Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi最新文献

ANALISIS PERFORMANCE COOLING TOWER TIPE INDUCED DRAFT COUNTER FLOW PLTP KAMOJANG UNIT 5 卡莫江5号机组冷却塔型引风逆流PLTP性能分析

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-26 DOI: 10.35308/jmkn.v8i2.6526

Hasan Abdurohman, Juli Mrihardjono, S. Darmanto

{"title":"ANALISIS PERFORMANCE COOLING TOWER TIPE INDUCED DRAFT COUNTER FLOW PLTP KAMOJANG UNIT 5","authors":"Hasan Abdurohman, Juli Mrihardjono, S. Darmanto","doi":"10.35308/jmkn.v8i2.6526","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6526","url":null,"abstract":"Cooling tower is a heat exchanger used to cool water from the condenser. The process is carried out by contacting water with air directly and discharged into the atmosphere using air fluid that is flowed naturally or flowed by a fan. Cooling tower type used in PLTP Kamojang Unit 5 is Induced draft Counter Flow. This equipment more important in increasing turbine efficiency, therefore special treatment is needed by knowing and observing the performance of the Cooling tower so that it can be analyzed in actual conditions and make decision steps in carrying out further repairs and maintenance, this is the basis of research that will be carried out by looking for value and the Cooling tower performance trendline. The calculation method uses the standard ASME PTC 23-2003 and CTI ATC-105 where the results are the calculation baseline and the historical trendline of Cooling tower performance based on the parameters of the 3-cell Cooling tower operating conditions. The parameters tested are by taking 5 valid data on PLTP KMJ Unit 5, then the Tower Capability performance values are obtained as follows, namely in the initial commissioning conditions the performance value is 92,1%, Q1 2021 is 78,8%, Q3 2021 is 74, 3%, Q4 2021 is 84,7%, and Q1 2022 is 83,8%. There was a decrease in Q3 2021. Then there was an increase in the trend in Q4 2021 due to previous overhaul activities on the Cooling tower. Keywords: Cooling tower, trendline, overhaul, tower capability","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128223349","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}

引用次数: 0

Karakteristik Pola Aliran Air-Udara, Campuran Air+Gliserin (G20)-Udara, dan Campuran Akuades+Butanol 4%-Udara Pada Pipa Horizontal Berukuran Mini 典型的空气流动模式，空气和水+甘油(G20)的空气混合物，以及水合物+丁醇+的460%的空气在一个微型水平管道中混合

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-26 DOI: 10.35308/jmkn.v8i2.6470

F. Jayadi, Sudarja Sudarja, Eli Komolosari

{"title":"Karakteristik Pola Aliran Air-Udara, Campuran Air+Gliserin (G20)-Udara, dan Campuran Akuades+Butanol 4%-Udara Pada Pipa Horizontal Berukuran Mini","authors":"F. Jayadi, Sudarja Sudarja, Eli Komolosari","doi":"10.35308/jmkn.v8i2.6470","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6470","url":null,"abstract":"This study aims to obtain information about the flow characteristics of Water-Air Flow, Mixture of Glycerin+Water(G20)-Air, and Mixture of Aquadest+Butanol 4%-Air. The two-phase flow characteristics in mini-sized pipes have significant differences with the two-phase flow characteristics in conventional pipes, so it will affect fluid distribution processes involving two-phase flow such as heat transfer processes. Therefore, it is necessary to conduct further studies on the two-phase flow pattern in mini-sized pipes. This research was conducted in a test section in the form of a glass pipe with a diameter of 1.6 mm in a horizontal position. The liquid fluid used is water which has a surface tension (σ) of 71 mN/m, a mixture of glycerin+water (G20) has a surface tension (σ) of 62.5 mN/m, and a mixture of distilled water+butanol 4% has a surface tension (σ) of 36.50 mN/m. Superficial velocity of gas (JG)=0.033–4.935 m/s, and superficial velocity of liquid (JL)=0.025–66.3 m/s. The results showed that stratified flow was not observed in the mini channel as can be found in conventional pipes. The detected flow patterns are: bubbly, slug, slug-annular, churn, and annular. The results of flow pattern maps compared with flow pattern maps from Triplett et al (1999a), Chung and Kawaji (2004) and Sudarja et al (2014), and Aqli et al (2015) show that the higher the viscosity, the higher the annular churn-slug flow transition line will be. decreases while the annular – slug annular transition line tends to be more sloping. ","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122615053","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}

引用次数: 0

Performa Solar Water Heater Collector Dengan Menggunakan Reflektor Dan Variasi Laju Aliran Air

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-24 DOI: 10.35308/jmkn.v8i2.6535

Masykur Masykur, M. Saputra, F. Jayadi, Al Munawir, J. Supardi, Muazar Muazar

引用次数: 0

ANALISA PERBANDINGAN HASIL UJI TARIK PADA BEBERAPA SPESIMEN DENGAN LOAD CELL BERKAPASITAS 500 KN 对多个样本的pull测试结果进行分析，并将其与一个500载的加载单元进行比较

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-16 DOI: 10.35308/jmkn.v8i2.6418

Irfan Al Ayubbi, Seno Darmanto, Didik Ariwibowo

{"title":"ANALISA PERBANDINGAN HASIL UJI TARIK PADA BEBERAPA SPESIMEN DENGAN LOAD CELL BERKAPASITAS 500 KN","authors":"Irfan Al Ayubbi, Seno Darmanto, Didik Ariwibowo","doi":"10.35308/jmkn.v8i2.6418","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6418","url":null,"abstract":"Many tensile tests are carried out to complete the basic design information of the strength of a material and as supporting data for material specifications. In the tensile test, the test object is given a load of tensile force that increases continuously, at the same time observations are made regarding the extension experienced by the test object. This study aims to determine the mechanical properties and their changes from a metal to tensile loading using qualitative methods and data collection methods using literature review. The study is carried out by collecting data through a literature book related to the object of the final project. The test results of the material that has the smallest value, namely Aluminum, are obtained, the value without heat treatment is Voltage = 566 N / mm2, Strain = 7.9 , ME = 72.1 N / mm2) and the value using heat treatment is Voltage = 439 N / mm2), Strain = 3.5, ME = 124.5 N / mm2). While the largest value, namely Iron Concrete TP 280, was obtained, the value without heat treatment was Voltage = 1012 N / mm2, Strain = 6.5 , ME = 156.4 N / mm2). While the values when using heat treatment are Voltage = 729 N / mm2), Strain = 3.7, ME =198.8 N / mm2). It can be concluded that the results of the comparative analysis of the strength of the test material without heat treatment and using heat treatment are known when the material is heated until it is close to its critical point, the material will form a new property that will make it change its properties to be tenacious or brittle.Keywords : Tensile Test, Stress, Strain, ME \"Modulus of Elasticity\", Heat Treatment","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123679083","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}

引用次数: 0

Penambahan Katalik Konverter Plat Tembaga Berbentuk Spiral Terhadap Emisi Gas Buang Motor Bakar Menggunakan Gasboard 5020 使用5020发动机垫圈对燃气尾气排放的螺旋型铜盘转换器的加法

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-15 DOI: 10.35308/jmkn.v8i2.6414

M. Daryono, Seno Darmanto

引用次数: 0

KAJIAN EKSPERIMEN PENGGUNAAN SOLAR CELL SEBAGAI ALTERNATIF PENGISIAN AKUMULATOR 200Ah 12 Volt MESIN DIESEL PLTD

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-12 DOI: 10.35308/jmkn.v8i2.6413

Bakharuddin Yusuf, Seno Darmanto, S. Handayani, Susastro Susastro

引用次数: 0

REDESIGN PULVERIZER SHAFT UNIT 2 DI PLTU SEKTOR BUKIT ASAM 4 X 65 MW

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-07 DOI: 10.35308/jmkn.v8i2.6412

Arief Prakoso Hardyanto, Wiji Mangestiyono, Seno Darmanto, Murni Murni

{"title":"REDESIGN PULVERIZER SHAFT UNIT 2 DI PLTU SEKTOR BUKIT ASAM 4 X 65 MW","authors":"Arief Prakoso Hardyanto, Wiji Mangestiyono, Seno Darmanto, Murni Murni","doi":"10.35308/jmkn.v8i2.6412","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6412","url":null,"abstract":"In the operation of the Bukit Asam power plant, in all generating units there are many disturbances that can cause derating the units. Derating of the unit can occur due to decrease in the performance of the steam turbine, decrease in the reliability of the pulverizer, and also disturbances in the coal supply system and various factors. Based on the performance data of the Bukit Asam Generation Sector (Monthly disturbance report) in January 2014, there were 54 derating disturbances recorded. One of the causes of the derating was a broken Pulverizer Shaft with a loss of operating hours for 196.78 [hours] which caused an unallocated electricity loss of 12,422 [GWh]. With the realization of AFI (Action For Improvement) in this final project creation assignment, it aims to redesign the shaft pulverizer, as well as analyze the causes of the pulverizer shaft break. By redesigning the pulverizer shaft and analyzing the cause of the pulverizer shaft breaking, it was found that the cause of the fracture of the shaft made from AISI 1045 with the old design was from calculating the shear stress value of 48.44 x 107 [N/m2], this result exceeded the value of the material permit voltage of 31.8 x 107 [N/m2], so it was not safe to use and the service life was not long. The results of the redesign shaft changed the dimensions of the diameter of the shaft head which was previously 0.174 [m] in diameter to a dwelling of 0.25 [m]. The results of calculating the redesign shaft made from AISI 1045 obtained a shear stress value of 16.33 x 107 [N/m2], this result is smaller than the material clearance voltage value of 31.8 x 107 [N/m2], so it is safer with a relatively longer service life.Keywords: Derating, Pulverizer Shaft, material, Redesign, Shear Stress","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121930960","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}

引用次数: 0

Rancang Bangun Mesin Pelangsiran Material Konstruksi Tower Transmisi Sistem Crane Pulley dengan Kapasitas Maksimal 250 kg 设计一台建筑材料评估机器，传输塔形传动系统最高可容纳500磅(250公斤)的起重机系统

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-05 DOI: 10.35308/jmkn.v8i2.6409

Alaya Fadllu Hadi Mukhamad, Seno Darmanto, Firdaus Kurniawan Haqni

{"title":"Rancang Bangun Mesin Pelangsiran Material Konstruksi Tower Transmisi Sistem Crane Pulley dengan Kapasitas Maksimal 250 kg","authors":"Alaya Fadllu Hadi Mukhamad, Seno Darmanto, Firdaus Kurniawan Haqni","doi":"10.35308/jmkn.v8i2.6409","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6409","url":null,"abstract":"Material shredders are used in construction projects to move materials from the starting point to the intended point. This trimming machine uses a type or system of crane pulley. In the world of construction, it can rarely be used in various terrains, whether flat terrain, valley terrain, or hilly terrain. Therefore, this paper aims to ensure that the process of upgrading / transferring the construction material of the 150 kV transmission tower can run well on flat terrain to difficult terrain such as valleys and hills based on several consideration factors. The design process of the material shredder consists of three stages, namely design, tool making, and tool testing. The design process consists of several stages, namely field review and the availability of supporting systems and raw materials. The fabrication process, carries out the assembly of materials that are already available by the predetermined design. The process of testing the tool, using the test method directly in the field so that the data presented is real loading data. The material drill engine can be used well in the field with a maximum carrying capacity of 250 kg with the highest effective tool capacity of 12,424kg/hour and fuel sed as much as 0.91 liters/hourKeywords : Design and Construction, Solidworks, Material Transfer Tool, Shifting Machine, Material Mover","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132923829","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}

引用次数: 0

Studi Eksperimental Pengaruh Konfigurasi Penampang Sekat Terhadap Kinerja Novel Cooling Tower Prototype 实验截面配置对冷却塔原型小说的工作影响

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-03 DOI: 10.35308/jmkn.v8i2.6190

Dedi Afandi, Ahmad Syuhada, Ratna Sary, Z. Zulfan, Asra Yufandi

{"title":"Studi Eksperimental Pengaruh Konfigurasi Penampang Sekat Terhadap Kinerja Novel Cooling Tower Prototype","authors":"Dedi Afandi, Ahmad Syuhada, Ratna Sary, Z. Zulfan, Asra Yufandi","doi":"10.35308/jmkn.v8i2.6190","DOIUrl":"https://doi.org/10.35308/jmkn.v8i2.6190","url":null,"abstract":"Cooling towers are widely applied in industries such as power plants and oil refineries, where the equipment produces excess heat that needs to be removed. The effect of baffles configuration on the performance of the novel cooling tower prototype was studied experimentally. The configuration of the baffles used is the baffle section without holes, the baffle section with 15 holes, the baffle section with 25 holes, and the baffle section with 35 holes. The water inlet temperature was varied, namely 55⁰C, 75⁰C, and 90⁰C. water is flowed from the main reservoir to the upper reservoir of the cooling tower using a pump, and water from the upper reservoir falls on the baffles of the cooling tower. Inlet water temperature, outlet water temperature, and water temperature at each baffle were measured using a thermocouple. The results showed that the cooling tower with a baffle of 35 holes produced the most optimal performance. The heat transfer rate produced by the cooling tower with a 35-hole baffle at an inlet temperature of 55⁰C is 624.64 Watts. At the water inlet temperature of 75⁰C, the average heat transfer rate produced by the cooling tower with a 35-hole baffle increased by 42.6%. The average heat transfer rate produced by a cooling tower with a 35-hole baffle at a water inlet temperature of 90⁰C increased by 62.6%. This is because the cooling tower with a baffle of 35 holes causes the water droplets that pass through the baffle to split into more and more so that the heat transfer rate is higher.","PeriodicalId":166109,"journal":{"name":"Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128674795","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}

引用次数: 0

RANCANG BANGUN ALAT FIXED STEERING ROLLER UNTUK MENCEGAH MISTRACKING PADA BELT CONVENER

Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Pub Date : 2022-11-01 DOI: 10.35308/jmkn.v8i2.6303

Yuniar Anis Budiharja, Seno Darmanto, W. Mangestiyono

引用次数: 0