Proksima最新文献

{"title":"Experimental study of Undershot Type Water Wheels as Picohydro Power Generators in Irrigation Channels","authors":"Asral Asral","doi":"10.31258/proksima.v1i2.12","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.12","url":null,"abstract":"The need for electrical in rural areas are continues to increase. Meanwhile, the procurement of power plants are limited and experiences many obstacles. The aim of this testing study a hydroelectric power plant in a tourism area is to provide the electricity appropriate that location by utilizing the potential of natural resources. The undershot type water wheel is used as a driving force to drive the electric generator. The resources used come from the flow of irrigation canal which is usually used to irrigate rice fields and the others needs of farmer communities. Measurements of rotation speed, electrical voltage and power produced were carried out within seven days. It is estimated that the generator can produce 75 Watts. The electricity can be utilized for lighting the entrance of tourism areas, food stalls and a residence house. To increase power production found modifications to the irrigation canals need to be considered.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"290 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the Braking System in the Gardapati Prototype Energy Saving Car","authors":"Halim Davista, Syafri Syafri, Fablil Huda, Kaspul Anuar","doi":"10.31258/proksima.v1i2.14","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.14","url":null,"abstract":"The braking system is one of the crucial components in a vehicle because braking is a vital safety feature of the vehicle. The braking system functions to reduce or slow down the speed and stop the vehicle, as well as to enable the possibility of parking the vehicle on a downward slope. The braking system under investigation is examined in the prototype vehicle called Gardapati, which employs a hydraulic brake system. Gardapati is a vehicle created by students from the University of Riau's Mechanical Engineering Department, affiliated with the UKM Selembayung, following the standard references provided by the Energy-Efficient Vehicle Competition organized by BPTI.
 This final project will involve several calculations related to the braking system, following the specifications used in the Gardapati vehicle. First, calculations will determine the dynamic braking force required (Fb) when the vehicle is moving at a speed of 50 km/h with a distance of 20 meters, as well as the static braking force (Fb) required when the vehicle is on an incline of 11.2 degrees, adjusted to the requirements and regulations of the 2023 Energy-Efficient Vehicle Competition (KMHE). Then, the braking distance will be calculated for speeds of 30, 40, and 50 km/h on dry and wet asphalt road conditions.
 From the calculation results and data analysis, it is found that the required dynamic braking force (Fb) is 510,76 N, and the static braking force (Fb) is 830,31 N. Meanwhile, the minimum braking distance is observed on dry asphalt road conditions at a speed of 30 km/h with a percentage error of 1,59 %, where the theoretical value is 5.67 m and the actual value is 5,76 m. On the other hand, the highest braking distance is observed on wet asphalt road conditions at a speed of 50 km/h with a percentage error of 7,39%, where the theoretical value is 14.47 m and the actual value is 15.54 m. Of the two road conditions, the largest percentage error occurs when testing the vehicle at speeds of 30, 40, and 50 km/h on wet asphalt conditions, amounting to 4,61%. With this level of percentage error, it can be concluded that the variation in the obtained data is relatively small, which is less than 10%.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Mechanical Behavior of Coconut Fiber Composite as an Alternative Material for Mobile Phone Housing","authors":"Muftil Badri","doi":"10.31258/proksima.v1i2.10","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.10","url":null,"abstract":"Mobile phone is one of the most widely used electronic products. Housing is part of a very important component of mobile phone. Mobile phone housing refers to the outer housing of the device that encompasses its internal components. Mobile phone housing materials have been widely developed, such as polyester, polyurethane, carbon fiber, wood and leather. This paper proposes to conduct tensile tests and fabrication of mobile phone housing to determine the mechanical characteristics of coconut fiber composites as an alternative material for mobile phone product. Finite element simulation of drop test is then conducted to determine the impact robustness of a product. The investigation of tensile characteristics was carried out using variations in fiber direction. Vacuum assisted resin infusion is used as a method for manufacturing mobile phone housing product. Finite element simulation of mobile phone housing with various drop test positions was also conducted and the impact behaviour of coconut fiber composite housing materials was also obtained. It was shown that coconut fiber can be used as an alternative material for mobile phone housing. The design of the mobile phone housing also needs to be considered at the corner position of the housing because this is the location where the maximum impact stress occurs.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"160 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Automatic Hydroponic Plant Watering Based Arduino Microcontroller","authors":"Anita Susilawati, M. Abdi Mauliwarman, Dodi Sofyan Arief, Herisiswanto Herisiswanto","doi":"10.31258/proksima.v1i2.13","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.13","url":null,"abstract":"This paper aims to develop a design for an automatic hydroponic plant nutrient sprinkler. This plant watering device used an Arduino Mega 2560 microcontroller as the interface and an LCD (Liquid Cristal Display) as a display to indicate nutrient levels. The device design deployed a time system set using an Arduino microcontroller and RTC (Real Time Clock) based watering time settings. The development of this automatic nutrient watering device was equipped with a TDS (Total Dissolve Solid) sensor, which reads the value of the nutrient solution content in the water. The LCD displayed monitoring system performance and the relay functions to turn on and off the water pump connected to the hydroponic media watering pipe installation. The benefits of the device can save time and energy. Therefore, the device is more efficient than the manual watering system.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pressure Drop for Laminar Flow in 3D Straight and Elbow Pipes Using Computational Fluid Dynamics","authors":"Iwan Kurniawan","doi":"10.31258/proksima.v1i2.16","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.16","url":null,"abstract":"Designing piping systems for laminar flow requires an understanding of pressure drop. Pressure drop can offer insights for selecting pipe materials, designing an efficient piping system, and choosing the appropriate elbows and fittings. Utilizing numerical simulations, the pressure drop in straight pipes, 45o bends, 90o bends, and 180o bends is examined. Velocity profiles for straight pipes and bends are compared, revealing the increase in pressure drop caused by the bend in comparison to the straight pipe. The numerical simulation results indicate that the bend results in an increased pressure drop in the pipe's flow.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"153 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calculation Analysis of Steam Consumption Efficiency on The Dryer Section in Paper Machine","authors":"Abdillah Taqiyuddin, Ridwan Abdurrahman","doi":"10.31258/proksima.v1i2.15","DOIUrl":"https://doi.org/10.31258/proksima.v1i2.15","url":null,"abstract":"This research aims to analyze the efficiency of steam consumption in the Dryer Section at the Paper Machine. The research method involves calculating the actual steam consumption efficiency and comparing it with the TAPPI efficiency standard. The research results show that the average steam consumption efficiency for grade W/FIPF35-70 reached 94.51%, exceeding the TAPPI standard of 86%. However, some observations indicate substandard results, which can be caused by factors such as raw material quality, process settings, and equipment wear. The conclusions of this research provide insight into the factors that influence steam consumption efficiency, providing a basis for improving performance in Dryer Section Paper Machine.","PeriodicalId":493838,"journal":{"name":"Proksima","volume":"2 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135979063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}