KERAMIK (ADVANCE CERAMICS) SEBAGAI MATERIAL ALTERNATIF DI BIDANG KESEHATAN

Ceramics are non-metal material and are able to meet in daily activities. Generally, ceramic have superior high temperature strength, higher hardness, lower density and lower thermal conductivity than metal. The disadvantages of ceramics as structural materials are flaws, such as cracks, voids, and inclusions. In development of ceramics can be used in medical field for instance, implant of bone or tissue of the body. Hydroaxyapatite (HAp) is one of ceramics that is applied in medical field. In natural resources HAp is easy to find in every place in the world. The advantage of ceramics is bio- comfortable and disadvantages is poor fatigue properties, this material cannot be used in bulk form fro load bearing application such as orthopedics

PENENTUAN KARAKTERISTIK MEKANIK MOTOR LISTRIK INDUKSI MENGGUNAKAN BEBAN DINAMOMETER HIDROLIK

Penelitian ini memiliki tujuan umum untuk mendapatkan metode untuk mengetahui karakteristik mekanik  motor listrik induksi. Eksperimen dilakukan dengan memberikan beban kepada motor listrik uji menggunakan dinamometer yang bekerja secara hidrolik. Target khusus yang  hendak dicapai melalui penelitian ini adalah panduan pengoperasian  motor listrik induksi. Hal ini berguna bagi pengguna agar dapat mengoperasikan motor listrik secara efisien dan aman serta motor listrik memiliki usia pakai yang lebih lama. Metode penelitian yang dipergunakan adalah kaji Eksperimental dengan obyek pengujian satu unit motor lisrik Induksi dengan daya 1 Hp menggunakan listrik AC 220 Volt. Pembebanan dipergunakan pompa hidrolik yang dilengkapi dengan katup pengatur beban. Instrumen yang akan dilibatkan antara lain: tachometer, indicator gaya serta lengan momen. Untuk menjamin stabilitas kerja obyek penelitian, maka pada lengan momen juga dilengkapi komponen peredam kejut. Data-data yang dihasilkan adalah putaran poros serta momen torsi yang selanjutnya dipakai untuk menghitung daya mekanik obyek pengudalajian. Variasi data pengujian dilakukan dengan cara mengatur pembukaan katup pada dinamometer hidrolik. Data-data selanjutnya, secara statistik, dianalisis untuk mendapatkan kondisi kerja optimum dari obyek penelitian. Luaran penelitian antara lain artikel ilmiah yang akan dipublikasikan melalui jurnal nasional. Perangkat keras serta prosedur pengujian akan dijadikan modul ajar pada mata kuliah Mesin Konversi Energi untuk mahasiswa jurusan Teknik Mesin dan Teknik Energi Politeknik Negeri Sriwijaya. Dari data eksperimen, analisis statistik serta analisis kurva karakteristik diperoleh kesimpulan:-   Fungsi pendektan polynomial rodo 2 : Y = 0,000121 X2 + 0,183 X+0,582-   Koefisien Regresi, R2 = 0,983Dengan metede: turunan pertama  diperoleh :-   Daya Mekanik Optimum, Pm, opt = 756 Watt  dan-   Efisiensi maksimum, ηmaks = 69,8 %Dengan interpolasi antar data-data  dioperoleh :-   Putaran Optimum motor listrik, n0pt = 2791 rpm-   Arus optimum  motor listrik, I0pt m = 5,6 Amper

PENGARUH PENAMBAHAN KOMPONEN SUPER CHARGER PADA MOTOR BENSIN

Super charger yang dimaksud pada penelitian ini adalah suatu perangkat keras yang berfungsi untuk menaikan tekanan udara memasuki intake manifold motor bakar torak. Tujuan modifikasi ini adalah untuk meningkatan prestasi mesin. Obyek penelitian adalah satu unit motor bensin 2 langkah dengan kapasitas mesin 25 cc.  Kegiatan penelitian ini akan menghasilkan perangkat keras yang dapat dioperasikan oleh mahasiswa maupun staf pengajar sebagai kegiatan praktikum maupun alat bantu mengajar (teaching aid). Penelitian ini menghasilkan juga perangkat lunak, berupa panduan/prosedur pengoperasian Super charger serta spesifikasi teknik dari prototipe mesin. Data dan konsep yang dihasilkan dari penelitian diharapkan dapat dijadikan acuan (referensi) untuk kegiatan penelitian lanjutan untuk mahasiswa maupun staf yang berminat untuk mengembangkan topik penelitian yang sejenis. Dari eksperimen serta analisis data diperoleh beberapa kesimpulan, antara lain:Ada dampak signifikan berkaitan dengan penembahan komponen super charger terhadap perubahan perfomansi motor bensin.Kondisi optimum yang dihasilkan antara lain :Daya maksimum mesin, BHPmax = 792 WattTekanan udara optimum, P0pt = 24 mm.HgPutaran Optimum mesin, Nopt = 8425 rpmPeningkatan Daya mesin sebesar 9,69 %

PERANCANGAN TURBIN ANGIN SUMBU VERTIKAL SEBAGAI PEMBANGKIT LISTRIK (SKALA LABORATORIUM)

Wind is one of the newest energy sources that is becoming increasingly popular nowadays. The use of wind energy can be converted into electrical energy for wind turbine cells. However, there are two types of wind turbines, namely horizontal and vertical. Holistic wind turbines are usually used in one direction while vertical wind turbines are used in all directions. The shape of the blades and the number of wind turbine blades greatly influence the power produced. So the research this time is to find out the influence of the blade shape that has been varied and the number of blades with wind speeds of 2.5 m/s, 3 m/s, 3.5 m/s and 4 m/s on the resulting generator power so that the efficiency results What has been obtained can be designed to design wind turbines with varied blade shapes. Testing was carried out in a laboratory designed independently with a wind source using a fan and Dimmelr air conditioner. The results of tests that have been carried out have the highest gelnelratolr power known at 4 blades with a wind speed of 4 m/s with a power value of 0.34 watts while the smallest gelnelratolr power is known at 2 blades with a wind speed of 2.5 m/s with rated power 0.04 Watt. So that the research results from all the tests, the highest efficiency value was obtained at 4 blades with a wind speed of 2.5 m/s with a value of 24.4% and the lowest efficiency value was obtained at 2 blades with a wind speed of 3 m/s 6, 4 %.Wind is one of the newest energy sources that is becoming increasingly popular nowadays. The use of wind energy can be converted into electrical energy for wind turbine cells. However, there are two types of wind turbines, namely horizontal and vertical. Holistic wind turbines are usually used in one direction while vertical wind turbines are used in all directions. The shape of the blades and the number of wind turbine blades greatly influence the power produced. So the research this time is to find out the influence of the blade shape that has been varied and the number of blades with wind speeds of 2.5 m/s, 3 m/s, 3.5 m/s and 4 m/s on the resulting generator power so that the efficiency results What has been obtained can be designed to design wind turbines with varied blade shapes. Testing was carried out in a laboratory designed independently with a wind source using a fan and Dimmelr air conditioner. The results of tests that have been carried out have the highest gelnelratolr power known at 4 blades with a wind speed of 4 m/s with a power value of 0.34 watts while the smallest gelnelratolr power is known at 2 blades with a wind speed of 2.5 m/s with rated power 0.04 Watt. So that the research results from all the tests, the highest efficiency value was obtained at 4 blades with a wind speed of 2.5 m/s with a value of 24.4% and the lowest efficiency value was obtained at 2 blades with a wind speed of 3 m/s 6, 4 %

PENGARUH DIAMETER PIPA DAN LUBANG BAKAR PADA TUNGKU PEMBAKARAN TEMPURUNG KELAPA DENGAN METODE PIROLISIS

Coconut shell charcoal is a product obtained from imperfect combustion of coconut shells causing complex carbon compounds not to oxidize into carbon dioxide. This event is pyrolysis. This study aims to determine the influence of pipe diameter parameters and burn hole diameter on water content and ash content of coconut shell charcoal which test specimens are made using pyrolysis method combustion furnace. The test result data was analyzed using ANOVA with 2 FI full factorial design, using 2 factors and 2 responses modeled by Design-Expert (Trial) software. The results of the analysis revealed that the main factor that most influenced the moisture content and ash content of the test specimen was the pipe diameter factor. The contribution of the influence of pipe diameter on water content is 47% and the contribution of pipe diameter influence to ash content of 56%

PERANCANGAN TURBIN ANGIN SUMBU VERTIKAL SEBAGAI PEMBANGKIT LISTRIK (SKALA LABORATORIUM)

<p><i>Wind is one of the newest energy sources that is becoming increasingly popular nowadays. The use of wind energy can be converted into electrical energy for wind turbine cells. However, there are two types of wind turbines, namely horizontal and vertical. Holistic wind turbines are usually used in one direction while vertical wind turbines are used in all directions. The shape of the blades and the number of wind turbine blades greatly influence the power produced. So the research this time is to find out the influence of the blade shape that has been varied and the number of blades with wind speeds of 2.5 m/s, 3 m/s, 3.5 m/s and 4 m/s on the resulting generator power so that the efficiency results What has been obtained can be designed to design wind turbines with varied blade shapes. Testing was carried out in a laboratory designed independently with a wind source using a fan and Dimmelr air conditioner. The results of tests that have been carried out have the highest gelnelratolr power known at 4 blades with a wind speed of 4 m/s with a power value of 0.34 watts while the smallest gelnelratolr power is known at 2 blades with a wind speed of 2.5 m/s with rated power 0.04 Watt. So that the research results from all the tests, the highest efficiency value was obtained at 4 blades with a wind speed of 2.5 m/s with a value of 24.4% and the lowest efficiency value was obtained at 2 blades with a wind speed of 3 m/s 6, 4 %.</i></p&gt