Rancang Bangun Sistem Mixing pada Tangki Heater untuk Menjaga Stabilitas Nanofluida dalam Sistem Heat Exchanger

Zahrani, Gistyanti Alvira Terre (2026) Rancang Bangun Sistem Mixing pada Tangki Heater untuk Menjaga Stabilitas Nanofluida dalam Sistem Heat Exchanger. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan merancang dan membangun system mixing pada tangki heater untuk menjaga kestabilan nanofluida dalam sistem heat exchanger. Stabilitas nanofluida sangat memengaruhi efektivitas perpindahan panas karena sedimentasi partikel dapat menyebabkan ketidakhomogenan dan menurunkan kinerja sistem. Nanofluida yang digunakan adalah ZnO@TiO2-1 dan ZnO@TiO2-2 berbasis air. Sistem mixing dirancang menggunakan motor AC dengan variasi dua jenis blade, yaitu paddle blade dan propeller blade. Sistem dikendalikan oleh Arduino Mega 2560 yang terhubung dengan LabVIEW untuk mengatur fungsi On/Off mixing secara otomatis. Eksperimen dilakukan menggunakan tangki akrilik sebagai simulasi tangki utama, dengan menguji pengaruh berbagai parameter terhadap kestabilan nanofluida, yaitu kecepatan putar agitator, ukuran diameter blade, jumlah blade, posisi tinggi blade, dan jenis blade. Evaluasi kestabilan nanofluida dilakukan melalui pengamatan visual terhadap tingkat kekeruhan dan keberadaan endapan partikel, di mana nanofluida dikatakan stabil apabila distribusi partikel tampak merata dan tidak terjadi pengendapan. Selanjutnya dilakukan pengujian efektivitas perpindahan panas pada sistem heat exchanger sebelum dan sesudah penerapan sistem mixing, dengan parameter yang diamati meliputi temperatur inlet, outlet, dan efektifitas dari sistem heat exchanger. Hasil pengujian menunjukkan bahwa penerapan sistem mixing mampu menjaga nanofluida homogen. Pada pengujian heat exchanger, mixing meningkatkan kinerja perpindahan panas, di mana efektivitas (ε) naik hingga ±45–50% dibandingkan kondisi tanpa mixing. Blade propeller pada kecepatan 250–350 rpm memberikan performa terbaik dalam menjaga homogenitas dan meningkatkan efektivitas.
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This study aims to design and build a mixing system in a heater tank to maintain the stability of nanofluids in a heat exchanger system. The stability of nanofluids greatly affects heat transfer efficiency because particle sedimentation can cause inhomogeneity and reduce system performance. The nanofluids used are water-based ZnO and ZnO@TiO₂. The mixing system is designed using an AC motor that drives an agitator with two types of blades, namely paddle blades and propeller blades. The system is controlled by an Arduino Mega 2560 connected to LabVIEW via serial communication using a VISA module to automatically regulate the mixing On/Off function. Experiments were conducted using an acrylic tank as a simulation of the main tank, testing the influence of various parameters on nanofluid stability, including agitator rotation speed, blade diameter, number of blades, blade height position, blade type, and mixing time. The results of the variable influence tests were used to determine the final design of the mixing system applied to the main system. Subsequently, the effectiveness of reynoansfer in the heat exchanger system was tested before and after the application of the mixing system, with observed parameters including inlet and outlet temperatures, flow rate, and pressure. The test results showed that the application of the mixing system could improve the homogeneity of the nanofluid and maintain effectiveness of heat transfer.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Nanofluida, Sistem Mixing, Efektivitas Perpindahan Panas ============================================================ Nanofluids, Mixing System, Heat Transfer Effectiveness
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Vocational > Instrumentation Engineering
Depositing User:	Gistyanti Alvira Terre Zahrani
Date Deposited:	03 Aug 2026 07:02
Last Modified:	03 Aug 2026 07:02
URI:	http://repository.its.ac.id/id/eprint/142314

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