Pub Date : 2022-04-14DOI: 10.20961/mekanika.v21i1.51479
M. Fadli
Dye-Sensitized Solar Cell (DSSC) is a type of solar cell that uses dyes to transfer sunlight to electrical energy. DSSC construction uses a layered system (sandwich) that consisting of a working electrode and an opposing electrode, both of which are placed on conducting glass and electrolytes to allow electron cycling. This research aims to determine the effect of the distance between the tip and the rotating collector in an effort to increase the efficiency of Dye-Sensitized Solar Cell (DSSC) and examine its impact on the morphology of the ZnO nanofiber. This experiment is carried out by varying the distance between the tip to the rotating collector, which are 4 cm, 6 cm, and 8 cm. The results of this research indicates that at a distance of 8 cm it produces a small, uniform and regular ZnO nanofiber structure with Voc, Jsc, FF, and DSSC efficiency values of 0.559 V, 9.809 mA / cm2, 43.3% and 2.3%. In addition, at a distance of 8 cm it also produces the highest DSSC electrical efficiency from the other distances due to the absorbance of the dye and high electron excitation.
染料敏化太阳能电池(DSSC)是一种利用染料将太阳光转化为电能的太阳能电池。DSSC结构采用分层系统(三明治)，由一个工作电极和一个反电极组成，两者都放置在导电玻璃和电解质上，以允许电子循环。本研究旨在确定尖端与旋转集电极之间的距离对染料敏化太阳能电池(DSSC)效率的影响，并研究其对ZnO纳米纤维形貌的影响。该实验通过改变喷嘴与旋转收集器之间的距离，分别为4厘米、6厘米和8厘米来进行。研究结果表明，在8 cm距离处，制备出细小、均匀、规则的ZnO纳米纤维结构，Voc、Jsc、FF和DSSC效率分别为0.559 V、9.809 mA / cm2、43.3%和2.3%。此外，在8厘米的距离上，由于染料的吸光度和高电子激发，它也从其他距离产生最高的DSSC电效率。
{"title":"Nanofiber Semiconductor Experiment with Distance Variation Electrospinning Method to Improve DSSC Performance","authors":"M. Fadli","doi":"10.20961/mekanika.v21i1.51479","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.51479","url":null,"abstract":"Dye-Sensitized Solar Cell (DSSC) is a type of solar cell that uses dyes to transfer sunlight to electrical energy. DSSC construction uses a layered system (sandwich) that consisting of a working electrode and an opposing electrode, both of which are placed on conducting glass and electrolytes to allow electron cycling. This research aims to determine the effect of the distance between the tip and the rotating collector in an effort to increase the efficiency of Dye-Sensitized Solar Cell (DSSC) and examine its impact on the morphology of the ZnO nanofiber. This experiment is carried out by varying the distance between the tip to the rotating collector, which are 4 cm, 6 cm, and 8 cm. The results of this research indicates that at a distance of 8 cm it produces a small, uniform and regular ZnO nanofiber structure with Voc, Jsc, FF, and DSSC efficiency values of 0.559 V, 9.809 mA / cm2, 43.3% and 2.3%. In addition, at a distance of 8 cm it also produces the highest DSSC electrical efficiency from the other distances due to the absorbance of the dye and high electron excitation.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127090192","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 : 2022-04-14DOI: 10.20961/mekanika.v21i1.48246
Bernardus Prasetya Utama
The brake block is an important component that serves to slow down and stop the train. The safety of this transportation is very dependent on the reliability of this component. One of the important features of the brake block material is the coefficient of friction. The coefficient of friction of the brake block material must meet and match the requirements. The coefficient of friction of a material is measured using a friction test. Previous studies have shown that the friction coefficient of a material is influenced by braking conditions, namely contact pressure and friction speed. Many friction testing methods have been developed to study the characteristics of friction materials. In contrast to previous studies, in this study, the frictional characteristics of gray cast iron brake blocks were evaluated using a reduced scale dynamometer. The friction test is carried out by pressing the brake block specimen to the surface of the rotating wheel. The specimen size of the brake block and carriage wheels is reduced to 1/4 of the original size. The friction test is carried out at a contact pressure of 0.15, 0.20, 0.25, and 0.30 (MPa) and the friction speeds of 3, 6, 9, and 12 (m/s). The results of this study indicate that the coefficient of friction of the gray cast iron brake block decreases with increasing friction speed and contact pressure.
{"title":"Frictional Characterization Of Grey Cast Iron Train Brake Block Using A Reduced Scale Dynamometer","authors":"Bernardus Prasetya Utama","doi":"10.20961/mekanika.v21i1.48246","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.48246","url":null,"abstract":"The brake block is an important component that serves to slow down and stop the train. The safety of this transportation is very dependent on the reliability of this component. One of the important features of the brake block material is the coefficient of friction. The coefficient of friction of the brake block material must meet and match the requirements. The coefficient of friction of a material is measured using a friction test. Previous studies have shown that the friction coefficient of a material is influenced by braking conditions, namely contact pressure and friction speed. Many friction testing methods have been developed to study the characteristics of friction materials. In contrast to previous studies, in this study, the frictional characteristics of gray cast iron brake blocks were evaluated using a reduced scale dynamometer. The friction test is carried out by pressing the brake block specimen to the surface of the rotating wheel. The specimen size of the brake block and carriage wheels is reduced to 1/4 of the original size. The friction test is carried out at a contact pressure of 0.15, 0.20, 0.25, and 0.30 (MPa) and the friction speeds of 3, 6, 9, and 12 (m/s). The results of this study indicate that the coefficient of friction of the gray cast iron brake block decreases with increasing friction speed and contact pressure.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"174 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120882988","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 : 2022-04-14DOI: 10.20961/mekanika.v21i1.49463
M. Wibowo
This study aims to investigate effect of fumigation and alkaline treatment on dimensional change in cantula fibers reinforced UPRs composite under immersion test in aqueous environment. Composites were fabricated using compression moulding method with cantula fiber content of 30% vt with the addition of 5% microcrystalline cellulose. Composite specimens were immersed under aquades for 2 months at room temperature. The dimensional changes of cantula fiber reinforced UPRs in different solutions were found to follow a Fickian behavior. Fumigation treated fibers and alkali treated fiber composites after immersion has lower results both in dimensional changes and its slope than untreated fiber composites.
{"title":"The Effect of Fumigation and Alkalization on Dimensional Changes of Cantula Fiber Reinforced Unsaturated Polyester Composites Under Immersion","authors":"M. Wibowo","doi":"10.20961/mekanika.v21i1.49463","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.49463","url":null,"abstract":"This study aims to investigate effect of fumigation and alkaline treatment on dimensional change in cantula fibers reinforced UPRs composite under immersion test in aqueous environment. Composites were fabricated using compression moulding method with cantula fiber content of 30% vt with the addition of 5% microcrystalline cellulose. Composite specimens were immersed under aquades for 2 months at room temperature. The dimensional changes of cantula fiber reinforced UPRs in different solutions were found to follow a Fickian behavior. Fumigation treated fibers and alkali treated fiber composites after immersion has lower results both in dimensional changes and its slope than untreated fiber composites.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129052883","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 development of the metallurgical industry in the material sector has made significant progress. FDM 3D Printer is a revolutionary technology in Additive Manufacturing (AM). Polylactic Acid (PLA) is a biodegradable and compostable polymer formed from the condensation of lactic acid. This study uses a Nozzle Temperature variation of 210⁰C, 220⁰C, and 230⁰C where shrinkage measurements will be carried out on the test object then Tensile testing, Flexural test, and macrostructural analysis will be carried out to determine the effect of Nozzle Temperature on the test. Based on the results of the study, it was found that the shrinkage produced by 3D Print specimens for Tensile Tests and Flexural Tests at Nozzle Temperature 230⁰C was very high, namely 2.83% and 4.33%, respectively. Nozzle Temperature at 230⁰C produces a fairly high σUTS and σFS of 39.60±2.60 MPa and 49.02±0.76 MPa, respectively. In macrostructural analysis, the Nozzle Temperature porosity at 230⁰C produces the smallest porosity of 0.04 mm2 or 1.46%. In this case, the increase in Nozzle Temperature resulted in a large enough shrinkage as evidenced by the small porosity formed. Therefore, variations in Nozzle Temperature on PLA 3D Printer Specimen greatly affect the mechanical properties of the material.
{"title":"Analysis Nozzle Temperature Effect In 3D Printer Fused Deposition Modelling (FDM) On Mechanical Properties and Characteristics Of Polylactic Acid (PLA)","authors":"Muhamad Alfa Rizky, Agris Setiawan, Untung Sukamto","doi":"10.20961/mekanika.v21i1.59221","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.59221","url":null,"abstract":"The development of the metallurgical industry in the material sector has made significant progress. FDM 3D Printer is a revolutionary technology in Additive Manufacturing (AM). Polylactic Acid (PLA) is a biodegradable and compostable polymer formed from the condensation of lactic acid. This study uses a Nozzle Temperature variation of 210⁰C, 220⁰C, and 230⁰C where shrinkage measurements will be carried out on the test object then Tensile testing, Flexural test, and macrostructural analysis will be carried out to determine the effect of Nozzle Temperature on the test. Based on the results of the study, it was found that the shrinkage produced by 3D Print specimens for Tensile Tests and Flexural Tests at Nozzle Temperature 230⁰C was very high, namely 2.83% and 4.33%, respectively. Nozzle Temperature at 230⁰C produces a fairly high σUTS and σFS of 39.60±2.60 MPa and 49.02±0.76 MPa, respectively. In macrostructural analysis, the Nozzle Temperature porosity at 230⁰C produces the smallest porosity of 0.04 mm2 or 1.46%. In this case, the increase in Nozzle Temperature resulted in a large enough shrinkage as evidenced by the small porosity formed. Therefore, variations in Nozzle Temperature on PLA 3D Printer Specimen greatly affect the mechanical properties of the material.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127448616","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 : 2021-09-30DOI: 10.20961/mekanika.v20i2.52100
Bayu Pranoto, H. Firmansyah, H. Wicaksono, M. Fakhruddin, Rilis Eka Perkasa
Almost of kids in the world still bring a lunch box and a bottle of water in their bag when their go to school. His mother always prepares a lunch box complete with a bottle of drinking water, hoping that his son can enjoy his favorite lunch and avoid starvation. Sometimes the mother is very worried when the lunch box has been brought by the child but the water bottle is left behind. Then the mother was willing to take her child's water bottle to her school. This is certainly not expected by either the mother or the child. As a form of concern for the author to this problem, the author proposes a lunch box design with a lunch box lid that also functions as a drinking water bottle. The idea of this design proposal is ones grab, both are food & drink in your hand. The goal is how to make a kids can grab their food and drink easily and practice. So it is proposed to modify a top cover of common foodpack to become a drink bag. The design process begins with analyzing market needs, making sketches, creating 3D design models using the Autodesk Inventor CAD application, material selection, and product evaluation.
{"title":"Lunch Box Innovation Product Design In The Millennial Era","authors":"Bayu Pranoto, H. Firmansyah, H. Wicaksono, M. Fakhruddin, Rilis Eka Perkasa","doi":"10.20961/mekanika.v20i2.52100","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.52100","url":null,"abstract":"Almost of kids in the world still bring a lunch box and a bottle of water in their bag when their go to school. His mother always prepares a lunch box complete with a bottle of drinking water, hoping that his son can enjoy his favorite lunch and avoid starvation. Sometimes the mother is very worried when the lunch box has been brought by the child but the water bottle is left behind. Then the mother was willing to take her child's water bottle to her school. This is certainly not expected by either the mother or the child. As a form of concern for the author to this problem, the author proposes a lunch box design with a lunch box lid that also functions as a drinking water bottle. The idea of this design proposal is ones grab, both are food & drink in your hand. The goal is how to make a kids can grab their food and drink easily and practice. So it is proposed to modify a top cover of common foodpack to become a drink bag. The design process begins with analyzing market needs, making sketches, creating 3D design models using the Autodesk Inventor CAD application, material selection, and product evaluation.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131041528","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 : 2021-09-30DOI: 10.20961/mekanika.v20i2.49232
H. Sutanto, S. Suyitno, W. E. Juwana, Tito Gusti Nurrohim
Biomass attracts a great deal of attention to be converted into green fuels in the form of pellets. The furnace is needed to burn pellets to generate heat up to 300 kW. In addition to meeting the heat capacity needs of the small and medium-sized industries, furnaces must also be competitive in terms of price. The purpose of this study is therefore to obtain details of the cost of manufacturing the furnace and the model of air flow that occurs in the furnace. The cost of production of the furnace includes manufacturing costs, assembly costs, machining and repair costs. The findings revealed that the key portion of the cost of the furnace was a material cost of 77%. The findings of the simulation showed that the total pressure difference of up to 850 Pa and had to be resolved by air-supplying blowers. The gas velocity ranges from 2 to 10 m/s and rises significantly near the exit to 42 m/s.
{"title":"Design, Production Cost, and Air Flow Distribution of Biomass Pellet Furnace","authors":"H. Sutanto, S. Suyitno, W. E. Juwana, Tito Gusti Nurrohim","doi":"10.20961/mekanika.v20i2.49232","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.49232","url":null,"abstract":"Biomass attracts a great deal of attention to be converted into green fuels in the form of pellets. The furnace is needed to burn pellets to generate heat up to 300 kW. In addition to meeting the heat capacity needs of the small and medium-sized industries, furnaces must also be competitive in terms of price. The purpose of this study is therefore to obtain details of the cost of manufacturing the furnace and the model of air flow that occurs in the furnace. The cost of production of the furnace includes manufacturing costs, assembly costs, machining and repair costs. The findings revealed that the key portion of the cost of the furnace was a material cost of 77%. The findings of the simulation showed that the total pressure difference of up to 850 Pa and had to be resolved by air-supplying blowers. The gas velocity ranges from 2 to 10 m/s and rises significantly near the exit to 42 m/s.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"584 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134174434","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 : 2021-09-30DOI: 10.20961/mekanika.v20i2.51986
Bayu Pranoto, C. Gunawan, H. Firmansyah, H. Wicaksono, Andhika Angger Nugraha, M. Trifiananto
In a power plant unit whose main fuel is coal, there is generally use a belt conveyor installation. This conveyor belt serves to supply coal from the crusher unit to the combustion chamber of the power generation unit. In this study, we discuss a case where the installation of a belt conveyor which was initially only one line was then made a new branch that supplies coal to other power generating units. Equitable capacity distribution and continuity of coal distribution are the main focus of this study. Therefore, a design of automatic control system of coal flow divider on belt conveyor installation was designed. The working principle of this coal flow splitting system is to control the movement of the straight blade plough that directs the flow of coal to each unit at the certain time and continuously. Straight blade plough in the form of steel metal plate with a thickness of about 10 millimeters in which one end is connected to the end of the pneumatic cylinder. Automatic control system of coal flow divider in belt conveyor installation designed using CX-Programmer and CX-Designer applications. CX-Programmer serves to create automatic control logic concepts. While the CX-designer functions to create a Human Machine Interface (HMI), making it easier for operators to control the course of the coal supply process. The results of this study are in the form of control logic lines that can be applied to Programmable Logic Control (PLC) device and Human Machine Interface (HMI) equipment.
{"title":"Design And Control System of Automatic Control System of Coal Flow on Belt Conveyor Installation","authors":"Bayu Pranoto, C. Gunawan, H. Firmansyah, H. Wicaksono, Andhika Angger Nugraha, M. Trifiananto","doi":"10.20961/mekanika.v20i2.51986","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.51986","url":null,"abstract":"In a power plant unit whose main fuel is coal, there is generally use a belt conveyor installation. This conveyor belt serves to supply coal from the crusher unit to the combustion chamber of the power generation unit. In this study, we discuss a case where the installation of a belt conveyor which was initially only one line was then made a new branch that supplies coal to other power generating units. Equitable capacity distribution and continuity of coal distribution are the main focus of this study. Therefore, a design of automatic control system of coal flow divider on belt conveyor installation was designed. The working principle of this coal flow splitting system is to control the movement of the straight blade plough that directs the flow of coal to each unit at the certain time and continuously. Straight blade plough in the form of steel metal plate with a thickness of about 10 millimeters in which one end is connected to the end of the pneumatic cylinder. Automatic control system of coal flow divider in belt conveyor installation designed using CX-Programmer and CX-Designer applications. CX-Programmer serves to create automatic control logic concepts. While the CX-designer functions to create a Human Machine Interface (HMI), making it easier for operators to control the course of the coal supply process. The results of this study are in the form of control logic lines that can be applied to Programmable Logic Control (PLC) device and Human Machine Interface (HMI) equipment.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129370183","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 : 2021-09-30DOI: 10.20961/mekanika.v20i2.50736
Mohammad Fahmi Luthfi, D. Danardono, E. Prasetya, Y. Kurniawan
This research is based on obtaining the best possible aerodynamic performance for the Quickster Narasena Bengawan UV Team UAV aircraft wing design. One of the factors that greatly affects the flying performance of a UAV is the wing. The wing on the Quickster Narasena UAV aircraft uses an MH33 airfoil, because MH33 is specifically for high-speed UAV aircraft. This research will discuss the comparison of the performance of a wing without a vortex generator with a wing with a vortex generator. Variations in the positioning of the vortex generator on the wing of the Quickster Narasena UAV will also be discussed in this study. The method used in this research is the CFD (Computational Fluid Dynamics) method. The simulation process will use the ANSYS Fluent 19.0 application with the K-Omega SST method with the Reynolds-Averaged-Navier-Stokes (RANS) equation as the basis. The purpose of this study is to obtain the results of the coefficient of drag, lift, and the contour of the turbulence that will occur. The simulation results that have been done are the geometry of the wing with the addition of a vortex generator can reduce the drag coefficient and can increase the lift coefficient.
{"title":"CFD (Computational Fluid Dynamics) Modeling on Narasena Bengawan UV Team Quickster UAV Wings with Addition of Vortex Generator to Aerodynamic Performance","authors":"Mohammad Fahmi Luthfi, D. Danardono, E. Prasetya, Y. Kurniawan","doi":"10.20961/mekanika.v20i2.50736","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.50736","url":null,"abstract":"This research is based on obtaining the best possible aerodynamic performance for the Quickster Narasena Bengawan UV Team UAV aircraft wing design. One of the factors that greatly affects the flying performance of a UAV is the wing. The wing on the Quickster Narasena UAV aircraft uses an MH33 airfoil, because MH33 is specifically for high-speed UAV aircraft. This research will discuss the comparison of the performance of a wing without a vortex generator with a wing with a vortex generator. Variations in the positioning of the vortex generator on the wing of the Quickster Narasena UAV will also be discussed in this study. The method used in this research is the CFD (Computational Fluid Dynamics) method. The simulation process will use the ANSYS Fluent 19.0 application with the K-Omega SST method with the Reynolds-Averaged-Navier-Stokes (RANS) equation as the basis. The purpose of this study is to obtain the results of the coefficient of drag, lift, and the contour of the turbulence that will occur. The simulation results that have been done are the geometry of the wing with the addition of a vortex generator can reduce the drag coefficient and can increase the lift coefficient.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115761723","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 aim of this paper is to demonstrate the evaluation process to select the Aerosol Suction Machine (ASM) design to be implemented in a dental treatment practice to prevent the spread of COVID-19. There are two designs evaluated, the movable ASM and the fixed mounting ASM. The evaluation process involved four evaluation criteria: flexibility, safety level, manufacturability, and maintenance. The evaluation is conducted based on a specific requirement of a small dental clinic located in Surakarta, Indonesia. The evaluation results show that the fixed mounting is more suitable for implementing in a small dental clinic with many natural ventilation openings.
{"title":"Design Evaluations of Aerosol Suction Machine for Dental Treatment Practices in COVID-19 Era","authors":"F. Imaduddin, Seraf Steva Oryzanandi, Budi Santoso, Raymundus Lullus Lambang Govinda Hidajat","doi":"10.20961/mekanika.v20i2.54711","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.54711","url":null,"abstract":"The aim of this paper is to demonstrate the evaluation process to select the Aerosol Suction Machine (ASM) design to be implemented in a dental treatment practice to prevent the spread of COVID-19. There are two designs evaluated, the movable ASM and the fixed mounting ASM. The evaluation process involved four evaluation criteria: flexibility, safety level, manufacturability, and maintenance. The evaluation is conducted based on a specific requirement of a small dental clinic located in Surakarta, Indonesia. The evaluation results show that the fixed mounting is more suitable for implementing in a small dental clinic with many natural ventilation openings.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124847795","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 : 2021-03-31DOI: 10.20961/MEKANIKA.V20I1.45487
B. Santoso, F. Imaduddin, H. Sukanto, J. Triyono, R. L. Lambang, P. J. Widodo, Dwi Heru Siswantoro
At this time the government prohibits the use of antibiotics in animal feed as a growth promoter (AGP) or antibiotic, so an effective and safe immunomodulator and herbal growth stimulant product are needed through Meniran extract products (Phyllantus niruri) and chemicals in the market are not yet optimal as immunomodulators and growth stimulants. CV. Maxipro Agrosatwa which is engaged in veterinary medicine, wholesale trade of agricultural products, and other live animals will produce feed using Meniran extract products. Extraction equipment that is needed is a Rotary vacuum evaporator. This equipment is needed to separate the solvent from the solute without high heating which will damage the solute content. The vacuum condition in the flask is to make the separation more efficient as well as accelerate the separation of the solvent from a solution by reducing the boiling point. The rotation of the flask is to increase evaporation. The complexity of this equipment is what makes CV. Maxipro Agrosatwa cannot handle it alone and requires technical assistance from the Department of Mechanical Engineering (JTM) FT UNS. Technical assistance provided by JTM FT UNS is in the form of procurement, delivery, installation, operation, and maintenance of the rotary vacuum evaporator.
此时，政府禁止在动物饲料中使用抗生素作为生长促进剂(AGP)或抗生素，因此需要通过Meniran提取物产品(Phyllantus niruri)找到一种有效且安全的免疫调节剂和草药生长刺激剂产品，而市场上的化学物质作为免疫调节剂和生长刺激剂还不是最理想的。简历。从事兽药、农产品批发贸易和其他活体动物的Maxipro Agrosatwa将使用Meniran提取物产品生产饲料。所需要的萃取设备是旋转真空蒸发器。该设备用于将溶剂与溶质分离，而不需要过高的加热，否则会破坏溶质含量。烧瓶中的真空条件是为了使分离更有效，并通过降低沸点加速溶剂与溶液的分离。烧瓶的旋转是为了增加蒸发。这台设备的复杂性造就了CV。Maxipro Agrosatwa不能单独处理它，需要机械工程系(JTM) FT UNS的技术援助。JTM FT UNS提供的技术支持包括旋转式真空蒸发器的采购、交付、安装、操作和维护。
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