RESPONS TERMAL KOMPARATIF DAN STABILITAS PENGUAPAN AIR SULING, KERUING OLEORESIN-AQUEOUS BLEND, DAN PENDINGIN RADIATOR KOMERSIAL DI BAWAH PEMANASAN LISTRIK TERKONTROL: Comparative Thermal Response And Evaporation Stability Of Distilled Water, Keruing Oleoresin-Aqueous Blend, And Commercial Radiator Cooling Under Controlled Electric Heating

simon petrus; Merpatih; Mimin  Rihotimawati

doi:10.46964/mjibtm.v19i1.1830

Authors

simon petrus Politeknik Negeri Samarinda
Merpatih Politeknik Negeri Samarinda
Mimin Rihotimawati Politeknik Negeri Samarinda

DOI:

https://doi.org/10.46964/mjibtm.v19i1.1830

Keywords:

Oleoresin Keruing, Cairan Pendingin, Korosi, Radiator Aluminium, Elektrokimia, Potensiodinamik

Abstract

Media pendingin untuk manajemen termal otomotif harus menyeimbangkan penyerapan panas, retensi volume, dan pemulihan termal pasca-pemanasan. Studi ini membandingkan respons termal dan stabilitas penguapan dari tiga cairan: air suling, campuran oleoresin air suling, dan pendingin radiator komersial. Setiap medium disediakan pada volume awal 250 mL dan dipanaskan pada pemanas listrik 600 W. Suhu dipantau menggunakan termokopel sementara perubahan massa dan volume diukur sebelum dan sesudah pemanasan. Dua durasi pemanasan, 300 dan 600 detik, digunakan untuk mengevaluasi suhu maksimum, waktu pemanasan, waktu pendinginan hingga 35 °C, dan persentase penguapan. Pendingin komersial menunjukkan kepadatan tertinggi (1,10 g cm-3) dan penguapan terendah, dengan kehilangan volume masing-masing 8% dan 10% setelah 300 dan 600 detik. Air suling menunjukkan kehilangan penguapan tertinggi, meningkat dari 15% menjadi 20% seiring dengan meningkatnya durasi pemanasan. Campuran oleoresin mengurangi penguapan relatif terhadap air suling, tetapi tidak mengungguli cairan pendingin komersial dalam retensi volume dan menunjukkan pemulihan termal yang relatif lambat. Temuan ini menunjukkan bahwa oleoresin keruing dapat memodifikasi perilaku termal air suling, tetapi optimalisasi lebih lanjut dari stabilitas formulasi, konsentrasi, dan pengujian loop aliran diperlukan sebelum campuran dapat direkomendasikan untuk aplikasi radiator

Author Biography

Merpatih, Politeknik Negeri Samarinda

Di Review

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