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Syarifudin Syarifudin
Jurusan PWK – UNDIP
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Pengaruh Penambahan methanol Terhadap Emisi Bahan Bakar Mesin Sepeda Motor Berbahan Bakar Pertamax 150 CC Fatkhurrozak, Faqih; Sanjaya, Firman Lukman; Syarifudin, Syarifudin; Hendrawan, Andre Budhi; Usman, M. Khumaidi; Gunawan, Gunawan
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.v14i2.1719

Abstract

Automotive vehicles have increased every year, especially motorcycles, which result in increased air pollution. The use of alternative fuel methanol is one of the solutions to control air pollution. methanol has a high oxygen content so it can improve emissions. This study aims to analyze the use of a mixture of Pertamax and methanol fuel on exhaust emissions using a 150 cc EFI gasoline engine. The percentage of methanol used in the test is 5%, 10%, and 15%. Variation of engine speed from 1000 to 3000 rpm with an interval of 1000 rpm. Measurement of exhaust emissions using a gas analyzer. The addition of methanol to Pertamax fuel reduced HC emission levels at PM15 by 34% at 3000 rpm and CO by 43% at 3000 rpm at PM15, while CO2 and O2 emission levels increased by 23% at 3000 rpm at CO2, mixing PM15 and at O2 emissions of 163% at a speed of 3000 rpm on PM5.
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%.
Analisis Perpindahan Gaya SideLoad Pegas Suspensi Tipe C Menggunakan Finite Element Method (FEM) Budi, Sigit Setijo; Lukman Sanjaya, Firman; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Ariyanto, Nur Aidi
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.v14i2.1783

Abstract

The suspension must provide comfort and safety to the vehicle. Therefore, it is necessary to analyze the load's effect on the pressure distribution on the axle so that the spring strength from the sideload force can be simulated. This study aims to analyze the sideload force of type C suspension springs using FEM. Spring variations are the number of different threaded coils, namely 11, 12, and 13. In the FEM simulation, the spring is given a load until 50mm, 100mm, 150mm, 200mm, and 250mm displacement occurs. The loading spreads to the X, Y, and Z axes. Each direction of the axis is measured by the pressure that occurs. The results showed that the pressure values that occur on the X, Y, and Z axes decreased with each increase in the number of screw coils. The lowest X-axis pressure reduction occurs in thread 12 at 63%. Meanwhile, the pressure on the Y axis decreased by 27% on the spring screw 12. The highest decrease in pressure on the Z axis occurred by 34% on the spring screw 12 compared to the spring screw 11.
Efek Pencampuran Butanol dan Diethyl Ether (DEE) Pada Pertalite Terhadap Torsi, Daya dan Brake Spesific Fuel Consumpsion Mesin Bensin 160cc Sanjaya, Firman Lukman; Usman, M. Khumaidi; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Hendrawan, Andre Budhi
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.v14i2.1906

Abstract

The increase in the volume of vehicles resulted in a crisis of fossil fuels so there is a need for alternative fuels to replace gasoline. Butanol and Diethyl Ether (DEE) are alternative fuels that can be added to gasoline. This is because the Octane Number and high O2 levels optimize combustion in the cylinder and increase torque and power and save fuel. This study compares the addition of butanol and DEE to gasoline on torque, power, and Brake Specific Fuel Consumption (BSFC). The study used a 160cc gasoline engine with a carburetor with engine speeds of 1000, 2000, and 3000 rpm. Variation of fuel mixture 5%, 10%, and 15% on gasoline. The results showed that the DEE15 mixture increased the highest torque by 28% at 3000 rpm compared to other fuel mixtures. Engine power also increases the highest by 28% when using a mixture of DEE15 compared to other fuels. Meanwhile, BSFC experienced the highest decrease of 19% when using the DEE15 mixture compared to other mixtures.
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.
Komparasi Efek Gasoline-Butanol dan Gasoline-Ethanol Terhadap Exhaust Gas Temperature dan Emissions Mesin EFI Sanjaya, Firman Lukman; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Usaman , M. Khumaidi; Wibowo, Agus
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.v15i2.2335

Abstract

The use of gasoline in vehicles produces CO, HC, and NOx emissions which are dangerous for the environment. Using butanol and ethanol as additional gasoline can reduce pollutant emissions. This is because alcohol has a high oxygen content and helps combustion more completely. This research compares the Exhaust Gas Temperature and Emissions results of EFI engines using gasoline-butanol and gasoline-ethanol. The EFI engine used has a capacity of 150CC. The alcohol used was butanol and ethanol with a percentage of 5%, 10%, and 15% in each test. The test results showed that the highest EGT reduction occurred in the E15 mixture at 23.98% and B15% at 8.65. Meanwhile, CO emissions experienced the highest reduction in E10 by 53.6% and B15 by 44.6%. HC emissions also experienced the highest reduction in E15 by 70.5% and B15 by 66.7% compared to gasoline. However, CO2 emissions increased to 17.07% in the E15 mixture and 11.46% in B15. This proves that the addition of ethanol produces more complete combustion than the addition of butanol.
Pengaruh Penambahan Methanol Terhadap Performa Mesin Injeksi 150 CC Berbahan Bakar Pertamax fatkhurrozak, faqih; Lukman Sanjaya, Firman; Syarifudin, Syarifudin; Nur Akhmadi, Amin; Budhi Hendrawan, Andre
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2395

Abstract

The use of fossil fuels causes air pollution in Indonesia. Biofuel is one of the alternatives often used, one of which is methanol. Methanol has efficient characteristics and low emissions, increases engine performance and thermal efficiency, and reduces fuel consumption. This study aims to observe the concentration of pertamax - methanol addition of 5%, 10%, and 15% on performance, BSFC, and BTE. The percentage of pertamax and methanol fuel mixing is 5%, 10%, and 15%, and the speed used is 1000, 2000, and 3000 rpm. The measurements taken are power, BSFC, and BTE using a dynotest and displayed on a screen. Adding 5%, 10%, and 15% methanol to pertamax increases engine performance. The addition of Pertamax-methanol PM15 increases power by 25% at a speed of 1000 rpm, reduces BSFC by 40% on PM15 at a speed of 2000 rpm, and increases thermal efficiency on PM5 by 73% at a speed of 2000 rpm
Uji Performa Engine Fuel Injection Berbahan Bakar Gasoline-Butanol dan Gasoline-Ethanol Sanjaya, Firman Lukman; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Usman , M. Khumaidi; Budhi Hendrawan, Andre
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2814

Abstract

The energy crisis is largely attributed to the extensive use of fossil fuels. Butanol and ethanol can be used as an alternative energy source because their characteristics are superior to those of gasoline, such as RON and oxygen content. This study aims to determine the effect of gasoline-butanol and gasoline-ethanol mixtures on engine performance so that they can be an option to replace fossil fuels. The percentage of alcohol (butanol and ethanol) in gasoline is 5%, 10%, and 15% with variations in engine speed of 1000, 2000, and 3000 rpm. This study uses a dynamometer as a tool to measure engine performance. Test results show that E15 can increase engine torque and power by up to 26%, while B15 increases by 19%. In addition, ethanol can reduce BSFC better than butanol. The BSFC value decreased by 17% in E15, while B15 decreased by 15% compared to pure gasoline. This is because ethanol's RON and oxygen content are higher, so torque and power increase while BSFC decreases. These results prove that gasoline-ethanol is better at improving engine performance than gasoline-butanol.
PENGEMBANGAN E-MODUL FLIPBOOK INTERAKTIF BERBASIS PROBLEM BASED LEARNING PADA KONSEP MOL Syarifudin, Syarifudin; Fadhilah, Raudhatul; Kurniasih, Dedeh
PENA KREATIF : JURNAL PENDIDIKAN Vol 14 No 1 (2025): Pena Kreatif : Jurnal Pendidikan
Publisher : FKIP UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/jpk.v14i1.7759

Abstract

The results of interviews show that students are less enthusiastic about learning chemistry in class due to uninteresting and boring methods, especially lectures in class which are outdated. With the ever-evolving technology, teachers have the opportunity to increase students' interest in learning through the development of more interesting and relevant learning methods. This study aims to create a valid and practical interactive electronic module based on problem-based learning of class X molecular concepts at SMAN 1 Salatiga. The development model applied in this study is the 3D model which is a modification of the 4D model recommended by Thiagarajan. The sample used in this study was class XC consisting of 35 students. Data collection methods through interviews and indirect communication using research instruments in the form of questionnaires. The results of the analysis showed that the PBL-based electronic interactive flipbook module developed met the validation criteria with an average value of 82.05%. In terms of practicality, responses from teachers and students showed an average value of 85.47%, with a very good assessment. Thus, the developed electronic module can be used as a feasible additional learning resource for grade X students and teachers who teach Chemistry subjects in high school.
Pentingnya Sertifikasi Halal dalam Perspektif Etika Bisnis Islam terhadap Produk Makanan Halal Bastomi, Rakhma Diana; Oktaviany, Mega; Wandini, Evi Ayu; Shavira, Lely; Hasanudin, Qhonsa Nafisa; Syarifudin, Syarifudin
Eqien - Jurnal Ekonomi dan Bisnis Vol 13 No 02 (2024): Eqien Journal Of Economics and Business
Publisher : Fakultas Ekonomi dan Bisnis Universitas Islam DR KH EZ Mutaqien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34308/eqien.v13i02.1794

Abstract

Halal certification is crucial for consumers, especially Muslim consumers, which is why in Indonesia, there are institutions whose role is to ensure that consumer products, such as food, beverages, and medicines are in accordance with Islamic law, namely the Majelis Ulama Indonesia (MUI) and Badan Pengawas Obat dan Makanan (BPOM). Halal certification not only reflects compliance with Islamic ethical principles, but also builds consumer confidence and supports economic growth based on morals and spirituality. The purpose of this research is to find out how important the inclusion of halal labels on every product circulated by producers. The method used in this research is a qualitative method with systematic literature review technique. The result of this study is the achievement of an increase in producer awareness regarding the importance of halal labels for producers and consumers, so as to achieve a society that is literate in the importance of halal certification.
Co-Authors , Muchammad , Suhartana A. Rahman Abd. Haris Abdul Kohar Abdur Rahman As’ari Adi Apriadi Adiansha Agung Budi Susanto Agus Wibowo Agustian, Rizki Ahmad Tamlikha Ahyar Ahyar Ahyar Ahyar Akem, Umar Alamsyah, Misdar Alfaqih, Adam Alfian Alfian Ali Djamhuri Amiruddin Amiruddin Amri Amri Ana Toni Roby Candra Yudha Anandita, Aulia Silvina Andika Triansyah Anggini, Canda Putri Anita Nurgufriani Aprijal, Aprijal Aprisal, Jelita Septiani Ardiyanto, Riky Arfan Arfan Arif Hidayad Arif Rahman Hakim Ariyanto, Nur Aidi Arnadi Wiranaya, Arnadi Arya Rezagama Aryanto, Nur Aidi Ashibly, Ashibly Audiya , Siti Azisi, Ali Mursyid Baharudin Baharudin Bastomi, Rakhma Diana Budhi Hendrawan, Andre Busra Busra, Busra Dedeh Kurniasih Dety Mulyanti Diana Novita Djuki Sudarmono Dwi Ayu Putri Edy Bambang Irawan Eflita Yohana Erina Sudaryati Erminawati erminawati Fadhilah, Raudhatul Faiza, Nurlaili Adkhi Rizfa Fatkhurrozak, Faqih Fatkrurrozak, Faqih Fauzan, Azkal Rafi Fauzi, Mar’i Fauziyah, Siti Nurul Firdaus Firdaus Firdiansyah, Fitra Azkiya Fithriyaani, Fathimah Gunawan Gunawan Guswandi, Guswandi Haikal Musara Hamdan Hamdan Hamdani Hamdani Hamdi Hamdi Hariz Subhan Hasanudin, Qhonsa Nafisa Heikal, Jerry Hendrawan, Andre Budhi Hepatika Zidny Ilmadina Hery Rahmat Hidayah, Irna Hilman, Amirul I Made Sulandra Ilyas Ilyas Imam Santoso Imam Wahyudi Indrawan, Imam Wahyudi Imran, Andria Insyaniyah, Inarotul Irnesari, Ella Irwan Irwan Ishaq, Ahmad Yugita Iskandar, Muhammad Rozi Ita Fitriati Jalil.M, Abd. Karina, Gladys Donna Kartika Melvina Belinda Köten, Hasan Kholidi, Ahmad Khaerul Kusnadi Liana, Dina Lukman Sanjaya, Firman Mahardika, Reski Malawat, Mahdi Mar’i Fauzi, Mar’i Mardiyanto Mardiyanto Masriani . Masruroh, Aniswatun Menung, Maria Muchammad Muchammad Muhammad Muhammad mukhamad khumaidi usman Mukiat Mukiat Mulyadi Mulyadi Mundiroh, Siti Muslim Muslim Mutia Lisya Nabila Amaro Laila Rosyda Nafiah, Nafiah Nafik Muiz Nur Rasyid Nargis, Desi Nargis Nasrullah Nasrullah Nikmah, Rochmatin Nisa, Zuhriatun Nofaizzi, Mafrur Udif Novianti Novianti Nur Akhmadi, Amin Nur, Syamsuddin Nurafini, Fira Nurhayati Nurhayati Nuri Aslami Nurjanah, Anisa Siti Nurmaida , Desy Khusna Nurrahmah Nurrahmah Nurrahmah Nurrahmah, Nurrahmah Nursidi, Nursidi Oktaviany, Mega Pama, Sindi Ayudia Pamadia, Era Pratama, Eko Purwanto Purwanto Puspita Handayani Putri, Tasya Amelia Qurohman, M. Taufik R, M Ziran Maulana Raden Mohamad Herdian Bhakti Rahayu, Hastanti Agustin Rahman Rahman Rahmat Hidayat Rahmawati, Lusy Ramadhan, Masri Ramiati Ramiati Ranjani, Gita Rinaldi, Sebastian Riyan, Lalu Rizky, Alfida Isabella Rokhmah, Asnalia Rosyida, Ida Rozi Iskandar, Muhammad RR. Ella Evrita Hestiandari Sabri Sabri Safinatunnaja, Indy Safitri, Masna Nuros Sanjaya, Firman Sanjaya, Firman Lukman Sapriyanto, Eko Saptaryani, Titiek Deasy Setijo Budi, Sigit Shavira, Lely Sibagariang, Yohanes Sidarta, Alphasyah Lazuardy Sigit Setijo Budi, Sigit Setijo Soni Ariawan Stiawan, Hari Subanji Subanji Suhartana Suhartana Supardi Supardi Supiyati, Yati Susilawati, Susilawati Syahidin Syahidin, Syahidin Syaiful . Syamsul Arifin Taswanda Taryo Taufikurrahman Taufikurrahman Tiolina Evi Nausta Pardede Tirtasari, Maidaturrizky Titi Yuniarti, Titi Tjiptohadi Sawarjuwono Tuanani, Ismail Tuanany, Ismail Umi Aisyah, Umi Usaman , M. Khumaidi Usman , M. Khumaidi Usman, M. Khumaidi Utami, Vina Bekti Wandini, Evi Ayu Widiyastuti, Nanik Yazid, Muhammad Afiq bin Mohd Yoseph, Yoseph Yudhyarta, Deddy Yusuf Yulia Ayriza Yulianisah, Yulianisah Yuniara, Ridha YUSUF HASBULLAH Zamhariri Zamhariri, Zamhariri Zulaidi, Zulaidi Zulkarnaen, Irfan