Article Per Year (5 Year)
p-Index From 2021 - 2026
3.595
P-Index
This Author published in this journals
All Journal Transmisi: Jurnal Ilmiah Teknik Elektro Rotasi Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA JURNAL TEKNIK MESIN Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Waste Technology Dinamisia: Jurnal Pengabdian Kepada Masyarakat JURNAL CRANKSHAFT Infotekmesin Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Automotive Experiences Blend Sains Jurnal Teknik
Eflita Yohana
Department Of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 70 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 70 Documents
Search

 3   4   5   6   7 
Produksi Biofuel Berbahan Baku Mangrove Untuk Substitusi Bahan Bakar Gasoline Syarifudin Syarifudin; Eflita Yohana; Muchammad; Suhartana; Kusnadi; Faqih Fatkhurrozak; Firman Lukman Sanjaya
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2318

Abstract

Dependence on fossil fuels requires a solution through alternative fuels. Ethanol is the recommended solution because it is easy to produce using raw materials that are abundant in nature, such as mangrove fruit. The Rhizophora Mucronata type of mangrove fruit contains 45.22% carbohydrates and is not used as raw material for human food. The research aims to produce ethanol biofuel from mangrove raw materials using multistage distillation. Experimental methods were applied at the stages of mangrove flour production, mangrove flour property testing, saccharification and fermentation, mangrove ethanol distillation, and analysis of potential performance and exhaust emissions. The research produced mangrove biofuel with an alcohol content of 28% which was produced from mangrove flour and had an ash content of 1.91%, protein, 2.24%, fat 0.53%, and water 11.61%. In addition, mangrove biofuel has higher viscosity and density properties than Gasoline at 0.8067Cp and 0.8115 g per mL respectively. The use of mangrove biofuel as a result of experiments is predicted to reduce fuel injection performance.
Kaji Eksperimen Pengaruh Jumlah Blade Impeller dan Laju Aliran Massa Fluida terhadap Kavitasi Pompa Sentrifugal Mesin TCU Casting Safi'i, Muhamad; Sinaga, Nazaruddin; Yohana, Eflita; Nugroho, Agung
JURNAL CRANKSHAFT Vol 8, No 2 (2025): Jurnal Crankshaft Vol. 8 No. 2 (2025)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v8i2.14572

Abstract

Kavitasi menjadi masalah utama pada pompa sentrifugal karena mempengaruhi kinerja dan efisiensinya. Studi eksperimental pengaruh jumlah blade impeller dan laju aliran massa fluida terhadap kavitasi pada pompa sentrifugal diselidiki dan dikarakterisasi untuk mengetahui fenomena dan karakteristik kavitasi. Pompa sentrifugal Merk Ebara tipe 65x50 FSS4JA yang terpasang pada instalasi TCU Mesin Casting dengan jumlah blade 4 pcs dan 6 pcs dengan sudut kemiringan konstan 60º digunakan sebagai objek penelitian. Variasi laju aliran massa fluida ditentukan dengan nilai 1,67 kg/s, 3,33 kg/s, 5,67 kg/s, dan 5,67 kg/s. 7,33kg/s. Hasil penelitian menunjukkan nilai kavitasi tertinggi diperoleh pada pompa sentrifugal dengan variasi jumlah blade 4 pcs dengan nilai NPSH 2,02 pada variasi laju aliran massa fluida sebesar 5,67 kg/s, sedangkan yang terendah terjadi pada pompa sentrifugal dengan variasi jumlah blade 6 pcs dengan nilai NPSH 1,88. Pada variasi laju aliran massa fluida sebesar 7,33 kg/s. Pompa sentrifugal dengan jumlah blade 6 pcs yang bekerja pada laju aliran massa fluida sebesar 7,33 kg/s menjadi hasil optimum dalam riset ini dan memungkinkan dapat diterapkan secara praktis di lapangan. Kata kunci:  Impeller, Kavitasi, Pompa, Sentrifugal.
Karakteristik Emisi CO dan HC Mesin bensin SOHC 110cc Berbahan bakar Pertalite-Alkohol Syarifudin; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Yohana, Eflita; Syaiful
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1067

Abstract

Community economic activities that encourage motorized vehicles are getting higher. This exacerbates dependence on fossil fuels and air pollution. The outside air that is contaminated with exhaust gases from combustion products is very dangerous for human health. Motorized vehicles such as motorcycles are the largest cause of air pollution. Alcohols have high octane number and low viscosity. The use of ethanol and methanol alcohols is very diverse, so they are easy to obtain. Therefore, alcohol ethanol and methanol are suitable as premium fossil fuel mixtures. This study aims to observe the CO and HC emission characteristics of the gasoline engine using a premium-alcohol mixture of ethanol, methanol. The alcohol concentration was varied from 5% to 15% at 5% intervals. The petrol engine is operated at 2000, 3000, and 4000rpm. Commercial Gas Analyzers are used to measure CO and HC emissions coming out of the exhaust. The results of the observations present the CO and HC emissions of the engine with premium-ethanol fuel, methanol is lower than pure premium (P100). CO emissions from PE15 fuel decreased to 66,30%, and PM15 decreased to 90,63%. Meanwhile, PE15 fuel HC emissions decreased by 58,94%, and PM15 decreased by 68,60%.
Korelasi Konsentrasi Etanol 5% Pada Bahan Bakar Gasolin Terhadap Performa, dan Emisi Gas Buang Mesin Bensin 150cc Syarifudin, Syarifudin; Yohana, Eflita; Muchammad, Muchammad; Suhartana, Suhartana; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Qurohman, M. Taufik
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1737

Abstract

Ethanol has higher octane and oxygen properties than fossil-fuel gasoline. Along with the increase in gasoline dependency and exhaust emissions, the use of ethanol as a fuel is urgently studied. This study aimed to observe the concentration of 5% ethanol in gasoline on the performance and exhaust emissions of a 150cc gasoline engine that was operated at 1000, 2000, and 3000rpm. The observation results show that the concentration of 5% ethanol in gasoline correlates with an increase in performance with indications of an increase in EGT, Brake power, BTE, and a decrease in SFC. On the emission side, it is also correlated with an increase in the quality of exhaust emissions with indications of increased CO2 emissions and reduced CO and HC emissions. The best correlation of 5% ethanol concentration was obtained at an operating speed of 2000rpm with an increase in EGT of 10.70%, an increase in Brake power of 9.49%, an increase in BTE of 38.62%, an increase in CO2 emissions of 23.06%, a decrease in SFC of 26 .49%, CO emission reduction of 16.67%, and HC emission reduction of 4.24%.
Perancangan Skema Dual Port Injection Sistem Electric Control Unit Motor Spark Ignition Syarifudin; Kusnadi; Yohana, Eflita; Suhartana; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2157

Abstract

Blending fuels is an urgent alternative to reduce dependence on gasoline. Blending gasoline-alcohol bioethanol is realistic due to its high octane number properties and the abundant availability of raw materials. However, high viscosity results in inconsistent fuel mixing homogenization and decreased injector performance. The research aims to design a Dual Port Injection scheme as a dummy simulation of fuel blending so that bioethanol alcohol can be homogeneously blended with gasoline in the combustion chamber. The method used is observation of the Electric Fuel Injection working system and designing a Dual Port Injection Scheme. The research resulted in a Dual Port Injection scheme with the concept of doubling the injection-based fuel system and commands from the commercial Electric Control Unit to be forwarded to the bioethanol and bioethanol fuel pumps to supply fuel to the high pressure pipe.
Produksi Biofuel Berbahan Baku Mangrove Untuk Substitusi Bahan Bakar Gasoline Syarifudin, Syarifudin; Yohana, Eflita; , Muchammad; , Suhartana; Kusnadi; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2318

Abstract

Dependence on fossil fuels requires a solution through alternative fuels. Ethanol is the recommended solution because it is easy to produce using raw materials that are abundant in nature, such as mangrove fruit. The Rhizophora Mucronata type of mangrove fruit contains 45.22% carbohydrates and is not used as raw material for human food. The research aims to produce ethanol biofuel from mangrove raw materials using multistage distillation. Experimental methods were applied at the stages of mangrove flour production, mangrove flour property testing, saccharification and fermentation, mangrove ethanol distillation, and analysis of potential performance and exhaust emissions. The research produced mangrove biofuel with an alcohol content of 28% which was produced from mangrove flour and had an ash content of 1.91%, protein, 2.24%, fat 0.53%, and water 11.61%. In addition, mangrove biofuel has higher viscosity and density properties than Gasoline at 0.8067Cp and 0.8115 g per mL respectively. The use of mangrove biofuel as a result of experiments is predicted to reduce fuel injection performance.
Chemical composition and antibacterial activity of coconut-shell liquid smoke to maintain the texture of fresh meat Purwantisari, Susiana; Jannah, Siti Nur; Fikri, Dzakiyya Nabilla; Wulandari, Sukma Aulia; Yohana, Eflita; Setiyana, Budi; Ardiansari, Anindya; Amal, Daffa Ikhlasul; Ariyanto, Hermawan Dwi
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 7, No 2 (2024)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2024.007.02.8

Abstract

This research focused on the evaluation of raw broiler chicken meat texture and pathogenic antibacterial effect under the treatment of grade 2 coconut-shell liquid smoke (CSLS) as a food preservative. Compound identification of grade 2 CSLS was conducted using the GC-MS method. The main chemical compounds of CSLS were polyunsaturated fatty acid derivates, fatty acid and phenol. The evaluation of texture was conducted on raw broiler chicken meat under the treatment of grade 2 CSLS during storage at 25 ℃ for 7 days. The effect of antibacterial activity of grade 2 CSLS with different concentration (i.e., 5%, 25%, 50%, and 75%) were tested using Gram-positive bacteria on several pathogenic bacteria such as L. monocytogenes, S. aureus, P. Aeruginosa, and E. coli. The results indicated that grade 2 CSLS influenced the inhibited zone of L. monocytogenes, S. aureus, P. Aeruginosa, and E. coli respectively with linear correlation. The optimal concentration of grade 2 CSLS resulted in a concentration of 50%, which was the most optimal against L. monocytogenes, S. aureus, P. Aeruginosa, and E. coli as pathogenic bacteria strains.
Workshop Measuring Training to improve the Basic Engineering Competence of LPK. Bintang Manufaktur Tegal Indonesia students: Diklat Measuring untuk meningkatkan Kompetensi Basic Engineering Siswa LPK. Bintang Manufaktur Tegal Indonesia Syarifudin, Syarifudin; Fatkhurrozak, Faqih; Sanjaya, Firman Lukman; Hendrawan, Andre Budhi; Zidni, Hepatika; Yohana, Eflita; Saptaryani, Titiek Deasy
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 9 No. 3 (2025): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v9i3.14257

Abstract

Vocational High School (SMK) graduates are the biggest contributor to the unemployment rate. The Tegal Indonesia Bintang Manufaktur Job Training Institute helps increase the knowledge and skills of participants who incidentally are class XII SMK. Class XII who graduate in 2023 will certainly have low knowledge and competence because of the learning method used online (Covid-19 pandemic policy). The community service program (PKM) aims to strengthen basic competence, especially measuring. The method used is Training which is held for three days (20-22 March 2023). The results of PKM presented increase in measuring competency of 95.38% from 32 participants. Through the free test conducted at the beginning and the Post test at the end of the activity, measuring competence has been optimal as reflected in the practical implementation of Quality control
Kaji Eksperimen Pengaruh Konsumsi Bahan Bakar Kayu dan Biopelet pada Kompor Bio Massa terhadap Efisiensi Pembakaran Suheri, Suheri; Umar, Hamdani; Turnip , Darlis; Safi’i, Muhamad; Sinaga, Nazaruddin; Yohana, Eflita; Setyoadi, Yuris
Blend Sains Jurnal Teknik Vol. 4 No. 3 (2026): Edisi Januari
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/blendsains.v4i3.1508

Abstract

Pertumbuhan ekonomi dan populasi di Indonesia meningkat sangat pesat, sehingga memungkinkan adanya peningkatan konsumsi energi dan bahan bakar. Peningkatan konsumsi energi dan bahan bakar, terutama bahan bakar fosil untuk aktivitas masyarakat yang tidak terkontrol akan memberikan dampak negatif, sehingga penggunaan energi biomassa menjadi perhatian utama untuk transisi dan kemandirian energi. Penelitian pada bidang bahan bakar berbasis biomassa berupa biopelet yang terbuat dari campuran serbuk geraji dan dedak padi yang dibakar pada kompor biomassa dengan dimensi 520 x 250 x 190 mm dijadikan objek penelitian. Variasi aliran udara yang terkontrol dan di variasikan sebesar 3 m/s, 6 m/s, dan 9 m/s dengan bantuan blower dan variasi waktu pembakaran yang dikembangkan sebesar 60 detik, 120 detik, 180, 240 detik, 300 detik, 360 detik, 420 detik, 480 detik, 540 detik, dan 600 detik dikarakterisasi guna mengetahui efisiensi pembakaran dan efisiensi termal dengan pendekatan eksperimen. Hasil uji menunjukkan bahwa variasi kecepatan udara sebesar 9 m/s memiliki nilai efisiensi termal tertinggi dengan nilai 46,349% dengan bahan bakar biopelet dan 41,381% dengan bahan bakar kayu pada variasi waktu pembakaran sebesar 600 detik. Hasil penelitian ini diharapkan dapat digunakan untuk pedoman perancangan kompor biomassa yang efektif dan efisien, serta dapat di aplikasikan secara praktis di lapangan. Selain itu, variasi kecepatan udara sebesar 9 m/s dan waktu pembakaran 600 detik menjadikanya parameter penting untuk di rekomendasikan sebagai pengaturan ideal dalam pengoperasian
Performance and Emission Characteristics of an Engine Fueled with Mangrove Bioethanol”“Gasoline Blends Syarifudin Syarifudin; Eflita Yohana; Muchammad Muchammad; Suhartana Suhartana
Automotive Experiences Vol. 8 No. 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13121

Abstract

Alternative fuels are a primary solution to address fuel scarcity and the adverse effects of fossil fuels, such as air pollution. Bioethanol is notable for its simple production process and the use of flexible raw materials, although it is often derived from crops used in food production. Mangrove bioethanol, however, is produced from Rhizophora mucronata mangrove fruit, which is abundant, rich in carbohydrates, and not part of the human food chain. This study aimed to evaluate the use of mangrove bioethanol as a biofuel on engine performance and emission reduction in gasoline engines. Laboratory-based experiments were conducted using mangrove bioethanol blends at concentrations of 5% (GE5) and 10% (GE10). Pure gasoline (G100) served as the baseline for comparison. The results showed that GE10 delivered better engine performance and lower emissions than both G100 and GE5, likely due to its high octane rating and oxygen content. Performance improvements with GE10 included increases of 7.89% in brake torque (BT) and brake power (BP), 47.55% in brake thermal efficiency (BTE), and 20.33% in exhaust gas temperature (EGT), along with a 98% reduction in brake specific fuel consumption (BSFC). In terms of emissions, GE10 led to reductions in carbon monoxide (CO) and hydrocarbon (HC) emissions by 43.56% and 36.54%, respectively, while carbon dioxide (COâ‚‚) emissions increased by 59.42%.
Co-Authors , Muchammad , Suhartana Abdul Ghani K Abdulhafiz Younis Mokhetar Abrorul Fuady R. Achmad Afinadi Adi Kurnia Muktabar Adi Kurnia Muktabar Ady Priambodo Agus Wibowo Akhmad Zidni Hudaya Amal, Daffa Ikhlasul Ambangan Siregar Ambangan Siregar Ambangan Siregar Ambari, Iqbal Anindya Ardiansari Ari Nugroho Arijanto Arijanto arrohman, sigit Askhabulyamin Askhabulyamin Astrid Ayutasari Ayudya Izzati Dyah Lantasi Bachtiar Kurnia Prakoso Bambang Yunianto Bambang Yunianto Berkah Fajar TK Bisri Oktavia Usda Bondantio Putro Budi Setiyana Citra Asti Rosalia Diana, Ade Eva Didik Ariwibowo Didik Ariwibowo Dwi Basuki Wibowo Fadel Iqbal Muhammad Fahmi Arifan Faqih Fatkhurrozak Faqih Fatkhurrozak Fardzanela S Fardzanela S Farizki, Bangkit Fatih Khamdani Fatkhurrozak, Faqih Fikri, Dzakiyya Nabilla Firman Lukman Sanjaya Firman Lukman Sanjaya Franklin T.H. Sinaga Ganang Wisma Habib Indra Karim Hamdani Umar Hendrawan, Andre Budhi Henry Carles Henry Charles Hepatika Zidny Ilmadina Hermawan Dwi Ariyanto Herriza, Rigo Muhammad Idreis Abdualgader Indah Hartati Ismoyo Haryanto Joga Dharma Setiawan Julianto, Mohamad Endy Khoiriyah, Mauli Astuti Kooshartoyo, Meddy Kusnadi Kusnadi Kwang Hwan Choi Lukman Sanjaya, Firman M. Fandiar Majiid, M. Fandiar M. Taufik Qurohman M.S.K. Tony Suryo Utomo M.S.K. Tony Suryo Utomo Mahmudyan Nuriil Fahmi Maula, Setya Deni Maulana, Andre Fiky Mochamad Arief Budihardjo Mochammad Facta Mohamad Endy Y Yulianto Mohammad Tauviqirrahman Mohammad Tauviqirrahman MSK Tony Suryo MSK. Tony SU. MSK. Tony Suryo Utomo Muchammad Muchammad Muchammad Muchammad Muchammad Muchammad Muchammad Natasya Ghinna Humaira Nazaruddin Sinaga Novi Laura Indrayani, Novi Laura Nugroho, Agung Nurminda Eka Indra Pramana Pane, Ivranza Zuhdi Permana, Randa Putro Adi Nugroho Qurohman, M. Taufik Rahmanu, Zakaria Rahmat Julyansyah, Rahmat Ramadan, Bimastyaji Surya Ratrya Putra Hunadika Rayhan Halim Rey Adam Riana Sitawati Riky Ardiyanto Rizka Amalia Romadhon, Revki Safi'i, Muhamad Sanjaya, Firman Lukman Saptaryani, Titiek Deasy Saputra, Imron Aryadi Siti Nur Jannah Sri Nugroho Sri Utami H Sudargana Sudargana Sugeng Wahono Sugiyanto Sugiyanto Sugiyanto Suhartana Suhartana Suhartana Suhartana Suhartana Suheri Sukis, Muhamad Susetio Pratama Susiana Purwantisari Sutrisno Sutrisno Syafrudin Syafrudin Syaiful Syaiful . Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Syarifudin Tommy Ivantoro Tony Suryo Utomo Tony Suryo Utomo Turnip , Darlis Vita Paramitha Wahyuningsih Wahyuningsih Wulandari, Sukma Aulia Yohanes Aditya W Yohanes Aditya Wisnu A Yohanes Aditya Wisnu A. Yuris Setyoadi Zaman, M. Badruz