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All Journal Jurnal technoscientia JPSE (Journal of Physical Science and Engineering) JURNAL TEKNOLOGI TECHNOSCIENTIA V-MAC (Virtual of Mechanical Engineering Article)
Dewi Sartika
Program Studi Teknik Mesin, Fakultas Teknik, Universitas PGRI Banyuwangi
Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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PREPARASI DAN KARAKTERISASI NANOPARTIKEL Fe3O4 MENGGUNAKAN METODE KOPRESIPITASI Ani Santi Lestari; Dewi Sartika
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1230.443 KB) | DOI: 10.34151/technoscientia.v11i1.109

Abstract

Nanoparticles is a material or particle which nanometers size. It has done research making nanoparticles Fe3O4 with kopresipitation methods then characterization XRD and TEM to knowing the characteristic and particles size of sample. The result of characterization XRD detected by appearing the peaks difraction an angle of 30; 35,4; 43; 53,4; 56,9; and 62,5. The result of TEM characterization is 13,68 nm and 14,33 nm of particles size.
Studi Penyerapan Logam Berat Pb Menggunakan Nanopartikel Fe3O4 Dewi Sartika; Eko Malis; Ani Santi Lestari
JPSE (Journal of Physical Science and Engineering) Vol 4, No 1 (2019): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Logam berat saat ini telah menjadi perhatian besar bagi masyarakat maupun pemerintah. Logam berat tersebut merupakan zat yang berbahaya karena membawa dampak besar pada kesehatan manusia, tanaman, maupun peternakan. Penelitian ini difokuskan pada  Timbal (Pb) sebagai sampel logam berat. Sifat magnetik dan ukuran nanopartikel dalam orde nano telah dikonfirmasi mampu menyerap logam berat. Dari hasil percobaan, diketahui bahwa nanopartikel Fe3O4 yang dihasilkan mampu menyerap logam berat Pb hingga mencapai 99,98% pada variasi konsentrasi masa adsorben 0,56 gram hingga 0,70 gram. DOI: http://dx.doi.org/10.17977/um024v4i12019p018
PREPARASI DAN KARAKTERISASI NANOPARTIKEL Fe3O4 MENGGUNAKAN METODE KOPRESIPITASI Ani Santi Lestari; Dewi Sartika
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i1.109

Abstract

Nanoparticles is a material or particle which nanometers size. It has done research making nanoparticles Fe3O4 with kopresipitation methods then characterization XRD and TEM to knowing the characteristic and particles size of sample. The result of characterization XRD detected by appearing the peaks difraction an angle of 30; 35,4; 43; 53,4; 56,9; and 62,5. The result of TEM characterization is 13,68 nm and 14,33 nm of particles size.
Pengaruh Jumlah dan Rasio Sudut Lengkung Sudu Terhadap Unjuk Kerja Turbin Angin Savonius Heliks Ahmad Lazim Rosyid; Ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 5 No 2 (2020): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v5i2.1038

Abstract

The helical Savonius is a vertical wind turbine that can utilize wind energy to become a renewable energy source. This study aims to determine the effect of the number of blades and the ratio of blade bends on the performance of the Savonius helical wind turbine. The research was conducted through experimentation using variations in the number of blades 2 and 3 blades. Variation of blade bending ratio H / L = 6/10, 7/10 and 8/10 and variations in wind speed (4.0), (5.2), (6.4) and (7.4) m / s. The turbine performance analysis is reviewed based on the shaft rotation (RPM) of the turbine and the output voltage (volts) generated by the generator connected to the turbine shaft. The results showed that the wind speed, the number of blades, and the blending ratio of the blades affect the performance of the Savonius helical wind turbine. The results of the maximum wind turbine performance test at a variation of 3 blades, a ratio of 6/10, and a wind speed of 7.4 m / s, produce a shaft rotation value of 472.9 rpm and a generator output voltage value of 5.51 volts. Keywords: Helical Savonius, number and ratio blade bend, wind speed, performance
Pengaruh (Matrik) Pola Susunan Serat Terhadap Karakterisktik Peredam Suara Berbahan Sabut Kelapa Asrul Ainun Najah; Ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 5 No 2 (2020): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v5i2.1039

Abstract

Noise is something that can be annoying. A silencer is a tool to reduce unwanted sound. This study aims to obtain the matrix characteristics of the fiber arrangement pattern on sound attenuation and the ratio of the composite material mixture. The method used in this research is to vary the ratio of flinkote oil mixtures 70%: 30%, 60%: 40%, 50%: 50%, as well as variations in the matrix pattern of coconut fiber composition with parallel matrices, straight oblique cross, how to make composites with how to spray flinkote oil onto the fibers using a spray gun. The analysis of the research is the reduction of the sound produced. The ratio of the mixture and the matrix of the fiber arrangement pattern affects the resulting sound reduction value. The results showed that the flinkote oil mixture ratio of 60%: 40% resulted in the highest reduction value of 4.96%, for the lowest results found in the ratio of flinkote oil mixture 50%: 50% fiber with a noise reduction value of 4.24%. The results of the analysis show that the ideal mixture occurs in composites of 60%: 40%, so that the flinkote oil can bind the fibers sufficiently and the composites are porous, in the 50%: 50% composites there are strains because the flinkote oil is unable to bind the fibers. In the fiber arrangement pattern matrix, there is the highest noise reduction value in the parallel matrix, namely 4.96%, for the lowest result is in the straight-sloping matrix with a reduced value of 3.90%, the analysis results in the parallel matrix have good noise wave propagation, because In the parallel matrix there is no wave interference phenomenon, resulting in parallel propagation of noise waves, in the straight-sloping matrix there is an interaction phenomenon between incoming waves and waves called interference so that noise waves increase and result in a low noise reduction level.
Pengaruh Efektifitas Rasio Campuran Bahan Limbah Kotoran Sapi Dan Limbah Pohon Pisang Terhadap Hasil Biogas Sahrul Al Husaini; Ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 6 No 1 (2021): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v6i1.1103

Abstract

Penggunaan energi bahan bakar dari fosil terbesar berada pada sektor transportasi, industri dan pembangkit daya atau listrik. Tujuan dalam penelitin ini adalah untuk mencari efektifitas rasio campuran limbah kotoran sapi dan limbah pohon pisang terhadap hasil pembuatan bio gas. Penelitian menggunakan varasi bahan campuran yang meliputi kotoran sapi dengan campuran limbah pohon pisang, air dan EM4 dengan rasio A (1:5:5:10:1), B (5:7:10:1) dan C (7:5:10:1). Proses fermentasidilakukan selama 10 hari dengan disertai pengukuran tekanan gas/hari menggunakan manometer U dan uji nyala api. Analisis nyala api meliputi pengukuran luas penampang api, warna api dan temperatur api. Hasil penelitian menunjukkan bahwa rasio campuran berpengaruh terhadap karakteristik gas produk. Tekanan gas tertinggi pada campuran C sebesar 251,74 Kpa dan terkecil pada variasi campuran B sebesar 189,81 Kpa. Sedangkan produk api paling unggul ditunjukkan pada variasi campuran C dengan luas penampang api 48.3 cm2, didominasi warna api biru 75.56%. Sehingga diketahui efektifitas rasio campuran bahan terbaik di pengaruhi oleh rasio bahan limbah kotoran sapi hal ini disebapkan oleh kandungan CH4 dari kotoran sapi lebih besar dibandingkan dengan limbah pohon pisang..Kata kunci: limbah, pohon pisang, kotoran sapi, biogas, efektifitas
Kalibrasi Pompa Injeksi Tipe In-Line Dalam Persamaan Volume Bahan Bakar Motor Diesel 4 Silinder Hasrul Efendi; Adi Pratama Putra; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 6 No 1 (2021): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v6i1.1150

Abstract

Injector is an important component in the diesel engine fuel injection system. This study aims to obtain the results of the in-line type injection pump calibration in the equation of the fuel volume of a 4 cylinder diesel motor. The research was conducted by making simple calibration equipment. Experiments were carried out for 200-300 rpm, 350-450 rpm and 550-600 rpm experimental apparatus rotation speed. Measurements are made for the volume of fuel using a measuring cup. Injection pump calibration is done by loosening the lock on the sleeve then sliding the sleeve to the left or right on each plunger to get fuel volume similarity. The results of data collection before calibration showed the volume of fuel was 26 ml, 30 ml, 30 ml, and 28 ml. Keywords: calibration, injecton pump, in-line, diesel engine
Studi Pengaruh Kecepatan Motor Dan Jumlah Bilah Pisau Terhadap Hasil Potongan Rumput Hendra Widiyantoro; Ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 6 No 1 (2021): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v6i1.1151

Abstract

Unwanted grass growth on land will cause problems for humans. Generally, the sickle is a tool that is often used to cut grass. The use of a sickle has several disadvantages, namely using manual labor, in some cases there is a narrow-angle that makes it impossible to cut with a sickle. This study uses variations of 2, 3, and 4 blades with motor rotation speeds of 666 RPM, 1713 RPM, and 3454 RPM. The data collection method is done by determining the mass of grass by 25 grams, then the grass is arranged and moved closer to the blade with a cutting time of 10 seconds. The shortest cut grass results were obtained on the number of blades 4 with a motor rotation speed of 3454 RPM, which is 10.92 mm. The difference in mass of grass clippings in the variation of blade 4 with RPM 1 and 3, which is 4 grams, indicates the overall cut grass Keywords: blade, motor rotation speed, grass cutted
Pengaruh Prosentase Kepekatan Kaca Film Terhadap Distribusi Termal dan Pencahayaan Kabin Kendaraan Aris Nur Setya Budi; Ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 6 No 1 (2021): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v6i1.1293

Abstract

Window film is a thin layer on car glass that functions as a medium for repelling sunlight. This study aims to determine the effect of percentage of window film density on the thermal and lighting distribution of the vehicle cabin. This research was conducted using a room model measuring 50x50x30 cm. The variation of window film uses two brands of Ultima and 3M, with the respective percentages of 40% and 60%. When the experiment was carried out in an open space, the irradiation process was carried out for 2 hours using the sun's rays at 11.00 - 13.00 WIB in each variation. Temperature measurement uses a digital thermometer on the surface of the coated glass (T1) and indoors (T2), while the measurement of light intensity uses a lux meter that is placed outdoors (I1) and indoors (I2). Data analysis using the equations of temperature rate and effectiveness of heat and light reduction. The results showed that the difference in the percentage of glass film density affected the rate of heat transfer and the intensity of the light entering the room. The heat transfer rate tends to increase in Q1 with a value of 58375.61 joules, and decrease in Q2 with a value of 1160.46 joules in the variation of 3M glass film brands with a 60% concentration level. Meanwhile, the average temperature increase rate is 0.002 ℃ / minute for all variations of window film brands with a light intensity of 0.007 - 0.008 lux. Keywords : window film, temperature rate, light intensity, heat transfer.
Pengaruh Jarak Kerapatan Penghalang Spiral Terhadap Unjuk Kerja Kolektor Surya Tipe Plat Datar Dody Prasetiyo Guritno; ikhwanul Qiram; Dewi Sartika
Virtual of Mechanical Engineering Article Vol 3 No 1 (2018)
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

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Abstract

The solar collector is a device that serves to collect solar radiation and convert it into useful energy of calories. Solar water heater collectors are heat exchangers that convert solar radiation energy into thermal energy in water. This research is done by modifying the existing pipe in the solar collector, wherein the pipe is given a barrier in the form of a spiral stainless wire with the difference of size that is 0.5 cm, 1 cm, and 2 cm. This study was conducted for nine days. The result of this research proved that the distance of the spiral barrier in solar collector has an effect on efficiency, the smaller spiral barrier distance makes the collector efficiency increases. It’s caused by the flow of water fluid in the pipe collided with the spiral shaft and formed following the spiral groove so as to increase the water temperature difference higher, with the higher water temperature difference then the value of solar energy useful solar collector increases. The increased heat energy is useful to the efficiency of solar collectors, where the efficiency of collectors will increase as well. The discharge flow also affects the collector efficiency, the more greater the rate of water flow, the collector's efficiency will decrease. It’s because the residence time of water in the heating pipe is shorter and the mass flow rate is greater. Furthermore, the value of solar energy useful solar collector is getting down so that collector efficiency is getting down anyway. The maximum collector efficiency occurs at a 0.5 cm spiral barrier distance with 1 liter / minute water discharge of 24.72%, while minimum efficiency occurs at 2 cm spiral barrier distance with water discharge of 3 liters/ minute that is 11.75%.
Co-Authors Adi Pratama Putra Ahmad Lazim Rosyid Ani Santi Lestari Ani Santi Lestari Aris Nur Setya Budi Asrul Ainun Najah Charis Fathul Hadi Dody Prasetiyo Guritno Eko Malis Hasrul Efendi Hendra Widiyantoro Ikhwanul Qiram Sahrul Al Husaini