyebabkan temperatur berfluktuasi di sekitar nilai setpoint sehingga kestabilan sistem kurang optimal. Penelitian ini bertujuan merancang dan mengimplementasikan sistem kontrol suhu menggunakan metode Proportional-Integral (PI) pada prototype miniatur sistem Cooling Water sebagai representasi sistem pendingin mesin PLTMG PT Lamong Energy Indonesia. Identifikasi sistem dilakukan menggunakan MATLAB sehingga diperoleh model transfer function dengan tingkat kesesuaian (best fit) sebesar 97,13%. Parameter kontrol PI diperoleh melalui proses fine tuning dengan nilai Kp = 11 dan Ki = 0,150. Pengujian dilakukan pada setpoint 40°C dan dievaluasi berdasarkan parameter rise time, overshoot, settling time, steady-state, dan steady-state error. Hasil pengujian metode kontrol On-Off menghasilkan rise time sebesar 188 detik, overshoot sebesar 7,80%, tidak mencapai settling time, temperatur steady-state sebesar 39,82°C, dan steady-state error sebesar 0,45%. Sementara itu, implementasi kontrol PI yang diuji sebanyak tiga kali menghasilkan rata-rata rise time sebesar 456,67 detik, overshoot sebesar 1,67%, settling time sebesar 500 detik, temperatur steady-state sebesar 40,11°C, dan steady-state error sebesar 0,26%. Hasil tersebut menunjukkan bahwa metode kontrol PI mampu mengurangi overshoot, mencapai kondisi tunak, serta mempertahankan temperatur lebih dekat dengan nilai setpoint dibandingkan metode kontrol On-Off. Dengan demikian, metode kontrol PI menggunakan parameter Kp = 11 dan Ki = 0,150 terbukti memberikan performa pengendalian suhu yang lebih stabil, akurat, dan konsisten pada prototype sistem Cooling Water miniatur mesin PLTMG.
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The Cooling Water system in a gas engine power plant (PLTMG) is responsible for maintaining the cooling water temperature within its optimal operating range to ensure effective heat dissipation and stable engine performance. In this study, the On-Off control method was employed as a conventional control approach to evaluate the performance improvement achieved by implementing a Proportional-Integral (PI) controller. This research aims to design and implement a temperature control system using the PI method on a Cooling Water system prototype representing the cooling system of a PLTMG gas engine at PT Lamong Energy Indonesia. System identification was carried out using MATLAB, resulting in a transfer function model with a best-fit accuracy of 97.13%. The PI controller parameters were obtained through a fine-tuning process with values of Kp = 11 and Ki = 0.150. Performance evaluation was conducted at a 40°C setpoint using the parameters of rise time, overshoot, settling time, steady-state temperature, and steady-state error. Experimental results using the On-Off control method produced a rise time of 188 seconds, an overshoot of 7.80%, no settling time, a steady-state temperature of 39.82°C, and a steady-state error of 0.45%. Meanwhile, the PI controller was tested three times, yielding an average rise time of 456.67 seconds, an overshoot of 1.67%, a settling time of 500 seconds, a steady-state temperature of 40.11°C, and a steady-state error of 0.26%. These results demonstrate that the PI controller significantly reduces overshoot, achieves a stable steady-state condition, and maintains the cooling water temperature closer to the desired setpoint compared to the conventional On-Off control method. Therefore, the PI controller with Kp = 11 and Ki = 0.150 provides a more stable, accurate, and consistent temperature control performance for the PLTMG Cooling Water system prototype.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	PI, Cooling water, Kipas Pendingin, PLTMG PI, Cooling water, CoolingFan, PLTMG
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control. T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TJ Mechanical engineering and machinery > TJ223 PID controllers
Divisions:	Faculty of Vocational > 36304-Automation Electronic Engineering
Depositing User:	Ardzaniawan Satrya Putra
Date Deposited:	11 Aug 2026 06:30
Last Modified:	11 Aug 2026 06:30
URI:	http://repository.its.ac.id/id/eprint/144311

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