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All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika Humanis : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Pendidikan Matematika Jurnal Daya Matematis Jurnal Rekayasa Mesin BANGUN REKAPRIMA Journal of Islamic Architecture International Journal for Educational and Vocational Studies JGISE-Journal of Geospatial Information Science and Engineering Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika CLLiENT (CULTURE, LITERATURE, LINGUISTICS, ENGLISH TEACHING) Journal of Research in Social Science and Humanities Eksergi: Jurnal Teknik Energi Pedagogy : Jurnal Pendidikan Matematika Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) E-JRM Jurnal Kajian dan Terapan Matematika TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Jurnal Hasil-Hasil Pengabdian dan Pemberdayaan Masyarakat (JHP2M) Issues in Mathematics Educations (IMED) Jurnal Kemitraan, Kewirausahaan dan Pengabdian Masyarakat
Sahid Sahid
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Religion Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Performance Characteristics of Savonius Wind Turbines With Variations Air Gaps in Supporting the Development of Renewable Energy Hermawan, Baktiyar Mei; Sumarno, F. Gatot; Prasetyo, Totok; Sahid, Sahid; Roihatin, Anis; Aulia, Nur Fatowil; Surindra, M. Denny; Mulyono, Mulyono; Sofiani, Gizella; Putri, Tania Prameswari; Ariyanto, Wahyu
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4252

Abstract

To overcome the occurrence of an energy crisis in the future, an innovation / invention of energy that is environmentally friendly and energy sources will not run out in the future. Energy sources that are environmentally friendly and their potential when developed is very large, one of which is energy sources derived from wind energy. This study aims to determine the effect of wind speed on the performance of wind turbines. To find out the performance characteristics of wind turbines with variations in air gaps. The research method begins with the design / design of the wind turbine, then continues the manufacturing stage, the assembling and installation stage, the testing of tools and analysis, the tests carried out include testing the performance characteristics of the wind turbine. The parameters measured in this study are rotation, torque as well as calculating the kinetic power produced, TSR and CP. The test results conducted showed that the 200 mm air gap Savonius wind turbine with a value of CP = 0.02480-0.15658 had optimum work at low wind speeds (4 m / s). Meanwhile, the 170 mm airborne Savonius wind turbine with a value of CP = 0.00593-0.14668 has optimum work at high wind speeds (8 m / s to 9 m / s). Keywords- wind turbine savonius, air gap, coefficent of power.
Experimental Study Of The Performance Of A 5-Bladed Horizontal Axis Wind Turbine Of NACA 4415 Profile Using Winglets With Winglet Height Variation Mustofa, Rida; Sahid, Sahid; Adiprimaswara, Michael Putra Narendra; Aukad, Muhamad; Pratiwi, Okta Ayu; Sulistyoningtyas, Dian Lestari
Eksergi Vol. 20 No. 02 (2024): MAY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i02.5803

Abstract

Horizontal axis wind turbine is one type ofturbine used to convert wind energy into mechanical energy. Thepurpose of this research is to design, manufacture, test andanalyze the performance of horizontal shaft wind turbine NACA4415 airfoil blades that do not use winglets with those that usewinglet height variations. The stages of this research includepreparation of literature search, planning and making NACA4415 airfoil blades both using winglets and not using winglets,assembling test equipment and assembling wind turbineinstallations, testing and taking wind turbine performance data,data processing and analysis, final results. The turbine diameterused is 1.1m with a blade thickness of 18 mm and a chord lengthof 38mm. Tests were carried out with winglet height testvariables of 5%, 7%, 9%, and 11% of the rotor length at windspeeds of 4 m/s, 6 m/s, 8 m/s and 10 m/s. The test results showthat the NACA 4415 airfoil horizontal shaft wind turbine usinga winglet with a height of 7% has optimum performance at 4 m/sand 6 m/s with efficiencies of 23.68% and 8.75%, respectively,while when the wind speed is 8 m/s and 10 m/s the optimumturbine performance is achieved when using a 9% winglet withefficiencies of 6.12% and 3.64%, respectively. The mostoptimum turbine performance improvement is achieved whenusing a 7% winglet with an efficiency increase of 204.76% at awind speed test of 4 m/s. Keywords”” HAWT,
Performance Analysis of H-Type Darrieus Turbine Radial Projection Blades Based on NACA 0018 Sahid, Sahid; Mulyono, Mulyono; Arif Fauzi, Dhiyaulhaq
Eksergi Vol. 20 No. 02 (2024): MAY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i02.5806

Abstract

The H-type Darrieus turbine is a vertical windturbine that is used to convert wind energy into mechanicalenergy by utilizing lift force. This research is aimed at making amodified H-type Darrieus turbine blade model from a NACA0018 profile blade to a NACA 0018 blade with a chordlineprojected radially to the turbine diameter and the second resultis to compare the performance of the NACA 0018-based radialprojection blade to the performance of the NACA 0018 blade.This is preparation for searching literature, design making,manufacture of NACA 0018 blade test specimens and NACA0018 based radial shadow blades, assembly and installation oftest equipment, testing and data collection of wind turbineperformance, data processing and analysis, final results. Thevariables tested were wind speeds of 7 m/s, 8 m/s, 9 m/s, 10 m/s,11 m/s, 12 m/s. The test results show that the higher the TSR, thehigher the resulting power coefficient (Cp) until the maximumCp is reached. After that, the increasing TSR, the resulting Cp isgetting smaller. The test results show that projection bladesbased on NACA 0018 and NACA 0018 blades produce a smallmaximum Cp, respectively 0.082 and 0.124 compared to theDarrieus turbine maximum Cp reference on the vertical turbinecharacteristic chart, which is 0.4. The NACA 0018-based radialprojection produces a lower Cp than the NACA 0018 blade atspeeds of 7 m/s, 8 m/s, 10 m/s, 11 m/s, 12 m/s. At a wind speed of9 m/s the projection blade based on NACA 0018 produces ahigher power coefficient than the NACA 0018 blade. Projectingthe NACA 0018 blade chordline on the track causes the bladecross-sectional area and chordline length to shrink. The higherthe wind speed, the smaller the resulting Cp. The solidwallphenomenon affects turbine performance. Testing without loadat all wind speeds, the projection blade based on NACA 0018produces higher rotation than the NACA 0018 blade. Theparameter of the blade momentum affects the results of theturbine rotation when tested without load.
Experimental Study of the Performance of a Horizontal Axis Wind Turbine with A Flat Taper Type of 4:5 and an Outer Angle of 25° With Variations in The Number of Blades Anandia, Faranita Putri; Sahid, Sahid; Roihatin, Anis
Eksergi Vol. 21 No. 03 (2025): SEPTEMBER 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i03.7110

Abstract

This experimental study investigates the performance of a Horizontal Axis Wind Turbine (HAWT) with a flat taper 4:5 blade design and a 25° exit angle, focusing on the effect of varying the number of blades (6, 9, and 12). The turbine, with a diameter of 1.1 m and blade dimensions of 470 mm length, 110 mm top width, and 137 mm bottom width, was tested at wind speeds of 3 m/s, 5 m/s, 7 m/s, and 9 m/s in a laboratory setting. Parameters such as wind speed, turbine rotation, voltage, and current were measured to analyze system efficiency. The results indicate that blade count and wind speed significantly influence efficiency. The highest efficiency of 12.51% was achieved at 3 m/s with 9 blades, while at 5 m/s, the efficiency peaked at 3.95% with 9 blades. For higher wind speeds (7 m/s and 9 m/s), the optimal efficiency decreased to 2.03% and 0.95%, respectively, both achieved with 6 blades. The study concludes that this turbine design is most effective at low wind speeds (≤5 m/s), making it suitable for regions with similar wind conditions, such as Indonesia. The findings contribute to optimizing blade configurations for small-scale wind energy applications.
Horizontal Axis Wind Turbine Efficiency Optimization Through Tip Radius Modification on 4:5 Flat Taper Blades Sahid, Sahid; Anandia, Faranita Putri; Wattimena, Christopher Johanes Edsel; Pratiwi, Okta Ayu; Tantri, Riris Annisa Tarra; Barid, Muhammad
Eksergi Vol. 21 No. 03 (2025): SEPTEMBER 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i03.7112

Abstract

This study aims to investigate how changing the roundness of the back edge of blades affects a 4:5 flat taper wind turbine. Tests used blades with 5 mm, 10 mm, and 15 mm rounded edges, compared to a 5 mm notched blade, across wind speeds from 3 to 9 m/s. The results show the 5 mm rounded edge works best at low wind speeds, with an efficiency of 11.12% at 3 m/s. At higher wind velocities, the 15 mm rounded blade demonstrated superior aerodynamic performance, attaining an efficiency of 1.63% at 7 m/s. The rounded trailing edge improved aerodynamic behavior by minimizing turbulence and enhancing flow stability. Therefore, the optimal edge radius should be determined based on regional wind characteristics, especially for low-speed wind zones typical of Indonesia
Co-Authors Abdul Rahman Achmad Widodo Adiprimaswara, Michael Putra Narendra Afsari, Ayudya Ahmad Zaki Aldyfra Luhulima Lukman Alfauzi, Abdul Syukur Alfiatul Maulida, Alfiatul Alyasa, Moh. Fani Anandia, Faranita Putri Andi Wahyudi Anis Roihatin Arif Fauzi, Dhiyaulhaq Ariyanto, Wahyu Arrahman, Friendika Alif Asferizal, Ferial Atthariq, Luthfi Aryananda Aukad, Muhamad Aulia, Nur Fatowil Badaruddin, Sukri Barid, Muhammad Bernard Bernard, Bernard Darlan, Armayanti Devi, Yunida Djam'an, Nurwati Dwiana Hendrawati F. Gatot Sumarno, F. Gatot Fahmi, Aziz Fauziah, Selma Nurul Ferial, Asferizal Gatot Yulianto Hassan, Muhammad Nasiru Hermawan, Baktiyar Mei Indrarani, Indri Astrina Fitria Kusriyah, Ainun Jariyah Dewi Kuswari Hernawati M Gilang Indra Mardika Maulani, Choirunnisa Prilya Maulidina, Fathiya Nur Miftachul Huda Mochammad Denny Surindra Muhammad Ammar Naufal Muhammad Rifki Mulyono Mulyono Munawwaroh, Dita Anies Musdalifah Musdalifah Mustofa, Rida Mutmainnah, Fakhirah Nadia, Aulia Nana Putri Yanto Nasir, Nur Anisa Nur Sakinah Nurdin Arsyad, Nurdin Nurfadilla, Nurfadilla Nurhaliza, Ratih Nurhidayah Nurhidayah Nurjannah Nurjannah Nursadi, Nursadi Pratiwi, Okta Ayu Putri, Tania Prameswari Rahma Yanda Rahma, Nur Ratna Tri Hardaningtyas, Ratna Tri Risal Rinofah, Risal Rofik, Abdur Rosidah Rosidah Sa'diyyah, Fadhilah Nur Safaruddin, Yanuar Mahfudz Safarudin, Yanuar Mahfud Safitri, Ayuun Saputri, Sukma Ajeng Damar Sari, Shaufa Salsabila Sofiani, Gizella Sri Andayani Sufia, Sufia Sugeng Widada Sulistyoningtyas, Dian Lestari Supriyo Supriyo Syukry, Zein Akbar T., Mar Athul Wazithah Tantri, Riris Annisa Tarra Totok Prasetyo Udi Harmoko Usman Mulbar Utomo, Bagus Wahyu Wattimena, Christopher Johanes Edsel Wiedad, Diyaulhaq Wildana Wildana, Wildana Wulandari, Reski Yusuf Dewantoro Herlambang