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Azarya Siahaan
Teknik Mesin, Fakultas Teknik Dan Pengelolaan Sumber Daya Perairan, Universitas HKBP Nommensen, Pematangsiantar, Indonesia
Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Other

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Design and Construction of A Vortex Type Turbine Driving A 100 Watt Generator Jose Mikael Saragih; Tambos A. Sianturi; Azarya Siahaan
International Journal of Technology and Education Research Vol. 4 No. 03 (2026): International Journal of Technology and Education Research (IJETER)
Publisher : International journal of technology and education research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijeter.v4i03.5346

Abstract

This study aims to describe the design and construction of a vortex-type turbine driving a 100-watt generator. The research method used is an experimental method, namely by designing, making, and testing a vortex turbine to determine the system's ability to produce 100 watts of electrical power. Based on the test results, turbines with blade angle variations of 30°, 45° and 60° at the same water discharge of 2,026L/s, it was found that the 60° blade angle produced better performance. This is shown at an angle of 60° obtaining a turbine speed of 714.882 and a hydrostatic pressure of 121,590 Pa, which is higher than an angle of 30° which obtains a turbine speed of 563.786 and a hydrostatic pressure of 121,590 and an angle of 45° which only obtains a turbine speed of 740.1 and a hydrostatic pressure of 95,245. Thus, it can be concluded that the blade angle affects turbine performance, where the 60° angle in this test is able to optimize the conversion of water energy into mechanical and electrical energy more effectively than the 30° and 45°
Design Of A Cocoa Bean Grinding Machine With 0.5 Hp Power Pramadya Ragatna Silalahi; Winfronstein Naibaho; Azarya Siahaan
International Journal of Technology and Education Research Vol. 4 No. 03 (2026): International Journal of Technology and Education Research (IJETER)
Publisher : International journal of technology and education research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijeter.v4i03.5347

Abstract

This study aims to describe the design and construction of a cocoa bean grinding machine with a power of 0.5 hp. Based on the results of the cocoa bean grinding machine performance test and simple linear regression statistical data analysis using SPSS software in Chapter IV, several conclusions can be drawn as follows: Performance and Grinding Capacity of the Machine The grinding machine has a stable performance in producing fine products at a grinding duration of 2 minutes. At a variation of 1000 grams of input load, it produces an average of 358.33 grams of fine products, a 2000 gram load produces 733.33 grams, and a 3000 gram load produces 1066.67 grams. The Effect of Material Weight on Grinding Results (Regression Analysis): Fine Results: The weight of cocoa bean input has a positive and significant effect on fine results. Every 1 gram increase in cocoa weight will increase the fine results by 0.354 grams. Coarse Results: The weight of cocoa bean input has a positive and very significant effect on coarse results. Every 1 gram increase in cocoa weight causes an increase in coarse results by 0.642 grams. This shows that the majority of additional loads will tend to increase the coarse fraction if the grinding time is limited to only 2 minutes. Unmilled Material: The weight of cocoa bean input does not significantly affect the amount of unmilled material 0.212 > 0.05. The amount of unmilled material tends to be constant at an average value of 325 to 333 grams, which indicates the existence of a certain mechanical limit/dead space in the machine's grinding chamber. Machine Noise Level: The machine operates with a high noise level, ranging from 96.6 dB to 99.5 dB, which has exceeded the safe threshold for human hearing for long duration (85 dB). Based on the regression analysis, the addition of material weight has a negative coefficient (-0.001) which means it slightly dampens the sound, but the effect of this material weight addition is statistically insignificant (0.208 > 0.05).
Co-Authors Jose Mikael Saragih Pramadya Ragatna Silalahi Tambos A. Sianturi Winfronstein Naibaho