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All Journal WIDYA TEKNIKA Turbo : Jurnal Program Studi Teknik Mesin Conference on Innovation and Application of Science and Technology (CIASTECH) JOURNAL OF SCIENCE AND APPLIED ENGINEERING JAST : Jurnal Aplikasi Sains dan Teknologi J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Infotekmesin Jurnal Aplikasi Dan Inovasi Ipteks SOLIDITAS Jurnal Energi dan Teknologi Manufaktur Scientific Journal of Mechanical Engineering Kinematika JURNAL FLYWHEEL V-MAC (Virtual of Mechanical Engineering Article) Journal mechanical and manufacture technology (JMMT) Prosidia Widya Saintek JASTEN (Jurnal Aplikasi Sains Teknologi Nasional
Dadang Hermawan
Fakultas Teknik, Universitas Widyagama, Malang
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Effect of Internal Reflectors on Daily Performance of Double Slope Solar Stills with Porous Fin Absorber Plate Nova Risdiyanto Ismail; Purbo Suwandono; Dadang Hermawan; Akhmad Farid; Frida Dwi Anggraeni
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5981

Abstract

The potential of energy and sea water in Indonesia is relatively high, but it has not been utilized massively to reduce the shortage of fresh water on the islands. Utilization of this potential can use solar stills. Solar still is a relatively cheap technology, easy to obtain materials, environmentally friendly and easy to construct, but this technology has shortcomings in its low productivity. Efforts to increase productivity have been made by many researchers, but there has not been a study of internal reflector integration in a double slope solar still using a porous absorbent plate tested for 23 hours. This study aims to examine the effect of adding an internal reflector on the performance of a double slope solar still. The performance of the double slope solar still is identified by evaluating freshwater productivity and efficiency. This research was conducted experimentally comparing with and without internal reflector. The addition of internal reflectors varies in placement, as for the placement on the north and south sides (RUS), the south side (RS), and the north side (RU). Data collection starts at 07.00 p.m. until 06.00 a.m the next day and is carried out for 5 days. Research comparing the performance of RUS, RS, RU compared to TR and concluded that there is an increase in temperature of fins, seawater and cover glass when using the addition of internal reflector. The increase in temperature has an effect on daily productivity for RUS, RS and RU between 12.88-16.13%, 8.71-12.56%, and 1.70-2.88%, respectively. In addition, the addition of the internal reflector has a positive effect on increasing the daily efficiency for RUS, RS and RU between 12.69-15.93%, 8.60-12.46% and 1.65-2.82%, respectively.
Pengaruh Penambahan Media Pendingin Nitrogen Pada Dinding untuk Menigkatkan Kinerja Solar Still Double Slope (Energi Dan Eksergi) Dadang, Dadang Hermawan; R. Ismail, Nova; Suwandono, Purbo; Dwi Anggraeni, Frida
JURNAL FLYWHEEL Vol 14 No 2 (2023): Jurnal Flywheel
Publisher : Teknik Mesin S1 ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/flywheel.v14i2.7318

Abstract

Masyarakat di daerah kepulauan dan pesisir pantai sering mengalami kekurangan air, terutama musim kemarau. Pada daerah dimana masyarakat tinggal tersebut terdapat sumber energi dan air laut yang melimpah, terlebih pada musim kemarau. Pada kondisi ini sangat tepat menggunakan solar still untuk mengolah air laut menjadi air tawar menggunakan energi matahari. Penelitian ini bertujuan untuk membandingkan solar still double slope menggunakan pendingin nitrogen pada dinding (SSDS.WCN) dan tanpa pendingin SSDS. Penelitian dilakukan secara eksperimen, teoritis dan kajian eksergi. Solar still menggunakan pelat penyerap sirip berpori, kaca penutup double slope dan pendingin nitrogen pada dinding sebelah utara dan selatan yang di bandingkan dengan tanpa pendingin. Nitrogen pada sisi utara dan selatan menggunakan metode pembilasan (Flushing). Penelitian menghasilkan produktivitas air kondensat menggunakan pendingin nitrogen pada dinding (SSDS.WCN) secara eksperimen rata-rata sebesar 2.28 kg/10jam.m2 dan teoritis sebesar 2.15 kg/10jam.m2 lebih tinggi di bandingkan dengan tanpa pendingin (SSDS) secara eksperimen sebesar 1.98 kg/10jam.m2 dan teoritis sebesar 2.07 kg/10jam.m2. Efisiensi solar still menggunakan pendingin nitrogen pada dinding (SSDS.WCN) secara eksperimen rata-rata sebesar 37.05% dan teoritis sebesar 38.87% lebih tinggi di bandingkan dengan tanpa pendingin (SSDS) secara eksperimen sebesar 34.02% dan teoritis sebesar 35.27%. Efisiensi eksergi rata-rata menggunakan SSDS.WCN sebesar 4.78% dibandingkan dengan SSDS sebesar 4.49%. Solar still menggunakan pendingin nitrogen pada dinding dapat meningkatkan produktivitas air kondensat, efisiesnsi solar still dan efisiesnsi eksergi di bandingkan dengan tanpa pendingin.
Analisa Tensile Strength Komposit Serat Kulit Pohon Waru dengan Kombinasi Serat Karbon Kevlar Sebagai Material Reinforcement Handry Stefan Enus; Gatot Soebiyakto; Arief Rizki Fadhillah; Dadang Hermawan
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1888

Abstract

In increasing the tensile strength of the waru tree bark fiber composite (Hibiscus tiliaceus), it is necessary to have a combination of reinforcement used in the composite material. One of the reinforcement materials that can be combined is carbon fiber kevlar. Kevlar carbon fiber has several advantages, including low density, absorbing vibrations well, and it is resistant to chemical solutions. The specific objectives of this study were to determine the maximum strain stress, modulus of elasticity, and fracture analysis of hibiscus bark fiber composites with a combination of kevlar carbon fiber as a reinforcement material. The independent variable in the study was comparing the composite with the different reinforcement materials used, including 100% hibiscus (Hibiscus tiliaceus) bark fiber, 100% kevlar carbon fiber, 50% combination fiber of hibiscus (Hibiscus tiliaceus) bark, and 50% kevlar carbon. The process of making composites uses the vacuum infusion resin method with specimens referring to the ASTM D638-03 type I standard. The results of this study are that combining kevlar carbon fiber as a reinforcement material can improve the mechanical properties in terms of the tensile strength of the hibiscus tree bark fiber composite.
IDENTIFIKASI PENAMBAHAN SERBUK TEMBAGA PADA PELAT PENYERAP MORTAR UNTUK MENINGKATKAN KINERJA SOLAR WATER HEATER Achmad Burhanudin; Nova Risdiyanto Ismail; Dadang Hermawan; Akhmad Farid
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 1 (2025): SJME Kinematika Juni 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i1.690

Abstract

Indonesia has a high potential for solar energy, yet it is not optimally utilized. Additionally, the demand for hot water in Malang City is considerable. To meet this need, solar water heaters (SWH) can harness solar energy. However, one issue with SWH is that the mortar absorber plate has low thermal conductivity. This can be improved by adding copper powder to the mortar absorber plate. This study aims to identify the effects of adding copper powder to the absorber plate to enhance the performance of the solar water heater. The research compares mortar absorber plates with and without copper powder. Testing is conducted with varying flow rates. The study employs experimental methods, utilizing microscopic imaging, thermal conductivity tests, and SWH performance assessments. Microscopic analysis revealed that copper powder mixed with cement enhances the mortar. The addition of copper powder to the absorber plate (SWH.T) increases thermal conductivity by 25.16% compared to the standard version (SWH.S). Efficiency improvements for SWH.T over SWH.S at flow rates of 50, 150, and 250 ml/min are 24.20%, 9.91%, and 11.79%, respectively, with the highest efficiency for SWH.T at 250 ml/min reaching 45.56%.
PENGARUH JUMLAH SUDU TERHADAP UNJUK KERJA 3D PRINT TURBIN AIR TIPE VORTEX Alvin Dio Nugroho; Purbo Suwandono; Dadang Hermawan; Arief Rizki Fadhillah
TURBO [Tulisan Riset Berbasis Online] Vol 11 No 1 (2022): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.1935

Abstract

The potential of natural resources in the form of water energy is a renewable natural resource that is often used because it does not damage the environment and can be used continuously. This water flow has two types, namely laminar flow and turbulent flow, the forces generated from these two flows are also different. Turbulent flow tends to produce a greater force and can lift object masses better than laminar flow. Therefore, a vortex turbine has emerged which utilizes turbulent flow as a waterwheel drive, by directing laminar flow towards the cross section and converting it into turbulent flow by utilizing the force of gravity and The cross-sectional shape forms a whirlpool that can move a waterwheel and turn a turbine. The number of blades is very influential on the performance generated from the vortex turbine and affects the resulting output, be it voltage, current, rotational speed, torque and efficiency. In this study, the best results were shown on blades with a total of 6, at a rotational speed of 141.3 rpm; at the voltage shows the result of 0.28 volts; at current it produces 44 mA; at Torque (Nm) 0.22 Nm; and the efficiency is 76.5%.
Pemanfaatan dinding sebagai permukaan kondensasi untuk meningkatkan kinerja solar still double slope Nova Risdiyanto Ismail; Purbo Suwandono; Dadang Hermawan; Frida Dwi Anggraeni
TURBO [Tulisan Riset Berbasis Online] Vol 12 No 1 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i1.2439

Abstract

Indonesia is an archipelagic country that often experiences drought, especially in the dry season. In the dry season, there is very abundant solar and seawater energy, so to overcome the problem, you can use solar still technology that utilizes solar energy to process seawater into condensate / fresh water economically. Various efforts are made to optimize the performance of solar stills, in this case the study aims to utilize the wall as a condensation surface to improve the performance of solar still double slope. The study was conducted experimentally by comparing: 1. Solar still double slope without utilizing the wall as a condensing surface, 2. Solar still double slope by utilizing the north side wall as a condensing surface, 3. Solar still double slope by utilizing the south side wall as a condensation surface, and 4. Solar still double slope by utilizing the north and south side walls as condensing surfaces. The results of the study using solar still double slope by utilizing the north wall as a condensing surface obtained the highest productivity of 1966 ml and the highest efficiency of 68.58%.
Co-Authors Achmad Burhanudin Achmad Maulana Risky Ahmat Herman Akhmad Farid Akhmad Farid Alvin Dio Nugroho Andy Hardianto Andy Hardianto Andy Hardianto Andy Hardianto Arie Restu Wardhani Arief Rizki Fadhillah Arif Rizki Fadhillah Arrahim, Muhammad Ghazali Bagus Wahyu Pratama Chiquitita Tiara Nisa Deky Framasta Deni Prasetio Dwi Anggraeni, Frida Febi Rahmadianto Frida Dwi Anggraeni Frida Dwi Anggraeni Gatot Soebaktiyo Gatot Soebiyakto Gatot Soebiyakto Handry Stefan Enus Hangga Wicaksono Leo Hutri Wicaksono Leo Hutri Wicaksono Mohammad Julio Akbar Muhammad Agus Sahbana Nasution, Annio Indah Lestari Nova Risdiyanto Ismail Nurida Finahari Purbo Suwandono Purnomowati, Wiwin R. Ismail, Nova Sang Saka Adi Pangestu Silviana Silviana Silviana Silviana Silviana Silviana Silviana Silviana Suriansyah Sabaruddin Sutrisno Sutrisno Suyatno, Agus Syahroni Wahyu Iriananda, Syahroni Wahyu