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All Journal International Journal of Electrical and Computer Engineering Jurnal Energi Dan Manufaktur Logic : Jurnal Rancang Bangun dan Teknologi Jurnal Teknologi Terapan Bhakti Persada Jurnal Aplikasi IPTEKS International Journal of Marine Engineering Innovation and Research Logic : Jurnal Rancang Bangun Dan Teknologi
Adi Winarta, Adi
Jurusan Teknik Mesin, Politeknik Negeri Bali
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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UJI VISUAL THERMOGRAPHY PADA OSCILLATING HEAT PIPE Sukadana, Ida Bagus Putu
Jurnal Teknologi Terapan Vol 5, No 1 (2019): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (275.171 KB) | DOI: 10.31884/jtt.v5i1.163

Abstract

Oscillating Heat Pipes one of the new family of heat pipe is two-phase heat transfer technologies with excellent performance capabilities, simple structure and low production costs. As one of the non-intrusive method in temperature measurement, thermography observation in OHP still very rarely to use although the result was able to explain the relation between temperature oscillation and fluidic motion of fluid. Furthermore this paper aims to study the behavior of thermal profile with the thermography observation. Water with filing ratio (45%) has been chosen as the working fluid for the close loop OHP. The heating power was varying into the evaporator section of OHP from 12 until 142 Watt. It was found that thermography observation very useful tools to define internal flow pattern inside OHP channel. Intermittent oscillation, circulation and dry-out phenomenon was captured more better than conventional temperature measurement. The lowest thermal resistance was found 0.234 °C/W corresponding with 3210 Watt/mK effective thermal conductivity at heat input 142 Watt.
Aplikasi PCM Bees Wax sebagai teknologi penyimpan energi (thermal energy storage) pada pemanas air domestik Adi Winarta; Muhammad Amin; Nandy Putra
Jurnal Energi Dan Manufaktur Vol 8 No 2 (2015): Oktober 2015
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.43 KB)

Abstract

Abstrak:Sistem pemanas air merupakan salah satu pengguna energi terbesar pada industri perhotelan selain pengkondisian udara dan penerangan. Temperatur air yang dihasilkan pada sistem pemanas air domestik biasanya berkisar antara 55-65°C. Phase Change Material (PCM) sebagai salah satu teknologi thermal storage dapat dimanfaatkan untuk meningkatkan efisiensi penggunaan energi listrik pada sistem pemanas air. PCM memanfaatkan kalor laten untuk menyimpan energi dan melepaskannya pada kondisi yang diinginkan. Pada penelitian ini diuji sebuah sistem pemanas air domestik dengan volume air sebesar 100 liter. Sumber kalor pada pemanas ini menggunakan heater listrik dengan daya total 3000 Watt. Sejumlah PCM diletakkan didalam drum pemanas air sebagai thermal storage dengan tujuan mempertahankan temperatur air pada suhu 60C sehingga penggunaan listrik oleh heater dapat dikurangi. Material PCM menggunakan bahan organik lilin lebah atau bees wax yang memiliki titik leleh 52°C-66°C. Bees wax ditempatkan pada kontainer yang terbuat dari pipa tembaga dengan diameter dalam 38,1 milimeter dan panjang 260 mm. Pengujian dilakukan dengan menguji tiga variasi massa PCM yakni 1,9 kg, 5,1 kg, dan 7,3 kg. Hasil pengujian menyatakan bahwa penggunaan PCM 1,9 kg memiliki waktu penundaan heater yang paling lama yakni 1 jam 6 menit 40 detik. Penggunaan PCM masih memiliki penggunaan daya yang lebih besar dibandingkan tanpa PCM yakni 12,93 kJ pada masa PCM 1,9 kg, 13,88 kJ pada 5,1 kg PCM dan 14,803 kJ pada 7,3 kg masa PCM. Kata kunci: Phase Change Material (PCM), Beewax, Domestic Water Heater.Abstract:Water heating system is one of the largest energy users in the hospitality industry, in addition to the air conditioning and lighting. The temperature of water which is produced on the domestic water heating systems typically range between 55-65°C. Phase Change Material (PCM) as one of the thermal storage technology can be utilized to improve the efficiency of energy use in water heating systems. PCM utilizes latent heat to store energy and release it at the desired conditions.This study tested a domestic water heating system with 100 liters water volume. The heat source in heating is using an electric heater with a total power of 3000 Watts. A number of PCM is placed inside the water heater drum as a thermal storage to maintaining the temperature of the water keep at 60°C, so that the use of electricity by the heater can be reduced. PCM material using organic materials such as bees wax which has a melting point of 52°C - 66°C. Bees wax is placed in containers made of copper pipe with an inner diameter of 38.1 millimeters and a length of 260 mm. Testing is done by testing five variations of the PCM mass 1,9 kg, 5,1 kg, and 7,3 kg. The test results stated, with the latent heat 0,242 kJ/g bees wax is capable to maintaining the temperature of water at 65°C for 116.6 minutes. Keywords: Phase Change Material (PCM), Bees Wax, Pemanas air domestic Keywords : Phase Change Material (PCM), Bees Wax, Pemanas air domestic
PENGARUH JARAK SUDU PENGARAH (GUIDEVANES) PADA ELBOW DUCTING TERHADAP PRESSURE DROP Adi Winarta; DaudSimon Annakotapary
Logic : Jurnal Rancang Bangun dan Teknologi Vol 13 No 2 (2013): July
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.091 KB)

Abstract

Padasistemrefrigerasiterpusatducting memiliki peranan yang sangat penting dalam distribusiudara yang akan maupun telah terkondisikan.Padasistem yang sederhana,udaradidalamductingmengalirdariruangan yang dikondisikanmenuju AHU (Air Handling Unit) dankembalilagimenujuruangantersebut. Blowerberfungsimenciptakanperbedaantekananpadaductingsehinggaudaradapatmengalirdarisisireturndanakhirnyak embalikesupply. Selama mengalir di dalam ducting udara mengalami berbagai hambatan sehingga terjadi pressure drop. Salah satu faktor penghambat adalah perubahan arah aliran yang disebabkan adanya belokan pada ducting. Hambatan yang terjadi pada elbow disebabkan olehgesekan (friction loss) danseparasialiran (separation loss).Kegiatanpenelitianiniadalahuntuk mengkaji fenomena aliran udara dengan Angka Reynolds, RE = 3.824 x 104pada rectangularelbow serta mengetahui bagaimana pengaruh pemasangan pengarah (guide vanes) yang memiliki jarak yang berbeda-beda. Berdasarkan data hasil penelitian, ternyata jarak kerapatan guide vanes(sudu pengarah) mempunyai andil terhadap pressure drop. Dari grafik terlihat bahwa pemasanganguide vanesmampumengurangipenurunantekananaliranfluidasaatmelaluielbow. Pemasanganguide vanesdengankerapatan 2,3 cmmenghasilkan pressure drop terkecilyaitu9,15%. Padakerapatanberturut-turutsebesar 1,8 , 1,5 dan 1,2 terjadikenaikanpressure dropsecaraperlahan. Dapat disimpulkan bahwa pemasangan guide vanes pada elbowdapat dijadikan suatu acuan dalam perancangan ductingHVAC sehingga dapat mengurangi penggunaan energi pada blower.
PENGOLAHAN JAJAN BEGINA DAN ULI DENGAN MENGGUNAKAN MESIN VACUUM FRYER BAGI PEMBUAT JAJAN BEGINA & ULI Luh Putu Ike Midiani; Adi Winarta; I Gusti Agung Oka Sudiadnyani
Bhakti Persada Jurnal Aplikasi IPTEKS Vol 1 No 1 (2015): November 2015
Publisher : P3M Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.622 KB)

Abstract

Pengeringan jajan begina dan uli bertujuan untuk mengurangi kadar airnya. Proses pengeringan ini sering mengalami hambatan karena masih menggunakan cara tradisional yaitu dengan cara menjemur dibawah sinar matahari. Kurangnya intensitas panas matahari menyebabkan pengeringan jajan begina dan uli tidak optimal. Akibatnya jajan begina dan uli yang dihasilkan akan berkurang baik dari segi jumlah maupun kualitas. Untuk itulah perlu diperbaiki aspek teknik produksi dan manajemen produksi sebagai salah satu solusi dalam menekan biaya proses dan meningkatkan kualitas sehingga produk jajan begina dan uli ini mampu bersaing dan memenuhi permintaan pasar yang ada. Perbaikan teknik produksi dilakukan dengan penggunaan teknologi tepat guna sesuai dengan sumber daya pembuat jajan begina dan uli. Dengan mesin vacuum fryer ini jajan begina/uli tidak perlu lagi dijemur, karena dengan mesin vacuum fyer proses pengeringan digantikan dengan proses penggorengan dan pemvakuman atau pengurangan kadar uap airnya. Sehingga hal ini mempersingkat proses pembuatan jajan begina/uli. Selanjutnya pembuat jajan begina dan uli diberikan pengetahuan dan pemahaman tentang manajemen keuangan, pemasaran produk dan strategi pemasaran. Manajemen keuangan diberikan kepada pembuat jajan begina dengan melatih penggunaan program excel untuk seluruh administrasi keuangan dan strategi pemasaran diberikan dengan membuat label produk dan brosur produk jajan begina dan uli sehingga produk jajan begina dan uli memiliki nilai tambah bagi pengembangan usaha pembuatan jajan begina dan uli. Penggunaan mesin vacuum fyer mampu mempersingkat waktu proses produksi jajan begina dan uli, kualitas dan kuantitas jajan begina dan uli pun tidak terpengaruh oleh cuaca. Perbaikan metode pemasaran dilakukan dengan pembuatan kemasan, pelabelan produk dan pembuatan brosur untuk mengembangkan wilayah pemasaran. Dari segi manajemen keuangan dilakukan penataan administrasi keuangan dengan menggunakan program excel.
Design and Performance Testing of a 3D Printed Mini DC Powered Pump for Microbubble Generator Tulus Hidayat Yusanto; James Julian; Fitri Wahyuni; Adi Winarta; I Wayan M. Managi Marlon Managi
International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.18826

Abstract

Centrifugal pumps are the most commonly utilized in industries, agriculture, and households. In the microbubble generator, the centrifugal pump is driven by a DC motor for efficiency. This research was conducted to determine the optimal centrifugal pump design for microbubble generators using 3D-printed PLA material. The pump drive uses a brushless DC motor. With impeller dimensions r1=16mm, r2=26mm, β1=46.8, β2=62.8, and number of blades = 8, the resulting head is 2m at a constant operational current of 3A and a flowrate of 0 L/m. The same operational current input yields a maximum flow rate of 14 L/min with a head of 0.5 m. Maximum head exists when there is no liquid on the outlet side. At current ≥ 6.5A, there is a deviation from the previously formed trend. The input power of 58W is generated when the maximum flow rate is 25L/m. Maximum efficiency can be achieved as the input current increases to ≤6.5A and 18L/m. At conditions ≥6.5A, efficiency decreases drastically as the input current increases. This centrifugal pump design can work optimally at a constant input current of 6.5A with an input power 58W for the microbubble generator.
Enhancing the accuracy of low-cost thermocouple devices through deep-wavelet neural network calibration Julian, James; Wahyuni, Fitri; Dewantara, Annastya Bagas; Winarta, Adi; Putra, Nandy
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 3: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i3.pp2625-2633

Abstract

Data collection using thermocouple sensors in low-cost data acquisition is prone to noise interference, which could reduce the data quality. Noise sources such as cold junction compensators, electromagnetic interference, and Johnson noise can significantly affect the reliability and accuracy of conventional measurements. This study aims to improve the quality of thermocouple sensor readings on low-cost data acquisition using calibration method based on deep learning and the denoising process using a wavelet transform. This taken approach successfully increase the accuracy value of 97.67% with a mean absolute error (MAE) of 0.2. The precision also increases of 262.7% as indicated by the result of signal-to-noise ratio (SNR) with a value of 105.29 dB. Comparative analysis was carried out against National Instruments® device and it was found that deep-wavelet method had a lower and higher of MAE and SNRdB values of 16.67% and 0.8% respectively. This study shows that the denoising-calibration method with deep-wavelet can improve the accuracy and reliability of data from low-cost thermocouple devices.
Performance Analysis of Thermoelectric Cooler Box with Water Cooling Block (WCB) and Heat Sink Fan Sutina, I Wayan; Winarta, Adi; Saputra, I Nyoman Agus Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.93-99

Abstract

Thermoelectric cooler boxes offer an environmentally friendly, energy-efficient, and portable cooling solution. However, the performance of thermoelectric cooling systems is highly dependent on the effectiveness of heat dissipation on the hot side of the Peltier module (TEC). This study aims to experimentally investigate the impact of using a Water Cooling Block (WCB) compared to a conventional heat sink fan on the cooling performance of a thermoelectric-based cooler box. The experimental setup involved two configurations for the hot side cooling system, where parameters such as hot-side temperature, cabin temperature, and Coefficient of Performance (COP) were measured and analyzed. The experimental results showed that the use of WCB was able to significantly reduce the temperature on the hot side, with a temperature reduction in the cabin reaching 20.35 °C and an average COP of 0.09687. Meanwhile, the TEC-fan temperature in the cabin cooler box was lower at 21.45 °C, with an average COP value of 0.04718. Therefore, the Water Cooling Block demonstrates superior efficiency and thermal management compared to the heat sink fan, offering enhanced performance for thermoelectric cooler box applications in various low-temperature storage needs.
Co-Authors DaudSimon Annakotapary Dewantara, Annastya Bagas Fitri Wahyuni Fitri Wahyuni I Gusti Agung Oka Sudiadnyani I Wayan, Marlon Managi James Julian Luh Putu Ike Midiani Muhammad Amin Nandy Putra Nandy Putra Saputra, I Nyoman Agus Adi Sutina, I Wayan Tulus Hidayat Yusanto