Journal of Engineering and Technological Sciences最新文献_第10页

Performance Evaluation of a Continuous Downdraft Gasification Reactor Driven by Electric Motors with Manual Mode of Operation 电机驱动的手动模式下连续下吸式气化反应器的性能评价

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.5

R. Setiawan, H. F. Hidayat, H. Dafiqurrohman, A. Surjosatyo, Radon Dhelika

{"title":"Performance Evaluation of a Continuous Downdraft Gasification Reactor Driven by Electric Motors with Manual Mode of Operation","authors":"R. Setiawan, H. F. Hidayat, H. Dafiqurrohman, A. Surjosatyo, Radon Dhelika","doi":"10.5614/j.eng.technol.sci.2022.54.4.5","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.5","url":null,"abstract":"Gasification is considered a promising option for harnessing energy potential from agricultural waste, such as rice husks. This paper presents a 10-kW rice husk fixed bed gasifier system. This system is an improved version of a prototype previously developed by our research group. Some of the optimized features added to the gasifier include the use of a circular air intake, an improved gas cleaning system, and electric motors that are regulated by a programmable logic controller. Keeping the gasifier system’s operation stable is critical for producing high-quality synthetic gas (syngas). Therefore, performance evaluation of the presented gasifier system was conducted, and the resulting syngas outputs were analyzed. The evaluation also included an investigation into the performance of the motors, particularly those used for feeding and char removal, which are critical components of the system. The results showed that the improved gasifier system was stable with a proper feedstock. A discussion of the parameters affecting the composition of the synthetic gas is also presented.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48730137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab 平板桁架冲剪加固有效性试验研究

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.2

S. Salehuddin, S. Zaini, M. A. Megat Johari, N. L. Rahim, M. A. Rahim

{"title":"Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab","authors":"S. Salehuddin, S. Zaini, M. A. Megat Johari, N. L. Rahim, M. A. Rahim","doi":"10.5614/j.eng.technol.sci.2022.54.4.2","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.2","url":null,"abstract":"The use of reinforced concrete flat slabs in building construction increases the floor-to-floor clearance, expedites site operations, and offers aesthetically rewarding features. However, punching shear failure in a flat slab is brittle in nature and can be potentially catastrophic. Many studies have been conducted to improve the punching shear capacity of flat slabs but some of the proposed punching shear reinforcements were complicated and costly. This research aimed to evaluate the effectiveness of a simple and cost-effective; truss-shaped punching shear reinforcement embedded in a 1200 mm × 1200 mm × 175 mm thick flat slab specimen. Three types of truss-shaped punching shear reinforcements were prepared. All specimens were supported at the edges and subjected to gravity load tests. The results showed that the introduction of truss-shaped punching shear reinforcement increased the punching shear capacity in the range of 7.71% to 21.47%. The maximum deflection of these specimens exhibited an insignificant increase compared to the control specimen, suggesting that punching failure governed the ultimate behavior. The additional strength offered by truss-shaped punching shear reinforcement makes flat slabs as a construction material more appealing because they allow them to withstand higher design loads.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42939510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Split-Hopkinson Pressure Bar Specimen Fixture to Accommodate Punch and Double-Notch Shear Testing 适应冲孔和双缺口剪切试验的分离式霍普金森压杆试样夹具的设计

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Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI: 10.5614/j.eng.technol.sci.2022.54.4.8

Arya Dipajaya, Kemal I. Ahmad, M. A. Kariem

引用次数: 2

Wastewater Processing Technology Opportunities for Palm Oil Mill Effluent as a Raw Material for Renewable Bioenergy 棕榈油厂废水作为可再生生物能源原料的废水处理技术机遇

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Journal of Engineering and Technological Sciences Pub Date : 2022-06-06 DOI: 10.5614/j.eng.technol.sci.2022.54.3.13

A. Gumilar, M. Syafila, M. Handajani, Ilham Anggamulia, S. Hidayat

{"title":"Wastewater Processing Technology Opportunities for Palm Oil Mill Effluent as a Raw Material for Renewable Bioenergy","authors":"A. Gumilar, M. Syafila, M. Handajani, Ilham Anggamulia, S. Hidayat","doi":"10.5614/j.eng.technol.sci.2022.54.3.13","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.3.13","url":null,"abstract":"The effect of pH on the formation of hydrogen and ethanol using POME as the substrate has not been widely studied. Indonesia, which is the largest producer of palm oil, has a high potential for the utilization of this liquid waste as a substrate for the formation of hydrogen and ethanol. This study determined the optimum hydrogen and ethanol production conditions by controlling pH. POME was used as substrate in an anaerobic reactor and operated in feed batch mode for 72 hours. Mixed culture anaerobic bacteria as biomass were used in the reactor. The pH of the reactor was adjusted to 4.5, 5.5, 6.5, and 7.5 using NaOH 0.1 N and HCl 0.1 N. The reactor’s performance was investigated by measuring hydrogen production, ethanol production, and volatile fatty acid product. It was found that with an initial pH of 5.5, hydrogen production was higher than for the other pH conditions, at about 14.7% v/v. In contrast, the most increased ethanol production occurred in the reactor with an initial pH of 6.5 with a concentration of 347.7 mg/L. Based on the results of this study, the right pH setting can optimize hydrogen and ethanol production.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44728084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of Reactive Yellow 4R Azo Dye from Synthetic Aqueous Solution by Alkali Hydrothermally Activated Fly Ash 碱水热活化粉煤灰去除合成水溶液中的活性黄色4R偶氮染料

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Journal of Engineering and Technological Sciences Pub Date : 2022-06-01 DOI: 10.5614/j.eng.technol.sci.2022.54.3.12

F. L. Nugroho, Deni Rusmaya, Angela Deviliana

{"title":"Removal of Reactive Yellow 4R Azo Dye from Synthetic Aqueous Solution by Alkali Hydrothermally Activated Fly Ash","authors":"F. L. Nugroho, Deni Rusmaya, Angela Deviliana","doi":"10.5614/j.eng.technol.sci.2022.54.3.12","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.3.12","url":null,"abstract":"Dye-containing wastewater affects the aesthetic quality, transparency and gas solubility of natural water bodies, hence colored wastewater must be treated before being discharged. Physical removal of dyes from wastewater can be achieved using activated carbon. However, this technique is expensive, so there is a need to find less expensive alternatives. A waste product generated from coal-fired plants known as fly ash is a sorbent that can be used to remove pollutants from solution. This study investigated the effectiveness of using alkali (NaOH) hydrothermally activated fly ash to remove Reactive Yellow 4R azo dye from synthetic aqueous solution. Na2O in alkali hydrothermally activated fly ash increases thirteen-fold. SEM observations revealed that the raw fly ash consisted of smooth round shaped particles, whereas the activated fly ash was composed of granular crystalline particles. Batch adsorption experiments of the dye at 25 °C showed that increasing the activated fly ash quantity (0.5 to 3.5 g) increased the removal efficiency from 30% to 39.3%. The Freundlich isotherm adsorption model best described the adsorption of Reactive Yellow 4R dye by alkali hydrothermally activated fly ash with KF = 1.49 x 10-21 mg/g. The dye adsorption kinetics by activated fly ash followed the Lagergren pseudo second order model, with calculated qe = 2.65 mg/g; k2 = 0.06 g/mg; and calculated h = 0.42 mg/g min‑1. Dye removal occurred primarily through surface adsorption and very little through intra-particle diffusion.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44542684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Production of Biogasoline via Pyrolysis of Oleic Acid Basic Soaps 油酸碱性皂热解生产生物汽油

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Journal of Engineering and Technological Sciences Pub Date : 2022-05-31 DOI: 10.5614/j.eng.technol.sci.2022.54.3.11

E. Puspawiningtiyas, T. Prakoso, M. Pratiwi, S. Subagjo, T. Soerawidjaja

引用次数: 1

Optimal Design of V-Shaped Fin Heat Sink for Active Antenna Unit of 5G Base Station 5G基站有源天线单元V形翅片散热器的优化设计

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Journal of Engineering and Technological Sciences Pub Date : 2022-05-31 DOI: 10.5614/j.eng.technol.sci.2022.54.3.9

C. Nguyen, Minh-Dinh Bui, Ngoc-Kien Nguyen, Van-Tinh Nguyen

引用次数: 0

Adaptive Fuzzy Proportional Integral Sliding Mode Control for Two-Tank Interacting System 双油箱交互系统的自适应模糊比例积分滑模控制

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Journal of Engineering and Technological Sciences Pub Date : 2022-05-31 DOI: 10.5614/j.eng.technol.sci.2022.54.3.10

Thanh Tung Pham, C. Nguyen

引用次数: 2

The Effect of Linear Low-Density Polyethylene and Palm Kernel Shell Ash Mixture on the Physical, Mechanical and Degradation Properties of Paving Blocks 线性低密度聚乙烯与棕榈仁壳灰混合料对路面砌块物理、力学及降解性能的影响

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Journal of Engineering and Technological Sciences Pub Date : 2022-05-30 DOI: 10.5614/j.eng.technol.sci.2022.54.3.7

C. Nurhayati, Nesi Susilawati, T. Susanto, Winda Marthalia, Aditya Krisna Nugroho, Ahmad Paisan Pane

{"title":"The Effect of Linear Low-Density Polyethylene and Palm Kernel Shell Ash Mixture on the Physical, Mechanical and Degradation Properties of Paving Blocks","authors":"C. Nurhayati, Nesi Susilawati, T. Susanto, Winda Marthalia, Aditya Krisna Nugroho, Ahmad Paisan Pane","doi":"10.5614/j.eng.technol.sci.2022.54.3.7","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.3.7","url":null,"abstract":"The aim of this research was to evaluate the physical-mechanical parameters of paving stones obtained on the basis of the mixture of linear low-density polyethylene (LLDPE) and palm kernel shell ash (PKSA) waste. The ratio of LLDPE to PKSA waste (% weight) was varied in five treatments: A0 (100:0), A1 (97.5:2.5), A2 (95:5), A3 (92.5:7.5), A4 (90:10) and A5 (87.5:12.5). The physical appearance, thickness, compressive strength, water absorption, and morphological characteristics of the paving blocks were observed. The blocks were observed at ambient temperature, exposed to sunlight, and placed on the ground surface on day 0 and day 365. The results showed that addition of PKSA waste decreased the compressive strength but increased the water absorption capacity without a significant effect on the thickness of the paving blocks. Observation after 365 days showed insignificant decreases of compressive strength and thickness, whereas the water absorption capacity increased slightly. Small cracks and more voids in the surface, and more brittleness were observed. To summarize, composites of LLDPE and PSKA as filler have physical-mechanical properties that can be used for road pavement blocks.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47140568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Experimental and Theoretical Analysis of Throughput of MIMO PLC Network MIMO PLC网络吞吐量的实验与理论分析

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Journal of Engineering and Technological Sciences Pub Date : 2022-05-30 DOI: 10.5614/j.eng.technol.sci.2022.54.3.8

A. Hmamou, M. El Ghzaoui, J. Foshi, J. Mestoui

{"title":"Experimental and Theoretical Analysis of Throughput of MIMO PLC Network","authors":"A. Hmamou, M. El Ghzaoui, J. Foshi, J. Mestoui","doi":"10.5614/j.eng.technol.sci.2022.54.3.8","DOIUrl":"https://doi.org/10.5614/j.eng.technol.sci.2022.54.3.8","url":null,"abstract":"In this study, we mainly focused on a theoretical analysis of HomePlug 1.0 and an experimental analysis of modem data rates through a section of a PLC network with several configurations. We introduce the utilization of the MIMO technique to increase the throughput over a PLC channel. Besides, we propose a MIMO PLC channel model to evaluate the channel transfer function of MIMO PLC. We used an equivalent per-unit-length model of the indoor power line network to characterize the three-conductor cable. Based on this mathematical model, we analyzed the throughput of the PLC network with different household appliances. The equivalent circuit of each appliance is also given. The simulation results showed that the throughput is influenced by household appliances connected to the sockets of a MIMO PLC network. Moreover, we also compared the throughput between single and multi-antenna systems. Based on the simulation results, we found that the data rate increased with frequency. In addition, the performance of the MIMO PLC system was almost 90% higher than that of a SISO PLC system in terms of channel capacity.","PeriodicalId":15689,"journal":{"name":"Journal of Engineering and Technological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49286001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0