Atlantis Highlights in Engineering最新文献

{"title":"The Implementation of Tpack Framework Based Interactive Digital Learning for Cruise Vocational School (SMKP) Sinar Bahari Palembang","authors":"Hetty Meileni, Indra Satriadi, Sony Oktapriandi, Desi Apriyanty, Dwi Harsyah Prasetya, Ade Prasetyo, Muhammad Faraby","doi":"10.2991/ahe.k.220205.049","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.049","url":null,"abstract":"TPACK Framework (Technological Pedagogical Content Knowledge) is an ultra-important aspect for learning activities. It is not only about how to develop a good teaching process including giving and scoring assessment instruments but also understanding students’ behavior and its psychological aspect. Pedagogy is about teaching in specific methods and strategies in order to know student's character deeper, resulted in specific teaching strategy for specific students. Before the pandemic, the only things achieved was only pedagogy and content, which are teaching materials taken from books. The transition period and adaptation of the pandemic often only presents content and technology. For example, the teacher only provides material, text or assignments via WhatsApp or Google Forms application with lack of interactions. Therefore, it is very important to include the three components of TPACK to achieve effective learning. The application of interactive digital learning is needed to raise students' motivation and enthusiasm for learning. The method used in this research is 4-D namely: Define, Design, Develop and Disseminate. The result shown that using interactive digital learning with netboard application, quizwhizzer.com and Qodlu are the best way to implement TPACK. Each student in cruise vocational school (SMKP) Sinar Bahari Palembang has fun learning with a better personal approach towards courses.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116803056","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":"Towards Reproducible Performance of Grid Connected Photovoltaic Battery Storage","authors":"Monika Graff, O. Wollersheim, Johanna F. May","doi":"10.2991/ahe.k.220301.003","DOIUrl":"https://doi.org/10.2991/ahe.k.220301.003","url":null,"abstract":"Several attempts have been made to define and measure performance parameters of photovoltaic home storage systems. Ideally, performance parameters are accepted by the scientific community as well as by manufacturers, test laboratories and customers. The German industry association for energy storage (BVES) filed guidelines for performance evaluation in cooperation with research institutions and manufacturers. However, most storage systems are tested only once and in one test lab, so reproducibility cannot be taken for granted. In addition, the current version of the standardized report on performance parameters does not consider measurement uncertainty, which may lead to misleading interpretations of the relative performance of different storage systems. Performance parameter deviations between different storage systems are not huge, at least for some parameters. [1] In our work, conversion efficiencies of all system paths have been measured in the SOLARWATT Innovation laboratory and for the same generator coupled storage system at an independent research institution. Here, three photovoltaic generator voltage levels between 285 V and 640 V as well as three battery voltage levels between 107 V and 151 V were measured in both laboratories. Resulting charge and discharge efficiencies were also evaluated for a storage capacity of 2.4 kWh as well as a storage capacity of 7.2 kWh. Measurement uncertainty was calculated in reference to absolute conversion pathway efficiency as defined in the guidelines for performance evaluation. For direct AC usage of photovoltaic generation or grid feed in a maximum efficiency of 97.56±1.66% was measured at maximum MPP voltage and nominal power. For photovoltaic battery charge (i.e. DC usage) a maximum efficiency of 95.04±0.28% was found at nominal MPP voltage and half nominal power. The authors recommend including measurement uncertainty evaluations into an updated version of the guideline for performance evaluation of photovoltaic home storage systems. This way, scientific evaluation of storage systems will become more transparent. Keywords— performance, efficiency, measurement uncertainty, reproducibility","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126748475","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":"The Potential of Charcoal Gasification as an Eco-Friendly Fuel","authors":"Aria Yopianita, Aida Syarif, M. Yerizam","doi":"10.2991/ahe.k.220205.023","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.023","url":null,"abstract":"The use of coal as primary energy in Indonesia will continue to be carried out, although slowly it will experience a significant decline until 2050 by the mandate of the National Energy Policy and the General National Energy Plan; this is more or less due to the potential of national coal reserves of 38.84 Billion Tons. However, planning for green coal or clean coal must be the first step by providing added value for coal through downstream coal gasification methods where the pilot project will be held at PT Bukit Asam as a state-owned enterprise. Coal gasification will produce by-products in the form of char which allegedly still has energy potential. As an effort to recycle when that pilot project is going operation, this char is then used as raw material to make briquettes. In this preliminary research, using coal samples with seam variation from PT Bukit Asam and the gasification process produces some char. After char characterization result by proximate and ultimate analysis, it is found that char experiences an increase in Gross Calorific Value grades from 5,804 cal/gr to 6,183 cal/gr (seam A1), from 5,794 cal/gr to 6,281 cal/gr (seam A2), from 5,837 cal/gr to 6,320 cal/gr (seam B1) and from 5,898 cal/gr to 6,407 cal/gr (seam C) and a significant decrease in sulfur levels from 1.18% to 0.38% (seam A1), from 0,41% to 0.30% (seam A2), from 1.12% to 0.59% (seam B1) and from 1.19% to 0.69% (seam C) and also a significant decrease of inherent moisture from 16.10% to 12% (seam A1), from 15.10% to 11.40% (seam A2), from 17.6% to 10.30% (seam B1) and from 14.8% to 9.9% (seam C). This result makes char potentially a raw material for solid fuels that are environmentally friendly.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129708011","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":"Experimental Investigation of the Cycle Stability of different Iron Oxide Composites for a Redox Hydrogen Storage Process","authors":"Lea Huber, Bernd Gamisch, B. Dawoud","doi":"10.2991/ahe.k.220301.013","DOIUrl":"https://doi.org/10.2991/ahe.k.220301.013","url":null,"abstract":"A promising process to store hydrogen is the thermochemical storage based on the repeated reduction and oxidation (redox) of iron oxide or iron. This storage process is an intermittent, twophase reaction, which takes place under atmospheric pressure in a hydrogen atmosphere during reduction (charging) or in a steam atmosphere during oxidization (discharging). The investigations have been carried out at two constant temperatures, namely 700°C and 800°C. During the storage phase, only iron exists inside the storage reactor a fact that makes the redox system much safer, compared to hydrogen storage under pressure in a tank. This work aims at studying the effect of adding different supporting materials upon producing the iron oxide storage composite samples on their thermochemical cycle stability. Furthermore, the influence of the temperature during the initial sintering process and the redox cycles on the reaction behavior of the iron oxide composites is investigated. It turned out that pure iron oxide pellets have lost about 65% of their redox potential after only three cycles. Applying 10 wt.% of calcium oxide has improved the cycle stability of the iron oxide pellets to over nine cycles. After nine cycles, a loss of redox performance by less than 5% was observed. This has been attributed to the densification of the sample’s outer surface, which is associated with slowing down the gas diffusion rate into/out of the investigated sample. In addition, reducing the temperature during the cycling (800°C to 700°C) and the sintering from 1100°C to 950°C has shown a positive effect on enhancing the cycle stability.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128663871","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":"Design of Touch Key-Voice Command Based Vehicle Additional Security System","authors":"M. Jauhari, Rusmini Sri Maryati, Raihan Raihan","doi":"10.2991/ahe.k.220205.045","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.045","url":null,"abstract":"Vehicle theft is still a big problem, usually by damaging the ignition switch. So that additional security is needed in a vehicle. The following paper describes a vehicle security system with a combination of a touch key and voice commands to be installed on a motorcycle. To prevent theft, a motorcycle can only be started by touching the hand at a secret point and using voice command with a predefined password. The proposed prototype uses an Arduino microcontroller, a touch key module, a Bluetooth module, and a relay module. The test results show that the security system that has been created successfully starts the engine only if it is activated using the touch key first. It will pass a voltage of 7.9 V to power the microcontroller. Then activate the CKP sensor and fuel injector using a voice command via a Bluetooth smartphone connection. The distance of sending data from the smartphone to the Bluetooth module in conditions without obstacles can reach 12 meters. Repeated testing shows the designed prototype can work well as expected. Therefore, this prototype has the potential to be developed and implemented as a vehicle security system.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124585415","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":"Power-to-Process-Heat in Industrial Combined Heat and Power Plants – Integration of a Large-Scale Thermochemical Energy Storage","authors":"Gesa Backofen, Manuel Würth, A. Vandersickel, S. Gleis, H. Spliethoff","doi":"10.2991/ahe.k.220301.002","DOIUrl":"https://doi.org/10.2991/ahe.k.220301.002","url":null,"abstract":"With an increasing share of electricity from renewable energy sources in the German energy market, storage systems are needed to close the gap between production and demand. The thermochemical storage system based on the reversible reaction of CaO and Ca(OH)2 is one of the most promising approaches for high temperature thermal energy storage concepts. In this paper, a concept is developed to integrate a largescale thermochemical storage system into an industrial heat and power plant. A mixed integer linear problem was created in TOP-Energy to conduct economical optimizations of the industrial heat and power plant with and without storage system. The linearization of the storage system was achieved by a correlation of input and output streams of a stationary CSTR MATLAB model. Hourly simulations for the years 2019, 2030 and 2040 with the help of energy price prognoses proved the economic benefit of the operation with storage system. Keywords—thermochemical energy storage, industrial heat and power plant, CaO/Ca(OH)2, fluidized bed reactor, mixed integer linear programming.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"338 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124761102","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":"Purification of Raw Material and Biodiesel Products from Waste Oil with Deep Eutetic Solvent (DES)","authors":"Sahrul Effensi, Aida Syarif, I. Irawan","doi":"10.2991/ahe.k.220205.027","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.027","url":null,"abstract":"Biodiesel is a substitute for diesel fuel which is produced from the synthesis of various plant or animal oils. Waste cooking oil is an example of plant oil that can be used as raw material to make biodiesel. To prevent saponification at the trans-esterification stage it use Deep Eutectic Solvent (DES) as purified The high content of Free Fatty Acids (FFA) in waste cooking oil. The purpose of this study was to determine the effect of variations in the molar ratio, reaction time and stirring speed of the DES synthesis on the free fatty acid content of biodiesel. DES was made from a mixture of choline chloride and ethylene glycol with a molar ratio of 1:1, 1:2, 1:3, 1:4, and 1:5, with variations in reaction time of 15 minutes and 30 minutes, and variations in stirring speed of 200 rpm and 300 rpm at 50oC. The FFA content of waste cooking oil as raw material for biodiesel is 8.323%. The results showed that the smallest decrease in FFA levels was up to 0.55% at a 1:2 molar ratio, a reaction time of 30 minutes and a stirring time of 300 rpm.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124192200","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":"Implementation of Solar Cells as an Alternative Energy Source for Automatic Water Tank Filling in Hydroponic System","authors":"Yudi Wijanarko, Renny Maulidda, Masayu Anisah, E. Evelina, Sara Yulida, Tarisa Ramadhani, Philips Dharmaraj, Metrina Jasman","doi":"10.2991/ahe.k.220205.039","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.039","url":null,"abstract":"Agricultural sector requires electrical energy in the on a not-too-wide area called the hydroponic planting system. Hydroponic systems utilize the flow of water and the provision of nutrients. However, sometimes the use of conventional energy does off so that the supply of water and nutrients also stops which results in a decrease in plant quality. Hydroponics is a growing medium that uses water as a growth medium instead of soil, therefore a proper irrigation and nutrition system is needed so that plants can develop normally. One of them is the Nutrient Film Technique, the plant roots grow in a shallow circulating nutrient layer so the plants can get enough water, nutrients and oxygen. The NFT system uses a tank as a place to mix nutrients and water, and the water will flow continuously to the plants with the help of a pump. This system integrates several sensors, namely water flow sensors and float level switch sensors. This system results in the filling of water tanks in hydroponic plants that work automatically.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"300 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124239919","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":"Comparison of Batteries Used in Electrical Vehicles","authors":"Selamat Muslimin, Z. Nawawi, B. Suprapto, T. Dewi","doi":"10.2991/ahe.k.220205.074","DOIUrl":"https://doi.org/10.2991/ahe.k.220205.074","url":null,"abstract":"The electric vehicles (EVs) become very popular this day as an effect of the demand in order to reduce automobile emissions. The utilization of energy efficiency to preserve the global environment has been one of public concern. One of current interest is to provide the equipment related to efficient electric power and to reduce air pollution, especially CO2 emissions. Batteries have been the main energy source for a long time to EVs. Along with time, the technologies of different battery have been invented and adopted. The efficiency of battery is about how much power the battery can charge and discharge concerning battery capacity. The battery management system (BMS) has a crucial role in ensuring bout safety and performance of batteries. In general, there are two categories of batteries based on the ability of recharging, they are primary and secondary battery. The primary battery is type that can only be used once after being fully discharged. The secondary battery is type of battery that able to be recharged after discharging process. In EVs, it requires rechargeable battery with long cycle life, less of energy loss, high power density and sufficient safety level. Some types of batteries that used in EVs such as lithium-ion (Li-ion), lead acid, nickelcadmium (NiCd) and nickel-metal hydride (NiMH), etc. Li-ion battery becomes the most popular power supply implemented for Evs.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125618491","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":"The Challenge of Planning and Constructing Large-Scale Hot Water TES for District Heating System: A Techno-Economic Analysis","authors":"A. Tosatto, F. Ochs, A. Dahash, C. Muser","doi":"10.2991/ahe.k.220301.006","DOIUrl":"https://doi.org/10.2991/ahe.k.220301.006","url":null,"abstract":"-In an international context (e.g. Germany, Denmark), the integration of long-term thermal energy storage (TES) into block heating systems already exists. Yet, the so-called pit TES cannot be easily applied to central European district heating (DH) systems because of the varying heat demand, temperature level, TES size and geometry a ground conditions (e.g. presence of groundwater), etc. Thus, within the framework of the Austrian Flagship project Giga_TES (FFG), very large-scale underground TES are developed and optimized by means of simulations. The aim is to provide solutions that enable a significant reduction of fossil fuels that traditionally are needed in DH systems. This can be achieved through an optimized design of a multifunctional TES allowing short-term as well as long-term heat storage with appropriate dimensioning and optimal planning of solar thermal, waste heat use and heat pumps for a specific location and system. The envisioned size of new giga-scale storage technologies and the construction in the subsurface require new construction methods. Experiences show that improvements are needed on material performance and durability and on materials and component development. Cost effectiveness and system integration call for higher storage density and thus, higher temperatures, imposing even higher demands on the materials used. This together with the requirements of vapour tightness, serviceability and durability of innovative solutions for cover, wall and bottom with respect to liners and insulation call for novel materials and construction methods. Hence, numerical models are developed to optimize the thermal, structural, system integration and economic performance of materials, components and system. This contribution highlights the challenges of constructing cost efficient giga-scale TES. Different construction methods for tank and pit TES are compared with respect to their investment costs. The thermal performance of the different TES is compared by means of numerical simulations for a set of boundary conditions.","PeriodicalId":177278,"journal":{"name":"Atlantis Highlights in Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132413480","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}