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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 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.
Co-Authors Achmad Maulana Risky Ahmat Herman Akhmad Farid Alvin Dio Nugroho Andy Hardianto Andy Hardianto Andy Hardianto Andy Hardianto Arie Restu Wardhani Arief Rizki Fadhillah Arif Rizki Fadhillah 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 Muhammad Ghazali Arrahim 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