Pub Date : 2024-02-01DOI: 10.24853/jurtek.16.1.153-160
Aljufri Aljufri, Reza Putra, Abdul Rahman, Rikki Mardian
The depletion of fossil fuels is a hot topic of discussion these days. This is due to the increasing use of fossil fuels in human life. In terms of the increase in fuel and gas prices, we realise that the energy consumption that is increasing from year to year is not balanced with the availability of energy sources, which affects households that use fuel in the cooking process. So a design was carried out to make an ergonomic solid fuel stove with the aim of not using fuel anymore in the cooking process, in this design, the stove is designed to be more flexible and get a portable biomass rocket stove design by considering social aspects, performance, local resources, economy, environmentally friendly. Biomass fuels are solids, liquids or gases produced from organic matter.. Biomass fuels used in solid fuel stoves such as firewood, charcoal, briquettes and pellets. Each biomass fuel has different properties and characteristics. The designed portable rocket stove consists of several main parts namely combustion chamber, chimney, air duct, pan spot and cassing, using stainless steel material. The test results include combustion chamber and water temperature during the process, thermal efficiency, combustion rate and specific fuel consumption under cold start and hot start conditions. After hot start, it is found that the use of a chimney on a portable stove designed using coconut shell fuel is more effective than without a chimney. Shorter boiling time of 1 minute, greater combustion rate of 0.13 grams/minute, higher thermal efficiency of 2% and lower specific fuel consumption of 9.11 grams/litre of water when the stove uses a chimney.
{"title":"Design of A Portable Solid-Fuel Rocket Stove","authors":"Aljufri Aljufri, Reza Putra, Abdul Rahman, Rikki Mardian","doi":"10.24853/jurtek.16.1.153-160","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.153-160","url":null,"abstract":"The depletion of fossil fuels is a hot topic of discussion these days. This is due to the increasing use of fossil fuels in human life. In terms of the increase in fuel and gas prices, we realise that the energy consumption that is increasing from year to year is not balanced with the availability of energy sources, which affects households that use fuel in the cooking process. So a design was carried out to make an ergonomic solid fuel stove with the aim of not using fuel anymore in the cooking process, in this design, the stove is designed to be more flexible and get a portable biomass rocket stove design by considering social aspects, performance, local resources, economy, environmentally friendly. Biomass fuels are solids, liquids or gases produced from organic matter.. Biomass fuels used in solid fuel stoves such as firewood, charcoal, briquettes and pellets. Each biomass fuel has different properties and characteristics. The designed portable rocket stove consists of several main parts namely combustion chamber, chimney, air duct, pan spot and cassing, using stainless steel material. The test results include combustion chamber and water temperature during the process, thermal efficiency, combustion rate and specific fuel consumption under cold start and hot start conditions. After hot start, it is found that the use of a chimney on a portable stove designed using coconut shell fuel is more effective than without a chimney. Shorter boiling time of 1 minute, greater combustion rate of 0.13 grams/minute, higher thermal efficiency of 2% and lower specific fuel consumption of 9.11 grams/litre of water when the stove uses a chimney.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"48 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464298","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 : 2024-02-01DOI: 10.24853/jurtek.16.1.161-168
D. Rimantho, Nur Yulianti Hidayah, V. A. Pratomo, Anwar Ilmar Ramadhan
Three problems are being faced simultaneously by Earth today: water (wastewater), energy, and food. However, considering the finite amount of land and the depletion of fossil fuels, this expansion is incompatible with the replenishment of natural resources in terms of both quantity and quality. Furthermore, another sustainable energy source that has gained international attention is biodiesel. However, research on the relative flash durations of Maggot BSFL oil has not been conducted. Consequently, this article will compare the flame times of many other types of oil with Maggot BSFL oil. This study uses a variety of oils as experimental subjects, including BSF maggot oil, used cooking oil, Pertamina Dex, and a combination of Pertamina Dex and BSF maggot oil. Analysis of the variations in flame time for each type of oil is done using statistical analysis. According to this analysis, the mixture of Maggot BSF oil and Pertamina Dex had the maximum flame, lasting between 16.31 and 16.44 minutes. Additionally, this study offers data on the notable variations in flame length for each type of oil, including used cooking oil, Pertamina Dex, Maggot BSF oil, and a combination of both. When creating biodiesel from Maggot BSF oil, the experiment's findings can serve as a starting point. in order for biodiesel made from Maggot BSF oil to provide Indonesia with a fresh option for the development of sustainable energy.
{"title":"Analysis of Variances in Flame Length of Time For Maggot BSF Oil with Several Types of Oil","authors":"D. Rimantho, Nur Yulianti Hidayah, V. A. Pratomo, Anwar Ilmar Ramadhan","doi":"10.24853/jurtek.16.1.161-168","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.161-168","url":null,"abstract":"Three problems are being faced simultaneously by Earth today: water (wastewater), energy, and food. However, considering the finite amount of land and the depletion of fossil fuels, this expansion is incompatible with the replenishment of natural resources in terms of both quantity and quality. Furthermore, another sustainable energy source that has gained international attention is biodiesel. However, research on the relative flash durations of Maggot BSFL oil has not been conducted. Consequently, this article will compare the flame times of many other types of oil with Maggot BSFL oil. This study uses a variety of oils as experimental subjects, including BSF maggot oil, used cooking oil, Pertamina Dex, and a combination of Pertamina Dex and BSF maggot oil. Analysis of the variations in flame time for each type of oil is done using statistical analysis. According to this analysis, the mixture of Maggot BSF oil and Pertamina Dex had the maximum flame, lasting between 16.31 and 16.44 minutes. Additionally, this study offers data on the notable variations in flame length for each type of oil, including used cooking oil, Pertamina Dex, Maggot BSF oil, and a combination of both. When creating biodiesel from Maggot BSF oil, the experiment's findings can serve as a starting point. in order for biodiesel made from Maggot BSF oil to provide Indonesia with a fresh option for the development of sustainable energy.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"402 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468239","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.33-40
Akmal Firdausyah, A. Munazid, Prastyono Eko Pambudi, Bagiyo Suwasono
Ship's Ferries are a sea crossing that continues to operate around the time. The consequence related to shipping activities is an increase in ship exhaust emissions. One alternative for ship propulsion that is environmentally friendly is the Flettner rotor. The working principle of the tool follows the theory of the Magnus effect, where the force arises due to the difference in pressure between the two sides of the Flettner rotor. This study implicates the Flettner rotor on the Kalianget-Kangean ferry route with variations in wind speeds of 10, 15 and 20 knots and variations in dimensions of 3x1, 5x1 and 7x1 meters with a rotational speed of 500 rpm. Optimal results through computational fluid dynamics (CFD) simulations show a coefficient of lift (CL) of 3.647 and a lift force (Fl) of 2,980,631.2 kilonewton with dimensions of 5x1 meters and a wind speed of 15 knots. While the implicit percentage of Flettner rotors in KMP. DBS I of 18.11%, KMP. DBS III of 11.27%, and KMP. NS 92 of 5.45%.
{"title":"Flettner Rotor Implication on Ship Ferry The Kalianget-Kagean Route Using Computational Fluid Dynamics","authors":"Akmal Firdausyah, A. Munazid, Prastyono Eko Pambudi, Bagiyo Suwasono","doi":"10.24853/jurtek.16.1.33-40","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.33-40","url":null,"abstract":"Ship's Ferries are a sea crossing that continues to operate around the time. The consequence related to shipping activities is an increase in ship exhaust emissions. One alternative for ship propulsion that is environmentally friendly is the Flettner rotor. The working principle of the tool follows the theory of the Magnus effect, where the force arises due to the difference in pressure between the two sides of the Flettner rotor. This study implicates the Flettner rotor on the Kalianget-Kangean ferry route with variations in wind speeds of 10, 15 and 20 knots and variations in dimensions of 3x1, 5x1 and 7x1 meters with a rotational speed of 500 rpm. Optimal results through computational fluid dynamics (CFD) simulations show a coefficient of lift (CL) of 3.647 and a lift force (Fl) of 2,980,631.2 kilonewton with dimensions of 5x1 meters and a wind speed of 15 knots. While the implicit percentage of Flettner rotors in KMP. DBS I of 18.11%, KMP. DBS III of 11.27%, and KMP. NS 92 of 5.45%.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"361 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140480898","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.127-136
Zumrotin Nur Afifah, Dewi Kurniasih, F. Rachman
The development of Indonesia's industry is currently changing from commodity-based to manufacture-based. The manufacturing industry cannot be separated from the role of the packaging industry. So it is necessary to have Human Resources with good performance to be able to help achieve the goals and vision and mission of the company. Employee performance comes from two factors, namely individual factors and organizational environmental factors. The purpose of this study was to determine the effect of work stress and psychosocial factors consisting of job demands and work organization on employee performance in packaging companies through leadership quality. The method used is PLS-SEM with a sample of 75 people. The results showed that work stress had a significant effect on employee performance (p-value = 0.000), job demands and work organization had no significant effect on employee performance (p-value = 0.501 on job demands and p-value = 0.658 on work organization) , leadership quality has no significant effect on employee performance (p-value = 0.685), work stress has no significant effect on employee performance through leadership quality (p-value = 0.740), and job demands and work organization have no significant effect on employee performance through quality leadership (p-value=0.877 on job demands and p-value=0.725 on work organization). While the r-square value which shows the influence of work stress variables, job demands, work organization, and leadership quality on employee performance is 63.7%.
目前，印尼工业的发展正从以商品为基础转变为以制造业为基础。制造业离不开包装业的作用。因此，必须要有绩效良好的人力资源，才能帮助实现公司的目标、愿景和使命。员工绩效来自两个因素，即个人因素和组织环境因素。本研究的目的是通过领导质量来确定工作压力以及由工作要求和工作组织构成的社会心理因素对包装公司员工绩效的影响。采用的方法是 PLS-SEM，样本为 75 人。结果表明，工作压力对员工绩效有显著影响（p 值 = 0.000），工作要求和工作组织对员工绩效没有显著影响（工作要求的 p 值 = 0.501，工作组织的 p 值 = 0.658），领导质量对员工绩效没有显著影响（p 值 = 0.685），工作压力通过领导质量对员工绩效没有显著影响（p 值=0.740），工作要求和工作组织通过领导质量对员工绩效没有显著影响（工作要求的 p 值=0.877，工作组织的 p 值=0.725）。而显示工作压力变量、工作要求、工作组织和领导质量对员工绩效影响的 r 平方值为 63.7%。
{"title":"The Influence of Job Stress and Psychosocial Factors on Employee Performance through Leadership Quality","authors":"Zumrotin Nur Afifah, Dewi Kurniasih, F. Rachman","doi":"10.24853/jurtek.16.1.127-136","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.127-136","url":null,"abstract":"The development of Indonesia's industry is currently changing from commodity-based to manufacture-based. The manufacturing industry cannot be separated from the role of the packaging industry. So it is necessary to have Human Resources with good performance to be able to help achieve the goals and vision and mission of the company. Employee performance comes from two factors, namely individual factors and organizational environmental factors. The purpose of this study was to determine the effect of work stress and psychosocial factors consisting of job demands and work organization on employee performance in packaging companies through leadership quality. The method used is PLS-SEM with a sample of 75 people. The results showed that work stress had a significant effect on employee performance (p-value = 0.000), job demands and work organization had no significant effect on employee performance (p-value = 0.501 on job demands and p-value = 0.658 on work organization) , leadership quality has no significant effect on employee performance (p-value = 0.685), work stress has no significant effect on employee performance through leadership quality (p-value = 0.740), and job demands and work organization have no significant effect on employee performance through quality leadership (p-value=0.877 on job demands and p-value=0.725 on work organization). While the r-square value which shows the influence of work stress variables, job demands, work organization, and leadership quality on employee performance is 63.7%.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"70 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140483178","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.75-82
Satworo Adiwidodo, Masrur Maulana Ahmad
A water turbine is an energy conversion machine that converts water head into shaft movement. In screw-type turbines, performance is influenced by several parameters including outer diameter, inner diameter, rotor length, head angle, number of blades, and pitch distance. This research uses a screw turbine type with a tip fin. The research aims to determine the performance of screw turbines with tip fins on mechanical power and efficiency. The research independent variables consist of pitch ratio and flow rate. The pitch ratio variations used are 1.2; 1.4 and 1.6 while the variations in flow rate used are 3 l/s, 3.5 l/s, and 4 l/s. The method used in this research is experimental. This study's data analysis employed the two-way Anova method with an alpha (α) of 5%. Anova's results show that the P-value of the interaction of the two independent variables, pitch ratio and water discharge, is <0.05, meaning that the independent variables have a significant influence on the performance of the screw turbine. The highest turbine performance results were at a pitch ratio of 1.4 at a water flow rate of 4 l/s resulting in an efficiency value of 34.91% and a mechanical power value of 6.82 watts at a rotational speed of 125 RPM. The lowest turbine performance results at a pitch ratio of 1.2 with a flow rate of 3 l/s resulting in an efficiency of 22.64% and a mechanical power of 3.32 watts at a rotational speed of 56 RPM.
{"title":"The Effect Of Pitch Ratio On Screw Turbine Performance With Tip Fin","authors":"Satworo Adiwidodo, Masrur Maulana Ahmad","doi":"10.24853/jurtek.16.1.75-82","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.75-82","url":null,"abstract":"A water turbine is an energy conversion machine that converts water head into shaft movement. In screw-type turbines, performance is influenced by several parameters including outer diameter, inner diameter, rotor length, head angle, number of blades, and pitch distance. This research uses a screw turbine type with a tip fin. The research aims to determine the performance of screw turbines with tip fins on mechanical power and efficiency. The research independent variables consist of pitch ratio and flow rate. The pitch ratio variations used are 1.2; 1.4 and 1.6 while the variations in flow rate used are 3 l/s, 3.5 l/s, and 4 l/s. The method used in this research is experimental. This study's data analysis employed the two-way Anova method with an alpha (α) of 5%. Anova's results show that the P-value of the interaction of the two independent variables, pitch ratio and water discharge, is <0.05, meaning that the independent variables have a significant influence on the performance of the screw turbine. The highest turbine performance results were at a pitch ratio of 1.4 at a water flow rate of 4 l/s resulting in an efficiency value of 34.91% and a mechanical power value of 6.82 watts at a rotational speed of 125 RPM. The lowest turbine performance results at a pitch ratio of 1.2 with a flow rate of 3 l/s resulting in an efficiency of 22.64% and a mechanical power of 3.32 watts at a rotational speed of 56 RPM.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"97 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140480759","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.65-74
Vera Devani, Chlarisya Rahmadani
PT. IA is a company engaged in the manufacture of animal feed, producing chicken eggs and broiler chicken farm. The problems at PT. IA is amount of distribution costs incurred by the company, so the method needed to optimize disttribution costs. The purpose of this research is to determine the optimal distribution costs of chicken eggs, compare the distribution cost of chicken eggs before and after optimization, and compare the ASM method with Stepping Stone method. The method use to solve the probelum is using ASM method. ASM method is one of a method that can use to find the optimal solution without have to find the starting solution to minimize costs. Allocation product with ASM Method is done from the smallest index and the largest amount of supply, until all demand is met and supply out of stock. Based on the research, it shown the revision of ASM method is not necessarly able to provide the optimal solution directly to unbalanced transportation problems or the accurance of additional activities. The minimum total cost with ASM method is Rp. 586.800.000, while after test the optimization using Stepping Stone method the result is Rp. 585.300.000. The difference cost before and after optimization using the revised ASM method is Rp. 93.300.000 or decrease of 13.7%.
{"title":"Optimization of Chicken Egg Distribution Cost Using Revised ASM Method (Case Study: Breeding Industry)","authors":"Vera Devani, Chlarisya Rahmadani","doi":"10.24853/jurtek.16.1.65-74","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.65-74","url":null,"abstract":"PT. IA is a company engaged in the manufacture of animal feed, producing chicken eggs and broiler chicken farm. The problems at PT. IA is amount of distribution costs incurred by the company, so the method needed to optimize disttribution costs. The purpose of this research is to determine the optimal distribution costs of chicken eggs, compare the distribution cost of chicken eggs before and after optimization, and compare the ASM method with Stepping Stone method. The method use to solve the probelum is using ASM method. ASM method is one of a method that can use to find the optimal solution without have to find the starting solution to minimize costs. Allocation product with ASM Method is done from the smallest index and the largest amount of supply, until all demand is met and supply out of stock. Based on the research, it shown the revision of ASM method is not necessarly able to provide the optimal solution directly to unbalanced transportation problems or the accurance of additional activities. The minimum total cost with ASM method is Rp. 586.800.000, while after test the optimization using Stepping Stone method the result is Rp. 585.300.000. The difference cost before and after optimization using the revised ASM method is Rp. 93.300.000 or decrease of 13.7%.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"150 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484782","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.17-26
Kharis Abdullah, S. T. Sarena
Ship launching is one of the stages of ship production before the ship is handed over to the owner, which marks the beginning of the ship's life. With the development of technology at this time, various launching methods have been developed, one of which is the launching method using an air bag system. Launching using air bags has many advantages compared to conventional launching methods that have been used so far. Pre-launch calculations are performed to avoid risks during the launch. Launching using air bags begins with calculating the weight plan of the ship launch and the preparation of the air bag layout. Using CB/T 3837:1998 Technological Requirements for Ship Upgrading or Launching Relying on Air Bags, Shipbuilding Industry Standard, and ISO 14409:2011 ships and marine technology-ship launching air bags, the number of air bag requirements and layout can be determined to support the ship launching process. The passenger ship, with an length overall of 62.80 metres, is planned to have a launch weight of 1058.881 tons. By using the QG6 high-bearing capacity air bag model with 6 layers of cord fabric with a diametre of one metre and a contact length between the air bag and the ship's body of ten metres, a total of 11 air bags are required in a linear arrangement to support the launch of a passenger ship. The distance between air bags is 2.07 metres to 5.736 metres, the longer the distance between air bags, the greater the load supported by each air bag.
{"title":"Design of a Passenger Ship Launch Using an Air Bag System","authors":"Kharis Abdullah, S. T. Sarena","doi":"10.24853/jurtek.16.1.17-26","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.17-26","url":null,"abstract":"Ship launching is one of the stages of ship production before the ship is handed over to the owner, which marks the beginning of the ship's life. With the development of technology at this time, various launching methods have been developed, one of which is the launching method using an air bag system. Launching using air bags has many advantages compared to conventional launching methods that have been used so far. Pre-launch calculations are performed to avoid risks during the launch. Launching using air bags begins with calculating the weight plan of the ship launch and the preparation of the air bag layout. Using CB/T 3837:1998 Technological Requirements for Ship Upgrading or Launching Relying on Air Bags, Shipbuilding Industry Standard, and ISO 14409:2011 ships and marine technology-ship launching air bags, the number of air bag requirements and layout can be determined to support the ship launching process. The passenger ship, with an length overall of 62.80 metres, is planned to have a launch weight of 1058.881 tons. By using the QG6 high-bearing capacity air bag model with 6 layers of cord fabric with a diametre of one metre and a contact length between the air bag and the ship's body of ten metres, a total of 11 air bags are required in a linear arrangement to support the launch of a passenger ship. The distance between air bags is 2.07 metres to 5.736 metres, the longer the distance between air bags, the greater the load supported by each air bag.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"35 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482358","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 study is located on PT Indocement Tunggal Prakarsa Tbk., which is still actively engaged in mining operations. The study aimed to determine the slope Safety Factor (SF) and offer suggestions for safe slope geometry for mining operations. Primary data collection through observation of lithology conditions, sample testing in the laboratory, scanline mapping, slope geometry measurements, and secondary data obtained from company inventories and related sources. The kinematic approach is used to assess the risk of landslides. This slope stability study uses boundary equilibrium based on the Morgenstern Price and Mohr-Coulomb failure criteria. Limestone is the majority of the rocks in the location. The kinematic analysis demonstrated that direct toppling and wedge toppling are the landslide potential at the research location. Using the non-circular boundary equilibrium approach, slope stability analysis was carried out on four Regions with dry and saturated groundwater conditions i.e, Regions A', B140, C120, and C135. The four Regions have stable slopes and are in good condition (SF values over 1.25). For the excavation to be carried out optimally, the recommendations for optimization of the overall slope geometry are given, namely, the height of the bench is 10 m, and the width of the ladder is 4 m. The slope angle is 80o, with SF value of 3.035 in dry conditions and an SF value of 2.021 in saturated conditions.
{"title":"Slope Stability Evaluation and Geometrical Recommendation Using The Morgenstern Price Method","authors":"Heri Matius Sesa, Najib Najib, Hasnan Luthfi Dalimunthe, Zerlinda Handietri","doi":"10.24853/jurtek.16.1.53-64","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.53-64","url":null,"abstract":"The study is located on PT Indocement Tunggal Prakarsa Tbk., which is still actively engaged in mining operations. The study aimed to determine the slope Safety Factor (SF) and offer suggestions for safe slope geometry for mining operations. Primary data collection through observation of lithology conditions, sample testing in the laboratory, scanline mapping, slope geometry measurements, and secondary data obtained from company inventories and related sources. The kinematic approach is used to assess the risk of landslides. This slope stability study uses boundary equilibrium based on the Morgenstern Price and Mohr-Coulomb failure criteria. Limestone is the majority of the rocks in the location. The kinematic analysis demonstrated that direct toppling and wedge toppling are the landslide potential at the research location. Using the non-circular boundary equilibrium approach, slope stability analysis was carried out on four Regions with dry and saturated groundwater conditions i.e, Regions A', B140, C120, and C135. The four Regions have stable slopes and are in good condition (SF values over 1.25). For the excavation to be carried out optimally, the recommendations for optimization of the overall slope geometry are given, namely, the height of the bench is 10 m, and the width of the ladder is 4 m. The slope angle is 80o, with SF value of 3.035 in dry conditions and an SF value of 2.021 in saturated conditions. ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"713 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482857","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.41-52
D. Haryanto, A. Budiman, Muhammad Ganjar Putra, Putut Hery Setiawan, M. Juarsa
The Passive System Simulation Facility (FASSIP) loop is an experimental test facility for a passive cooling system to recover the residual heat from decay produced by the reactor core during accident conditions. The Heating Tank Section (HTS) is one of the components of the FASSIP 03 NT facility. This component is equipped with a heat exchanger, 3 types of heat exchangers can be applied to HTS. Namely heat exchangers of the Straight Pipe Heat Exchanger (SPHE) type, the Straight Pipe Fins Heat Exchanger (SPFHE) type, and the Helical Pipe Heat Exchanger (HPHE) type. A modification was made to increase the efficiency of HTS, namely replacing the electric heater on the HTS from a ceramic band heater type to an immersion heater type. With this modification, it is necessary to know the performance of the heat exchanger on HTS and its speed in reaching operational temperature. The HPHE-type heat exchanger is more efficient than the SPHE-type and SPFHE-type heat exchangers. The HPHE-type heat exchanger has a much larger length of 5.5 m, so the thermal resistance (Rth) is very small, namely 0.003926 ℃/W. To reach the working fluid temperature in the range of 50 – 90 ℃, the HPHE-type heat exchanger requires 35 – 86 minutes.
{"title":"Investigation of Heat Exchanger Performance in The Heating Tank Section of Loop FASSIP 03 NT","authors":"D. Haryanto, A. Budiman, Muhammad Ganjar Putra, Putut Hery Setiawan, M. Juarsa","doi":"10.24853/jurtek.16.1.41-52","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.41-52","url":null,"abstract":"The Passive System Simulation Facility (FASSIP) loop is an experimental test facility for a passive cooling system to recover the residual heat from decay produced by the reactor core during accident conditions. The Heating Tank Section (HTS) is one of the components of the FASSIP 03 NT facility. This component is equipped with a heat exchanger, 3 types of heat exchangers can be applied to HTS. Namely heat exchangers of the Straight Pipe Heat Exchanger (SPHE) type, the Straight Pipe Fins Heat Exchanger (SPFHE) type, and the Helical Pipe Heat Exchanger (HPHE) type. A modification was made to increase the efficiency of HTS, namely replacing the electric heater on the HTS from a ceramic band heater type to an immersion heater type. With this modification, it is necessary to know the performance of the heat exchanger on HTS and its speed in reaching operational temperature. The HPHE-type heat exchanger is more efficient than the SPHE-type and SPFHE-type heat exchangers. The HPHE-type heat exchanger has a much larger length of 5.5 m, so the thermal resistance (Rth) is very small, namely 0.003926 ℃/W. To reach the working fluid temperature in the range of 50 – 90 ℃, the HPHE-type heat exchanger requires 35 – 86 minutes.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"126 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140485190","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.1-10
Aryo Sasmita, Edward Edward, Rudea Faddhisrah Syahbana
Carbon Monoxide (CO) emitted by motorized vehicles can have a negative impact on human health. One way to absorb CO gas is with adsorption technology using activated carbon. Activated carbon has the potential to be used as an adsorbent. This research aims to study the efficiency of CO gas absorption in motorbike emissions using activated carbon from rubber fruit shells. Activated carbon was prepared by carbonization process at 500oC for 1 hour using 10% H3PO4 activator and sieving with a sieve size of 200 mesh. The operating conditions of the adsorption process that were varied were the length of the adsorbent, namely 3; 4; and 5 cm. The activated carbon product is then tested using proximate analysis. The results of proximate analysis show that activated carbon meets SNI 06-3730-1995 with a water content value of 7.6%; ash content 8.7%; volatile matter 8.2%; and fixed carbon 75.5%. The research results showed that the highest removal of CO gas emissions on motorbikes occurred at a contact time of 1 minute of 80.809% with a media thickness of 5 cm. The best adsorption capacity value occurred at a contact time of 1 minute, with an activated carbon media length of 3 cm, namely 158.635 mg/g.
{"title":"Adsorbation of Carbon Monoxide Gas With Activated Carbon From Rubber Fruit Shells","authors":"Aryo Sasmita, Edward Edward, Rudea Faddhisrah Syahbana","doi":"10.24853/jurtek.16.1.1-10","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.1-10","url":null,"abstract":"Carbon Monoxide (CO) emitted by motorized vehicles can have a negative impact on human health. One way to absorb CO gas is with adsorption technology using activated carbon. Activated carbon has the potential to be used as an adsorbent. This research aims to study the efficiency of CO gas absorption in motorbike emissions using activated carbon from rubber fruit shells. Activated carbon was prepared by carbonization process at 500oC for 1 hour using 10% H3PO4 activator and sieving with a sieve size of 200 mesh. The operating conditions of the adsorption process that were varied were the length of the adsorbent, namely 3; 4; and 5 cm. The activated carbon product is then tested using proximate analysis. The results of proximate analysis show that activated carbon meets SNI 06-3730-1995 with a water content value of 7.6%; ash content 8.7%; volatile matter 8.2%; and fixed carbon 75.5%. The research results showed that the highest removal of CO gas emissions on motorbikes occurred at a contact time of 1 minute of 80.809% with a media thickness of 5 cm. The best adsorption capacity value occurred at a contact time of 1 minute, with an activated carbon media length of 3 cm, namely 158.635 mg/g.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"33 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482621","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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