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All Journal Jurnal Mechanical Jurnal Teknik Mesin Indonesia
Indri Yaningsih
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Perpindahan panas secara konveksi pada magnetorheological fluid: Review Zeluyvenca Avista; Ubaidillah Ubaidillah; Zainal Arifin; Indri Yaningsih
Jurnal Teknik Mesin Indonesia Vol 16 No 1 (2021): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v16i1.196

Abstract

Magnetorheological fluid (MRF) merupakan cairan magnet yang mempunyai sifat dari cair menjadi hampir padat dibawah medan magnet eksternal. Bahan pembentuk MRF berupa fluida dasar, partikel padat, dan aditif. Review artikel ini difokuskan pada perpindahan panas konveksi yang terjadi dalam MRF. Kajian mengenai perpindahan panas konduksi pada MRF baik simulasi numerik maupun eksperimental sudah banyak dilakukan sebelumnya namun kajian pada perpindahan panas secara konveksi untuk MRF masih sangat jarang ditemukan. Sehingga pada review artikel ini akan dilakukan peninjauan pada ferrofluid, nano fluid dan elektrorheological fluid. Dengan peninjauan pada kajian konveksi di fluida magnet tersebut, maka pada hal serupa juga dapat diterapkan untuk studi mengenai perpindahan panas secara konveksi pada MRF.
Pengaruh Jenis Humidifier (Spray Humidifier dan Pad Humidifier)Terhadap Produktivitas Unit Desalinasi Berbasis Pompa Kalor Dengan Menggunakan Proses Humidifikasi dan Dehumidifikasi Indri Yaningsih; Tri Istanto
JURNAL MECHANICAL Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v6.i1.201507

Abstract

This research examined the effect of the use of spray humidifier and pad humidifier on the productivity of a desalination unit based heat pump with using humidification and dehumidification process. In spray humidifier there were 5 pieces of sprinklers for spraying sea water. In pad humidifier, sea water was distributed evenly over the top by means of sea water flowing through perforated pipes that have been placed on pad humidifier. Tested the effect of sea water volumetric flow rate, air velocity and sea water temperature which was fed to spray humidifier and pad humidifier on the fresh water production resulted from desalination unit.The research result showed that the production of fresh water increased with the increase in the sea water volumetric flow rate, air velocity, and sea water temperature, this applies to the use of spray humidifier or pad humidifier in the desalination unit.On testing of the effect of the sea water volumetric flow rate, air velocity, and sea water temperature, the performance of spray humidifier and pad humidifier was equal in the production of fresh water, when the ratio of sea water mass flow rate to air mass flow rate of 1.34, 1.3 and 1.3, respectively.Keywords : dehumidification,desalination, humidification, pad humidifier, spray humidifier
Pengaruh Kecepatan Putaran Kompresor Terhadap Produktivitas Unit Desalinasi Berbasis Pompa Kalor Dengan Proses Humidifikasi dan Dehumidifikasi Indri Yaningsih
JURNAL MECHANICAL Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study was conducted to examine the effect of the compressor rotation speed on the productivity of a desalination unit based heat pump with using humidification and dehumidification process. Desalination unit consists of a heat pump system, humidifier and dehumidifier, and seawater heater and air heater (condenser). In this study, the compressor rotation speed was varied at 500 rpm, 700 rpm and 900 rpm, using a variable frequency inverter that mounted on an electric motor driving the compressor. Research parameters were kept constant i.e. the seawater mass flow rate entering the humidifier at 0.086 kg/s, the temperature of seawater entering the humidifier was kept constant at 45oC, the air velocity entering the humidifier constant at 4 m/s, salinity seawater feed at 31,342 ppm, and seawater in the system was recirculated. The results of this study show that the production of freshwater increases with increasing the compressor rotation speed. The average of freshwater production rate of the desalination unit for the compressor rotation speed of 500 rpm, 700 rpm and 900 rpm were 20.33 l/day, 22.20 l/day, and 24.48 l/day, respectively. Keywords : compressor rotation, dehumidification, desalination, heat pump, humidification
Co-Authors Tri Istanto Ubaidillah Ubaidillah Zainal Arifin Zeluyvenca Avista