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Unjuk Kerja Termal Kolektor Surya PV/T Bersirip Menggunakan Metode Computing Fluid Dynamic 使用动态流体计算方法展示漂浮的PV/T太阳能热板
Pub Date : 2023-07-30 DOI: 10.35970/infotekmesin.v14i2.1878
Amrizal Nalis, Muhammad Irsyad, A. Yonanda, Rizal Khairudin
Photovoltaic 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 W⁄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.
光伏热(PV/T)集热器是一种能同时产生电能和热能的装置。然而,热能增加了PV的表面温度,因此它可能会降低电效率。为了克服这个问题,应该在PV表面下方连接一个翅片式热收集器。本研究的目的是通过使用交错翅片和空气作为工作流体来模拟PV/T集热器的热性能。这些参数在翅片几何形状和空气质量流量的变化范围分别为25 ~ 50 mm和12 ~ 48 g/s。利用860 W / m2的热辐射,采用计算流体力学(CFD)方法进行研究。结果表明:当翅片高度为37.5 mm时,PV/T表面温度比25 mm时分别降低了7.04%和11.9%;因此,由于传热面积的增加,PV/T表面在50 mm的翅片高度处发生了更大的冷却,这可能比其他翅片吸收更多未使用的热能。
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引用次数: 0
Perhitungan Daya Kompresor dan Beban Kalor Pada Hasil Tangkapan Ikan Laut 压缩机处理和热负荷到海鱼
Pub Date : 2023-07-30 DOI: 10.35970/infotekmesin.v14i2.1874
B. Ziliwu, Darel Aprilio Muharram
A 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.
渔船上需要一台制冷机,因为捕捞的目的是捕捞尽可能多的鱼,并保持捕获的质量。一般来说,渔船使用机械制冷机是为了尽量保持渔获品的质量能送到消费者手中。检查进入货舱的产品的结果显示,鱼进入货舱的平均初始温度为11.7℃。鱼制品经过冷冻过程后的最终温度为2075℃。产品总负荷计算为101.1 KW,货舱平均产品热负荷为9.1 KJ/s。通过每天记录的工作表,了解压缩机的吸气压力、排气压力和工作温度,通过Mollier R-22图和饱和特性-温度R-22表了解冷凝器后管路温度和膨胀阀温度,得知压缩机功率平均值为1.9 KW,实际COP平均值为4.6 KJ/Kg。压缩机总功率计算结果为20,96 KW,平均使用量为1,9 KW。COP实际计算结果为51,4,平均使用量为4,6。
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引用次数: 0
Analisis Kandungan Silikon Karbida (SiC) Sebagai Filler Terhadap Peningkatan Kekerasan Pada Metal Matrik Komposit
Pub Date : 2023-07-29 DOI: 10.35970/infotekmesin.v14i2.1668
Muhammad Ghazali Arrahim, Leo Hutri Wicaksono, Muhammad Syaiful Fadly, Afrizal Abdi Musyafiq
Metal Matrix Composite is one of the metal composites that utilize aluminum alloy as a matrix in its fabrication. MMC has better specifications than the conventional materials it forms because it is light, ductile, with better hardness properties. The aluminum alloy as the matrix in this study has good mechanical properties but relatively low hardness values, especially type 2xxx aluminum containing Al-Cu or duralumin. By adding silicon carbide (SiC) ceramic content which acts as a filler in the manufacture of MMC it aims to increase the hardness value through a strengthening mechanism by analyzing the distribution of filler particles to the matrix. Using the sintering method with temperature variations that affect the mechanical properties of MMC. From the tests carried out the MMC specimens experienced an increase of 7.06% with the highest hardness value at 300oC sintering temperature of 71.6 HRB. With a SiC content of 14.42% Wt. Then it was observed using a Scanning Electron Microscope (SEM) that the distribution of SiC particles experienced an even distribution and bonded to the aluminum matrix thereby reducing porosity and increasing the hardness value of the MMC material.
金属基复合材料是利用铝合金作为基体进行制造的金属复合材料之一。MMC比它形成的传统材料具有更好的规格,因为它重量轻、韧性强、硬度更好。本研究中作为基体的铝合金具有良好的机械性能,但硬度值相对较低,尤其是含有Al-Cu或硬铝的2xxx型铝。通过在MMC的制造中添加碳化硅(SiC)陶瓷作为填料,其目的是通过分析填料颗粒在基体中的分布,通过强化机制来提高硬度值。采用影响MMC力学性能的温度变化的烧结方法。根据所进行的测试,MMC试样的硬度增加了7.06%,在300℃烧结温度下的最高硬度值为71.6 HRB。在SiC含量为14.42%Wt的情况下。然后使用扫描电子显微镜(SEM)观察到,SiC颗粒的分布经历了均匀分布并结合到铝基体,从而降低了孔隙率并增加了MMC材料的硬度值。
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引用次数: 0
Klasifikasi Citra Mengkudu Berdasarkan Perhitungan Jarak Piksel pada Algoritma K-Nearest Neighbour 基于K-近邻算法像素距离计算的捕获图像分类
Pub Date : 2023-07-29 DOI: 10.35970/infotekmesin.v14i2.1827
Candra Irawan, Eko Hari Rachmawanto, Christy Atika Sari, Raisul Umah Nur
Noni fruit is included in exported food commodities in Indonesia. The size of noni fruit, based on human vision, generally has varied shapes with distinctive textures and various patterns, so that the process of filtering fruit based on color and shape can be done in large quantities. In this study, K-Nearest Neighbor (KNN) has been implemented as a classification algorithm because it has advantages in classifying images and is resistant to noise. Noni imagery is a personal image taken from a noni garden in the morning and undergoes a background subtraction process. The imagery quality improvement technique uses the Hue Saturation Value (HSV) color feature and the Gray Level Co-Occurrence Matrix (GLCM) characteristic feature. KNN accuracy without features is lower than using HSV and GLCM features. From the experimental results, the highest accuracy was obtained using HSV-GLCM at K is 1 and d is 1, namely 95%, while the lowest accuracy was 55% using KNN only at K is 5 and d is 8.
印尼出口的食品中包括诺尼果。诺尼果的大小,基于人类的视觉,通常具有不同的形状,具有不同的纹理和各种图案,因此可以大量完成基于颜色和形状过滤水果的过程。在本研究中,K-最近邻(KNN)被实现为一种分类算法,因为它在对图像进行分类方面具有优势并且抗噪声。诺尼图像是早上从诺尼花园拍摄的个人图像,经过背景减法处理。图像质量改善技术使用色调饱和度值(HSV)颜色特征和灰度共生矩阵(GLCM)特征特征。没有特征的KNN精度低于使用HSV和GLCM特征。根据实验结果,在K为1且d为1时使用HSV-GLCM获得最高准确度,即95%,而仅在K为5且d为8时使用KNN获得最低准确度为55%。
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引用次数: 0
The Robot Design Rancang Bangun Robot Pembersih Solar PV Dengan Sistem Pengendali Nirkabel 基于无线系统的光伏太阳能清洁机器人设计
Pub Date : 2023-07-29 DOI: 10.35970/infotekmesin.v14i2.1699
Oktavianus Ardhian Nugroho, Y.B. Adyapaka Apatya, Fransiskus Octario Sanctos Perdana Tukan, Yoannes Fredy Sakti
One type of renewable energy source that is starting to be widely used at this time is the type of solar power generation. This system uses a photovoltaic effect where sunlight is converted into electricity. A solar cell usually consists of an arrangement of semiconductors cells often called solar PV modules. Obstacles arise when this PV module is dirty because the electrical power generated by the module becomes decreased. Manual cleaning is one of the ways to restore power to this PV. In this study, a cleaning robot machine has been designed and made that can clean solar PV modules automatically. The purpose of the study is to simplify the module maintenance process, ensure the safety and security of workers, reduce module damage, and ensure the cleanliness of the module. The design method has successfully made a robotic machine to clean solar PV modules. The test results also prove that the tool made can clean the module quickly and safely.
目前开始广泛使用的一种可再生能源是太阳能发电。该系统利用光伏效应,将太阳光转化为电能。太阳能电池通常由一组称为太阳能光伏组件的半导体电池组成。当这个光伏组件变脏时,会产生障碍,因为组件产生的电力会减少。手动清洁是恢复该PV供电的方法之一。本研究设计并制造了一种清洁机器人,可以自动清洁太阳能光伏组件。研究的目的是简化模块的维护过程,保证工人的安全,减少模块的损坏,保证模块的清洁度。该设计方法已成功制造出清洁太阳能光伏组件的机器人。测试结果也证明了所制作的工具能够快速、安全地清洗模块。
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引用次数: 0
Komparasi Model Analisis Sentimen Pada Twitter Terhadap Kemahalan Minyak Goreng dengan Metode Naive Bayes dan Support Vector Machine Twitter上对油墨不足的情绪分析与天真的贝耶(Naive Bayes)方法和支撑向量机(Support Vector Machine)的比较
Pub Date : 2023-07-29 DOI: 10.35970/infotekmesin.v14i2.1759
Moh. Aminullah Al Fachri, Ummi Athiyah
At the end of 2021, people are shocked by the drastically reduced supply of cooking oil and high prices. This makes people talk about it a lot through social media like Twitter. Freedom on Twitter raises many responses from the public. The number of negative and positive responses on Twitter makes comparisons between the two responses difficult to observe. This study aims to determine the comparison of positive responses and negative responses. Machine learning with the naïve Bayes method and support vector machine is able to overcome this problem. The research conducted examines how the comparison between positive responses and negative responses and which method has higher accuracy. The data used is 10,000 Indonesian language tweets. Model testing was carried out with 1839 test data. the Naive Bayes method gets an accuracy of 74.06% with the results of predicting two positive tweets and 1837 negative tweets. The SVM method was tested on linear, polynomial, RBF, and sigmoid kernels. The kernel with the highest accuracy value is the sigmoid kernel with an accuracy of 81.8% with the predicted results of 266 positive tweets and 1573 negative tweets.  
2021年底,人们对食用油供应急剧减少和价格高企感到震惊。这使得人们通过像推特这样的社交媒体谈论很多。推特上的自由引起了公众的许多反应。推特上负面和正面回应的数量使得很难对这两种回应进行比较。本研究旨在确定积极反应和消极反应的比较。使用naïve贝叶斯方法和支持向量机的机器学习能够克服这个问题。研究考察了积极反应和消极反应的比较,以及哪种方法具有更高的准确性。使用的数据是10000条印尼语推文。利用1839个试验数据进行了模型试验。朴素贝叶斯方法预测正面推文2条,负面推文1837条,准确率为74.06%。支持向量机方法在线性、多项式、RBF和s型核上进行了测试。准确率最高的核是sigmoid核,准确率为81.8%,预测结果为266条正面推文和1573条负面推文。
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引用次数: 0
Pengaruh Penambahan methanol Terhadap Emisi Bahan Bakar Mesin Sepeda Motor Berbahan Bakar Pertamax 150 CC 增加甲烷醇对发动机第15cc燃油排放的影响
Pub Date : 2023-07-29 DOI: 10.35970/infotekmesin.v14i2.1719
Faqih Fatkhurrozak, F. Sanjaya, Syarifudin Syarifudin, Andre Budhi Hendrawan, M. K. Usman, Gunawan Gunawan
Automotive vehicles have increased every year, especially motorcycles, which result in increased air pollution. The use of alternative fuel methanol is one of the solutions to control air pollution. methanol has a high oxygen content so it can improve emissions. This study aims to analyze the use of a mixture of Pertamax and methanol fuel on exhaust emissions using a 150 cc EFI gasoline engine. The percentage of methanol used in the test is 5%, 10%, and 15%. Variation of engine speed from 1000 to 3000 rpm with an interval of 1000 rpm. Measurement of exhaust emissions using a gas analyzer. The addition of methanol to Pertamax fuel reduced HC emission levels at PM15 by 34% at 3000 rpm and CO by 43% at 3000 rpm at PM15, while CO2 and O2 emission levels increased by 23% at 3000 rpm at CO2, mixing PM15 and at O2 emissions of 163% at a speed of 3000 rpm on PM5.  
汽车每年都在增加,尤其是摩托车,这导致了空气污染的增加。使用替代燃料甲醇是控制大气污染的解决方案之一。甲醇含氧量高,因此可以改善排放。本研究旨在分析使用Pertamax和甲醇燃料的混合物对使用150cc EFI汽油发动机的废气排放的影响。试验中甲醇的使用比例分别为5%、10%和15%。发动机转速从1000转到3000转,间隔1000转。使用气体分析仪测量废气排放。Pertamax燃料中添加甲醇可使PM15在3000转时的HC排放水平降低34%,PM15在3000转时的CO排放水平降低43%,而CO2和O2的排放水平在3000转时增加23%,PM5在3000转时混合PM15和O2的排放量为163%。
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引用次数: 0
Rancang Bangun Rangka dan Penggerak Mesin FDM Berbasis Arduino Tipe XZ-Head 基于Arduino XZ头的FDM机器网络及引擎构建设计
Pub Date : 2023-01-29 DOI: 10.35970/infotekmesin.v14i1.1741
Radhi Ariawan, Nur Akhlis Sarihidaya Laksana, Unggul Satria Jati, Roy Aries Permana Tarigan
FDM is an AM method that is currently being developed due to the flexibility of the object geometry that can be formed. This study aims to design the frame and drive of the XZ Head type FDM engine. Stress simulation was carried out to determine the safety factor in the frameXZ design. Lead screw parameters in the form of torque, shear stress, axial stress, and critical load were calculated to determine the torque requirement of the driving motor. The value of the linear axis of the stepper motor was calibrated to determine the dimensions of the printed output. Based on the simulation, the dynamic and static stresses on the XZ frame were 1.9 MPa and 2 MPa. The yield strength was 55 MPa with a safety factor of 28. The results of the calculation of the lead screw torque (TR) and (TL) were 18.27 N.mm and 6.60 N.mm. The calculated nominal shear stress of the screw () was 0.43 N/mm2, the axial loading stress () was -0.62 N/mm2, and the critical load (Wcr) was 9986.41 N. The difference in dimensions of the measurement results in the X and Z planes was 0.22 and 0.17 mm larger than the target dimensions of 20 mm.
FDM是一种AM方法,由于可以形成的物体几何形状的灵活性,目前正在开发中。本研究旨在设计XZ-Head型FDM发动机的机架和驱动器。进行了应力模拟,以确定框架XZ设计中的安全系数。计算了扭矩、剪切应力、轴向应力和临界载荷形式的丝杠参数,以确定驱动电机的扭矩要求。校准步进电机的线性轴的值,以确定打印输出的尺寸。基于仿真,XZ框架上的动应力和静应力分别为1.9MPa和2MPa。屈服强度为55MPa,安全系数为28。导螺杆扭矩(TR)和(TL)的计算结果分别为18.27 N.mm和6.60 N.mm。螺杆的计算标称剪切应力()为0.43 N/mm2,轴向加载应力(。
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引用次数: 0
Kajian Eksperimen Pengaruh Variasi Perubahan Sudut Kincir terhadap Kinerja Paddle Wheel Aerator
Pub Date : 2023-01-29 DOI: 10.35970/infotekmesin.v14i1.1652
Anis Mustaghfirin, Eky Novianarenti, Muhammad Abid Al Fatih, P. N. A. Nugroho, Dwi Sasmita Aji Pambudi, Dyah Arum Wulandari
The main problem discussed in this study is the effort to improve the quality of shrimp pond water, especially the low dissolved oxygen levels by modifying the angle of the aerator wheel. The results showed that dissolved oxygen (DO) levels were very important in shrimp pond culture and that the paddle wheel aerator was a useful tool in intensive aquaculture systems because it could produce DO as needed. The study used a model designed using Solidworks software and tested at a scale of 1:10 with 3 variations of angles (15°, 35°, and 55°) at each wheel angle. The test results show that the angle variation affects the rotational speed and DO production, with the highest rotational speed and DO production achieved at an angle variation of 55°. However, the best parameters for the aerator were found at a variation of the wheel angle of 35° and a rotational speed of 300 rpm, because it produced the highest dissolved oxygen with relatively low power.
本研究讨论的主要问题是通过改变曝气轮的角度来改善虾池水的水质,特别是溶解氧水平低的问题。结果表明,溶解氧(DO)水平在虾池养殖中非常重要,桨轮曝气器可以根据需要产生DO,是集约化养殖系统中一个有用的工具。该研究使用Solidworks软件设计的模型,并以1:10的比例进行测试,每个车轮角度有3种不同的角度(15°,35°和55°)。试验结果表明,角度变化影响转速和DO产量,当角度变化为55°时,转速和DO产量最高。然而,曝气机的最佳参数是在35°的车轮角度变化和300转/分的转速下,因为它以相对低的功率产生最高的溶解氧。
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引用次数: 0
Metode Pengembangan Perangkat Lunak MDLC Pada Rancang Bangun Media Pembelajaran Planet Berbasis Teknologi Augmented Reality 基于MDLC的行星媒体建筑设计软件开发方法——基于增强现实技术的学习
Pub Date : 2023-01-29 DOI: 10.35970/infotekmesin.v14i1.1689
Abdul Rohman Supriyono, Anggita Dwi Fatimah, Isa Bahroni, Linda Perdana Wanti, Muhammad Nur Faiz
Along with the development of smartphones, Augmented Reality technology has begun to be used as a medium of interaction, although it has not been properly implemented and applied as a supporting medium. The use of still image objects in textbooks can make students tend to be more passive and less interactive because media images are unable to provide a reciprocal response. In science subjects, there is solar system material regarding planet recognition. Props are needed as learning media because the object of observation from the planet is too large. Several props are used as imitations of the planets, such as the use of drawing paper, audio, and video. The purpose of this research is to make a breakthrough in the use of Augmented Reality technology to support media for understanding planet recognition material by creating digital teaching aids that can be installed on smartphone devices. The MDLC method is an alternative method for developing multimedia applications that are easy to understand. The results of the test show that the application can function as expected, where each planetary marker that has been made can be recognized properly according to the intended planetary object.
随着智能手机的发展,增强现实技术已经开始被用作一种交互媒介,尽管它还没有被适当地实施和应用作为一种支持媒介。在教科书中使用静止的图像对象会使学生倾向于被动和缺乏互动性,因为媒体图像无法提供相互的反应。在科学科目中,有关于行星识别的太阳系材料。因为从星球上观察的对象太大,所以需要道具作为学习媒介。几个道具被用来模仿行星,如使用画纸,音频和视频。本研究的目的是通过创建可安装在智能手机上的数字教学辅助工具,在使用增强现实技术来支持媒体理解行星识别材料方面取得突破。MDLC方法是开发易于理解的多媒体应用程序的另一种方法。测试结果表明,该应用程序可以按预期运行,其中已制作的每个行星标记都可以根据预期的行星物体正确识别。
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引用次数: 0
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Infotekmesin Media Komunikasi Ilmiah Politeknik Cilacap
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