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Achdi, Endang
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SAVING ELECTRICITY ON NORMAL AND HOT WATER DISPENSERS BY INSULATING THE HEATING TUBE USING GLASS WOOL Achdi, Endang; Soemantri, Herman; Marpudin, Asep
Mestro: Jurnal Teknik Mesin dan Elektro Vol 5 No 02 (2023): Edisi Desember
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v5i02.464

Abstract

Efforts to apply science and technology are very important, namely improving the welfare of the wide community. The water dispenser is a household electronic item that many people like because it is practical to use. The water dispenser has a main part, namely a heating tube which functions as a heater and a container for storing hot water. This heating tube has an electric heating element of around 400 - 500 W. In the water dispenser, the heating tube is open to the air, resulting in heat loss. Because the source of heating energy comes from electrical energy, saving efforts need to be made. In this research, modification efforts were made, namely by covering the surface of the heating tube using a heat insulating material, namely glass wool. The next step is testing the dispenser before and after modification. The test includes observing the duration of time required from normal water temperature to hot water temperature and from the heater not turning on until it turns on again. Analysis of the test results data is then carried out to obtain the performance of the water dispenser. Based on the results of the analysis, electricity consumption for one water dispenser unit after modification was 11.7 kWh/month and before modification 36.8 kWh/month. Thus, modifying the water dispenser by covering the surface of the heating tube with glass wool can reduce electricity consumption by around 25 kWh/month.
Performance Testing of Cross Wind Turbine Model with Capacity of 10 W Achdi, Endang; Sonawan, Hery; Setiadi, Yudi
Mestro: Jurnal Teknik Mesin dan Elektro Vol 6 No 01 (2024): Edisi Juni
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v6i01.527

Abstract

Wind is a significant potential renewable energy source for electricity generation. Currently, there are two commonly used types of wind turbines: horizontal-axis and vertical-axis wind turbines. Both types are designed to harness the energy from horizontally moving wind. However, in reality, wind often moves erratically, especially in urban areas with tall buildings. To address this, a cross-axis wind turbine model has been developed to capture energy from randomly moving wind. This turbine model has 10 horizontal blades and 5 vertical blades. Previously, performance testing of this wind turbine model used a 60 W capacity dynamometer generator, but the wind turbine's output power didn't reach the required high torque and rotational speed. In this research, a 40 W capacity generator was used to resolve the previous issues. The parameters measured in this testing include wind speed, turbine rotational speed, voltage, and current. The testing was conducted at wind speeds of 5.3 m/s, 5.8 m/s, 6.3 m/s, and 6.8 m/s, with variations in the blade pitch angles set at 20°, 25°, and 30°. The results of the testing and analysis showed that the maximum performance coefficient of this wind turbine was 7.54%, achieved at a wind speed of 6.3 m/s with a blade pitch angle of 25° and a tip speed ratio of 1,08. The higher the wind speed, the shorter the time required to reach a constant rotational speed. At a wind speed of 6.3 m/s with a blade pitch angle of 25°, it took 30 seconds to reach a constant rotational speed.
Improving cross-axis wind turbine performance: A Lab-scale investigation of rotor size and blades number Achdi, Endang; Kiono, Berkah Fajar Tamtomo; Winoto, Sonny Handojo; Facta, Mochammmad
Mechanical Engineering for Society and Industry Vol 4 No 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.10837

Abstract

Horizontal and vertical-axis wind turbines have long been used to generate electricity in open areas by utilizing horizontal wind flow. Under certain conditions, for example in multi-storey building areas, wind flows not only from horizontal but also vertical directions. Therefore, this research aims to develop a new turbine model known as a cross-axis to capture wind flow from horizontal and vertical directions around multi-storey buildings. Design, production, testing, and performance analysis are carried out in this project. The model is designed with a rotor diameter of 700 mm which has 5 vertical blades and 10 horizontal blades with a total height of 600 mm which is divided into two configurations, upper and lower. Performance analysis was carried out using a wind tunnel in a conditioned laboratory both in loaded and unloaded conditions. The output power of the wind turbine is measured using an electric dynamometer. The no-load test was applied to determine the time required to move from non-rotating to constant rotation at different speeds and horizontal blade angles. Meanwhile, the load test is used to determine the power coefficient at various speeds, horizontal blade pitch angles, and loads. The research results show that the time required to move from a non-rotating speed to a constant speed is influenced by the wind speed and the blade pitch angle. The power coefficient was also observed to be influenced by wind speed, blade pitch angle, and load. Furthermore, the shortest time to reach a constant rotation speed is around 20 seconds at a wind speed of 7.6 m/s and a blade pitch angle of 25°. The maximum power coefficient of the wind turbine was obtained at 5.2% at a wind speed of 7.6 m/s, blade pitch angle of 25°, and tip speed ratio of 0.5.
Model Design of Helical Type Vertical Shaft Wind Turbine with Capacity of 5 W Achdi, Endang; Syahbardia, Syahbardia; Rusdianto, Fadhilah Fahmi
Mestro: Jurnal Teknik Mesin dan Elektro Vol 5 No 1 (2023): Edisi Juni
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v5i1.399

Abstract

A vertical axis wind turbine (VAWT) is a power generator that uses wind power to generate torque. The VAWT can be pointed in any direction, meaning it doesn't need to be pointed into the wind to generate power. Thus, there is potential for large power plants using VAWTs as their size can be significantly increased. However, there are also some drawbacks to the VAWT. VAWT has the characteristics of self-starting. But still, an additional power source is needed to start the turbine rotation until a certain rotation speed is reached or it must operate at high wind speeds. The main objective of our work is to create a 5 W VAWT model (helical type) to optimize self-starting of vertical axis wind turbines. The outline of this report is regarding the design of our VAWT model, which will have self-starting characteristics. To increase the self-starting status, our efforts are to optimize the type, dimensions and material of the turbine blades. We also optimized the rotor dimensions. As a result, a model helical three-blade turbine was built and tested. The blade turbine made of composites has been balanced with the rotor prior to testing. The test uses 2 fans with a speed of 3-5m/s, the test is carried out to obtain wind turbine performance data.
Railway Bogie Side Frame Strength Analysis Achdi, Endang; Rizayana, Farid; Septian, Reza Nur
Mestro: Jurnal Teknik Mesin dan Elektro Vol 6 No 03 (2024): Edisi Desember
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v6i03.588

Abstract

Train is one of the transportations which highly in great demand of people around the world, particularly in Indonesia. The train is expected to be one of the solutions to solve transportation’s problems in Indonesia. Train should fulfill the existing regulation one of them is the structural strengths in resisting static loads that is the loads that can’t change over time, In order to ensure the passengers safety and comfort. The analysis of the train bogie frame begins with gathering the information regarding the model, specification, and formulation of various loading cases, and finite element modeling. The result shows that in the bogie frame, the maximum stress that occurs is 20.5 MPa for the static load category with axial direction. This occurs below the permissible stress of 183.75 MPa. It can be concluded that the stress works below the permitted stress by the material SS400. Therefore, the operation of bogie with static load is in a safe condition.
Co-Authors Berkah Fajar Tamtomo kiono Facta, Mochammmad Farid Rizayana Hery Sonawan Marpudin, Asep Rusdianto, Fadhilah Fahmi Septian, Reza Nur Soemantri, Herman Syahbardia, Syahbardia Winoto, Sonny Handojo Yudi Setiadi