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All Journal Jurnal Teknoin Media Teknika International Journal of Applied Sciences and Smart Technologies Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Widya Teknik
Wibowo Kusbandono
Universitas Sanata Dharma
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Peningkatan Waktu Pengeringan dan Laju Pengeringan Pada Mesin Pengering Pakaian Energi Listrik PK Purwadi; Wibowo Kusbandono
Retii Prosiding Seminar Nasional ReTII ke-11 2016
Publisher : Institut Teknologi Nasional Yogyakarta

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

Abstract

Mengeringkan pakaian dengan energi matahari pada waktu musim hujan, tidak dapat diharapkanberjalan dengan lancar. Diperlukan suatu alternatip pengeringan pakaian yang dapat dihandalkanbaik pada saat musim hujan atau pada saat malam hari. Salah satu alternatipnya adalahpenggunaan energi listrik untuk pengeringan pakaian. Tujuan dari penelitian ini adalah (a)merancang dan merakit mesin pengering pakaian dengan mempergunakan energi listrik (b) melihatpengaruh pemasangan kipas di ruang pengering terhadap waktu yang diperlukan untukpengeringan dan terhadap laju pengeringan pakaian. Mesin pengering pakaian energi listrik yangdipergunakan di dalam penelitian ini mempergunakan mesin yang bekerja dengan siklus kompresiuap. Refrigeran yang dipergunakan pada siklus kompresi uap adalah R134a. Komponen utama darisiklus kompresi uap meliputi: kompresor, evaporator, kondensor, dan pipa kapiler. Jumlah mesinsiklus kompresi uap 2 buah. Daya kompresor yang dipergunakan, masing masing sekitar 1100 watt(hasil perkalian besar arus dan tegangan), sedangkan komponen utama yang lain menyesuaikan.Pengeringan pakaian mempergunakan sistem tertutup. Pengeringan pakaian di ruang pengering,mempergunakan udara hasil olahan mesin siklus kompresi uap. Udara hasil pengolahan mesinsiklus kompresi uap dialirkan ke ruang pengering dengan bantuan kipas, demikian juga ketikaudara dikembalikan dari ruang pengering ke ruang mesin siklus kompresi uap. Variasi penelitiandilakukan terhadap keadaan kipas yang ada di dalam ruang pengering pakaian (a) kondisi kipastidak bekerja dan (b) kondisi kipas bekerja. Variasi juga dilakukan terhadap keadaan awal pakaianyang akan dikeringkan (a) hasil perasan tangan dan (b) hasil perasan mesin cuci. Ada 2 kipas didalam lemari pengering, masing masing memiliki daya 90 watt. Pakaian yang dikeringkan berjenisbatik, ukuran XL, jumlah pakaian yang dikeringkan sebanyak 50 pakaian untuk sekali prosespengeringan. Ada 2 kipas yang dipergunakan untuk mengalirkan udara balik masing masing dengandaya 50 watt. Masing masing kondensor memiliki kipas tersendiri dengan daya masing masingsebesar 54 watt. Hasil penelitian memperlihatkan bahwa adanya kipas di ruang pengeringmenjadikan waktu untuk proses pengeringan pakaian menjadi lebih cepat. Jika tanpa kipas, waktuyang diperlukan untuk mengeringkan 50 pakaian basah hasil perasan tangan, selama 140 menit,sedangkan dengan adanya kipas, selama 80 menit. Terjadi pemendekan waktu pengeringan sebesar42,8%. Untuk 50 pakaian basah hasil perasan mesin cuci, waktu untuk mengeringkan pakaian tanpakipas selama 60 menit, sedangkan dengan kipas selama 35 menit. Terjadi pemendekan waktupengeringan sebesar 41,6%. Dengan adanya kipas, laju pengeringan pakaian meningkat sebesar75% untuk kondisi awal baju basah perasan tangan, dan 71,46% untuk perasan mesin cuci.Kata Kunci: kompresi uap, perasan tangan, perasan mesin cuci, kipas
The Study of 3D Simulation on Heat Transfer Enhancement on Fin Tube Heat Exchanger Using Delta Wing and Winglet Vortex Generators Mardikus, Stefan; Putri, Claudia Agata; Seen, Michael; Rines, Rines; Lukiyanto, Y. B.; Purwadianto, Doddy; Winarbawa, Heryoga; Dyaksa, Gilang Argya; Kusbandono, Wibowo
International Journal of Applied Sciences and Smart Technologies Volume 06, Issue 2, December 2024
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v6i2.10467

Abstract

The vortex generator is one of the methods to improve heat transfer augmentation on flow characteristics in the air side of the fin and tube heat exchanger. There are some models of vortex generators to produce longitudinal vortices when the airflow passes the surface of the vortex generator. In the previous studies, the longitudinal vortices were able to reduce the wake region phenomenon behind the tube heat exchanger. This research aims to investigate the thermal performance of heat transfer on the collaboration between two models of vortex generators namely delta wing and winglet vortex generators on plate fin and tube heat exchanger. The simulation used four models (1) without the vortex generator (2) with the delta wing vortex generators (3) with delta winglet (4) with the combination of delta wing and winglet. The study was generated with computational fluid dynamics. The boundary conditions were set in the inlet as velocity and the outlet as pressure outlet. The airflow of velocity is represented by Reynolds numbers in the range of 4000 - 8000 with an interval of 500. The wall temperature of the tube is given at 400 Kelvin and the temperature of the airflow is given at 300 Kelvin. The epsilon model was used in the turbulence model of the simulation. The result explained that the thermal performance of heat transfer on delta winglets improved the airflow to induce longitudinal vortices and then reduced the wake region to improve the heat transfer coefficient more than other vortex generator models
Characteristics of Straight Trapezoidal Cross-Sectional Fins under Unsteady Conditions Seen, Michael; Purwadianto, Doddy; Dyaksa, Gilang Argya; Winarbawa, Heryoga; Rines, Rines; Mardikus, Stefan; Kusbandono, Wibowo; Lukiyanto, Y. B.
International Journal of Applied Sciences and Smart Technologies Volume 06, Issue 1, June 2024
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v6i1.7989

Abstract

The aim of this research is to understand the characteristics of fins with a trapezoidal cross-section. The shape of the fin's cross-section is one of the influential factors affecting fin characteristics. In the design of fins, it is crucial to comprehend the characteristics of the fin as they relate to temperature distribution, heat transfer rate, and the efficiency of the fin. The research was conducted using numerical computation with an explicit finite difference method. Variations were made in the length of side 3 of the trapezium to 0 m, 0.02 m, and 0.04 m. The research results indicate that increasing the width of the fin enhances the temperature distribution, flow rate, and efficiency achievable by the fin. Significant improvement occurred when varying the side length from 0 m to 0.02 m, whereas subsequent variations did not considerably alter the efficiency. The highest efficiency achieved was 0.90 when the length of side 3 was 4 cm at the 300 seconds.
Inovasi Mesin Pengering Pakaian yang Praktis, Aman dan Ramah Lingkungan PK Purwadi; Wibowo Kusbandono
Widya Teknik Vol. 15 No. 2 (2016)
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v15i2.915

Abstract

Pada saat ini mesin pengering pakaian sangat diperlukan terutama pada saat musim hujan tiba atau ketika sinar matahari sulit untuk diperoleh. Tujuan dari penelitian ini adalah mendapatkan mesin pengering yang praktis, aman dan ramah lingkungan. Hasil dari pengeringan pakaian ini adalah kondisi pakaian kering yang siap untuk disetrika. Mesin pengering pakaian yang diteliti mempergunakan sumber energi dari listrik. Energi listrik dipergunakan untuk menggerakkan kompresor rotari dan kipas angin. Dalam bekerjanya, mesin pengering mempergunakan mesin siklus kompresi uap dengan komponen utama : kompresor, kondensor, pipa kapiler, evaporator dan peralatan tambahan filter. Kompresor yang dipergunakan sebanyak 2 buah, masing masing sebesar 1 PK, sedangkan ukuran komponen yang lain menyesuaikan dengan besarnya daya kompresor. Untuk mengalirkan udara, dipergunakan 2 kipas angin masing masing berdaya 54 watt. Almari pengering dirancang untuk kapasitas 20 pakaian, dengan ukuran p x l x t : 120 cm x 60 cm x 130 cm, dengan sistem terbuka. Mesin pengering pakaian yang dirakit (a) mampu mengkondisikan udara di dalam lemari tanpa beban, pada suhu udara kering (Tdb) 59,5oC dan dengan kelembaban udara (RH) sekitar 5%. (b) mampu mengeringkan 20 pakaian baju basah hasil perasan tangan sekaligus dalam waktu 120 menit dan mampu mengeringkan 20 pakaian baju basah hasil perasan mesin cuci sekaligus dalam waktu 60 menit. Untuk 15 pakaian basah hasil perasan tangan diperlukan waktu 110 menit. Kata kunci : mesin pengering pakaian, siklus kompresi uap, kecepatan pengeringan.
The Effect of Flexible Resin and Standard Resins Mixtures Variations on Dimensional Accuracy Using SLA 3D Printing Dyaksa, Gilang Argya; Aji Nugraha, Felix Krisna; Astyanto, Achilleus Hermawan; Mardikus, Stefan; Seen, Michael; Rines, Rines; Lukiyanto, Yohanes Baptista; Purwadianto, Doddy; Winarbawa, Heryoga; Kusbandono, Wibowo; Sugiharto, Budi; Hermawan, Oktavianus Nekson; Putra, Mahendra Pratama
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.12272

Abstract

The present study investigates the effect of the concentration of flexible resin on the dimensional accuracy of mixtures product manufactured by 3D printing using SLA technology. Specimens were designed and according to the ASTM D412 standard. Ten variations of resin mixtures were examined. The concentrations of the flexible resins were varied from 10% to 100%. Measurements of accuracy dimension were conducted on the fabricated specimens, and the average deviation was used to estimate the dimensional accuracy. The study reveals the least deviation in dimensions in the 10% flexible resin containing mixture and the highest in the 60% flexible resin containing mixture. The results explain the fabrication tendency of flexible resins in dimensional accuracy for 3D printing.
PENGENALAN POTENSI TEKNOLOGI MBG UNTUK PENGUATAN BUDIDAYA IKAN DI KALIAGUNG KULON PROGO SEBAGAI UPAYA PENANGANAN STUNTING Astyanto, Achilleus Hermawan; Winarbawa, Heryoga; Roshanti, Fatma; Dyaksa, Gilang Argya; Seen, Michael; Kusbandono, Wibowo; Alapan, Rines; Purwadianto, Doddy
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 8, No 1 (2025): April 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v8i1.7634

Abstract

As toddlerhood is a golden milestone during children's growth, high-protein foods like fish are strongly recommended to avoid stunting. On the other hand, a series of proper aeration is often required to support aquaculture in fish farming. Here, the technology of microbubble generators (MBG) can be properly applied. In the present work, subsequent activities which were carried out comprised the design manufacturing, installation, and also trial of MBG units, followed by site exposures. During the first exposure, two sessions covering a talk show and another practical work were conducted. The working principle of MBG was discussed in the first session, while the installation and operation were practically elaborated in the second session. Additionally, in the second exposure, several units of microbubble generators were granted to be applied to the community’s fish farming.
IMPLEMENTASI TEKNOLOGI MBG UNTUK OPTIMALISASI AERASI PADA KOLAM BUDIDAYA LELE DI KANUTAN, BANTUL Astyanto, Achilleus Hermawan; Winarbawa, Heryoga; Roshanti, Fatma; Dyaksa, Gilang Argya; Seen, Michael; Kusbandono, Wibowo; Rines, Rines; Purwadianto, Doddy; Sugiharto, Budi; Setyahandana, Budi; Mustain, Fahra Diky; Jaladri, Stefano
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 8, No 2 (2025): Oktober 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v8i2.10505

Abstract

In the present work, a simple aeration technology, utilizing the concept of a microbubble generator (MBG), was applied to an aquaculture field. It aims to support aeration by increasing the dissolved oxygen (DO) in the water. Subsequent supporting activities were carried out, comprising design, optimization and manufacturing, installation, and trials of MBG units, followed by site exposures. During one of the exposures, two sessions covering a discussion and another practical work were conducted. The working principle of the MBG was briefly explained in the first session, while the installation and operation were practically elaborated in the second session. Additionally, two units of MBG appliances were granted to be applied on the exposure site, namely Usaha Budidaya Ikan Senandung Betta. During the following exposure, the MBG implementation was evaluated through a series of DO measurements. Here, the measurement reached a range of 5.7 – 5.9 mg/L by operating the MBG. This means that the MBG increases the DO by around 1.5 mg/L.
Enhancing the Cooling Effectiveness Utilizing a Tapered Fin Having Capsule-Shaped Cross-Sectional Area Numerically Simulated Using Finite Difference Method Pratama, Nico Ndaru; Setyahandana, Budi; Purwadianto, Doddy; Dyaksa, Gilang Argya; Winarbawa, Heryoga; Seen, Michael; Rines, Rines; Mardikus, Stefan; Kusbandono, Wibowo; Lukiyanto, Y.B
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 2, December 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i2.12362

Abstract

This paper reports the results of our research on improving the cooling of an engine using fins. This problem is important to discuss because various parts of the world have utilized machining technology. When the engine operates, it produces heat. This heat reduces the efficiency of the engine's performance. In this problem, we developed a tapered fin method with a capsule cross-section to enhance cooling performance. The fin consists of two different materials that are perfectly joined. In this paper, the fin analysis is performed using the explicit finite difference numerical method. This method simulates the heat distribution on the fins. The results of our research include temperature distribution, heat flow rate, efficiency, and fin effectiveness in unsteady-state conditions with variations in material composition. The highest heat flow rate, fin efficiency, and fin effectiveness were achieved with a fin material composition of copper and aluminum, yielding an efficiency value of 0.89 and an effectiveness of 20.7. Our research results offer potential for the industry to design fins for innovative applications.
Co-Authors Achilleus Hermawan Astyanto Aji Nugraha, Felix Krisna Alapan, Rines Budi Setyahandana Budi Sugiharto Doddy Purwadianto Elang Parikesit Gilang Argya Dyaksa Hermawan, Oktavianus Nekson Heryoga Winarbawa Iswanjono Iswanjono Jaladri, Stefano Lukiyanto, Y. B. Lukiyanto, Y.B Lukiyanto, Yohanes Baptista Mustain, Fahra Diky P K Purwadi Petrus Kanisius Purwadi PK Purwadi PK Purwadi Pratama, Nico Ndaru Purwadi, PK Purwadi, PK Putra, Mahendra Pratama Putri, Claudia Agata Rines Rines Rines, Rines Rines, Rines Roshanti, Fatma Rusdi Sambada Seen, Michael Stefan Mardikus Yosef Agung Cahyanta