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Nanang Apriandi
Politeknik Negeri Semarang
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Journal : Journal of Mechanical Engineering and Applied Technology

 1 
DESIGN AND PERFORMANCE TEST OF A CABINET TYPE DRYER FOR DRYING BREADFRUIT CHIPS: A CASE STUDY OF THE SUMBER REJEKI PURWOSARI FARMERS GROUP, SEMARANG CITY Apriandi, Nanang; Kristiawan, Timotius Anggit; Herlambang, Yusuf Dewantoro; Supandi, Supandi; Abidin, Zainal; Wibowo, Andryana Dwiandara
Journal of Mechanical Engineering and Applied Technology Vol. 1 No. 3 (2023): Volume 1 Issue 3 Year 2023 (November 2023)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v1i3.5112

Abstract

This study aims to design and build a cabinet-type breadfruit chips dryer powered by liquefied petroleum gas (LPG) and to assess the dryer's characteristics, particularly by observing the temperature and relative humidity (RH) variables in the drying chamber. This characteristic data is critical for forecasting the dryer's ability during drying. The experimental approach was carried out in three stages: design, assembly, and testing without a drying load under two process conditions, charging and discharging. The testing time is 150 minutes, with the charging procedure taking 70 minutes and the discharging process taking 80 minutes. In general, the distribution of temperature and RH on each shelf in the drying chamber is consistent, both during the charging and discharging processes. In the charging-discharging process, the average temperature of the drying room is 45.39 C with a RH of 40.99%, while the plenum room average temperature is 77.02 C.
PEMBUATAN DAN UJI PERFORMA TERMAL ALAT PENGERING SKALA LABORATORIUM DENGAN PENAMBAHAN THERMAL ENERGY STORAGE (TES) BERBASIS PHASE CHANGE MATERIAL (PCM) Apriandi, Nanang; Herlambang, Yusuf Dewantoro; Negara, Komang Metty Trisna; Raharjanti, Rani
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 1 (2024): VOLUME 2 ISSUE 1 YEAR 2024 (MARCH 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i1.5423

Abstract

Pengeringan merupakan salah satu metode pengawetan yang paling banyak digunakan untuk memperpanjang masa simpan produk pertanian, makanan, dan bahan lainnya. Penelitian ini bertujuan untuk merancang dan membangun alat pengering skala laboratorium yang inovatif dengan integrasi thermal energy storage (TES) berbasis phase change material (PCM) menggunakan paraffin wax sebagai media penyimpanan energi. Metode yang digunakan meliputi desain alat, perakitan, dan pengujian performa. Paraffin wax dipilih karena sifatnya yang mampu menyimpan dan melepaskan energi panas secara efisien pada rentang suhu pengeringan yang dibutuhkan. Penelitian ini secara khusus mengevaluasi kinerja termal dari alat pengering untuk mendapatkan karakteristik sistem berupa distribusi temperatur di ruang pengering, distribusi temperatur pada media TES, dan distribusi temperatur udara keluar alat pengering melalui cerobong. Hasil investigasi menunjukkan bahwa penambahan TES berbasis PCM paraffin wax mampu menjaga stabilitas temperatur di ruang pengering. Hal ini nantinya akan berdampak positif pada efisisensi sistem secara keseluruhan.
Mass Ratio Influence on Vortex-Induced Vibration of a Flexible Cylinder using Large Eddy Simulation at Re=1000 An-Nizhami, Avicenna; Apriandi, Nanang; Setiawan, Trio; Kristiawan, Timotius Anggit; Riadini, Elfrida Rizky; Janitra, Atikah Ayu; Yanuar, Padang
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 1 (2024): VOLUME 2 ISSUE 1 YEAR 2024 (MARCH 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i1.5498

Abstract

The study investigates the phenomenon of vortex-induced vibration (VIV) using Large Eddy Simulation (LES) at a Reynolds number of 1000, focusing on transitional flow conditions. LES has proven effective in understanding VIV across Reynolds number regimes, aiding in comprehending flow physics and mechanisms behind VIV. The research aims to contribute data for validating numerical models and informing engineering practices. The study employs the Navier-Stokes equation and the continuity equation to analyze fluid flow, treating it as incompressible due to negligible density changes. The three-dimensional incompressible momentum equation is discretized using the finite volume method within the spatial domain. Resolution of the pressure Poisson equation ensures compliance with free divergence conditions, enhancing computational fluid dynamics simulations' reliability. Validation of the fluid flow solver involves comparing computed drag force coefficients with established benchmarks, showing agreement within small discrepancies. The study delves into vibration behavior induced by cross flow at various reduced velocities (), noting distinct patterns ranging from irregularities at low  to quasi-periodic behavior at higher values. Analysis of maximum cylinder displacement () across different reduced velocities and mass ratios underscores the complex relationship between system parameters and displacement dynamics. A consistent occurrence of y_max at a specific reduced velocity highlights its significance, while varying mass ratios affect displacement patterns, indicating the importance of understanding these dynamics for optimizing fluid-structure interaction systems.
Co-Authors Ahmad Hamim Su’udy Alfauzi, Abdul Syukur Aminuyati An Nizhami, Avicenna Asih Priyati Aulia, Nur Fatowil A’tohillah, Muhammad Khusnul BAKTIYAR MEI HERMAWAN Berkah Fajar Tamtomo kiono Bono Bono Budhi Prasetiyo Dwiana Hendrawati Elfrida Rizky Riadini F Gatot Sumarno, F Gatot F. Gatot Sumarno, F. Gatot Giarno Giarno Hatmoko, Sumantri Hermawan, Baktiyar Mei Hidayat, Agriananta Fahmi I Gusti Bagus Wijaya Kusuma I Made Sudana I Made Widiyarta I Nyoman Gede Baliarta Ignatius Gunawan Widodo Ilfiani , Pratiwi Dian Janitra, Atikah Ayu Khoiri Rozi Khoirunnisa, Hilma Kholifah, Nevita Nur Khoryanton, Ampala Khusna, Atina Nurul Komang Metty Trisna Negara Kusuma, Mukhsinun Hadi Lily Maysari Angraini Luthfiana, Nadia Tasya Ayu Made Ery Arsana Margana Margana Margana Margana Mariani, Dina Marliyati Marliyati, Marliyati Mochammad Denny Surindra Muhammad Latifur Rochman Muhammad Yunus Muji Setiyo Mulyono Mulyono Nabila, Lathifa Dylla Nantana, Nining Rara Negara, Komang Metty Trisna Nizami, Avicenna An Nur Fatowil Aulia Nursaputro, Septiantar Tebe Nurul Qomariyah Padang Yanuar Padang Yanuar Pambudi, Yoyok Dwi Setyo Prakoso, Raden Gumilang Aji Pramesywari, Afifa Purwanto, Wawan Rachman, Iqo Yovie Rani Raharjanti Restiawan, Muhammad Mika Ramadhani Ribka Stephani Sai'in, Ali Satito, Aryo Setiawan, Trio Setiyawan, Trio Setyowati, Nur Shyu, Jin Cherng Sirajuddin Haji Abdullah Slamet Priyoatmojo, Slamet Sofia Loren Butarbutar, Sofia Loren Sudirman Sugiono, Friska Ayu Fitrianti Supandi Supriyo Supriyo Surya Abdul Muttalib, Surya Abdul Suseno, Sigit Sutanto, Bayu Suwarti Suwarti Su”™udy, Ahmad Hamim Timotius Anggit Kristiawan Totok Prasetyo Totok Prasetyo Ulum, Muhammad Showi Nailul Wahyono Wahyono Wahyu Isti Nugroho Wahyu Sulistiyo Wibowo, Andryana Dwiandara Widodo, Ignatius Gunawan Wirza, Alif Rahman Wiwik Purwati Widyaningsih Yanuar Mahfudz Safarudin Yusuf Dewantoro Herlambang Yusuf Dewantoro Herlambang Zainal Abidin Zulhan Widya Baskara Zulkarnaen Zulkarnaen