E-Journal Politeknik Negeri Cilacap
Not a member yet
919 research outputs found
Sort by
Perhitungan Daya Kompresor dan Beban Kalor Pada Hasil Tangkapan Ikan Laut
Get PDFA refrigeration machine is needed on a fishing boat because the purpose of catching is to catch as many fish as possible and maintain the quality of the catch. In general, fishing vessels use mechanical refrigeration machines in an effort to maintain the quality of the catch up to the hands of consumers. The results of checking products that enter the hold showed the average initial temperature of the fish entering the hold was 11,7 oC. The final temperature of fish products after going through the freezing process is 2,075 oC. The total product load calculation is 101,1 KW and the average product heat load on the hold is 9,1 KJ/s. By knowing the suction pressure, exhaust, and working temperature of the compressor through a worksheet that is journalized every day, as well as the temperature in the pipe after the condenser, and the expansion valve using the Mollier R-22 diagram and the Saturation Properties-Temperature R-22 table, it is known that the average compressor power average of 1,9 KW and actual COP averaging is 4,6 KJ/Kg. The total compressor power result calculation is 20,96 KW with an average usage of 1,9 KW. The total result of the COP actual calculation is 51,4 with an average of 4,6.Pada kapal perikanan mesin refrigerasi sangat dibutuhkan, karena tujuan penangkapan adalah untuk menangkap ikan sebanyak mungkin dan menjaga kualitas mutu hasil tangkapan. Pada umumnya kapal perikanan menggunakan mesin refrigerasi mekanik dalam usaha mempertahankan mutu hasil tangkapan hingga ke tangan konsumen. Dari hasil pengecekan produk yang masuk ke palka dapat diketahui rata-rata temperatur awal ikan masuk ke palka sebesar 11,7 oC. Temperatur akhir produk ikan setelah melalui proses pembekuan adalah sebesar 2,075 oC. Total perhitungan beban produk adalah 101,1 KW dan rata-rata beban kalor produk pada palka adalah sebesar 9,1 kJ/s. Dengan mengetahui tekanan hisap, buang dan temperatur kerja kompresor melalui lembar kerja yang dijurnalkan setiap hari, serta temperatur pada pipa setelah kondensor, dan katup ekspansi menggunakan diagram Mollier R-22 serta tabel Saturation Properties-Temperature R-22 maka diketahui daya kompresor rata-rata sebesar 1,9 kW dan COP Aktual rata-rata sebesar 4,6 KJ/Kg. Hasil total perhitungan daya kompresor sebesar 20,96 KW dengan pemakaian rata-rata 1,9 KW. Hasil total perhitungan COP aktual sebesar 51,4 dengan rata-rata 4,6
Unjuk Kerja Termal Kolektor Surya PV/T Bersirip Menggunakan Metode Computing Fluid Dynamic
Get PDFPhotovoltaic Thermal (PV/T) collector is a device that can produce electrical energy and thermal energy simultaneously. However, the thermal energy increases the surface temperature of the PV and therefore it may reduce electrical efficiency. To overcome this problem, a finned thermal collector should be joined underneath the PV surface. The aim of this study is to simulate the thermal performance of a PV/T collector by using staggered fins with air as a working fluid. The parameters are varied from 25 to 50 mm in the fin geometry and from 12 to 48 g/s in air mass flow rate, respectively. Furthermore, the heat radiation used was 860 Wâ„m2 and Computing Fluid Dynamic (CFD) method was implemented in this research. The results showed that the PV/T surface temperature decreased by 7.04 % for the fin height of 37.5 mm and 11.9 % for the fin height of 50 mm when compared to the fin height of 25 mm. Thus, a greater cooling of the PV/T surface occurs in the fin height of 50 mm due to an increase in the heat transfer area which might absorb more of the unused thermal energy in comparison with others.Kolektor Photovoltaic Thermal (PV/T) adalah sebuah kolektor surya yang dapat menghasilkan energi listrik dan energi termal secara bersamaan. Namun energi termal tersebut dapat meningkatkan suhu permukaan PV sehingga dapat menurunkan efisiensi listrik. Untuk mengatasi hal tersebut diantaranya dapat digunakan kolektor termal bersirip yang ditempatkan dibawah permukaan PV yang lebih dikenal dengan kolektor PV/T. Penelitian ini bertujuan untuk mensimulasikan unjuk kerja termal kolektor PV/T dengan menggunakan sirip jenis staggered dan udara sebagai fluida kerja. Geometri sirip dan laju aliran massa udara divariasikan masing-masing (25–50) mm dan (12-48) g/s. Dalam penelitian ini metode Computing Fluid Dynamic (CFD) diimplementasikan dan besar radiasi termal yang digunakan adalah 860 Wâ„m2. Hasil penelitian menunjukkan bahwa bahwa jika dibandingkan dengan tinggi sirip 25 mm maka terjadi penurunan suhu rata-rata permukaan PV/T masing-masing secara berturut turut sebesar 7.04 % untuk tinggi sirip 37.5 mm dan 11.9 % untuk tinggi sirip 50 mm. Dengan demikian pendinginan permukaan PV/T yang lebih besar terjadi pada tinggi sirip 50 mm akibat peningkatan luas bidang perpindahan panas
Analisa Tensile Strength Komposit Serat Kulit Pohon Waru dengan Kombinasi Serat Karbon Kevlar Sebagai Material Reinforcement
Get PDFIn increasing the tensile strength of the waru tree bark fiber composite (Hibiscus tiliaceus), it is necessary to have a combination of reinforcement used in the composite material. One of the reinforcement materials that can be combined is carbon fiber kevlar. Kevlar carbon fiber has several advantages, including low density, absorbing vibrations well, and it is resistant to chemical solutions. The specific objectives of this study were to determine the maximum strain stress, modulus of elasticity, and fracture analysis of hibiscus bark fiber composites with a combination of kevlar carbon fiber as a reinforcement material. The independent variable in the study was comparing the composite with the different reinforcement materials used, including 100% hibiscus (Hibiscus tiliaceus) bark fiber, 100% kevlar carbon fiber, 50% combination fiber of hibiscus (Hibiscus tiliaceus) bark, and 50% kevlar carbon. The process of making composites uses the vacuum infusion resin method with specimens referring to the ASTM D638-03 type I standard. The results of this study are that combining kevlar carbon fiber as a reinforcement material can improve the mechanical properties in terms of the tensile strength of the hibiscus tree bark fiber composite.
 
Perbandingan Nilai Daya Luaran Panel Surya Kapasitas 50Wp Terhadap Posisi Reflektor Cermin Datar
Get PDFSolar panel systems are widely used to meet energy needs at this time. Solar panels have optimal power for 4 hours, namely 10:00 to 14:00. but this is still said to be not optimal if the angle of the static solar panels does not follow the movement of the sun. This can also be caused by weather factors that are covered in clouds. Previous research conducted by Tri Wahyu Ardianto used mirror reflectors but was not equipped with sensors and data storage. Based on this, to optimize solar panel energy, a flat mirror reflector design for solar panels has been made, equipped with four flat mirror reflectors on each side to form a large square. The solar panel is placed in the middle between the four flat mirrors. In this study, the measurement of electric power was carried out by carrying 3 variable angles for reflector positions, namely 0°, 60°, and 70°. The decision of the three reflector positions is made to find out the ratio of the maximum output power values. This system is also equipped with current, voltage, and light intensity sensors. The results show that the maximum output power of solar panels is shown at the reflector position of 60° with an average power output of 19.70 Watt followed by a reflector position of 70° with an average output power of 19.18 Watt and finally the reflector position is 0° with an average output power value of 14.87 Watt
Biokonsentrasi Faktor (BCF) dan Faktor Translokasi (TF) Purun tikus (Eleocharis dulcis) dalam Fitoremediasi Air Asam Tambang
Get PDFAcid mine drainage is mining waste that contains a lot of sulfate and heavy metals such as Fe and Mn which can cause environmental damage and pollute the ecosystem, therefore it needs to be managed. One way to manage acid mine drainage is with phytoremediation techniques using Purun tikus (Eleocharis dulcis). The ability of Purun tikus to accumulate heavy metals can be known by calculating the bio-concentration factor (BCF) and tranclocation factor (TF). This study aims to determine the value of bio concentration factor (BCF) and tranclocation factor (TF) in rat purun in absorbing Fe and Mn so that it can be used for coal mine acid water management. Sampling was conducted using Convenience sampling method. Analysis of Fe, Mn, BCF and TF levels was carried out using an atomic absorption spectrophotometer. In the study, the bio concentration factor (BCF) value for Fe was 7.53, and for Mn was 30.09. While the value of the tranclocation factor (TF) for Fe is 0.77 or the value of TF less than 1, this indicates that rat Purun in accumulating Fe metal uses a phytostabilization mechanism. Then the tranclocation factor (TF) value for Mn is 1.44 or TF value more than 1, indicating that in accumulating Mn metal, Purun rats use a phytoextraction mechanism
Pelatihan Software Mendeley Untuk Meningkatkan Kualitas Karya Tulis Mahasiswa
Get PDFOne of the indicators of the quality of higher education is the productivity of students in writing. The main problems faced by writers and participants when conducting research scientifically are originality, plagiarism, and compiling references. Besides that, some of the obstacles faced by students in general are their inability to write in terms of language and content. This training needs to be carried out in order to minimize the practice of plagiarism and manage references through presentations, practice, and questions and answers through three stages of activity namely the preparation, implementation, and evaluation stages. This service activity is carried out online via zoom with the target participants being final stage students who are currently or will be compiling a thesis. Based on the data, there were 112 applicants from various universities. Participants considered this workshop to be very important for the preparation of the final project and to avoid plagiarism
Upaya Peningkatan Manajemen Proyek Pada CV Nabila Zafira Mahalia Melalui Aplikasi Clickup
Get PDFAt CV. Nabila Zafira Mahali (Nazma) the daily recap of the work of the creative team still uses Google Excel which is prone to data manipulation by people who are irresponsible and don\u27t have a good history of data records, if someone makes a mistake. Recap for monthly reports takes quite a long time, if there is an error in awarding honorarium or there is data that is not appropriate then it is not immediately known by management, the creative team\u27s daily work report has an indirect relationship to the finance department, or the part that regulates awarding honorarium, if the data entered is unclear or inappropriate, there will be a delay in awarding honorarium. Therefore training is needed in using the clickup application which can help the creative team\u27s daily work recap. The process of implementing the training stages begins with an interview with director Nazma and documentation of the required data, followed by determining and creating training materials, and finally, continuing online training using Google Meet, with material using the click-up application, one of the template features, namely CRM (company management profile) in the template there is todo (work list), in progress (under construction), Ready (ready) and complete (finished) features, so that management can monitor the work of the creative team more clearly. In the results of the training evaluation, a score of 70% was obtained on the value of the questions on the benefits of training and project management control
Exploring the Implication of ChatGPT AI for Business: Efficiency and Challenges
Get PDFThis empirical study aims to examine the impact of ChatGPT AI on various business sectors, evaluating its benefits and challenges. Specifically, the study analyzes how ChatGPT AI is transforming business operations and enhancing customer experience in customer service, e-commerce, healthcare, finance, marketing, and developer business sectors. Using a comprehensive literature review approach, this study draws on relevant academic articles to identify and analyze the key applications of AI in the business sector, the benefits realized, and the challenges faced in adopting this technology. The study explores the implications of ChatGPT AI for businesses, including its potential to improve efficiency, reduce costs, and enhance competitiveness. Additionally, ethical and legal considerations surrounding the use of ChatGPT AI in business operations are evaluated, including issues related to data privacy, bias, and transparency. The study provides insights into future directions for the application of ChatGPT AI in business and the potential impact of this technology on various business sectors. The objective is to provide a comprehensive review of the impact of ChatGPT AI on businesses, its potential benefits, and challenges for businesses looking to adopt this technology. Overall, this study highlights the importance of considering both the benefits and limitations of AI adoption in businesses, as well as the ethical and legal implications of its use
Big Data Architectures and Concepts
Get PDFNowadays, the processing of big data has become a major preoccupation for businesses, not only for storage and processing but also for operational requirements such as speed, maintaining performance with scalability, reliability, availability, security, and cost control; ultimately enabling them to maximize their profits by using the new possibilities offered by Big Data. In this article, we will explore and exploit the concepts and architectures of Big Data, in particular through the Hadoop open-source framework, and see how it meets the needs set out above, in its cluster structure, its components, its Lambda and Kappa architectures, and so on. We are also going to deploy Hadoop in a virtualized Linux environment, with several nodes, under the Oracle Virtual Box virtualization software, and use the experimental method to compare the processing time of the MapReduce algorithm on two DataSets with successively one, two, and three and four Datanodes, and thus observe the gains in processing time with the increase in the number of nodes in the cluste
From Text to Insights: NLP-Driven Classification of Infectious Diseases Based on Ecological Risk Factors
Get PDFNumerous factors can affect the development of infectious diseases that emerge. While many are the result of natural procedures, such as the gradual emergence of viruses over time, certain ones are the result of human activity. Human activities form an integral part of our ecosystem, and especially the ecological aspect of human activities can encourage disease transmission. Additionally, Health ecologists examine changes in the biological, physical, social, and economic settings to understand how these alterations impact the mental and physical well-being of individuals. Hence, this research adopts a Framework-Based Method (FBM) in carrying out the task of classification of infectious diseases. The Framework-Based Method outlines all phases that this research follows to carry out the infectious disease classification process, providing a structured and reproducible approach. Results show that: XGB: Confusion matrix accuracy: 76%, Kappa: 73%, RF: Confusion matrix accuracy: 65%, Kappa: 60%, SVM: Confusion matrix accuracy: 63%, Kappa: 58%, ANN: Confusion matrix accuracy: 71%, Kappa: 67%, LDA: Confusion matrix accuracy: 76%, Kappa: 73%, GBM: Confusion matrix accuracy: 60%, Kappa: 53%, KNN: Confusion matrix accuracy: 43%, Kappa: 34%, and DT: Confusion matrix accuracy: 37%, Kappa: 29%. Furthermore, a Deep Learning model BERT was integrated with the best classification model XGBoots to create an interactive interface for users to carry out infectious disease classification. This integration enhances user experience and accessibility, contributing to the practical application of machine learning and Natural language processing in ecological disease classificatio