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All Journal Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) Journal of Applied Engineering and Technological Science (JAETS) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Automotive Experiences Asian Journal of Science, Technology, Engineering, and Art
Sri Rizki Putri Primandari
Universitas Negeri Padang
Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Analysis of the Effect of a Glass Layer on the Roof of a House of a Thermoelectric Generator on Temperature and Electrical Voltage Aprizal Saputra; Remon Lapisa; Refdinal Refdinal; Sri Rizki Putri Primandari
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 4 No 2 (2022): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (594.098 KB) | DOI: 10.46574/motivection.v4i2.115

Abstract

Utilization of solar power can use a thermoelectric generator. Thermoelectric Generators work by taking advantage of temperature differences and the application of the Seebeck effect. This experimental study uses two prototypes of a perfect house with a roof made of zinc plate. One of the roofs of the house is covered with glass. Thermoelectrics are installed at the bottom of the roof of each house as many as 12 pieces and arranged in a series circuit. Data collection was carried out one day from 08.00 -15.59. The largest electrical voltage obtained occurred at 11.00 – 13.59 reaching 0.215 – 0.183 Volts in houses with glass-covered roofs and 0.654 – 0.527 Volts. The use of a layer of glass makes the roof temperature stable because the heat absorbed can be retained by the glass. As a result, the voltage generated in a house with a glazed roof is more stable than a house with a non-glazed roof. This research also proves that the difference in temperature affects the voltage generated by the thermoelectric. Pemanfaatan tenaga surya dapat menggunakan termoelektrik generator. Termoelektrik Generator bekerja dengan memanfaatkan perbedaan temperatur dan penerapan efek Seebeck. Penelitian eksperimen ini menggunakan dua prototipe rumah sempurna dengan atap dari seng plat. Salah satu atap rumah dilapisi dengan kaca. Termoelektrik dipasang pada bagian bawah atap masing-masing rumah sebanyak 12 buah dan disusun dengan rangkaian seri. Pengambilan data dilakukan satu hari dari pukul 08.00 -15.59. Tegangan listrik terbesar yang didapatkan terjadi pada pukul 11.00 – 13.59 mencapai 0,215 – 0,183 Volt pada rumah dengan atap dilapisi kaca dan 0,654 – 0,527 Volt. Penggunaan lapisan kaca membuat temperatur atap menjadi stabil karena panas yang diserap dapat ditahan oleh kaca. Akibatnya membuat tegangan yang dihasilkan pada rumah dengan atap dilapisi kaca lebih stabil. Dari penelitian ini juga membuktikan perbedaan temperatur mempengaruhi tegangan listrik yang dihasilkan oleh termoelektrik.
Peningkatan Produktivitas Getah Gambir Melalui Inovasi Alat Pencetak Getah Gambir Andril Arafat; Sri Rizki Putri Primandari; Nofri Helmi; Jasman Jasman; Junil Adri; Remon Lapisa
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 21, No 3 (2021): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.01860

Abstract

Tujuan pelaksanaan pengebadian kepada masyarakat ini adalah untuk meningkakan ekonomi masyarakat petani gambir melalui efesiensi waktu, biaya, dan tenaga yang dibutuhkan dalam pengolahan getah gambir. Inovasi yang ditawarkan berada pada proses pencetakan getah gambir. Permasalahan mendasar masyarakat pada proses ini berada pada waktu dan tenaga yang dibutuhkan dalam proses pencetakan getah sehingga harus membayar upah tenaga kerja untuk proses pencetakan. Metode yang digunakan dalam pengabdian ini dengan memberikan teori pengantar, demonstrasi, praktek dan aplikatifnya secara langsung. Hasil dari kegiatan ini adanya alat pencetak getah gambir dengan mekanisme impact yang menjadikan proses pencetakan lebih cepat, mudah dan efisien. Alat pencetak telah diserah terima dengan masyarakat petani gambir melalui pemerintah kenagarian.
Peningkatan Kemampuan Berwirausaha Pembuatan Bubuk Kopi Bagi Ikatan Pemuda Desa Cubadak Air Dan Sikapak Barat Kecamatan Pariaman Utara, Kota Pariaman Arwizet Karudin; Zainal Abdi; Sri Rizki Putri Primandari
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 20, No 3 (2020): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.0580

Abstract

Banyaknya angka pengangguran akan menimbulkan dampak sosial yang kurang baik di tengah masyarakat. Untuk itu perlu adanya upaya untuk meningkatkan keterampilan masyarakat melalui pelatihan. Artikel ini bertujuan untuk menggambarkan proses pelatihan dalam rangkan peningkatan kemampuan berwirausaha pembuatan bubuk kopi bagi ikatan pemuda di desa Cubadak Air dan Sikapak Barat. Metode pelatihan yang digunakan adalah metode ceramah dan demonstrasi. Pelatihan ini diikuti oleh 10 orang peserta yang berasal dari Desa Cubadak Air dan Sikapak Barat. Metode ceramah berupa penyampaian teori tentang kopi, teknik rosting, teknik grinding, packing dan pemasaran kopi. Metode demonstrasi digunakan mulai dari cara meroasting, menggrinding dan packing kopi. Hasil pelatihan terlihat bahwa peserta sangat termotivasi dan serius mengikuti pelatihan hal terlihat dari skor tes yang diberikan telah terjadi peningkatan yang signifikan pengetahuan dan keterampilan peserta tentang kopi, teknik roasting, grinding dan packing kopi dari rata-rata skor 63,0 menjadi 84,2. Dapat disimpulkan bahwa peserta mampu menyerap dengan baik pengetahuan dan keterampilan yang diberikan selama pelatihan. Diharapkan akan muncul wirausaha-wirausaha baru dalam bidang pembuatan bubuk kopi di daerah ini.
Alat Penyulingan Serai Wangi Untuk Meningkatkan Hasil Sulingan Masyarakat Lokal Sri Rizki Putri Primandari; Andre Kurniawan; Berril Habibil Rizka; Muhammad Azim
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 22, No 2 (2022): Suluah Bendang: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.02300

Abstract

Nagari Gurun terletak di Kecamatan Harau, Kabupaten 50 Kota. Topografi nagari Gurun yang berbukit-bukit menjadikan nagari ini berpotensi untuk pengembangan tanaman serai wangi dan industri pengolahan minyak atsiri dari daun serai wangi. Pengolahan tanaman sereh wangi memberikan kontribusi besar dalam peningkatan perekonomian masyarakat lokal. Sebagian masyarakat lokal telah membudidayakan tanaman serai wangi dan telah memiliki alat penyulingan. Namun, alat penyulingan tersebut masih sederhana, berkapasitas kecil, dan belum efektif serta efisien karena masih banyak uap yang terbuang dari mesin penyulingan sehingga meningkatkan konsumsi bahan bakar. Oleh itu, melalui Program Kemitraan Masyarakat maka solusi yang ditawarkan adalah penerapan alat penyulingan serai wangi yang memiliki kapasitas lebih besar, berteknologi sehingga proses penyulingan lebih baik, dan efektif dan efisien. Kegiatan PKM ini meliputi desain alat penyulingan, pembuatan mesin, dan pelatihan penggunaan alat. Mesin penyulingan yang dibuat adalah bejana yang didesain secara khusus untuk menyuling serai wangi yang dilengkapi dengan pengukur temperatur, tekanan, dan katup pengaman supaya penyulingan lebih efektif dan efisien. Hasil menunjukkan bahawa hasil sulingan lebih banyak dalam waktu penyulingan yang sama sebelum menggunakan mesin PKM.
CONTRIBUTION OF USING GOOGLE CLASSROOM APPLICATION ON STUDENTS' LEARNING INTEREST AT SMK NEGERI 1 BATIPUH Septa Zela Dirgantara; Budi Syahri; Remon Lapisa; Sri Rizki Putri Primandari
Journal of Mechanical Engineering Education Vol 9, No 1 (2022): Juni 2022
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jmee.v9i1.46095

Abstract

Covid-19 makes learnings procesed carrie outs online learnings with the help of applications, at SMK N 1 Batipuh an online learning process is also carrie outs, namely withs helps of Google Classroom applications, this has an impacts on students interests in the learnings process. This condition that affects interest in learning occurs because theres are severals obstacle in online learnings processed such as internet connections that make students not understand in learnings. purposed of his studied was to finds outs how much of a contribution was made in the use of Googles Classroom on student interested in learnings lathe engineering subjects in class XI SMK N 1 Batipuh. The quantitative approachs use in this researched. A quantitatived approachs is use researchers to measured the contribution of the used Google Classroom in onlines learnings to interest in learning. In data analysis, this know thats the Sig valued is 0.0, which mean 0.05, it is stated that the data is correlated. The contribution of use of the googles classroom application to student interested in learnings is 0.970. So Ha is accept, whichs mean that theres is a contribution from the uses of Google Classroom in online learning to interest in learning. Its know thats the data from the correlations coefficients is 0.970 and the coefficients of determinations is 94%. The conclusion of this research is thats thered is a contribution betweens applications of the Googles Classrooms applications on student interested in learning in lathe engineering subjects for class XI SMK Negeri 1 Batipuh.Keywords: Contributions; Google Classroom; Interest in Learning; Lathe Machining Techniques; SMK N 1 Batipuh
Combustion and Emission Characteristics of CNG-Diesel Dual Fuel Engine with Variation of Air Fuel Ratio Dori Yuvenda; Bambang Sudarmanta; Jamaludin Jamaludin; Oki Muraza; Randi Purnama Putra; Remon Lapisa; Krismadinata Krismadinata; Rahadian Zainul; Asnil Asnil; Muji Setiyo; Sri Rizki Putri Primandari
Automotive Experiences Vol 5 No 3 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.7807

Abstract

Compressed natural gas (CNG) is a popular alternative fuel because of its more environmentally friendly properties than fossil fuels , including applications in diesel engines. However, supplying too much compressed natural gas fuel causes poor engine performance and emissions due to a decrease in the air-fuel ratio on the dual-fuel engine. The addition of air using electric superchargers was done to return the air-fuel ratio to ideal conditions. Lambda value (λ) was variation under low load (1.52 to 2.71), medium load (1.18 to 2.17), and high load (0.94 to 2.17) on a CNG-diesel dual fuel engine. The addition of pure air in each load can increase combustion stability in certain lambda, which was indicated by an increase in thermal efficiency, heat release rate, and a decrease in ignition delay, combustion duration, hydrocarbon, and carbon monoxide emissions.
Optimization of Waste Cooking Oil’s FFA as Biodiesel Feedstock Sri Rizki Putri Primandari; Andril Arafat; Harumi Veny
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.331 KB) | DOI: 10.24036/teknomekanik.v4i1.9072

Abstract

Waste cooking oil has high Free Fatty Acid (FFA). It affected on decreasing a biodiesel production. FFA reduction is one of important processes in biodiesel production from waste cooking oil. Thus, this study aimed to examine the optimum condition in FFA reduction. The process is assisted by using ultrasonic irradiation on acid esterification. Variables of the process are acid concentration, molar ratio of methanol and oil, and irradiation time. Meanwhile temperature irradiation on 45oC is a control variable. Process optimization is conducted by Response Surface Methodology (RSM) with Central Composite Design (CCD). The optimum conditions of response were 7.22:1 (methanol to oil molar ratio), 0.92% wt H2SO4, 26.04 minutes (irradiation time), and 45oC (irradiation temperature). Ultrasonic system reduced FFA significantly compared to conventional method.
Pengaruh Konversi Minyak Sawit Menjadi Biodiesel dengan Katalis Abu Limbah Boiler Bayu Rahmat; Sri Rizki Putri Primandari
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): DECEMBER
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.1912

Abstract

Biodiesel is one of the various alternative energy options to replace the role of diesel or petroleum. Using the basic ingredient, namely palm oil, which is renewable and more environmentally friendly. The palm oil used is not used cooking oil because the focus of this research is to test the effect of boiler waste ash as a catalyst so that the esterification stage can be skipped and focuses on the transesterification stage. The catalyst commonly used today is a homogeneous catalyst that is produced and has a negative impact if there is too much residual substance. Currently, there is not much use for boiler waste ash so much of it is wasted as waste and it is known that boiler waste ash is alkaline and contains alkaline substances so that it can be used as a heterogeneous catalyst to replace homogeneous catalysts. At this tranesterification stage, two types of treatment are given, namely variations in temperature and catalyst concentration to see the best comparison of the several types of samples. The transesterification stage uses a 1:1 ratio of oil and methanol and the addition of 1% KOH. The results of this stage produce biodiesel with characteristics, namely a density ranging between 854-859 Kg/m3 and a viscosity in the range 3,32-4,47 mm2/s, which meets SNI biodiesel standards. From this research, it can be concluded that boiler waste ash has the potential as a heterogeneous catalyst in making biodiesel, replacing homogeneous catalysts and adding to the processing of palm oil boiler waste.
Konversi Minyak Sawit Menjadi Biodiesel dengan Katalis Abu Sekam Padi Fikry Naufal Arman; Sri Rizki Putri Primandari
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): DECEMBER
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.1925

Abstract

Based on data from the Coordinating Ministry for the Economy, in 2022 Indonesia will contribute 52% of palm oil to the world market share and will be able to produce 40% of the world's total vegetable oil, this will encourage Indonesia to increase the use of biofuels such as biodiesel.Rice husks are still not well utilized so they only become piles of waste. This research aims to determine the effect of rice husk ash as a catalyst in making biodiesel. Rice husks contain compounds as catalyst support, namely SiO2.At this tranesterification stage, two types of treatment are given, namely variations in temperature and catalyst concentration to see the best comparison of the several types of samples. The transesterification stage uses a 1:1 ratio of oil and methanol and the addition of 1% KOH. The results of this stage produce biodiesel with characteristics, namely a density ranging from 857.2-862.4 Kg/m3 and a viscosity in the range 3.25-4.48 mm2/s which meets SNI biodiesel standards. From this research it can be concluded that rice husk ash has the potential as a heterogeneous catalyst in making biodiesel to replace homogeneous catalysts.
Effect of Temperature and Pressure on the Density of Organic Waste Briquettes Riky Satria; Yolli Fernanda; Refdinal Refdinal; Sri Rizki Putri Primandari
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 5 No 3 (2023): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v5i3.246

Abstract

Organic waste is one way of utilizing biomass to produce energy. The advantage of biomass is that it tends to be renewable. The energy from biomass that will be used to make briquettes is processed and compressed into a more regular form with a high calorific value. This research will involve organic waste as a source of biomass. To obtain briquettes that are dense, tight, and in good condition, tests were conducted with various temperature and pressure settings. Organic waste with particle size between 18 and 30 mesh is used in this method. Briquetting using heat-treated molds, with temperatures of 200, 250 and 300 °C with a holding time of 5 minutes and also applying pressures of 5 MPa, 10 MPa, 15 MPa and 20 MPa. At 300 °C, 10 and 20 MPa pressure, the briquettes were dense, tight and had high density values. Sampah organik merupakan salah satu cara pemanfaatan biomassa untuk menghasilkan energi. Keuntungan dari biomassa adalah bahwa hal itu cenderung diperbaharui. Energi dari biomassa yang akan digunakan untuk membuat briket diolah dan dikompresi menjadi bentuk yang lebih teratur dengan nilai kalor yang tinggi. Penelitian ini akan melibatkan limbah sampah organik sebagai sumber biomassa. Untuk mendapatkan briket yang padat, rapat, dan dalam kondisi baik, dilakukan pengujian dengan berbagai pengaturan suhu dan tekanan. Sampah organik dengan ukuran partikel antara 18 dan 30 mesh digunakan dalam metode ini. Pembriketan menggunakan cetakan yang diberi panas, dengan suhu 200, 250 dan 300 ℃ dengan waktu penahanan 5 menit dan juga pemberian tekanan 5 MPa, 10 MPa, 15 MPa dan 20 MPa. Pada suhu 300 °C, tekanan 10 dan 20 MPa dihasilkan briket yang padat, rapat dan memiliki nilai densitas yang tinggi.
Co-Authors Andre Kurniawan Aprizal Saputra Arafat, Andril Arwizet K Asnil Asnil Bambang Sudarmanta Bayu Rahmat Berril Habibil Rizka Budi Syahri Dori Yuvenda Fikry Naufal Arman Gusni Sushanti Harumi Veny Jamaludin Jamaludin Jasman Junil Adri Krismadinata Krismadinata Krismadinata Krismadinata, Krismadinata Muhammad Azim Muhammad Djoni Bustan Muji Setiyo Mulianti Mulianti Nofri Helmi Oki Muraza Rahadian Zainul Randi Purnama Putra Refdinal, Refdinal Remon Lapisa Riky Satria Septa Zela Dirgantara Sri Haryati Tarig Elshaarani Yolli Fernanda Yus Donald Chaniago Zainal Abdi