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All Journal JMPM (Jurnal Material dan Proses Manufaktur) Budimas : Jurnal Pengabdian Masyarakat
Muhammad Nadjib
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Religion Humanities Economics, Econometrics & Finance Engineering Mechanical Engineering Social Sciences Other

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Penentuan Nilai Kalor Eksperimental LPG dengan Variasi Udara Berlebih dan Variasi Debit LPG 0,4; 0,5; dan 0,6 LPM Tito Hadji Agung Santosa; Muhammad Nadjib; Hardhany Faiz Ikhsan; Tayuh Kinayung Waskitho; Fiqri Elpa Ramadhany
JMPM (Jurnal Material dan Proses Manufaktur) Vol 6, No 1 (2022): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v6i1.15728

Abstract

Setiap bahan bakar memiliki nilai kalor (NK) yaitu energi yang dikandung dalam setiap massa dari bahan bakar. Penentuan nilai kalor bahan bakar gas dapat dilakukan dengan kalorimeter aliran. Penelitian ini menggunakan LPG sebagai bahan penelitian. Untuk menjamin semua bahan bakar terbakar, digunakan udara berlebih (excess air). Tujuan dari penelitian ini yaitu untuk mendapatkan NK eksperimental LPG dan efisiensi kalorimeter aliran dengan variasi udara berlebih (excess air). Penelitian ini menggunakan metode pembakaran aktual dengan debit LPG 0,4; 0,5; dan 0,6 LPM dan tujuh variasi excess air (EA) 0% hingga 60% dengan interval variasi 10%. Dari hasil perhitungan didapatkan NK eksperimental dan efisiensi kalorimeter aliran yang mendekati NK LPG teoritik yaitu pada EA 50% sebesar 41.042,16 kJ/kg dan 85%. Namun pada variasi EA 60%, NK eksperimental dan efisiensi mengalami penurunan nilai yaitu 38.142,44 kJ/kg dan 78,66%. Dapat disimpulkan bahwa NK eksperimental LPG naik seiring dengan naiknya udara berlebih hingga 50% dan selanjutnya turun pada udara berlebih 60% karena penambahan udara berlebih selanjutnya akan bersifat sebagai pendinginan. Each fuel has a heating value (HV) which is the energy contained in each mass of the fuel. Determination of the heating value of gas fuel can be done with a flow calorimeter. This research uses LPG as research material. To ensure that all fuel is burned, excess air is used. The purpose of this study was to obtain experimental LPG heating value and flow calorimeter efficiency with excess air variations. This study uses the actual combustion method with an LPG discharge of 0.4; 0.5; and 0.6 LPM and seven variations of excess air (EA) from 0% to 60% with a variation interval of 10%. From the calculation results obtained experimental HV and flow calorimeter efficiency close to theoretical LPG HV, namely at 50% EA of 41,042.16 kJ/kg and 85%. However, at 60% EA variation, experimental HV and efficiency decreased in value, namely 38,142.44 kJ/kg and 78.66%, respectively. It can be concluded that the experimental HV of LPG increases with the increase in excess air by up to 50% and then decreases at 60% excess air because the addition of excess air will act as cooling.
Effect of Density and Viscosity on Injection Characteristic of Jatropha - waste Cooking Oil Biodiesel Mixture. Mariono Mariono; Wahyudi Wahyudi; Muhammad Nadjib
JMPM (Jurnal Material dan Proses Manufaktur) Vol 7, No 1 (2023): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i1.17896

Abstract

Biodiesel has an important role in the world of transportation and its existence is taken into account. So the availability of biodiesel fuel in the future will be difficult to eliminate and must continue to be fulfilled. Therefore, it is necessary to innovate to increase the availability of biodiesel fuel. Biodiesel can be made from biological materials and includes renewable energy as a substitute for diesel oil. The production of biodiesel in this study jatropha and waste cooking oil as raw materials. This study aims to determine the effect of density and viscosity on the injection characteristics of jatropha-waste cooking oil biodiesel mixtures (1:4 and 4:1) on various B5-B40 fuels. Production of biodiesel from jatropha and waste cooking oil through degumming, esterification and transesterification processes. The results showed that the jatropha-waste cooking oil biodiesel mixed with 1:4 level B15 and 4:1 mixed with B10 level complied with SNI 7182-2015 biodiesel standards. The higher the density and viscosity values of jatropha-waste cooking oil biodiesel, the narrower the spray angle and the longer the spray penetration
PENERAPAN TEKNOLOGI FOTOVOLTAIK UNTUK PENERANGAN LINGKUNGAN DI SEKOLAH MENENGAH KEJURUAN MUHAMMADIYAH 2 TURI KABUPATEN SLEMAN Muhammad Nadjib; Fitroh Anugrah Kusuma Yudha; Aditya Kurniawan
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol. 7 No. 3 (2025): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v7i3.18620

Abstract

Muhammadiyah 2 Vocational High School in Turi, Sleman, Daerah Istimewa Yogyakarta, demonstrates a strong commitment to renewable energy, as shown by the presence of photovoltaic installations. However, these installations are still limited to supplying electricity for computer laboratories. The school frequently experiences power outages, particularly at night. To enhance safety and comfort during these periods, the school requires outdoor lighting that remains operational even when the PLN grid is down. This paper aims to apply photovoltaic technology to provide lighting for the school’s outdoor environment. The activities undertaken include designing and installing a photovoltaic system for the school terrace. The estimated daily load is determined based on the requirement of three LED lamps, each rated at 10 W. The system design consists of a solar module, a battery, and a charge controller. The final design specifies a 60 Wp solar module, a 70 Ah battery, and a controller with an 8 A input current. The solar module is installed on the tiled roof, while the battery, controller, timer, and panel box are placed indoors. The lamps are installed on the school terrace. The photovoltaic system operates effectively, providing illumination for four hours every night.
Co-Authors ADITYA KURNIAWAN Fiqri Elpa Ramadhany Fitroh Anugrah Kusuma Yudha Hardhany Faiz Ikhsan Mariono Mariono Tayuh Kinayung Waskitho Tito Hadji Agung Santosa Wahyudi Wahyudi