R. Sumiati, M. L. Artia, U. G. S. Dinata, Adek Tasri, Gusriwandi Gusriwandi
Wind energy is a resource that is abundant, environmentally friendly, and renewable, therefore it has the potential to be developed. Savonius vertical axis type is suitable for application in low wind speed conditions. The Savonius wind turbine has good self-starting so that it is able to rotate the rotor even though the wind speed is low, besides that the torque it produces is relatively high. This study aims to determine how differences in OR affect the performance of Savonius turbines with an aspect ratio (AR) of 2. The experimental method was applied in this research to investigate the characteristic Cp of the model using the wind tunnel with different overlap ratios of 0.1, 0.15, 0.2, 0.25, and 0.3. The wind turbine model that has been made using a 3D printing process made of PLA + material. The results obtained in each OR test are the maximum Cp value for the variation OR 0.1, which is 0.121, OR 0.15, the maximum Cp value obtained is 0.213, OR 0.2, the maximum Cp value is 0.245, OR 0.25, the maximum Cp value is 0.224 and OR 0.3, the maximum Cp value is 0.210. Based on the five overlap variations, the maximum Cp ratio is obtained at OR = 0.2, namely Cp = 0.245 and TSR = 0.7. The OR value of 0.2 is able to maximize turbine power and minimize negative torque because the flow through the overlap area can maximally direct wind power to the maximum backward blade.
{"title":"Pengaruh Overlap Ratio pada Model Turbin Savonius terhadap Karakteristik Koefisien Daya Berdasarkan Eksperimen Pada Wind Tunnel","authors":"R. Sumiati, M. L. Artia, U. G. S. Dinata, Adek Tasri, Gusriwandi Gusriwandi","doi":"10.30630/jtm.15.2.971","DOIUrl":"https://doi.org/10.30630/jtm.15.2.971","url":null,"abstract":"Wind energy is a resource that is abundant, environmentally friendly, and renewable, therefore it has the potential to be developed. Savonius vertical axis type is suitable for application in low wind speed conditions. The Savonius wind turbine has good self-starting so that it is able to rotate the rotor even though the wind speed is low, besides that the torque it produces is relatively high. This study aims to determine how differences in OR affect the performance of Savonius turbines with an aspect ratio (AR) of 2. The experimental method was applied in this research to investigate the characteristic Cp of the model using the wind tunnel with different overlap ratios of 0.1, 0.15, 0.2, 0.25, and 0.3. The wind turbine model that has been made using a 3D printing process made of PLA + material. The results obtained in each OR test are the maximum Cp value for the variation OR 0.1, which is 0.121, OR 0.15, the maximum Cp value obtained is 0.213, OR 0.2, the maximum Cp value is 0.245, OR 0.25, the maximum Cp value is 0.224 and OR 0.3, the maximum Cp value is 0.210. Based on the five overlap variations, the maximum Cp ratio is obtained at OR = 0.2, namely Cp = 0.245 and TSR = 0.7. The OR value of 0.2 is able to maximize turbine power and minimize negative torque because the flow through the overlap area can maximally direct wind power to the maximum backward blade.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82597671","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}
M. Hakim, Erik Heriana, Zaenal Muttaqien, Sony Sukmara
Large capacity cutting machines are rarely owned by some people because of the expensive machine prices, for small scale or home based industries, the problem in this study is the slow processing time, where they are required to be able to compete with large industries but only by relying on high-capacity cutting machines. small. Of the several existing cutting machines there are still deficiencies, so a modification of the slider is carried out. This refinement aims to be able to vary the cutting pattern in one motion. In this study using the reel method, where the sliding rail can rotate 1800. The cutting force that occurs is 61.6 N with a cutting speed of 324 m/s on yaku mahogany cutting media with an allowable bending of 10.4 kg/mm2. The recommended shaft diameter is based on a calculation of 5.7 mm, the shaft diameter used is 12 mm, with a fatigue safety factor value. and the allowable bending stress is 122.6 N/mm2, while the shear stress at the weld section is 1.33 N/mm2. This tool is very safe to use because the allowable shear stress is 122.6 N/mm2. As a result of this modification of the cutting tool, it was successful in making pieces of wood with varied patterns in one cutting motion and shorter processing time.
{"title":"Rancangan Mesin Pemotong Kayu Menggunakan Rell Penggeser Dengan Motor Penggerak Daya 400 Watt","authors":"M. Hakim, Erik Heriana, Zaenal Muttaqien, Sony Sukmara","doi":"10.30630/jtm.15.2.913","DOIUrl":"https://doi.org/10.30630/jtm.15.2.913","url":null,"abstract":"Large capacity cutting machines are rarely owned by some people because of the expensive machine prices, for small scale or home based industries, the problem in this study is the slow processing time, where they are required to be able to compete with large industries but only by relying on high-capacity cutting machines. small. Of the several existing cutting machines there are still deficiencies, so a modification of the slider is carried out. This refinement aims to be able to vary the cutting pattern in one motion. In this study using the reel method, where the sliding rail can rotate 1800. The cutting force that occurs is 61.6 N with a cutting speed of 324 m/s on yaku mahogany cutting media with an allowable bending of 10.4 kg/mm2. The recommended shaft diameter is based on a calculation of 5.7 mm, the shaft diameter used is 12 mm, with a fatigue safety factor value. and the allowable bending stress is 122.6 N/mm2, while the shear stress at the weld section is 1.33 N/mm2. This tool is very safe to use because the allowable shear stress is 122.6 N/mm2. As a result of this modification of the cutting tool, it was successful in making pieces of wood with varied patterns in one cutting motion and shorter processing time.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84620840","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}
The axle shaft is a component of the power transfer system which often experiences mechanical failure. The purpose of this study was to determine the degree of fatigue and hardness of metal shafts with variations in frictional load as information on friction welding recommendations on metal shafts. The research method used is the experimental method, which is a way to compare specimens with variations in friction welding loads of 2 kg, 4 kg, and 6 kg using the Rockwell method of hardness testing and fatigue testing using a rotary bending machine. From the research results it is recommended that friction welding on metal axle shafts can be carried out with a friction load of 6 kg because from the results of the fatigue test SPBG6 has the highest average fatigue strength compared to SPBG2 and SPBG4. This was reinforced by the results of the SPBG6 hardness test which showed the lowest hardness level for the parent metal at 80.44 HRA.
{"title":"Analisa Analisa Kelelahan Dan Kekerasan Pada Logam Axle shaft Dengan Pengelasan Gesek","authors":"Muhammad Faisal, A. Asrul","doi":"10.30630/jtm.15.2.964","DOIUrl":"https://doi.org/10.30630/jtm.15.2.964","url":null,"abstract":"The axle shaft is a component of the power transfer system which often experiences mechanical failure. The purpose of this study was to determine the degree of fatigue and hardness of metal shafts with variations in frictional load as information on friction welding recommendations on metal shafts. The research method used is the experimental method, which is a way to compare specimens with variations in friction welding loads of 2 kg, 4 kg, and 6 kg using the Rockwell method of hardness testing and fatigue testing using a rotary bending machine. From the research results it is recommended that friction welding on metal axle shafts can be carried out with a friction load of 6 kg because from the results of the fatigue test SPBG6 has the highest average fatigue strength compared to SPBG2 and SPBG4. This was reinforced by the results of the SPBG6 hardness test which showed the lowest hardness level for the parent metal at 80.44 HRA.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74294592","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}
Muhammad Rifqi Aditya, Armila Armila, Rudi Kurniawan Arief
Analysis of the design of this energy-efficient stove for distributing the results from the HHO (Hydrogen Hydrogen Oxygen) generator and turning this HHO into a fire. The purpose of this analysis is to determine the strength of the stove frame with the maximum load it can accommodate. This stove is made with a design and structure that is larger in scale with new innovations that combine metal materials and concrete materials where the two materials are combined to create a sturdy and strong stove structure, the structure of this stove is innovated from the stove in general. The result of the force diagram shows that the bending stress of the weld seam is smaller than the allowable stress of the material, namely: wb = 8, 03×10-3 180 N/mm2. Therefore the stove is safe to use.
{"title":"Analisis Rancangan Rangka Kompor Hemat Energi Berbahan Bakar Air","authors":"Muhammad Rifqi Aditya, Armila Armila, Rudi Kurniawan Arief","doi":"10.30630/jtm.15.2.888","DOIUrl":"https://doi.org/10.30630/jtm.15.2.888","url":null,"abstract":"Analysis of the design of this energy-efficient stove for distributing the results from the HHO (Hydrogen Hydrogen Oxygen) generator and turning this HHO into a fire. The purpose of this analysis is to determine the strength of the stove frame with the maximum load it can accommodate. This stove is made with a design and structure that is larger in scale with new innovations that combine metal materials and concrete materials where the two materials are combined to create a sturdy and strong stove structure, the structure of this stove is innovated from the stove in general. The result of the force diagram shows that the bending stress of the weld seam is smaller than the allowable stress of the material, namely: wb = 8, 03×10-3 180 N/mm2. Therefore the stove is safe to use.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78703910","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}
The oil production process is the process of extracting oil from the reservoir using the wells that have been made. In the production process there are three stages, namely primary recovery, secondary recovery and tertiary recovery. At the primary recovery stage there are two methods, namely production using natural reservoir energy (natural flow) and production using artificial lift methods (artificial lift). There are two basic principles of artificial lift, namely gas lift and pumps. The principle of the gas lift is to inject gas into the bottom of the well thereby reducing the density and pressure gradient of the reservoir fluid so that the fluid flows more easily. While the principle of the pump is to provide additional energy (head) to lift the fluid. The type of pump that is often used for shallow wells is Sucker Rod Pump. The performance of the sucker rod pump is influenced by the characteristics of the well and reservoir such as pressure, well productivity, physical properties of the fluid, as well as the depth of the well and the dimensions of the sucker rod pump. In this study, the factors studied were the physical properties of the fluid, namely the API of the fluid with variations of API 15o and API 45o, as well as the pump volumetric efficiency (Ev) of 90% and 70%. From the analysis carried out, the results obtained a). For API 15° and Ev 90% fluids: 759 stb/day and 39 hp prime mover power; and for API 15° and Ev 70%: 591 stb/day and prime mover power of 32.2 hp. b). For API 45° and Ev 90% fluids: 783 stb/day and prime mover power of 34.3 hp; and for API 45° and Ev 70%: 609 stb/day and prime mover power of 28.6 hp.
{"title":"Analisa Unjuk Kerja Sucker Rod Pump C-228 D – 213 – 86-7466 Sebagai Metode Pengangkatan Buatan Produksi Minyak Bumi untuk API 15° dan 45°","authors":"Edward Hamid Muhammad, Hadziqul Abror, Eriska Eklezia Dwi Saputri, Riska Laksmita Sari, Welayaturromadhona Welayaturromadhona","doi":"10.30630/jtm.15.2.945","DOIUrl":"https://doi.org/10.30630/jtm.15.2.945","url":null,"abstract":"The oil production process is the process of extracting oil from the reservoir using the wells that have been made. In the production process there are three stages, namely primary recovery, secondary recovery and tertiary recovery. At the primary recovery stage there are two methods, namely production using natural reservoir energy (natural flow) and production using artificial lift methods (artificial lift). There are two basic principles of artificial lift, namely gas lift and pumps. The principle of the gas lift is to inject gas into the bottom of the well thereby reducing the density and pressure gradient of the reservoir fluid so that the fluid flows more easily. While the principle of the pump is to provide additional energy (head) to lift the fluid. The type of pump that is often used for shallow wells is Sucker Rod Pump. The performance of the sucker rod pump is influenced by the characteristics of the well and reservoir such as pressure, well productivity, physical properties of the fluid, as well as the depth of the well and the dimensions of the sucker rod pump. In this study, the factors studied were the physical properties of the fluid, namely the API of the fluid with variations of API 15o and API 45o, as well as the pump volumetric efficiency (Ev) of 90% and 70%. From the analysis carried out, the results obtained a). For API 15° and Ev 90% fluids: 759 stb/day and 39 hp prime mover power; and for API 15° and Ev 70%: 591 stb/day and prime mover power of 32.2 hp. b). For API 45° and Ev 90% fluids: 783 stb/day and prime mover power of 34.3 hp; and for API 45° and Ev 70%: 609 stb/day and prime mover power of 28.6 hp.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"44 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72440370","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}
Pub Date : 2022-10-31DOI: 10.21063/jtm.2022.v12.i2.120-123
I. Eka Putra, Haleri Echo Yeyen Hidayat
The corrosion process occurs in almost all materials, especially metals, slowly but surely, which can cause a material to have a limited service life. Corrosion cannot be prevented but the rate can be reduced. One of t he methods to inhibit the effective corrosion rate is by giving epoxy primer treatment. This study aims to examine the effect of adding epoxy primer on the corrosion rate of low carbon steel immersed in a 5.25% Calcium hypochlorite solution. This research was conducted using 27 specimens in 9 vessels, each vessel contained 3 specimens immersed in low carbon steel without treatment, oil paint and epoxy primer. Volume of 1 liter of solution for 1 vessel. The results of this study indicate that the epoxy primer is able to inhibit the corrosion rate well. The reduction in weight of low carbon steel treated with oil paint is much greater than that of untreated low carbon steel using epoxy primer. The lowest corrosion rate was given by applying epoxy primer in 30 days of immersion with an average value of 0.001001695 mpy and the highest corrosion rate without treatment in 15 days of immersion with an average value of 0.005008473 mpy.
{"title":"The Effect of Adding Prim ary Epoxy on the Corrosion Rate of Low Carbon Steel in 5.25% Calcium Hypochlorite Solution","authors":"I. Eka Putra, Haleri Echo Yeyen Hidayat","doi":"10.21063/jtm.2022.v12.i2.120-123","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i2.120-123","url":null,"abstract":"The corrosion process occurs in almost all materials, especially metals, slowly but surely, which can cause a material to have a limited service life. Corrosion cannot be prevented but the rate can be reduced. One of t he methods to inhibit the effective corrosion rate is by giving epoxy primer treatment. This study aims to examine the effect of adding epoxy primer on the corrosion rate of low carbon steel immersed in a 5.25% Calcium hypochlorite solution. This research was conducted using 27 specimens in 9 vessels, each vessel contained 3 specimens immersed in low carbon steel without treatment, oil paint and epoxy primer. Volume of 1 liter of solution for 1 vessel. The results of this study indicate that the epoxy primer is able to inhibit the corrosion rate well. The reduction in weight of low carbon steel treated with oil paint is much greater than that of untreated low carbon steel using epoxy primer. The lowest corrosion rate was given by applying epoxy primer in 30 days of immersion with an average value of 0.001001695 mpy and the highest corrosion rate without treatment in 15 days of immersion with an average value of 0.005008473 mpy.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75127499","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}
Pub Date : 2022-10-31DOI: 10.21063/jtm.2022.v12.i2.92-97
Romiyadi, Yudi Dwianda, Adi Febrianton, Purnama Irwan
Elephant grass and palm frond chopping machines is a machine used to chop elephant grass and palm fronds for animal feed. The purpose of the study is to design and manufacture a machine used for animal feed. This machine is designed and manufactured to chop elephant grass and palm fronds. Based on the results of the design and manufacture, a machine for chopping elephant grass and palm fronds for animal feed has been designed and manufactured. This machine uses a gasoline motor with a capacity of 5.5 HP. While the transmission system used is a pulley and belt transmission system. Based on the test results, the elephant grass and palm frond chopping machine can operate and function properly. The test results also show that the volume of chopped elephant grass is greater than the volume of chopped palm fronds. While the results of chopped elephant grass are better than the results of chopped palm fronds
{"title":"Design and Manufacture of Elephant Grass and Palm Frond Chopping Machines","authors":"Romiyadi, Yudi Dwianda, Adi Febrianton, Purnama Irwan","doi":"10.21063/jtm.2022.v12.i2.92-97","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i2.92-97","url":null,"abstract":"Elephant grass and palm frond chopping machines is a machine used to chop elephant grass and palm fronds for animal feed. The purpose of the study is to design and manufacture a machine used for animal feed. This machine is designed and manufactured to chop elephant grass and palm fronds. Based on the results of the design and manufacture, a machine for chopping elephant grass and palm fronds for animal feed has been designed and manufactured. This machine uses a gasoline motor with a capacity of 5.5 HP. While the transmission system used is a pulley and belt transmission system. Based on the test results, the elephant grass and palm frond chopping machine can operate and function properly. The test results also show that the volume of chopped elephant grass is greater than the volume of chopped palm fronds. While the results of chopped elephant grass are better than the results of chopped palm fronds","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87357111","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}
Pub Date : 2022-10-31DOI: 10.21063/jtm.2022.v12.i2.104-109
Dedi Wardianto, Marfizal, Sufiyanto
PT. Kurnia Batang Hari is a palm oil processing factory into palm oil. At PT KBHB there is a tool called “Steam Turbine Generator Type RB5” which functions as a power generator. This study aims to determine the effect of the load on the mass flow rate, turbine generator power, and determine the efficiency of the steam turbine generator. The research method is to take boiler and turbine data directly for 1 week. Get the enthalpy value from the steam table and can calculate based on the research objective. Based on the research conducted, it was found that the highest average flow rate on Wednesday was 3.48 kg/s. The highest generator power yield on Sunday is 1661 KW. The results of the calculation of the highest average generator efficiency on Sundays are 57.11%. Conclusion It can be seen that if the load on the turbine is getting bigger, then the mass flow rate of the steam will be even bigger and it also depends on the pressure of the steam entering and leaving the turbine. The average load of 1 week borne by the generator is 885 KW and the mass flow rate is 3.81 kg/s. The generator power produced during processing is an average of 1 week, which is 1600 KW. The average efficiency of the generator in 1 week is 55.52% on Sunday.
PT. Kurnia Batang Hari是一家棕榈油加工厂。在PT KBHB有一个工具被称为“RB5型蒸汽涡轮发电机”，它的功能是发电机。本研究旨在确定负荷对质量流量、汽轮发电机功率的影响，确定汽轮发电机的效率。研究方法是直接取锅炉和汽轮机数据1周。从蒸汽表中得到焓值，并可根据研究目标进行计算。研究结果显示，当天的最高平均流速为3.48 kg/s。周日发电机组最高发电量为1661 KW。周日发电机组最高平均效率计算结果为57.11%。可以看出，当汽轮机上的负荷越来越大时，蒸汽的质量流量也会越来越大，这也取决于进入和离开汽轮机的蒸汽的压力。发电机1周平均负荷为885 KW，质量流量为3.81 kg/s。加工过程中产生的发电机功率平均为1周，即1600kw。周日发电机组1周的平均效率为55.52%。
{"title":"Effect Of Electric Load On Steam Flow Rate At Steam Turbine As Generator","authors":"Dedi Wardianto, Marfizal, Sufiyanto","doi":"10.21063/jtm.2022.v12.i2.104-109","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i2.104-109","url":null,"abstract":"PT. Kurnia Batang Hari is a palm oil processing factory into palm oil. At PT KBHB there is a tool called “Steam Turbine Generator Type RB5” which functions as a power generator. This study aims to determine the effect of the load on the mass flow rate, turbine generator power, and determine the efficiency of the steam turbine generator. The research method is to take boiler and turbine data directly for 1 week. Get the enthalpy value from the steam table and can calculate based on the research objective. Based on the research conducted, it was found that the highest average flow rate on Wednesday was 3.48 kg/s. The highest generator power yield on Sunday is 1661 KW. The results of the calculation of the highest average generator efficiency on Sundays are 57.11%. Conclusion It can be seen that if the load on the turbine is getting bigger, then the mass flow rate of the steam will be even bigger and it also depends on the pressure of the steam entering and leaving the turbine. The average load of 1 week borne by the generator is 885 KW and the mass flow rate is 3.81 kg/s. The generator power produced during processing is an average of 1 week, which is 1600 KW. The average efficiency of the generator in 1 week is 55.52% on Sunday.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77067004","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}
Pub Date : 2022-10-31DOI: 10.21063/jtm.2022.v12.i2.116-119
H. Hafni, Rifqi
Shielded Metal Arc Welding (SMAW) is one of the liquid welding processes (fusion welding) that produces a homogeneous fusion of the electrode with the base metal (base metal), which is caused by an electric arc that generates high heat to melt the electrode and base metal (base metal). simultaneously and protected by a shielding gas from the chemical reaction of the electrode flux. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted at the Mechanical Engineering Laboratory of the Padang Institute of Technology. The base metal used is low carbon steel ST 37 with a thickness of 10 mm and a length of 100 mm. width 100 mm. Welding is carried out on the surface of the base metal in the flat position, the type of connection (weld type) is a surfacing weld with 4 welding lines, each strip having a distance of 20 mm. Weld length 100 mm. AWS E6013 electrode specifications with a diameter of 3.2 mm. SMAW welding machine AC current with a voltage of 30 V. current 85 A. The measured electrode angle between the electrode and the welding line is 75o, 85o, 90o. The backward welding direction where the electrode draws the welding fluid into the welding path and the normal arc height where the distance between the electrode and the base metal is equal to the diameter of the electrode. From the welding results, a penetration presentation will be obtained, namely the ratio of the depth of fusion to the width. The research results obtained welding speed: 2.48 mm/s for electrode angle 75o, 2.49 mm/s for electrode angle 85o and 2.51 mm/s for electrode angle 90o. Heat input for electrode angle 750 is 1015.93 J/ mm , the heat input for the electrode angle 85o is 1024.20 J/mm and the heat input for the electrode angle 90o is 1015.93 J/mm. From the comparison of the width with the depth of fusion, it is obtained; The electrode angle 85o has a penetration presentation of 9.85%, which is better in height than the electrode angle 75o, which has a penetration presentation of 8.43%, and the electrode angle 90o has a penetration presentation of 8.35%..
{"title":"The Effect of Electrode Angle on the Backward Directional Longitudinal Against Penetration Percentage","authors":"H. Hafni, Rifqi","doi":"10.21063/jtm.2022.v12.i2.116-119","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i2.116-119","url":null,"abstract":"Shielded Metal Arc Welding (SMAW) is one of the liquid welding processes (fusion welding) that produces a homogeneous fusion of the electrode with the base metal (base metal), which is caused by an electric arc that generates high heat to melt the electrode and base metal (base metal). simultaneously and protected by a shielding gas from the chemical reaction of the electrode flux. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted at the Mechanical Engineering Laboratory of the Padang Institute of Technology. The base metal used is low carbon steel ST 37 with a thickness of 10 mm and a length of 100 mm. width 100 mm. Welding is carried out on the surface of the base metal in the flat position, the type of connection (weld type) is a surfacing weld with 4 welding lines, each strip having a distance of 20 mm. Weld length 100 mm. AWS E6013 electrode specifications with a diameter of 3.2 mm. SMAW welding machine AC current with a voltage of 30 V. current 85 A. The measured electrode angle between the electrode and the welding line is 75o, 85o, 90o. The backward welding direction where the electrode draws the welding fluid into the welding path and the normal arc height where the distance between the electrode and the base metal is equal to the diameter of the electrode. From the welding results, a penetration presentation will be obtained, namely the ratio of the depth of fusion to the width. The research results obtained welding speed: 2.48 mm/s for electrode angle 75o, 2.49 mm/s for electrode angle 85o and 2.51 mm/s for electrode angle 90o. Heat input for electrode angle 750 is 1015.93 J/ mm , the heat input for the electrode angle 85o is 1024.20 J/mm and the heat input for the electrode angle 90o is 1015.93 J/mm. From the comparison of the width with the depth of fusion, it is obtained; The electrode angle 85o has a penetration presentation of 9.85%, which is better in height than the electrode angle 75o, which has a penetration presentation of 8.43%, and the electrode angle 90o has a penetration presentation of 8.35%..","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78162992","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}
Pub Date : 2022-10-31DOI: 10.21063/jtm.2022.v12.i2.131-137
P. Pratiwi, Abdul Rahman, Asmara Yanto
Natural fiber composite materials have been widely applied for various purposes, one of which is reducing noise. Many efforts have been tried to reduce noise by using sound absorbing materials such as glasswool, rockwool, and gypsum as sound absorbers, but because of the high price and bad impact on health, many studies have been conducted to find materials that are practical, cheap, and abundant availability in nature, one of which is natural fiber as an alternative to commercial sound absorbing materials. In this study, we want to know the effect of the composition of palm fronds with polyester resin can affect the sound absorption of a material and the effect of composition on sound absorption. The composition of palm frond fiber and polyester resin was varied 60%:40%, 65%:35%, 70%:30%, 75%:25%, 80%:20%, 85%:15%, 90%:10%, arranged randomly with a length of 5 mm. The specimen synthesis process starts with cutting the palm fronds, decomposing the palm frond fibers so that the fibers are separated from the flesh. Acoustic testing was conducted using a single microphone impedance tube. The test results showed that the largest absorption coefficient value is 0.984 at a frequency of 1500 Hz and is obtained in materials with a composition of 70%: 30%, and for the largest acoustic impendance value is 1.714 which is found at a frequency of 500 Hz and is obtained in the composition of 85%: 15%.
{"title":"Measurement of the sound absorption coefficient of palm frond fiber composites with synthetic adhesives","authors":"P. Pratiwi, Abdul Rahman, Asmara Yanto","doi":"10.21063/jtm.2022.v12.i2.131-137","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i2.131-137","url":null,"abstract":"Natural fiber composite materials have been widely applied for various purposes, one of which is reducing noise. Many efforts have been tried to reduce noise by using sound absorbing materials such as glasswool, rockwool, and gypsum as sound absorbers, but because of the high price and bad impact on health, many studies have been conducted to find materials that are practical, cheap, and abundant availability in nature, one of which is natural fiber as an alternative to commercial sound absorbing materials. In this study, we want to know the effect of the composition of palm fronds with polyester resin can affect the sound absorption of a material and the effect of composition on sound absorption. The composition of palm frond fiber and polyester resin was varied 60%:40%, 65%:35%, 70%:30%, 75%:25%, 80%:20%, 85%:15%, 90%:10%, arranged randomly with a length of 5 mm. The specimen synthesis process starts with cutting the palm fronds, decomposing the palm frond fibers so that the fibers are separated from the flesh. Acoustic testing was conducted using a single microphone impedance tube. The test results showed that the largest absorption coefficient value is 0.984 at a frequency of 1500 Hz and is obtained in materials with a composition of 70%: 30%, and for the largest acoustic impendance value is 1.714 which is found at a frequency of 500 Hz and is obtained in the composition of 85%: 15%.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76267398","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}
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