Prosiding Seminar Nasional Teknoka

Expert System Design for Diagnosing and Recording Laptop Damage History Using Dempster-Shafer Method

2023-12-31T21:28:20+07:00

Laptops are one of the most widely used computer devices because they have a minimalist and practical design so they can be taken anywhere. Using a laptop for a long period of time sometimes results in various types of damage with a variety of specific symptoms. The availability of technician laptop service locations is not always available within 24 hours. Based on preliminary data, 58% of users do not know the actual location of the damage to their laptop, while 42% of users already know the location of the damage to their laptop, and 48% of users will first find out the cause of the damage on the internet, the other 30% will immediately take it to a service center.. Goal. of this system is to create an Expert System for Diagnosing Laptop Damage and recording the damage history based on a website, making it easier for laptop users to find out where the damage to their laptop is based on the symptoms they experience. System testing was carried out using alpha and beta testing which resulted in an effectiveness test of 85.81, this shows that the system can make it easy for laptop users to find the location of the damage to their laptop based on symptoms.

Designing a Prototype of a Web-Based Tourism Information System in Malang City

2023-12-31T16:43:05+07:00

One of the best tourism destinations in Indonesia is Malang. This city has a variety of uniqueness that can attract tourists to visit it. With the development of technology in this era, many make things easier, one of which is conveying information. This study aims to design a prototype of a web-based tourism information system in Malang City so that later tourists can more easily obtain information about this city. The method used is a descriptive method which will present and analyze facts systematically so that it will be easy to draw conclusions. Data collection was carried out by distributing questionnaires. In designing this prototype, Data Flow Diagrams, Flowcharts, Database Designs, and Output Designs will be designed. The results of this information system prototype will include various information about tourism in the city of Malang.

Designing an Inventory Data Management System Using Visual Basic at PT.Unibless Indo Multi

2023-12-31T17:15:16+07:00

PT Unibless Indo Multi is engaged in IT Services, IT Trading, and IT Outsourcing. In this paper focuses on IT Trading, which includes the sale and rental of IT hardware, the provision of office equipment, the provision of shelves and archival support equipment and others. The author finds problems that occur specifically in the inventory of goods in processing inventory data still using simple applications, which causes the company's performance to be less than optimal. The author aims to solve existing problems by designing and building an inventory data management system using visual basic with the waterfall method, Unified Modeling Language (UML), Balsamiq Mockup and using a Microsoft Access database. Based on the test results using blackbox testing, the system runs as expected. After testing, 92.5 out of 7 respondents agreed that the system is easy to understand and use.

Design and Develop the Tax Ladder Educational Game (ARTAJAK) as an Interactive Media to Raise Tax Awareness among Elementary School Children

2023-12-31T17:33:39+07:00

In this era of the 4.0 industrial revolution, there are still many people who lack understanding about taxes. Due to this situation, early tax education is highly necessary. Because of the limited comprehension among children regarding the significance of the role of taxes, it greatly influences national development. Therefore, the objective of this research is to educate elementary school children through the creation of a snake-and-ladder game accompanied by quizzes about basic tax concepts. The development of this game employs the prototype research method as it helps developers work with users to effectively define system requirements, thereby minimizing system errors from the outset. The results of creating this game indicate that the developed game is able to enhance users' insights into tax knowledge and has been field-tested by 5 elementary school students to assess the success of the created ARTAJAK game.

Design of a Lunch Menu Scheduling Application for Employees Using the Design Thinking Approach and SUS Testing

2023-12-31T18:07:57+07:00

Scheduling is allocating an activity by taking to the sequence of implementation times and availability of limited resources. In the case of employee lunch menus in a company, lunch menu schedule can change every day within a week to adjust the availability of resources limited by company management. Scheduling repeated lunch menus manually will certainly waste a lot of time, an application is needed to do the scheduling automatically. Designing a scheduling application for lunch menus using the Design Thinking approach method applies 5 stages, namely Empathize, Define, Ideate, Prototype, and Testing. Result of this design is an application design which is then evaluated using the System Usability Scale (SUS) to measure user satisfaction. Where user satisfaction data was obtained using the form collecting method using JotForm media which was sent to 30 respondents. The SUS score result is 80.2, which means that the usability design is acceptable or feasible.

The Implementation of Preference Ranking-based Spam Filtering in the Design of Company Complaint Reporting System

2024-01-01T03:38:36+07:00

A company complaint system is an important tool for identifying and resolving workplace problems. By implementing transparent, supportive and responsive mechanisms, companies can create a positive work culture and empower employees to report concerns and contribute to overall organizational improvement. However, in the company's complaint system, there are still spam complaints so the process of receiving complaints in a system becomes difficult. The methodology used for research related to spam complaints is TF-IDF Preference Ranking, which involves determining the order of spam and non-spam complaint categories based on similarity values to determine complaint categories based on weighted documents. Blackbox testing of the research results shows that TF-IDF Preference Ranking can filter spam effectively by comparing complaint data with the system's spam dataset. The test results show that 90% of the spam test data can be categorized as spam and 95% of the functional requirements have passed the functional test and are in accordance with user needs.

Design and Implementation of Reading and Counting Learning Application for Early Childhood on Android Platform

2024-01-02T19:42:02+07:00

The current trend in the world of education is from traditional education to modern education using new information technology. The author designed a learning media application for children so that they can improve and develop their learning abilities. By making this application, parents can guide them in learning. The aim of this research is to design an application to improve learning abilities using the Waterfall Method. The Waterfall method is a sequential software development approach, with a process that runs sequentially from stage to stage, through the Requirements, Design, Implementation, Verification and Maintenance phases. The results obtained are the creation of an Android-based reading and arithmetic learning media application, where this application consists of several interesting features that can help children aged 4-9 years. The features in this application are packed with simple calculations, reading letters, and number recognition. To measure the application that is built as suitable for use, it is done by testing the application on 20 respondents and each respondent fills out a questionnaire consisting of 10 questions. Based on the results of the data analysis, a score of 78.625 was obtained, which means this application is suitable for use by children both in terms of appearance and content.

Infrastructure Development of Internet Networks at SMKN 3 Depok Schools to Support Online and Offline Learning to Improve the Quality of Students and Teachers at SMKN 3 Depok

2024-01-26T01:13:25+07:00

Progress in the field of innovation and data is very broad and high, especially in an advanced world like this, of course internet networks are very important and needed by all levels of society, of course this is very beneficial for educational organizations, especially SMKN Sekolah 3 Depok which is located on Jalan Abadi. Jaya, Sukmajaya area, Depok city. Along with the increasing need for learning and practice performances, improvements have been made to the web network foundation in schools and in train ing areas to add web networks and preparation of instructions so that educators can overcome problems that occur in schools. PC organization. Implementing an adequate web network framework to assist online and offline education and learning practices while accelerating the continuation period 4.0, as well as assisting educators in developing their capacity in the fields of innovation and data.

Web-Based Financial Management Information System Design For Sakura Coffee Cafe Using The Prototype Method

2024-01-26T10:58:18+07:00

The primary goal of this study is to develop a web-based financial management information system specifically for Sakura Coffee Cafe by using prototype methodologies. Due to manual financial management, the cafe is currently having issues. This results in stress and lower employee motivation in addition to decreasing work efficiency and effectiveness. The creation of an online, user-friendly financial management information system is the aim of this research, which will raise financial management's overall efficacy. This research produces an effective financial management system for Sakura Coffee Cafe by using the prototype method in system design. Proven through User Acceptance Test with black box testing, and a confusion matrix value of 87,8%, which confirmed the suitability of the system as the right solution for users.

Sentiment Analysis of Public Towards the Children's Toy 'Lato-Lato' Using the Support Vector Machine (SVM) Method on YouTube Social Media

2024-01-29T01:22:31+07:00

Lato-lato is a children's toy that has gone viral in Indonesia. This children's toy is quite controversial in Indonesian society because this toy creates quite a noise when played but also has several positive impacts for children. The purpose of this research is to analyze the sentiment of Indonesian people towards lato-lato toys from video comments on YouTube social media. The processes carried out are data crawling, preprocessing, normalization, labeling, and SVM classification. After the SVM classification process with a linear kernel, an accuracy of 81% was obtained. For positive sentiment, the precision is 80%, recall 85% and f1-score 82%, for negative sentiment, the precision is 83%, recall 77% and f1-score 80%. From the results of the sentiment analysis, more Indonesians respond positively to lato-lato, which indicates that Indonesians see lato-lato as not a problem and there are many positive benefits from lato-lato.

Implementation Of Scrum In The Design Of Information Systems For Building Rental At Graha Garda Dirgantara

2024-01-27T23:54:58+07:00

According to its capacity, a building can be used by the general public for various purposes. In this
research, the process of renting the building, namely Graha Garda Dirgantara, was still done manually,
by going directly to the location. This causes problems for people with busy and hectic schedules. The aim
of this research is to create a building rental system that can assist in the transaction process, reporting
data processing, and also marketing. The method used in system design in this research is agile
methodology starting from the product backlog, sprint, daily scrum and sprint review processes. This
research uses the Laravel framework to create a web-based Scrum approach. The results of a survey
conducted using Google Form showed that 53.8 percent of respondents said they strongly agreed and 30.8
percent said they agreed. These results also show that this approach makes rental data collection more
efficient because the data collection process has been saved to the database.

Comparison of Edge Detection in Robinson and Kirsch Methods

2024-01-29T01:38:09+07:00

This study aims to compare Robinson's edge detection method and Kirsch's method on image with a focus on the disclosure of special features such as texture, watermark, and design elements. Robinson's edge detection method uses a series of filters with eight neighboring pixel operations, while Kirsch's method uses a series of filters with more specific filter orientation to produce sharper edge responses. Paper money images were selected as research objects because they had distinctive features relevant to edge detection, such as differences in intensity on edge lines, smooth paper textures, and special patterns on watermarks. This research using banknote image and lung X-rays image dataset. From the results of comparison of edge detection with Robinson's method and Kirsch method it can be concluded that on Robinson's method the edge image of banknotes displays more detailed design elements of banknotes such as hero photographs, watermark, logo, and nominal. In the Kirsch method the bank image has a sharp edge response so that many of the design elements on the banknote are not clearly visible and contrasted with other banknotes. In a comparison of edge detection between Robinson and Kirsch's methods on pneumonia-infected lung X-rays, it can be inferred that Robinson produced a fine edge line but was difficult to find infection, while Kirsch produced a rough edge line that clarified infection in pneumonia-infected lungs.

Implementation Of The KIP Scholarship Admission Information System With Simple Additive Weighting (SAW) Implementation: A Case Study At Muhammadiyah University Prof. Dr. HAMKA

2024-01-29T01:46:28+07:00

This research explores the application of the Simple Additive Weighting (SAW) method in selecting KIP Lecture scholarship recipients at Muhammadiyah Prof. DR. HAMKA University (UHAMKA). The problem process is currently experiencing slowness and inaccuracy, prompting the need for a Decision Support System to increase accuracy and efficiency. With criteria adapted to UHAMKA policy, the aim of this research is to increase accuracy and reduce selection time. The SAW method is used to give weight to each alternative and this method can help the selection process be more accurate. This method produces efficient ranking of KIP Kuliah scholarship recipients. The results of tests carried out using black box testing show that the implementation of SAW can be efficient and effective. testing based on 2 examples of test cases showed that the SAW method. The accuracy results of the SAW method in case 1 were 100%, in case 2 it was 78% so that it could be used in determining prospective scholarship recipients at UHAMKA and make a positive contribution to student welfare and the image of the institution.

Open Archival Information System Reference Model in the Design of Educational Institution Archives Information System

2024-01-29T01:59:20+07:00

Archive information systems are very important in higher education institutions, to make it easier to manage digital archives. Institutions can take advantage of the benefits of digital archives, such as easy access to information, savings in physical space for storage, and protection of documents from damage or loss. One framework for long-term management, maintenance and storage that is often used in digital archives is the Open Archival Information System (OAIS) Reference Model. This research aims to design and build an educational institutional archival information system with the OAIS reference model that supports long-term access and understanding of information, especially in digital archives. The results of this research are the architectural design of an OAIS-based archive system which can be a reference for developing similar archive systems in educational institutions. The results of system testing using the black-box method, with 95% of functionalities passing the test, show that monitoring and evaluation of archives, especially in terms of long-term storage and identification of archive risks, is following user needs.

Performance-Based Remuneration System Using Full-Time Equivalent and Simple Additive Weighting Methods

2024-01-29T02:09:06+07:00

The many activities of higher education institutions with complex business processes can, without realizing it, cause employees at higher education institutions to receive excessive workloads which can lead to decreased employee performance. One way that can encourage employee motivation and performance is by providing remuneration or rewards to people fairly, evenly and consistently with incentives commensurate with the work they have done. This research aims to use the Full Time Equivalent method to evaluate workload with the results of the load being the basis for remuneration calculations using Simple Additive Weighting. The results of this research show that workload and remuneration can be assessed objectively and help make calculations more effective and efficient. The black box testing results show that the system is in accordance with user needs, where 90% of the test data has passed the requirements test. So, users can evaluate workload and provide systematic remuneration so that they can maintain optimal performance using the system built.

Design of User Interface (UI) for Early Childhood Quiz Application Based on Android with User-Centered Design Method

2024-01-29T02:29:01+07:00

In this research, the primary objective was to design an innovative user interface (UI) for an Android based quiz application targeted at early childhood education. The User-Cantered Design approach served as the foundation for the entire design process, with a focus on gaining an in-depth understanding of user needs, exploring creative ideas, and developing prototypes that meet their expectations. The resulting design incorporates specific elements tailored to support children's learning, including educational quiz games, visually appealing displays, and an intuitive user experience. Through a series of stages, including problem identification, user understanding, persona creation, brainstorming ideas, prototype development, and testing with early childhood users, this research successfully achieved an engaging and interactive UI design. Data from questionnaires indicated that a majority of respondents gave a score of 74 reflecting a positive evaluation of the user interface. This signifies the design's success in enhancing the learning experience of early childhood learners. These findings can serve as a robust foundation for the development of more effective and engaging educational quiz applications for young children, with a focus on an educational and intuitive user experience.

Implementation Of UI UX Queen Shop Jkt Website With Design Thinking Method

2024-01-28T00:25:36+07:00

Queen Shop JKT is a bakery with a diverse menu. The problem experienced is the difficulty in financial management which is still done manually, making it prone to errors in recording. This research aims to develop a user-centered design method to meet the needs of the shop and introduce UI/UX to improve financial management on their website. Design Thinking is a creative problem-solving method, prioritizing user involvement, which consists of Empathize, Define, Ideate, Prototype, and Test stages. The test results confirmed that the implementation of the website UI/UX significantly improved the efficiency of Queen Shop JKT’s financial management. This was proven at the testing stage through usability testing on 7 respondents and obtained an average score of 85 using the System Usability Scale (SUS) technique. It can be interpreted that so far the website meets the needs of users.

Analysis of the Impact of Cloud Computing on System and Data Security

2024-01-28T00:12:31+07:00

This research focuses on the impact of cloud computing. The research methodology involves systematic
literature review, case studies, data analysis, and theoretical examination to collect supportive data and
references, aiming to maximize research efficiency. The study also incorporates mitigation strategies and
risk management approaches. The findings indicate that the impact of cloud computing on system security
and data integrity can be tangibly measured through cloud resource testing. Utilizing comprehensive
analytical methods sheds light on security vulnerabilities that may arise during cloud computing adoption.
The research identifies key challenges faced by cloud users, such as unauthorized access and data leakage.
Survey outcomes and cloud resource testing reinforce the necessity for focused security policy development,
emphasizing the implementation of best practices. Data security measures recommended include
authentication methods, encryption techniques, and selecting trustworthy cloud services. These security
steps serve as safeguards to enhance data protection within the cloud environment.

Customer Retention Program Framework in Customer Relationship Management System Design

2024-03-07T13:05:24+07:00

Computer service services are now widely sought after when a computer or laptop device is damaged. But problems arise when customers have to look for and go to a service provider directly at the shop to carry out service or by making a telephone call or WhatsApp. Apart from that, service services rely on promotions through social media or only rely on customer satisfaction through word of mouth. This research aims to design a customer relationship management system for web-based computer repair services that is optimal and efficient based on the customer retention program (CRP) framework. CRP is a part of customer relationship management that focuses on various features that can keep customers coming back. Requirements analysis is carried out by finding functional requirements which are reduced to various design diagrams as the basis for system development. This research carried out black box testing which showed that user needs were met for the CRP framework that was built with the result that 85% of the functionality had passed the requirements test..

Analysis of Information System Needs to Support Civil Registration Activities

2024-03-07T12:53:17+07:00

Until now, the process of applying for and extending a Resident Identity Card (KTP) is still involved in bureaucratic procedures that take quite a long time. Apart from that, applications for Resident Identity Cards (KTP) still use paper which has the potential to be lost or damaged. When registering to make a Population Identification Card (KTP) at the Disdukcapil Office, there are often long queues which are exploited by irresponsible District Offices, who charge fraudulent fees on the grounds of speeding up the process of making a Resident Identification Card (KTP) or Family Card (KK).The system design method is based on work analysis (performance), information analysis, economic analysis, control analysis and efficiency analysis. Based on the results of research conducted, the Depok City Disdukcapil information system still has weaknesses in the form of no features for civil registration on the Depok population information and administration system (SIAK) website or its information so they still use third party applications. Information system and population information system website services (SIAK) Depok has a weakness in its service features, where on average most of the features cannot be used. Requirement analysis that has been carried out can help complete the website system in the Depok City Population Information and Administration System (SIAK), so that the civil registration process is fast, precise and accurate.

The Implementation of IoT in Creating Arduino-Based Automatic Trash Bins

2024-03-06T15:53:17+07:00

The environment is one of the most important things in life. A dirty environment and scattered rubbish can have a bad impact on humans. Usually, the trash can does not close or open automatically and the trash can is dirty. Moreover, this incident occurred because of factors that stimulate humans to throw rubbish in the right place. This is a mastermind in increasing or not realizing how to keep the world clean, sometimes an innovative approach is needed to attract everyone's attention, thereby eliminating the reluctance to throw rubbish in the right location. Trash cans can be equipped with an Internet of Things (IoT) technology system to make it easier to dispose of waste properly and benefit the community. Using an Ardiouno microcontroller, ultrasonic sensor and servo motor, the lid of this trash can can be opened automatically. The aim of this research is to develop an innovative device, namely a distinctive and attractive trash container, with the ability to open and close independently when detecting movement and knowing whether the trash can is full or not. It is hoped that this gadget can effectively attract people's attention and encourage them to throw away rubbish in the right place. The results of measuring ultrasonic sensor distance data specifically for Servo motors if it detects the condition of an object approaching with a distance data value < 10 cm, then it will activate the Servo motor to start the movement to open and close the trash cover again automatically. Meanwhile, the results of measuring ultra sonic sensor distance data specifically for traffic LEDs if >= 0 cm to <= 7 cm are red, if >= 8 cm to <= 17 cm are yellow, and <18 cm are green.

The Influence of Metaverse in the Field of Education

2024-03-06T14:39:00+07:00

As technology develops, sharing has been done to support learning. In the social 5.0 era, there are 3 things that must be utilized, namely: Internet of Things in the world of education (IoT), Virtual/Augmented Reality in the world of education, and the use of Artificial Intelligence (AI). So this research was carried out to find out how important the metaverse is for supporting learning. The results of research using this literature study show that the implementation of Metaverse in the education sector has great potential to support distance learning activities that are more interactive and immersive. In addition, Metaverse can provide scientific laboratory simulations, classroom simulations, or historical environment simulations that allow users to learn and interact in that environment.

Programming Kinematic Angles in Robot Leg Joints to Stabilize Forward Motion of Quadruped Robots

2023-12-27T23:14:26+07:00

In the 2023 Indonesian SAR robot contest, intelligent robots from each university compete to score by carrying orange mini dolls to designated locations. Robots must overcome various difficult obstacles. The intelligent robot in the competition is a legged robot that has clamps for holding mini dolls. Servo motors are one of the motors that are often used in legged robot joints. This research aims to program the kinematic angles of the joints of a legged robot so that it is able to traverse the 2023 SAR Robot Contest arena and its obstacles stably. By using 4 legs, namely front-right, front-left, rear-right and rear-left and using 3 servo motors on each leg, the robot can walk stably after programming certain kinematic angles on the servo motor. The robot is programmed to have 7 phases of movement between the legs that are aligned with a delay of 500 milliseconds for each phase. The robot can walk stably over all obstacles in the KRSRI 2023 robot arena except for the uphill stairs.

Design of a Wheeled Robot with the Ability to Walk on Slopes and Bluetooth-Based Control Signal Transmission

2023-12-27T22:50:22+07:00

In the 2023 ABU-Robocon (KRAI) robot contest, robots were instructed to insert rings into the poles of an arena in the form of a stacked floor. To maximize the score, the robot is allowed to climb the level 2 temple floor. Connecting the level 2 temple floor and the base of the arena is a ramp board with an incline angle of 18,420 and an area of 600 x 975 mm2. Another rule is that athletes controlling manual robots are not allowed to enter the arena or must stay outside the arena. This research aims to design a wheeled robot that has the ability to traverse uphill roads in the KRAI robot arena as well. The robot can be controlled remotely so that athletes do not need to enter the arena which has an area of 12x6 m2. The use of 4 omniwheels which are given a total DC voltage of 14.8 V, is able to make the aluminum robot able to traverse uphill roads in the KRAI 2023 robot arena. By using Bluetooth transmission, the robot can be controlled wirelessly across the entire arena.

Electricity Demand Projection in Kalimantan Island Considering the Nusantara Capital (IKN) Development Plan

2023-12-27T23:38:06+07:00

This study develops a model for forecasting electricity demand in the Kalimantan Island by considering the plan to build the IKN. Projections based on regression analysis are carried out for the West Kalimantan, Central & South Kalimantan and East & North Kalimantan region, while for the IKN the projection was based on the assumption of electricity consumption per capita. Variables that greatly influence the electricity demand based on the data analysis are GRDP, GRDP per capita, number of customers and electricity tariff. The projection result shows that the electricity demand in the Kalimantan Island with the construction of IKN area will increase from 12,542.20 GWh in 2022 to 147,639.96 GWh in 2060. In terms of the percentage of electricity sold per sector, there has been a significant decrease trend in the Household sector and a significant increase trend in the Industrial and Business sector.

The Influence of Sales Distribution Efficiency on Batik Pamekasan Products Using Data Envelopment Analysis (DEA) Method

2023-12-27T19:38:10+07:00

Batik Pamekasan is located in a small village so that buyer access is difficult, besides that it does not measure the efficiency level in each distribution area so that the profit is not optimal. The purpose of this study is to determine the level of efficiency of Pamekasan batik sales distribution using the Data Envelopment Analysis (DEA) method and provide suggestions for improvement in increasing the level of efficiency. The results obtained for the 100% efficient regions are DMU 4, DMU 5, DMU 6, DMU 7, DMU 8 range green. The inefficient regions are DMU 1, DMU 2, the efficiency score is 74.8%, 41.7% range red while DMU 3, DMU 9 the efficiency score is 90.99% range amber. Proposed improvements make rules limiting the purchase of batik products below 500 pieces for low quality, making centers close to customers so that access to purchases is easy and saves distribution costs.

The Implementation of Green Productivity in Various Batik Small and Medium Enterprises (UMKM) in Pamekasan

2023-12-27T20:42:46+07:00

Aneka Batik is a micro, small and medium enterprise that produces hand-written batik typical of the Pamekasan region. Waste from batik soaking is discharged directly into the ground and sewers. The impact produced by this batik waste is that it causes water pollution and causes corrosion of the soil. One approach that can help Aneka Batik MSMEs to reduce environmental impacts and increase productivity is the application of Green Productivity. With the application of Green productivity we can find out the level of productivity, find out the Enviromental performance Indicator (EPI) and find out alternative solutions for improvement. Based on the calculation, it is known that the resulting EPI index value is -10.382. To increase the EPI value, the alternative solution used is to replace textile dyes with natural dyes. This dye replacement is expected to provide savings of Rp 405,375 and an increase in productivity value of 0.03%.

Integration Of Solar Panels With Thermoelectric Modules As A Solar-Powered Room Cooling System

2023-12-27T20:53:35+07:00

Solar energy, as a renewable energy source, can be utilized as a power generator for room cooling systems. The room cooling system receives electrical energy supply from the conversion of solar radiation through solar panels. Subsequently, this solar generator system is integrated with thermoelectric modules to produce a cold condition within the cooling system. The objective of this research is to achieve maximum heat absorption by the thermoelectric cooler in the room cooling system, determine the lowest attainable temperature, and evaluate the coefficient of performance of the cooling system. The method employed is an experimental approach, utilizing a room cooling model represented by a 0.25 m3 volume cooling box. The solar cells, serving as the power source, are oriented towards the north to maximize sunlight intensity over an extended period. The solar cell output, in the form of electrical and thermal energy, is supplied to the thermoelectric cooling system arranged in series. When electrical power is applied to the thermoelectric modules, temperature changes occur on both sides. The cold side absorbs heat from the cooling space, while the hot side releases heat into the environment. The use of a heatsink on the cold side enhances heat absorption. After conducting experiments, data collection, and processing, the overall solar cell output is determined to be 413.23 W. Meanwhile, the thermoelectric cooler achieves a minimum temperature of 24.6°C. The total heat load is found to be 416.70 W, resulting in a coefficient of performance for the cooling system of 1.01.

Study Of Fuel Potential With The Composition Of Rice Husk And Coconut Shell For Biomass Fuel

2023-12-31T09:05:02+07:00

Coconut shells and rice husks as alternative raw materials to reduce the use of inorganic energy, from the results of previous research, rice husks have a low calorific value, so to increase the calorific value it is necessary to add other materials that have a better calorific value, other alternatives as The support is coconut shell. The research method was carried out using experimental testing, starting with the burning process to become charcoal, the process of refining the material (mesh), the molding process, and the drying process, the briquette lab test process. In the mixing process, the adhesive material is bran adhesive with a concentration of 1.3. The aim of this test was to analyze the calorific value, water content and amount of ash contained in the briquettes. The research results showed that the calorific value of rice bran husks was 4375.42 Calories/gram, air content 23.43%, dust content 33.79%, and for rice husk coconut shell the calorific value is 5925.96 calories/gram, water content 19.4%, dust content 18.3%

Influence of Thermal Performance on Double Serpentine Minichannel Liquid Cold Plate with Air as the Working Fluid

2023-12-31T09:36:13+07:00

Temperature is the main cause of failure of electronics and electric vehicles (EV). This condition causes thermal runway, which is a condition where the amount of heat generated by the battery continues to increase so that it is not controlled. To overcome this condition, an effective cooling system is needed, one of which is a liquid minichannel cold plate. The purpose of this research is to determine the performance of double serpentine with water fluid in a liquid cold plate cooling system. This research uses a double serpentine liquid minichannel cold plate with dimensions 104 × 80 × 11 mm with aluminum . Using a channel width of 0.5 mm with a depth of 4 mm, so as to obtain a hydraulic diameter of 0.889 mm. The flow rate variations used are 1 LPM; 1.25; and 1.5 LPM. In addition, this study varies the power from 10 W to 90 W with an increase of 20 W. The results of this study show that the flow rate affects the heat transfer coefficient. The greater the flow rate value, the higher the heat transfer coefficient value produced. The increase in the value of this coefficient affects the decrease in surface temperature. The increase is shown in the condition of 1 LPM value ( ) worth 0,39 kW/m² K; 1.25 LPM value ( ) worth 0,44 kW/m² K; while for 1.5 LPM value ( ) worth 0,52 kW/m² K. In addition, the flow rate also affects the increase in pressure drop. The increase is shown in the condition of 1 LPM pressure drop value of 137,89 kPa; 1.25 LPM of 165,47 kPa, and 1.5 LPM of 199,94 kPa.

The Influence of Air and Water Mass Ratio on the Performance of Forced Draft Wet Cooling with Perforated Inclined Splash Fill

2023-12-31T09:51:48+07:00

This study aims to experimentally analyse the performance of a forced wet cooling tower (WTC) using multilevel inclined perforated splash fill. The hot water temperature is set at 60 C; Packing has an inclination angle of 15o, 20^o, 25^o and a perforation ratio of 2.6%, which consists of five levels of galvanised plate fill. The water flow rate is ± 0.0917 kg/s, and the five variations of air flow rate are 0.02033, 0.02631, 0.02995, 0.03770, and 0.04261 kg/s. The inlet hot water temperature is 60 C. In this study, it can be seen that the ratio of water mass and air mass affects the performance of the cooling tower

Conversion of Solar Energy into a Cooling System Using Photovoltaic and Thermoelectric Coolers Installed in Parallel

2024-01-01T03:28:54+07:00

The results of converting solar energy into electrical energy by a photovoltaic system can be utilized for a cooling system. This cooling system is a combination of a photovoltaic system and a thermoelectric cooling system. The electrical energy generated by the photovoltaic system is converted by the thermoelectric cooler into a temperature difference on both of its sides. On the hot side of the thermoelectric cooler, heat is expelled as much as possible so that the cold side can absorb as much heat as possible. The objective of this research is to obtain the cooling performance coefficient and the lowest possible temperature in the cooling space. The research method employed is experimental. Before conducting testing and data collection, a research device is first constructed. The research device used in this study consists of a frame for the solar panel and another frame for the cooler. Solar cells are placed on the upper part of the solar panel frame, while the cooler frame contains a cooling space with walls lined with styrofoam, aluminum, styrofoam, and plywood (from the inside out). This study uses three modules of TEC-12706 thermoelectric type, each equipped with three fans. Data collected include sunlight intensity, wind speed, environmental temperature, air humidity, temperature on the cold side and hot side of the thermoelectric cooler, current and voltage entering the thermoelectric module, and the temperature inside the cooling space. The research results indicate that the coefficient of performance (CoP) for the cooling space is 1.33, and the lowest temperature achieved in the cooling space is 22.2°C.