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Spider Web Shape of Brass Catalytic Converter for Reducing Exhaust Gas Emission Hendaryati, Heni; Mokhtar, Ali
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 2, No 1 (2017)
Publisher : University of Muhammadiyah Malang

The rapid increase of the number of motor vehicles, especially motorcycles, makes serious problem caused by the pollution from gas emission of fossil fuel combustion. The problems related to human health and the erosion on ozone layer is credited to its gas emission. Several dangerous and toxic gasses such as Hydrocarbon (HC), Carbon Monoxide (CO), and Nitrogen Oxide (NOx), Sulphur Dioxide (SO2), and Lead (Pb) are emitted during IC engine operation.To manage those dangerous gasses, catalytic converter which converts the gasses into more eco-friendly CO2H2O and N2 may be employed. In this research, a specially designed catalytic converter made from brass (CuZn) wire in the form of spider web pattern was fitted into exhaust system of a standard motorcycle. The performance of the converter for several engine rotation speeds was examined by measuring CO and HC of exhaust by using Gas Analyzer.By comparing the exhaust of a standard exhaust system and modified exhaust system (fitted with converter), it can be concluded that the converter was able to decrease the exhaust emission gas. For HC content, the percentage of decrease was as much as 36,88 % for converter fitted exhaust system compared to 61.12% for standard one. For CO content, the decrease percentage was 19.90% compared to 80.10% for standard one.

ANALISIS EFISIENSI TERMAL PADA KETEL UAP DI PABRIK GULA KEBONAGUNG MALANG Heni Hendaryati
Jurnal Gamma Vol. 8 No. 1 (2012): September
Publisher : Jurnal Gamma

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ANALISIS EFISIENSI TERMAL PADA KETEL UAP DI PABRIK GULA KEBONAGUNG MALANGHeni HendaryatiStaf Pengajar Jurusan Teknik Mesin, Fakultas TeknikUniversitas Muhammadiyah MalangEmail : henihendaryati@yahoo.comABSTRACTAmid strong currents of globalization and the energy crisis such as rising fuel prices that hit the world’s sugar industry claimed to be more competitive to face increasingly fierce competition. Under these conditions, suppress the dissipation of energy and attention on energy conservation becomes an important thing to do. Source of energy for the process of sugar production in sugar mills Kebon Agung Malang generated from the boiler in the form of steam. The plant operates using 2 pieces of boiler, Boiler Yoshimine H-2700 with a capacity of 80 tons / hour and Boiler Yoshimine H-3500 with a capacity of 100 tons / hour. This study aims to determine the efficiency of boilers used and assess energy conservation in the boiler. During this study, the boiler is in operation with fuel bagasse (bagasse). Data is collected by recording directly from the control panel. Data is taken every hour for 24 hours a day, the study was conducted for 30 days. Research shows the average thermal efficiency by the heat balance method for the Boiler Yoshimine H-2700 was 74.8% and Boiler Yoshimine H-3500 was 73.9%. Sankey Diagrams Based on the amount of heat entering the steam boiler for the second kettle is 1713.194 kcal / kg. Heat lost to Boiler Yoshimine H-2700 is 425.915 kcal / kg, so the heat is used is 1287.279 kcal / kg. While the heat lost to Boiler Yoshimine H-3500 is 445.653 kcal / kg, so the heat is used is 1267.541 kcal / kg.Key note : Boiler, heat balance, efficiency

Spider Web Shape of Brass Catalytic Converter for Reducing Exhaust Gas Emission Heni Hendaryati; Ali Mokhtar
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i1.4902

The rapid increase of the number of motor vehicles, especially motorcycles, makes serious problem caused by the pollution from gas emission of fossil fuel combustion. The problems related to human health and the erosion on ozone layer is credited to its gas emission. Several dangerous and toxic gasses such as Hydrocarbon (HC), Carbon Monoxide (CO), and Nitrogen Oxide (NOx), Sulphur Dioxide (SO2), and Lead (Pb) are emitted during IC engine operation.To manage those dangerous gasses, catalytic converter which converts the gasses into more eco-friendly CO2H2O and N2 may be employed. In this research, a specially designed catalytic converter made from brass (CuZn) wire in the form of spider web pattern was fitted into exhaust system of a standard motorcycle. The performance of the converter for several engine rotation speeds was examined by measuring CO and HC of exhaust by using Gas Analyzer.By comparing the exhaust of a standard exhaust system and modified exhaust system (fitted with converter), it can be concluded that the converter was able to decrease the exhaust emission gas. For HC content, the percentage of decrease was as much as 36,88 % for converter fitted exhaust system compared to 61.12% for standard one. For CO content, the decrease percentage was 19.90% compared to 80.10% for standard one.

The Effect of Agitation Parameter on Hardness and Thickness of Decorative Nickel-Chrome Coating on A36 Steel using Electroplating Process Akmal Hanif Khairullah Harsito; Iis Siti Aisyah; Daryono Daryono; Ali Saifullah; Heni Hendaryati; Sudarman Sudarman
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 5 No. 2 (2020)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v5i2.13726

Electroplating is a process of settling substances (metal ions) on the electrodes (cathodes) using electrolysis. The occurrence of a precipitate in this process is due to the presence of electrically charged ions moving from an electrode through the electrolyte, the result of the electrolyte will seal on another electrode (cathode). During the process of deposition/deposit takes place a chemical reaction occurs at the electrode and electrolyte both reduction in a certain direction permanently, therefore it requires direct current and a constant voltage. Metal coatings commonly used are copper, nickel, chromium, and others. Electroplating is basically to coat the metal to make it look more attractive and protected from corrosion, and can increase the product's resistance to friction. The purpose of this study was to determine the effect of stirrer rpm variations on the thickness and thickness of the A36 steel layer in the decorative nickel-chrome electroplating process. 4 specimens in this study were 30x30x2 (mm). Nickel and chromium coatings have variations in the speed of 72, 102, 132, and 162 (rpm) with a time immersion of 22 minutes and with a temperature of 55-60 ° C. The results of this electroplating process were tested by Vickers's hardness test and observation of microstructure results. The results showed that the faster the rpm, the more hardness was obtained which increased and the thickness of the layer increased. The highest hardness and thickness values are found at a rotational speed of 132 rpm. With a hardness value of 77.5 VHN and a thickness value of 4.55 µm (Nickel) and 13.76 µm (Chrome).

PENGARUH TIPE SALURAN PENGECORAN TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO ALUMINIUM AL 6061 DENGAN METODE SAND CASTING Heni Hendaryati; Mohamad Irkham Mamungkas
ROTOR Vol 14 No 2 (2021)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Industrial technology is developing very rapidly, one of which is in the field of metal casting. In the foundry case, aluminum is one of the most used types. It happen because of aluminum has many advantages than other types of metal, likely: good corrosion resistance, relatively high mechanical properties, and good formability. The purpose of this study was to determine the effect of variations in the duct system on the tensile strength and impact strength of Al 6061 aluminum using the sand casting method. A variation of this line system was to use a direct line, split line, and split line with an adder. From the results of the study, it was found that the ultimate tensile strength occurred in the specimens using a split channel pattern with an adder, which was 120.25 MPa, while the lowest tensile strength occurred in the specimens using a direct channel pattern which was 65,49 MPa. This also occurs for the highest impact value in the variation of the split pattern system with addition of 0.0081 J/mm2 and the lowest impact value is using the direct channel pattern which results in an impact value of 0.005508 J/mm2

Media Pembelajaran Digital Berbasis Macromedia Flash untuk Mata Pelajaran Fisika tingkat SMP Andinusa Rahmandhika; Heni Hendaryati; Ary Dwi Astuti
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol 7 No 1 (2022): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v7i1.2295

The development and improvement of teaching innovation aim to bring an enjoyable, joyful, active, and creative atmosphere for students to increase and improve their achievement. Teaching media that support student's creativity and critical thinking are needed to facilitate teachers presenting the learning material. Information and Communication Technology (ICT) can introduce media to increase students' learning motivation. This program instructs teachers in using Macromedia flash software to create learning media applications for the physics units. It was conducted in SMP Muhammadiyah 6 Dau Malang. An instrument to observe the teaching situation is an interview with the teacher. Information from the interview, students have high motivation during their practice in the lab, but the opposite occurs in the class. The result of this program is an attractive teaching media application created by using Macromedia Flash software.

EKSTRAK DAUN KALIANDRA SEBAGAI INHIBITOR ALAMI LAJU KOROSI ST-37 Moh. Jufri; Indra Surya; Ali Saifullah; Suwarsono Suwarsono; Rr. Heni Hendaryati; Sudarman Sudarman
ROTOR Vol 15 No 1 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

The utilization of natural resources as a metal inhibitor is widely researched. The extract of Calliandra leaves is one of the natural resources utilized to prevent the corrosion rate. It contains high tannins, which is a natural compound that can be utilized as an inhibitor of the corrosion rate. The research is aimed to find out the efficiency of Calliandra leaves extract as the natural inhibitor for steel ST-37. The experiment method is applied to vary the extract of Calliandra leaves in the corrosive medium. Meanwhile, the extraction of Calliandra leaves uses the maceration method. The extraction of Calliandra leaves with the solvent uses an evaporation process using a rotary vacuum evaporator. The extract used as the inhibitor is determined in 5%, 10%, and 20% of concentrations. The sample test of corrosion used is steel ST-37 with 4 × 4 cm of dimension and 0.2 cm of thickness. The best inhibition efficiency is 99.73% with an inhibition concentration of 20% in HCl. It shows that the extract of Calliandra leaves works well as an inhibitor, and it is efficient to inhibit the corrosion rate.

The Effect of Electroplating Hard Chrome with Different Dissolvent Compositions to the Mechanical Properties of ST-37 Mohammad Jufri; Yeshar Ego Ginola; Rr. Heni Hendaryati; Ali Saifullah; Daryono
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 6 No. 3 (2021)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v6i3.20669

Electroplating hard chrome is a metal plating process with hard chrome which aims to not only coat as decorative, but also to coat metal surfaces more strongly, according to their use in the engineering world. In addition to decorative properties, the advantages of surface treatment techniques can also increase hardness, wear resistance, and corrosion resistance. The purpose of this research is generally to determine the effect of different solution compositions in the electroplating process of hard chrome on the impact strength of the structure on ST-37 steel. This time the specimens are 100mm x 6mm x 6mm and 50mm x 50mm as many as 3 pieces. In this study, the electroplating process of hard chrome was carried out using different parameters of the CrO3 solution composition from previous studies, namely 200 gr/lt, 350 gr/lt, and 400 gr/lt with an immersion time of 22 minutes. The results of this electroplating process were tested by testing the impact strength and microstructure. The results of the study can be concluded that the more the composition of the solution, the higher the impact toughness. The highest impact toughness value is 0.998 joules/mm2 at a solution concentration of 400 grams/litre and the surface results on ST-37 steel after getting hard chrome electroplating treatment is that the surface has Cr elements attached and gets thicker with increasing concentration which is used as a variation with the same immersion time.

Pengaruh Variasi Komposisi Bahan Bakar (Ethanol-Pertalite) terhadap Performansi pada Sepeda Motor Matic Vario 125cc M Mulyono; Roro Heni Hendaryati; Shodik Nur Firdaus
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2019: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Ethanol atau bioethanol salah satu sumber energi yang dapat diperbaharui, sehingga sangat baik untuk dimanfaatkan sebagai bahan bakar alternative untuk kendaraan bermotor. Negara berkembang seperti Brasil dan Amerika Serikat, sudah banyak menggunakan campuran etanol dan bensin untuk kendaraan bermotor. Penelitian ini bertujuan untuk mendapatkan variasi komposisi bahan bakar (ethanolpertalite) terhadap performansi sepeda motor matic 125cc. Metode yang digunakan dalam penelitian ini adalah eksperimen yaitu melakukan pengujian secara langsung tentang torsi, daya dan emisi gas buang. Penelitian ini menggunakan bahan campuran pertalite dan (25%, 35%, 45%, 55%) ethanol. Hasil penelitian menunjukkan torsi dan daya maksimal diperoleh pada campuran 55% etanol. Penambahan etanol pada pertalite dapat mengurangi kadar emisi CO, HC, dan CO2, sedangkan emisi O2 tidak mengalami penururan karena kelebihan kadar oksigen pada ethanol.

Pengaruh Perlakuan Pemanasan terhadap Kekuatan Tarik Komposit Serat Daun Nanas dengan Metode Vacuum Infusion Mohamad Irkham Mamungkas; Heni Hendaryati; Murjito Murjito
J-Proteksion Vol 7, No 2 (2023): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v7i2.8665

Penelitian ini bertujuan untuk mengetahui kekuatan tarik dari pemberian perlakuan pemanasan dan lama waktu pemanasan pada serat nanas terhadap sifat mekanik komposit. Komposit yang digunakan pada jenis ini adalah menggunakan komposit serat alam, yaitu serat nanas. Sifat mekanik yang diukur pada penelitian ini adalah kekuatan tarik. Dengan pemberian treatment pada komposit diharapkan kekuatan tarik akan meningkat. Metode pembuatan spesimen komposit dengan metode vacuum infusion menggunakan standar uji tarik ASTM D-683-03. Variabel bebas dalam penelitian ini adalah temperatur pemanasan dan waktu pemanasan. Variasi temperatur pemanasannya adalah 70°C, 80°C, dan 90°C. Sedangkan untuk waktu pemanasan dimulai dari 1 jam, 2 jam, hingga 3 jam. Perlakuan pemanasan dan lamanya pemanasan terhadap serat dilakukan setelah serat diberi alkalisasi dengan menggunakan NaOH. Hasil yang didapat dari penelitian ini bahwa kekuatan tarik yang tertinggi didapat pada variasi temperatur pemanasan 70°C dan waktu pemanasan selama 2 jam, yaitu sebesar 1,493 Mpa.

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