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Doddy Irawan
Universitas Muhammadiyah Pontianak
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Transportation Other

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ANALISA SIFAT MEKANIK MATERIAL KOMPOSIT BERPENGUAT SERAT KULIT KAYU KAPUAK MODEL LAMINA DENGAN METODE RANDOM Doddy Irawan; Eko Sanjaya; Fuazen Fuazen; Gunarto Gunarto
Suara Teknik : Jurnal Ilmiah Vol 9, No 1 (2018): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v9i1.1530

Abstract

Pada penelitian ini bahan yang dipergunakan adalah serat kulit kayu kapuak yang di susun acak dengan fraksi volume serat 20%, 30% dan 60%, serat di potong 5 cm dan 10 cm dengan perbadingan 20:80, 30:70, dan 60:40, Resin polyester BQTN 157 sebagai matrixnya, serat kayu ditimbang lalu di susun acak di dalam cetakan pembuatan spesimen dengan cara di curah manual ketebalan bahan uji impact tast 10x10 mm dengan panjang 100 mm, ketebalan bahan uji bending 4 mm panjang 100 mm, dengan acuan standar ASTM 790-02. Hasil pengujian pengaruh terhadap volume serat 20%, 30% dan 60% di mana kekuatan impact tertinggi terjadi pada prosentase perbandingan 30 : 70, volume serat 30% pada lamina 1 dan 2 yaitu sebesar 96461,6 ( J/m ). Untuk nilai tegangan impact terendah terjadi pada perbandingan 60:40 volume serat 60 pada lamina 1 yaitu 91900,6 (J/m). Tegangan bengkok tertinggi terjadi pada perbandingan 60 : 40 pada lamina 3 yaitu sebesar 201,61 (ϭb)(N/mm2). Untuk nilai tegangan bengkok terendah terjadi pada perbandingan 60 : 40 pada lamina 1 yaitu 100,80 (ϭb)(N/mm2).
The Influence of Desiccation Level of Preservation Aloe Vera Doddy Irawan
Suara Teknik : Jurnal Ilmiah Vol 1, No 1 (2010): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v1i1.302

Abstract

Aloe Gel a contained in the leaves, colerless with 99.5% of water content and0.5% solid content. This high water content empowers the chemical reaction andsome microorganism activities to take place. Therefore, we loaked into some praticalprocess so that the Aloe Gel can stay fresh longer. The efforts were concentrated onthe drying process of the leaves. A too high drying temperature will damage the gelcomponents, so the right temperature should be found to minimize the damages.A lab built cabinet dryer was used for convenient control of temperature andeasy air circulation control and timing to preserve the good nutrition and texturecharacteristics. The optimal combination of drying time and temperature was theexpected result of our research.Five time periods were selected, which one 10, 15, 20, 25, and 30 minutes,with varying temperatures. We found out that the best time was between 25 and 30minutes and temperatures between 700 and 800C. The resulting water contentsbetween 97 and 99.5%, while the consumers gave the grade 4, which meant good forthe dried gel.Keywords : Drying ,Cabinet Dryer, Preservation
RANCANG BANGUN MODIFIKASI GROUNDING TEMPORER 20KV DIKOMBINASIKAN DENGAN TELESKOPIC HOT STICK Waspodo Waspodo; Kadeni Mulhardi Bowo; Doddy Irawan; Fuazen Fuazen
Suara Teknik : Jurnal Ilmiah Vol 10, No 1 (2019): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v10i1.1542

Abstract

Perancangan ini meliputi kepedulian dengan keselamatan kerja khususnya di lingkungan kerja kelisrikan secara padam pada sisi 20kv. Salah satu penyebab kecelakaan kerja dari kelalaian pemasangan grounding temporer , perancangan ini bertujuan untuk mempersingkat, mempermudah dan mengefisiankan pekerjaan dengan cara memodifikasi alat grounding temporer yang sudah ada agar dapat dimaksimalkan sebagai sarana pendudukung pekerjaan demi terlaksanaya keselamatan kerja. Langkah awal diambil dengan memodifikasi desain alat sebelumnya yang kemudian diaplikasikan agar dapat dikombinasikan dengan teleskopic hot stick.
TRANSFER TEKNOLOGI OTOMATISASI PROSES PENGOLAHAN NIRA KELAPA MENJADI GULA KELAPA PADA KELOMPOK TANI KELAPA JAYA Raudhatul Fadhilah; Rudi Alfian; Gunarto; Doddy Irawan
Jurnal Abdi Insani Vol 11 No 1 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i1.1149

Abstract

Kelapa Jaya is a peasant group that uses nira coconut to make coconut sugar. The production process is still traditional. The farmer's group is still using a manual mixer so it takes a long complaint time, six hours. Besides, the product still does not have a brand so its sales value is still low. Therefore, it is necessary to transfer technology to accelerate the production process and increase the sales value of the product. This community partnership program (PKM) aims to: (1) transfer the efficiency technology of production processes with automatic complaints. (2) increase the sales value of products with labelling and merck. This PKM uses an action or participatory approach with the PKM team acting as a trainer, accompanist, observer, supervisor, and evaluator of the success of the program carried out by the farming group. PKM results show that the automatic nira sugar mixer can accelerate the process of grinding by 17%. The device can accelerate the re-grinding process from 6 hours to 5 hours. This can happen because of the uniform grinding and heating so that the nira clamps faster. There has been an increase in the knowledge and skills of each partner by 70%. Partners have been able to increase the sales value of the product by giving the brand and label on the coconut sugar products sold. A survey of partners showed that 100% of participants were satisfied with the program. The automatic Nira mixer successfully accelerates the coconut sugar production process. Partners have been able to produce cocoa sugar products faster and sell products with attractive packaging.
PEMBANGKIT LISTRIK TENAGA SURYA TIPE MONOCRYSTALLINE DENGAN MEMANFAATKAN ATAP GEDUNG SEBAGAI MEDIA PEMANTUL PANAS MATAHARI Eko Julianto; Nasution, Ahmad Yunus; Ripandu Sasmeidy; Fuazen; Eko Sarwono; Doddy Irawan
DINAMIS Vol. 10 No. 1 (2022): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v10i1.9021

Abstract

Pada umumnya pemasangan panel surya berada di bagian paling atas (rooftop) dari sebuah bangunan atau gedung, yang permukaannya datar dan tidak ditutupi oleh langit-langit, sehingga pancaran sinar matahari tidak terhalangi. Dikawasan perkotaan khususnya di Kalimantan Barat, sebagian besar ruangnya dipenuhi dengan bangunan-bangunan besar, sehingga memiliki potensi untuk pengembangan Pembangkit Listrik Tenaga Surya (PLTS). Desain pembangkit tenaga surya ini menggunakan empat bagian utama, bagian pertama yaitu solar panel Monocrystalline 110 wp untuk sumber utama dari energi matahari menjadi tegangan awal DC, bagian kedua yaitu charger controller sebagai pengatur arus dari panel pada battery atau penyimpanan daya dan ke beban yang dihasilkan dari solar panel tersebut, bagian ketiga yaitu inverter salah satu pengubah tegangan DC ke AC, serta bagian ke keempat yaitu beban untuk penerangan (lampu LED). Dari pengujian pada skripsi ini, penggunaan panel surya belum cukup efisien dan menghasilkan daya rata-rata pada cuaca cerah sebesar 75,03 Watt, sedangkan pada cuaca berawan sebesar 46,3 Watt. Dari segi ekonomis untuk menggantikan PLN.
Prototype of Laboratory Scale Centrifuge for Gum Crude Palm Oil (CPO) Separate Solehudin An Nur; Mursalin Mursalin; Rahmadi, Apri; Irawan, Doddy; Julianto, Eko
International Journal of Industrial Innovation and Mechanical Engineering Vol. 2 No. 1 (2025): February: International Journal of Industrial Innovation and Mechanical Enginee
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v2i1.117

Abstract

This study concentrates on the design and construction of a laboratory-scale centrifuge for the separation of gum from crude palm oil (CPO). The extraction of gum from CPO is essential in the palm oil sector to guarantee that the finished product adheres to quality standards and is safe for consumption. We engineered the prototype centrifuge to accommodate six 600-mL bottles and achieve a maximum rotational speed of 1400 rpm. The design procedure utilised Autodesk Inventor software for CAD modelling and computations to ascertain the centrifugal force, power capacity, and shaft diameter. The process of manufacturing entailed cutting and shaping stainless steel into the necessary components, subsequently followed by drilling and milling operations for mounting points and interfaces. We implemented surface treatment to augment corrosion resistance and elevate visual appeal. The assembling procedure encompassed component integration, motor incorporation, and control system configuration. The experimental configuration involved centrifugal testing utilising 600-mL glass bottles with time intervals of 10, 20, 30, and 40 minutes at an average rotational speed of 924 rpm. The experiment showed that the centrifuge worked well to separate the gum and other contaminants from the CPO. The best separation happened after 40 minutes of centrifugation.
A Comparative Study of the Effect of Paraffin Phase Change Material Mixture and Ice Bag on Temperature Control in Bricks Fahrurrozi Fahrurrozi; Iwan, Muhammad; Irawan, Doddy; Gunarto Gunarto; Fahrezi, Dian; Govari, Muhammad Khoirul
International Journal of Industrial Innovation and Mechanical Engineering Vol. 2 No. 1 (2025): February: International Journal of Industrial Innovation and Mechanical Enginee
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v2i1.118

Abstract

The goal of the article is to improve the thermal properties and energy efficiency of the walls and facades of the buildings by introducing the phase change material in the bricks. This study focuses on the thermal insulation capabilities of a paraffin-ice bag PCM mixture, aiming to enhance the thermal inertness of the bricks. The paraffin wax exhibits a high latent heat and is chemically stable, while the ice bags, with their low temperatures, serve as effective thermal regulators. They complement each other to address challenges such as the low thermal conductivity of paraffin and the leakage of low phase change transition temperature in paraffin. We made use of two types of paraffin and ice bag PCMs in a 50:50 ratio and embedded them in standard bricks. During the experiment, we coated the brick surfaces with liquid cement to enhance the hydraulic resistance of the PCM. Next, we inserted wires known as packing plugs into the bricks and filled the holes with powders. We also subjected the bricks to heating and cooling in cycles, ensuring the temperatures remained within a specified range. During the experiment, temperature sensors were utilized to capture data concerning thermal performance. The authors reached the conclusion that PCM polymer composite bricks possess a lot of promise such walls are being able to maintain their thermal performance parameters. When PCM-enhanced bricks are utilized, temperature changes were significantly restricted, staying constant during the times of peak heating and cooling. The PCM bricks also displayed efficient absorption and gradual release of energy due to the high energy transfer rates during phase change. This study suggests that PCM polymer composite bricks are cost-effective for the energy performance of buildings.
Experimental Study of Conduction Heat Transfer Using Paraffin Phase Change Material on Bricks Fahrezi, Dian; Irawan, Doddy; Iwan, Muhammad; Julianto, Eko; Fahrurrozi Fahrurrozi; Govari, Muhammad Khoirul
International Journal of Industrial Innovation and Mechanical Engineering Vol. 2 No. 1 (2025): February: International Journal of Industrial Innovation and Mechanical Enginee
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v2i1.120

Abstract

This research examines the effect of bricks enhancement with phase change material (PCM) consisting of paraffin on their thermal considerations. The experimental methods were aimed at investigating the mechanisms of temperature transfer throughout the thermal rounds, mimicking diurnal fluctuations of temperature. Due to the high amount of latent heat contained in paraffin a portion of it was transferred into regular bricks with temperature probes tracing the heat processes. It is shown that enhancement of bricks with PCM reduced temperature range and controlled the rate of heat transmission more than the ordinary bricks did. It was significant that the PCM-embedded bricks did not drift in heat and were able to stock up excess heat during the day and release it at night which resulted in monumental energy efficiency and comfort in thermal standing. The conversation additionally seeks to bring out the function of paraffin in insulation which does not only save energy consumption but goes forward to maintain comfortable temperatures within the building. The study finally achieved its goal and assert that energy saving with the use of PCM enhanced bricks in construction makes it a preferable material in regards to energy and the fight against climate change.
An Experimental Study of Conduction Heat Transfer Using Phase Change Material Ice Bag Gel in Bricks Govari, Muhammad Khoirul; Iwan, Muhammad; Irawan, Doddy; Gunarto Gunarto; Fuazen Fuazen; Fahrezi, Dian; Fahrurrozi Fahrurrozi
International Journal of Industrial Innovation and Mechanical Engineering Vol. 2 No. 1 (2025): February: International Journal of Industrial Innovation and Mechanical Enginee
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v2i1.122

Abstract

This experiment investigates the heat transfer characteristics of an ice bag gel phase change material (PCM) incorporated within bricks. The study seeks to investigate the performance of ice bag gel as PCM in improving thermal behavior of building material. The experiment consisted of subjecting brick samples with and without ice bag gel PCM to thermal cycles in a semi-automated laboratory setup. The results indicate that ice bag gel PCM incorporated in bricks exhibited minimal changes and better heat transfer as compared to the dry bricks. It was observed that the ice bag gel PCM registered lower peak temperature and slower rates of temperature drop which means their heat storage and release characteristics were efficient. Furthermore, the ice bag gel system produced a steady radiation flux, indicating that it was able to minimize the effects of temperature variations. These results imply that ice bag gel PCM has the potential to be a green and economical option for enhancing thermal comfort and decrease energy consumption in buildings.
TRANSFORMASI USAHA SAMPAN PADA KELOMPOK MASYARAKAT SUNGAI MELALUI OTOMATISASI DAN STRATEGI PEMASARAN INOVATIF Sukardi Sukardi; Raudhatul Fadhilah; Gunarto Gunarto; Doddy Irawan; Rudi Alfian
Jurnal Abdi Insani Vol 11 No 3 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i3.1949

Abstract

Area-based development emphasizes the optimal management of local resources to achieve community welfare. Kampung Beting, Pontianak, has great potential in transportation and river tourism but is hindered by a negative stigma as a center for drug trafficking. Through community service programs, business transformation is applied to the boat mining group with automation, installing waterproof canopies, using solar cell lights, and rebranding. The results show increased operational efficiency, revenue, and a regional image change. Innovative marketing strategies that capitalize on historical and cultural potential have successfully enhanced tourist attraction and local community welfare.
Co-Authors Apri Rahmadi Asrul Abdullah Bagus Rahardian Dedy Alamsyah Dewi, Ria Risti Komala Eko Julianto Eko Sanjaya Eko Sarwono Evan Susanto Fadhilah, Raudhatul Fahrezi, Dian Fahrurrozi Fahrurrozi Fuazen Fuazen Govari, Muhammad Khoirul Gunarto Gunarto Gunarto Gunarto Gunarto Gunarto Iwan, Muhammad Kadeni Mulhardi Bowo Linda Suwarni Miftahuljannah Miftahuljannah Mursalin . Mury Rahadi Nasution, Ahmad Yunus Neni Triana Rahardian, Bagus Rahmad Ramadhan Ripandu Sasmeidy Rudi Alfian Selviana Solehudin An Nur Suje'i Suje'i Sukardi Sukardi Waspodo Waspodo Waspodo, Waspodo