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Doddy Irawan
Universitas Muhammadiyah Pontianak
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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.
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.
Tensile Test of Chicken Feather Fibre Composite Material and Application Firmansyah, Arfin; Irawan, Doddy; Fuadzen Fuadzen; Sarwono, 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.v2i1.119

Abstract

The purpose of this study is to perform the tensile tests on chicken feather fiber composites to evaluate their potential in practical engineering applications. The study employed the experimental method as a laboratory activity, in which chicken feathers fibers were fused with epoxy resin at different ratios of 5%, 10%, 12% and 14% to form composite specimens. In order to find the ultimate tensile strength, yield strength and the modulus of elasticity of the composites, tensile testing of the composites was done according to the the American Society of Testing and Materials (ASTM) D3039 standard test method. Results showed that in as low as 5% cement reinforcement of chicken feathers, the mechanical properties of the resin were greatly improved, with the ultimate tensile strength reaching 48.672 N/mm² and the yield strength being 39.168 N/mm². This shows the promise of using chicken feather fiber composites as strong and light materials that are also eco-friendly for various uses. The discussion topics mentioned the behavior of stress-strain transition from elastic to plastic region on increasing the load, which showed the strength and flexibility of the composites are in essence, the opposite of each other. This study advances the view that there is more development to be done on chicken feather fiber composites to enable them satisfy the standards of various sectors thereby offering an environmentally friendly method in cutting waste and reducing the burden of the environment from synthetic materials.
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.
Effect the Viscosity of Used Oil by Adding Chitosan Based on Shellfish and Cellulose Fasya, Muhammad; Irawan, Doddy; Fadhilah, Raudhatul; Gunarto Gunarto
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.v2i1.121

Abstract

This study explores the innovative use of chitosan from shellfish and natural cellulose as an additive to decrease the viscosity of used lubricating oils. We synthesized and applied chitosan and cellulose as adsorbents to filter impurities and enhance the rheological properties of the oil. During the experiment, different amounts of chitosan and cellulose were used, and the Ostwald method was used to measure the viscosity. As expected, adding more chitosan (20 grams) made the viscosity much better compared to mixes with cellulose. This led to a viscosity of 658.20 cP, while a 15:5 chitosan-to-cellulose ratio made the viscosity the lowest, at 513.06 cP. FTIR analyses confirmed the structural integrity of chitosan post-synthesis. Challenges in optimizing chitosan production, particularly in achieving standard deacetylation levels, were noted as potential limitations. The results suggest that using biopolymers like chitosan and cellulose together is a long-term way to improve oil recovery and reuse, lower waste, and make industrial uses better. In the future, researchers should concentrate on enhancing the manufacturing process of chitosan to enhance its adsorption capabilities, and explore alternative functional modifications that could enhance its utility in a wider range of scenarios
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.
Cooling Load Capacity Analysis in The Departure Apron Corridor Area at Supadio Airport Using the Cooling Load Temperature Difference Method (CLTD) Mury Rahadi; Doddy Irawan; Eko Julianto
International Journal of Mechanical, Electrical and Civil Engineering Vol. 2 No. 3 (2025): July: International Journal of Mechanical, Electrical and Civil Engineering.
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmecie.v2i3.313

Abstract

This study presents an evaluation of the cooling load capacity in the departure apron corridor area at Supadio International Airport using the Cooling Load Temperature Difference (CLTD) method. The objective of the research is to assess whether the current air conditioning (AC) is adequate to meet thermal comfort requirements in a tropical climate characterized by high humidity and strong solar radiation. A detailed field survey was conducted at Gate 3, a glass-dominated corridor that experiences significant heat gain from solar exposure. Empirical data including temperature profiles, material properties, occupancy levels, and equipment specifications were collected over a two-week period using digital instruments. Using the CLTD method, the heat contributions from walls, roof, glass surfaces, occupants, lighting, and air infiltration were quantified. The results revealed that the installed AC (2 PK) only delivers about  of the required cooling load, with the total load estimated at 66,448 BTU/hr. The dominant sources of thermal gain include the roof and east-facing glass panels. The study recommends AC resizing, glass shading implementation, and improved insulation to enhance energy efficiency. This research contributes practical insights for HVAC optimization in airport infrastructure within hot-humid climates.
Co-Authors Alfian, Rudi 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 Fasya, Muhammad Firmansyah, Arfin Fuadzen Fuadzen Fuazen Fuazen Govari, Muhammad Khoirul Gunarto Gunarto Gunarto Gunarto Gunarto Iwan, Muhammad Kadeni Mulhardi Bowo Linda Suwarni Miftahuljannah Miftahuljannah MULYADI Mursalin . Mury Rahadi Nasution, Ahmad Yunus Neni Triana Rahardian, Bagus Ramadhan, Rahmad Ripandu Sasmeidy Selviana Solehudin An Nur Suje'i Suje'i Sukardi Sukardi Tuti Kurniati Waspodo Waspodo Waspodo, Waspodo