Technical specification of the spinner at the Pilot Plant of FTIP Unpad was needed to be reviewed through technical analysis and performance test. Experimental Design method of the research was carried out by on the spot observations, measurements, and recalculating machine main components. Results obtained from technical analysis showed that the machine required a driven power of 216 W, one single belt, a minimum shaft diameter of 16 mm, as well as a pin diameter at the main roller and at the pulley of 5,46 mm and 6 mm, respectively. It had a deflection torsion of 0,0460 a critical shaft speed of 1338 RPM, a bearing life of 3.227.817,96 hours, a frame deflection of 0,24 mm, and a frame welding load of 503,74 N. Sofar, the machine has fulfilled its technical feasibility. While the results of performance tests showed that the best taste sensation of the crackers was termed at an engine speed of 650 rpm at an actual capacity of 3.6 kg/h and at a power of 120 W, a specific spin energy of 120 kJ/kg, a spin yield of 97.38 %, an engine efficiency of 65.60 %, an engine performance index of 0.95 at a level of noissiness of 86.86 dBA. The data has fulfilled the performance requirement, but due to its vibration frequency of 21.44 mm/s – which was dangerous, improvements related to it had to be done. Keywords: technical analysis, oil spinner, performance test ABSTRAK Spesifikasi teknis mesin peniris minyak (spinner) di laboratorium Pilot Plant FTIP UNPAD perlu dikaji-ulang melalui analisis teknik dan uji kinerja. Metode analisis deskriptif dalam penelitian ini dilakukan melalui pengukuran, pengamatan dan perhitungan terhadap komponen-komponen utama mesin. Hasil analisis teknik menunjukkan bahwa untuk mengoperasikan mesin ini dibutuhkan daya penggerak 216 Watt, satu sabuk, diameter poros minimum 16 mm, defleksi puntiran 0,0460, putaran kritis poros 1338 RPM, diameter pin pada motor penggerak 5,46 mm, diameter pin pada roll utama dan diameter puli 6 mm. Sementara umur bantalan 3.227 jam, lendutan rangka 0,24 mm, dan beban las rangka 503,74 N. Secara teknis mesin ini telah memenuhi kelayakan teknis. Hasil uji kinerja mesin menunjukkan bahwa sensasi rasa kerupuk terbaik diperoleh pada kecepatan putaran motor 650 RPM dengan kapasitas aktual 3,6 kg/jam pada daya 120 Watt, energi spesifik penirisan 120 kJ/kg, rendemen penirisan 97,376 %, efisiensi mesin 65,60 %, indeks performansi mesin 0,95, dan tingkat kebisingan 86,86 dBA. Data ini telah memenuhi spesifikasi kinerjanya. Namun dengan frekuensi getaran 21,44 mm/s (berbahaya). Perbaikan teknis terkait masalah ini masih perlu dilakukan. Kata kunci: analisis teknik, mesin peniris minyak, uji kinerja
Soil fertility is the ability of soil to supply nutrient for the plant. The availability of nutrients in the soil is one of factors to support the success of plant growth. The addition of corn cob biochar enriched with ammonium sulfate increases the availability of nutrients in the soil. Soil conditioner is a natural compound that can improve soil fertility so it can support the plant growth. The treatments tested were the application of corn cob biochar enriched with ammonium sulfate, fertilizers, and manure. The doses of fertilizers were 120 g Urea plot-1 , 240 g TSP plot-1 , 160 g KCl plot-1 , 5 kg manure plot-1 , 8 kg corn cob biochar plot-1 , and the addition of ammonium sulfate in corn cob biochar of 8 kg plot-1. The parameters observed were soil aggregate stability, pH, C-organic, CEC, and total-N. Plant growth was measured based on plant height and leaf. The results showed that biochar treatment with ammonium sulfate had the best outcome and was able to improve soil aggregate stability up to 56%, pH 14%, C-organic 24.8%, CEC 57%, and total-N up to 18%. Besides, this treatment had the best result to the plant height in second week up to 50%, forth week 20%, sixth week 42%, eight weeks 46% and tenth week 40%. Enhancement of total leaf was up to 37% in second week, 22% in fourth week, 44% in sixth week, 35% in eighth week and 29% in tenth week.
The effect of the project-based learning model (pjbl) assisted with photonovela on the learning outcomes of students in class x ma bustanul „ulum jayasakti in 2018/2019. The Fotonovela Project-Based Learning (PjBL) learning model is very suitable to be applied in learning economics because it is not enough to study and memorize economic concepts but it also requires an understanding and ability to solve economic problems properly. Through this learning model students can express their thoughts, exchange opinions, cooperate with each other if there are friends in the group who are experiencing difficulties. Obtained information in the form of odd semester results 2019/2020. In the learning outcomes there are still many students who have not met the minimum completeness criteria, namely 75 students learning outcomes in class X IPS 1, which achieved completeness, only 6 students. While those who did not reach the completeness were 19 students. In the hypothesis test that reads "there is a positive influence on the use of the Pono Learning Method assisted by Photonovela on the learning outcomes of Class X IIS 1 Bustanul MA„ Ulum 2019/2020 ". Then the hypothesis can be said to be accepted. Said to be accepted because it can be seen from the learning outcomes that have changed in a positive direction from 5 students (22.73%), which is fairly complete, turned into 16 students (72.73%). In other words, the learning outcomes of the learning process using the Fotonovela PJBL Learning Model have a clear increase. So the use of Photonovelaassisted PPA Learning Models can be used in the learning process to improve learning outcomes, especially in Economics subjects
Temperature calibration is an activity that formed the relationship between values indicated by a measuring instrument or measuring system with the value - the value relating to the temperature scale that measured under certain conditions. A clinical thermometer is a device that doctors use to measure the temperature inside a patient's body. In the field of calibration, the suitability of medical device readings with the permissible standard values (tolerance values) is very necessary so that the readings are kept accurate. The purpose of this research is to make a digital wet media thermometer calibrator based on the ATmega32p to monitor the performance of the thermometer with a temperature setting of 35 °C – 40 °C in order to maintain its accuracy. The design of this calibrator consists of a wet heater circuit using a DS18B20 temperature sensor which is processed by a minimum ATmega328p system, then will be displayed on a 2x16 LCD. This tool is made to make it easier to calibrate the thermometer so that its accuracy is maintained. Thermometer calibration is done by comparing the module with a calibrated standard measuring instrument. The measurement of the instrument against the setting temperature has the smallest error of 0% and the largest of 0.25%. Meanwhile, the measurement of the instrument against a standard thermometer (which has been calibrated) has the smallest error value of 0% and the largest of -1.17%.
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