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Harjadi Gunawan
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Kajian Sistem Tata Udara pada Proses Tableting di Industri Farmasi Gunawan, Harjadi; Adiriwanto, Devin
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 8 No 2 (2022): OKTOBER 2022
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v8i2.4987

Abstract

Sistem tata udara memegang peranan penting dalam industri farmasi. Hal ini disebabkan karena untuk memberikan perlindungan terhadap lingkungan tempat pembuatan produk, memastikan produksi obat yang sesuai standar sehingga mengurangi resiko material terkontaminasi, memberikan lingkungan kerja yang nyaman bagi pekerja. Untuk menentukan jenis dan kapasitas Air Handling Unit (AHU) di pabrik farmasi sehingga tidak menyebabkan pemborosan energi dan biaya, diperlukan perhitungan beban pendinginan. Tujuan dari penelitian adalah mengkaji jumlah supply air yang diperlukan untuk pengkondisian temperatur dan Relative Humidity (RH) pada sistem tata udara untuk bagian pembuatan tablet di pabrik farmasi. Berdasarkan standar yang ada, supply air flow yang diperlukan untuk ruang Mixing adalah 1724,4 Cubic Meter per Hour (CMH), untuk ruang Tablet Press sebesar 1838,8 CMH, untuk ruang Primary Packaging adalah 2483,136 CMH dan ruang Weighing adalah 508,4 CMH. Selain itu, supply air flow sangat dipengaruhi oleh peningkatan tekanan differential yang dibutuhkan untuk kondisi clean room dan kondisi kebersihan dari filter di jalur supply air.
Analisis Pengaruh Modifikasi Pressure Reducing Valve Terhadap Range Pressure Drop Aliran Uap Anwar, Kelly; Gunawan, Harjadi; Tobing, Sheila
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 10 No 1 (2024): APRIL 2024
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v10i1.5483

Abstract

Pressure Reducing Valve (PRV) is a control valve designed to reduce upstream pressure to downstream pressure on fluid flow. When operating, a PRV is in an equilibrium condition because of the forces acting on it, such as fluid resultant force, membrane force, and spring force. On some working conditions, a PRV cannot operate because the equilibrium is unattainable by the spring that deflects further than the maximum allowable limit and unable to produce force balancing out other forces. Therefore, a modification on the spring wire diameter from 17 mm to 20 mm is conducted without altering other PRV parts dimension and geometry. The modified spring will be analysed through analytical analysis and simulation analysis with Ansys software. On the same working conditions with the enlargement of the spring wire diameter, the deflection that once was 99,28 mm decreases to 42,64 mm and does not exceed the maximum limit at 74,375 mm so the PRV can operate on said condition and the pressure drop range increases from 7 bar to 9 bar.
PENGEMBANGAN ALAT PERAGA PANEL SURYA SEBAGAI MEDIA PEMBELAJARAN DI SMA TARAKANITA GADING SERPONG Darmawan, Marten; Gunawan, Harjadi; Pranawa, Kertarta; Mustika, Donny; Soewono, Arka
Jurnal Abdimas Bina Bangsa Vol. 5 No. 2 (2024): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v5i2.1246

Abstract

Tarakanita Gading Serpong Senior High School aims to be an educational institution as well as a research center that adheres to the concept of education for sustainable development. Therefore, the staff of Tarakanita Gading Serpong High School wanted a teaching module that could serve as a learning tool for students, as well as a research instrument for the staff to study the use of renewable energy sources in the form of solar power. To meet their needs, a prototype of a small solar module that can simulate how a solar panel works and measure its output voltage, current, and electrical power was designed and built. The module is equipped with a 50 Wp polycrystalline solar panel, a solar charge controller to regulate the distribution of electric current, an 18 Ah battery to store energy, and an electrical load in the form of an 18-Watt light bulb.  The solar module is designed to be easily moved and operated indoors or outdoors. When the module is indoors, a 75 W Halogen UV lamp is used as a proxy for sunlight. Hopefully, this solar module can serve as an effective learning medium to introduce the use of solar power as a renewable energy source for Tarakanita Gading Serpong High School students.
UPAYA REVITALISASI OBYEK WISATA CURUG PONGGANG MELALUI PEMASANGAN SUSURAN TANGGA SEPANJANG AKSES JALAN PENDAKIAN Soewono, Arka Dwinanda; Darmawan, Marten; Turnip, Juan Karell Fitzgerald; Gunawan, Harjadi
Jurnal Abdimas Bina Bangsa Vol. 5 No. 2 (2024): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v5i2.1304

Abstract

Ponggang Village, located in Subang Regency, West Java, possesses a tourist attraction in the form of Ponggang Waterfall. However, the management of Ponggang Waterfall as a tourist attraction still needs more attention. One of the challenges is that access to Curug Ponggang goes through a fairly steep trail, which still needs to be equipped with a railing to separate the road from the ravine, so the level of safety still needs to be improved. Therefore, the purpose of the service activities carried out by the Community Service Program team from the Faculty of Engineering at the Atma Jaya Catholic University of Indonesia is to design and build suitable railings on the access trail from Ponggang village to Curuk Ponggang to improve safety, comfort and smooth activities for village residents and visitors. The stair railing will be made from PVC pipe, steel wire, and jute rope. The existence of the railing will increase the potential of Ponggang Waterfall as a tourist attraction, especially for domestic tourists.
RANCANG BANGUN ALAT PENGERING IKAN ASIN EFEK RUMAH KACA BERBENTUK PRISMA SEGI EMPAT UNTUK PEDAGANG IKAN ASIN DI PASAR MODERN BSD Soewono, Arka D.; Darmawan, Marten; Gunawan, Harjadi
Jurnal Abdimas Bina Bangsa Vol. 6 No. 1 (2025): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v6i1.1677

Abstract

According to the SNI 01-2721-1992 standard, the permissible moisture content for fish is around 40%. However, fresh fish naturally contains more than 40% water. To meet this standard, fish must undergo a drying process. In Indonesia, salted fish is commonly prepared by sun-drying the fish on bamboo mats. However, this method has several drawbacks, such as requiring large areas of land, heavy dependence on weather conditions, long drying times, and the risk of contamination by dust and dirt. One solution that has been developed is an artificial drying method using a greenhouse effect. In this activity, a drying tool shaped like a rectangular prism was designed and equipped with stones at the bottom to store heat and exhaust at the top. This tool was tested by comparing the mass of the fish before and after drying. The results showed that the fish's initial mass of 24.22 grams decreased to 21.28 grams after being dried for 2 days at an average temperature of 36.7°C.
PEMANFAATAN ALAT PENGUPAS NANAS DENGAN SISTEM PRESS UNTUK PEDAGANG NANAS MADU DI TANGERANG SELATAN Gunawan, Harjadi; Darmawan, Marten; Soewono, Arka Dwinanda; Basoeki, Prita Dewi; Nahak, Demetrio; Pote, Juan William; Tobing, Sheila
Jurnal Abdimas Bina Bangsa Vol. 6 No. 1 (2025): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v6i1.1678

Abstract

The traditional process of peeling a pineapple using a knife is complex and time-consuming. Therefore, a specialized peeler is needed to increase the productivity of honey pineapple peddlers located in the Cisauk area, South Tangerang. The objective of this service activity is to design a prototype of a pineapple peeler using press technology that can peel pineapples more quickly and efficiently, and produce more precise and uniform cuts. This pineapple peeler consists of a knife ring with a diameter of 11-12 cm. It is also equipped with a spring system with an inner diameter of 30 mm, an outer diameter of 41 mm, and a length of 206 mm which functions as part of the mechanism to automatically return the knife ring and pressing lever to their original position. The knife and spring components are made from food-grade Stainless Steel 316 and 304, rsepectively. The test results show that the prototype peeler can peel honey pineapple measuring 10-12 cm in diameter in an average time of 13.11 seconds. It is hoped that the use of this peeler can help increase the productivity of small pineapple peddlers, as well as reduce their burden and work risks.
Pemanfaatan Stasiun Pengisi Daya Listrik Berbasis Energi Surya Di SMA Tarakanita Gading Serpong Darmawan, Marten; Soewono, Arka Dwinanda; Gunawan, Harjadi; Beavis, Louis Eric; Halim, Bennettdei Shajila Shane
CARADDE: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2025): Agustus
Publisher : Ilin Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31960/caradde.v8i1.3021

Abstract

Institusi pendidikan seperti Sekolah Menegah Atas (SMA) Tarakanita Gading Serpong memiliki kebutuhan listrik yang besar untuk mendukung kegiatan belajar-mengajar sehingga diperlukan suatu stasiun pengisi daya yang memanfaatkan sumber energi ramah lingkungan. Oleh karena itu, tim pengabdi melakukan rancang bangun purwarupa stasiun pengisi daya berbasis panel surya yang dapat dipakai untuk mengisi gawai dan peralatan elektronik lainnya. Stasiun pengisi daya tersebut terdiri dari panel surya tipe polycrystalline 100 Watt, solar charge controller untuk pengaturan daya, baterai kering 33Ah untuk menyimpan kelebihan energi, dan inverter untuk menghasilkan arus listrik bolak-balik. Hasil pengujian menunjukan bahwa stasiun pengisi daya dapat berfungsi dengan baik di mana proses pengisi baterai smartphone 4500 mAh dapat dilakukan dalam kurun waktu sekitar 3 jam. Sosialisasi penggunaan dan perawatan stasiun pengisi daya kemudian dilaksanakan di mana para peserta yang terdiri dari perwakilan staf pendidik dan kependidikan SMA Tarakanita Gading Serpong menunjukan antusiasme yang tinggi pada saat mengikuti pelatihan. Hasil evaluasi kegiatan berbasis kuesioner menunjukkan bahwa perwakilan mitra merasa sangat puas terutama dari segi kegunaan dan manfaat stasiun pengisi daya. Diharapkan keberadaan stasiun pengisi daya ini dapat mendukung upaya mengurangi penggunaan sumber listrik berbasis fosil di lingkungan sekolah, serta menjadi media edukasi terkait penggunaan energi terbarukan bagi siswa-siswi Tarakanita Gading Serpong.
Rancang Bangun Kotak Penerima Paket Pintar Gunawan, Harjadi; Aldily, Kevin; Shandyanto, Valencia Angelica; Darmawan, Marten
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 9 No 2 (2023): OKTOBER 2023
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v9i2.4979

Abstract

Aktivitas manusia telah berubah dari waktu ke waktu. ketika teknologi belum ditemukan, semuanya rumit. Namun kini, penemuan teknologi telah membantu kita dengan cara yang lebih efektif dan lebih mudah. Hal ini membuat aktivitas kita sehari-hari menjadi jauh lebih mudah. Seiring dengan perkembangan teknologi yang pesat, proses jual beli menjadi lebih mudah karena dapat dilakukan melalui e-commerce. Namun, hal tersebut berdampak pada beberapa orang seperti orang menjadi tidak produktif dalam bekerja karena khawatir dengan kemasannya. Seringkali, ada paket yang datang dengan kondisi tidak sesuai harapan, serta tidak higienis karena telah mengalami banyak kontak dari orang-orang. Oleh karena itu, dibuatlah kotak penerima paket pintar (Smart Package Receiver) berbasis IoT menggunakan modul Wi-Fi ESP8266. Teknologi ini membantu menghilangkan kekhawatiran tentang kebersihan paket. Ketika kurir memasukkan paket ke dalam kotak, modul akan segera mengirimkan notifikasi melalui aplikasi discord ke perangkat-perangkat penerima. Kemudian, Sinar UV akan dipaparkan ke paket untuk mensterilkannya. Tujuan dari Smart Package Receiver adalah untuk menciptakan suatu sistem yang memudahkan masyarakat dalam menerima paketnya, juga menguntungkan bagi kurir dan penerima.
PHYSICAL-MECHANICAL PROPERTIES OF PINEAPPLE LEAF FIBRE REINFORCED IN UNSATURATED POLYESTER RESIN FILLED WITH CALCIUM CARBONATE Rachman, Maulana; Kasda, Kasda; Komara, Achmad Moeslihat; Gunawan , Harjadi; Setyanto, Djoko
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1451

Abstract

Using natural fibres is often recommended as polymer composite materials owing to their potential to reduce the pollution of synthetic material waste. This study aimed to obtain the physical properties of unsaturated polyester resin matrix composite containing calcium carbonate fillers of 15 and 30 parts per hundred weights of the resin and natural pineapple leaf fibre of the amount 20% and 30% of the composite weight. The composite samples were three millimetres thick, with the pineapple leaf fibres arranged in one longitudinal direction. Some parameters observed included density, water absorption, response to fire, hardness, tensile strength, modulus of elasticity, and impact strength. The results showed that adding calcium carbonate filler into the matrix increased the density, water absorption, hardness, and modulus of elasticity of the composite. However, it reduced the flame propagation rate, tensile strength, and impact strength. Also, the use of pineapple leaf fibre contributed to increased water absorption, rate of flame propagation, tensile strength, modulus of elasticity, and impact strength of the composite, but it reduced the density and hardness. As these samples use economical materials, they are likely valuable for building materials that do not require high mechanical properties, especially guttering materials.
Co-Authors Adiriwanto, Devin Aldily, Kevin Andre Sugioko Anwar, Kelly Arka Dwinanda Soewono Beavis, Louis Eric Christiand Djoko Setyanto Ferdinand Fernandi Gavin Alferio Gavin Alferio Hadiyatno, Tri Halim, Bennettdei Shajila Shane Isdaryanto Iskandar Kasda, Kasda Komara, Achmad Moeslihat Luky Andreas Mariano, Benedicktus Marten Darmawan Maulana Rachman Mustika, Donny Nahak, Demetrio Nanda Viriya Pote, Juan William Prabowo Wirahadi Pranawa, Kertarta Prita Dewi Basoeki Robertus Adi Kurniawan Rory Anthony Hutagalung Sandra Octaviani B. Widiarto Shandyanto, Valencia Angelica Soewono, Arka Soewono, Arka D. Sri Hapsari Wijayanti Tjahjadi, Fanny Tobing, Sheila Tri Hadiyantno Trifenaus Prabu Hidayat Turnip, Juan Karell Fitzgerald Williana, Catherine Wirahadi, Prabowo Yohandri Bow Yuwana, Vincent