检索结果-内蒙古大学图书馆

4th International Symposium on Advances and Innovation in mechanical engineering, ISAIME 2023

作者： Prahmana, Rico Aditia Darmanto, Prihadi Setyo Reksowardojo, Iman Kartolaksono Prakoso, Tirto Juangsa, Firman Bagja Doctoral Program of Mechanical Engineering Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Institut Teknologi Sumatera South Lampung35365 Indonesia Thermal Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung Indonesia Department of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Universitas Pertamina Jakarta12220 Indonesia

In the last decade, the Indonesian government has implemented a program to use biodiesel as a substitute for fossil diesel to reduce dependence on fossil fuels. On the other hand, the development of biodiesel as an alternative fuel to replace fossil diesel has several challenges, one of which is the production of biodiesel, which is more complicated and requires a long process. However, the direct use of crude palm oil (CPO) in diesel engines is not recommended because it has many drawbacks. Research recently shows that fuel additives in diesel engines have promising prospects. Therefore, to solve the problem, this study used pure palm oil (PPaO) as the primary fuel, with the addition of silicon oxide (SiO2) as a fuel additive in diesel engines. The results showed that using SiO2 additive in PPaO can increase thermal efficiency by 18.8% at 60% load compared to diesel fuel (DF). Nevertheless, using this fuel increased specific fuel consumption (SFC) by 3.9% on average and increased the opacity by 153% compared to diesel fuel. These results indicate that SiO2 has the potential to be developed as an effective additive to PPaO fuel that can improve the efficiency and performance of diesel engines. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Biodiesel

来源：评论

学校读者我要写书评

暂无评论

Pyrolysis study of coconut leaf's biomass using thermogravimetric analysis 1

Pyrolysis study of coconut leaf's biomass using thermogravim...

引用

1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Rajendra, I.M. Winaya, I.N.S. Ghurri, A. Wirawan, I.K.G. Study Program of Doctoral Engineering Sciences Faculty of Engineering University of Udayana Indonesia Study Program of Mechanical Engineering Faculty of Engineering University of Udayana Indonesia Mechanical Engineering Department Bali State Polytechnic Indonesia

Coconut leaf is one of the most potential biomass to be converted into bio-oil through pyrolysis process and the availability in Indonesia is abundance. The mechanism of decomposition of coconut leaf into bio-oil productions requires further research because of the complexity of pyrolysis and differences in biomass composition. Therefore, the design, optimization and modeling of pyrolysis processes is strongly influenced by biomass characteristics. The purpose of this study was to find the characteristic differences in pyrolysis behavior of the three main parts of coconut leaf based on its constituent parts;leaflets, midrib and whole leaf. Moisture is removed by drying the sample in an electric oven at 110°C for 24 hours. Characteristics were tested using Cellulose Analysis, Ultimate Analysis, and Heat Value, whereas pyrolysis behavior used Thermogravimetric Analyzer (TGA). The results show that leaflets, midrib and whole leaf exhibit different pyrolysis behavior. In terms of considering flow process of separation, the whole leaf becomes an option as a fuel for further pyrolysis processes. The maximum temperature that as a reference in the pyrolysis process of coconut leaves is 500°C with temperature rate of 20°C/min and the process lasts as long for 130 minutes. © Published under licence by IOP Publishing Ltd.

关键词： Pyrolysis

来源：评论

学校读者我要写书评

暂无评论

Optimization of Extrusion Parameters for Composite Pla/Mg/Ha Filaments Using the Taguchi Method for Bone Scaffold

SSRN

引用

SSRN 2025年

作者： Prakoso, Akbar Teguh Basri, Hasan Adanta, Dendy Gunawan Akbar, Imam Syahrom, Ardiyansyah Arifin, Amir Department of Mechanical Engineering Faculty of Engineering Universitas Sriwijaya Indralaya South Sumatra 30662 Indonesia Doctoral Program Study of Engineering Science Faculty of Engineering Universitas Sriwijaya Palembang South Sumatra30139 Indonesia Applied Mechanics and Design Faculty of Mechanical Engineering Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia

This paper attempts to optimise the single screw extrusion (SSE) process parameters for extruding polylactic acid (PLA)/magnesium (Mg)/hydroxyapatite (HA) composite filament, aiming for a final filament diameter of 1.75 mm to enhance process efficiency and output quality. In this study, the Taguchi method was employed to systematically evaluate how screw speed, nozzle diameter, material composition, and temperature affect filament diameter. The analysis demonstrated that screw speed, nozzle diameter, material composition, and temperature significantly affect the filament diameter. Under optimal conditions (94% wt PLA, 4% wt Mg, and 2% wt HA, 1.95 mm nozzle diameter, 6 rpm screw speed, and 175°C), the resulting filament diameter closely approached 1.75 mm. These findings enhance the fabrication efficiency and quality of composite filaments, with promising applications in advanced bone scaffolds. © 2025, The Authors. All rights reserved.

关键词： Scaffolds (biology)

来源：评论

学校读者我要写书评

暂无评论

Impact of different kinds of biomass mixtures on combustion performance, interaction and synergistic effects in cofiring of coal and biomass in steam power plants

引用

Clean Energy 2023年第5期7卷 1136-1147页

作者： Mochamad Soleh Azaria Haykal Ahmad Firman Bagja Juangsa Prihadi Setyo Darmanto Ari Darmawan Pasek Mechanical Engineering Doctoral Program Study Faculty of Mechanical and Aerospace EngineeringInstitut Teknologi BandungJl.Ganesha 10Bandung40132 Indonesia Mechanical Engineering Master Program Study Faculty of Mechanical and Aerospace EngineeringInstitut Teknologi BandungJl.Ganesha 10Bandung40132 Indonesia Energy Conversion Research Group Faculty of Mechanical and Aerospace EngineeringInstitut Teknologi BandungJl.Ganesha 10Bandung40132 Indonesia Research Center for New and Renewable Energy Institut Teknologi BandungJl.Ganesha 10Bandung40132 Indonesia Research and Development Center PT.PLN Indonesia Power

The cofiring of biomass and coal may be one of the most effective methods to improve energy utilization efficiency and reduce greenhouse gas *** study aims to investigate combustion performance,interaction and synergistic effects in the cofiring of coal and three types of *** fuel consisting of coal and three types of biomass such as sawdust,rice husk and solid recovery fuel was selected as the research *** and proximate analysis and differential thermogravimetric analysis with heating rates of between 10°C and 40°C/minute are used to analyse combustion *** of combustion in a 600-MWe steam power plant with a Carolina-type boiler is also carried out with the help of computational fluid dynamic(CFD)analysis to see the effect of the interaction and synergy of the mixed fuel on the performance of the steam *** effect on the com-bustion process in the combustion chamber of a steam power plant is also *** on the analysis of several test results of parameters such as ignition temperature,burnout temperature,calorific value of the fuel mixtures as well as CFD simulation,the results of the study show a strong indication of a positive synergy in mixing some of these biomasses as compared with a fuel mix-ture consisting only of coal and one type of *** no power derating of the boiler occurs until the biomass content in the fuel mixture is~30%on a mass *** reduction in greenhouse gas emissions also appears significant from the results of the CFD simulation of this study,which is characterized by a decrease in the fraction of CO_(2) in flue gas from 21.5%for coal alone as fuel to 15.9%in the case of cofiring excluding the CO_(2) attributed to the biomass.

关键词： biomass sawdust cofiring coal-fired power plant combustion decarbonization computational fluids dynamic

来源：评论

学校读者我要写书评

暂无评论

A Simple Low-Cost Apparatus for of Single Fiber Tensile Strength Measurement 2nd

A Simple Low-Cost Apparatus for of Single Fiber Tensile Stre...

引用

2nd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2020

作者： Sabri, S. Fuadi, Z. Kurniawan, R. Hajar, I. Rizal, Samsul Homma, H. Doctoral School of Engineering Postgraduate Study Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Mechanical and Industrial Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Undergraduate Study Program Department of Mechanical and Industrial Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia

ISBN: (纸本)9789811607356

Concerns about environment impacts of synthetics fiber composites usages have led to various researches in Natural Fiber Composites (NFCs). Since various natural fibers are available worldwide, one of the issues in its application is the evaluation of mechanical properties of the fiber. In this study, we have designed a simple low-cost tensile test apparatus for evaluation of ultimate tensile strength of single natural fiber. The simple apparatus is built using a low-cost linear stage driven by a stepper motor. A cantilever spring is employed to measure the tensile force during the tensile test. The apparatus shows a good performance when used to evaluate the maximum tensile strength of single Abacafiber. However, the apparatus still has the limitation in that it has no feature to measure the fiber’s elongation during the test. Nevertheless, the apparatus is considered useful for preliminary evaluation of the ultimate tensile strength of various single natural fiber. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Single fiber Tensile test Test apparatus Ultimate tensile strength

来源：评论

学校读者我要写书评

暂无评论

The effect of fiber volume fraction on tensile and impact properties of eleusine indica grass reinforced polypropylene bio composite 1

The effect of fiber volume fraction on tensile and impact pr...

引用

1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Lokantara, I.P. Suardana, N.P.G. Surata, I.W. Winaya, I.N.S. Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department Udayana University Street of Bukit Jimbaran Bali Badung Indonesia

The purpose of this research was to investigate the tensile strength and impact strength of eleusine indica grass fiber-reinforced polypropylene recycle composite. In this study, the fiber was treated with alkali at 5% NaOH for 2 hours. The eleusine indica grass fiber cut with a length of 3 cm and the matrix used recycle polypropylene. In this research, the volume fraction of eleusine indica grass fiber varied by 20%, 25%, and 30% respectively. The composite molded with a hot press at temperature 200°C with a holding time for 2 hours. Tensile test used ASTM D3039 and impact test used ASTM D256. The highest tensile and impact strength results on fiber volume fraction 30%. © Published under licence by IOP Publishing Ltd.

关键词： Polypropylenes

来源：评论

学校读者我要写书评

暂无评论

Activated carbon characteristics of tabah bamboo that physically activated under different activation time 1

Activated carbon characteristics of tabah bamboo that physic...

引用

1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Negara, D.N.K.P. Nindhia, T.G.T. Surata, I.W. Sucipta, M. Hidajat, F. Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department Udayana University Street of Bukit Jimbaran Bali Badung Indonesia PPPTMGB Lemigas Jl. Ciledug Raya Kav. 109 Jakarta Selatan12230 Indonesia

Activated carbon is a versatile porous material that widely applied to purify, deodorize, decolorize, remove or reduce some gases harmful constituents and storage of gas. For different application different characteristics of activated carbon is required. This paper concerns to find out the characteristics of activated carbons derived from tabah bamboo (Gigantochloc nigrociliata) that physically activated with different activation holding time. Prepared tabah bamboo was carbonized by heating up to the temperature of 800 °C for two hours. The char produced was powdered and then activated physically by heating up to 800 °C, soaked at that temperature during each 1, 1.5 and 2 hours under 100 mL/min N2 flow. Activated carbons manufactured were characterized by proximate and ultimate analyses and SEM observation. The results show that the highest fix carbon (82.52%) and lowest ash (5.91 %) was obtained at 1 hour soaking time with moisture and volatile contents were 3.56% and 8.00 % respectively;the highest carbon (C) content of 84.16 % was yielded at soaked time of 1.5 hours;SEM observation shows that there were significant differences of morphology structure between raw material and activated carbons for all of the soaking time variations. The pores structures have been formed in the activated carbons produced. © Published under licence by IOP Publishing Ltd.

关键词： Activated carbon

来源：评论

学校读者我要写书评

暂无评论

Transforming the academic workplace: An evaluation of the ADVANCE program in colleges of engineering (2001-2008)

Transforming the academic workplace: An evaluation of the AD...

引用

2010 ASEE Annual Conference and Exposition

作者： Zajicek, Anna M. Rencis, Joseph Morimoto, Shauna A. Hunt, Valerie H. Department of Sociology University of Arkansas United States Department of Mechanical Engineering University of Arkansas Fayetteville United States Department of Sociology and Criminal Justice University of Arkansas United States Doctoral Study in the Interdisciplinary Public Policy Program University of Arkansas Fayetteville United States

For over two decades, the US government has supported gender equity programs in Science, Technology, engineering, and Mathematics (STEM) disciplines. In 2001, the National Science Foundation (NSF) initiated the ADVANCE Institutional Transformation (IT) program with the primary goal to increase the representation of women in STEM. Since 2001, 37 institutions of higher education have received the NSF ADVANCE IT awards, and 19 have completed their five-year projects. Using the American Society of engineering Education (ASEE) data, we assess the changes in the representation of full-time tenure-track women faculty in engineering colleges. While earlier cross-institutional studies of the ADVANCE IT program focus only on ADVANCE institutions, we also compare engineering colleges at ADVANCE institutions to their university peers. Our analysis suggests that while the average gains in the percentage of full-time tenure-track engineering women faculty for Cohort 2 were almost twice the national average, the gains were uneven not only between the two cohorts, but also among the engineering colleges in each cohort. Similarly, the ADVANCE institutions showed an uneven performance when compared with their peers. We therefore raise important questions regarding how success is defined and conclude by highlighting the most interesting instances of successful and not so successful efforts along with the importance of conducting multi-level comparative analyses of ADVANCE and non-ADVANCE institutions. © American Society for engineering Education, 2010.

关键词： Professional aspects

来源：评论

学校读者我要写书评

暂无评论

Textural characteristics of activated carbons derived from tabah bamboo manufactured by using H 3 PO 4 chemical activation

引用

Materials Today: Proceedings 2020年 22卷 148-155页

作者： Dewa Ngakan Ketut Putra Negara Tjokorda Gde Tirta Nindhia I Wayan Surata Fadjar Hidajat Made Sucipta Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Bali-80234 Indonesia Mechanical Engineering of Udayana University Jimbaran Badung Bali-80362 Indonesia PPPTMGB “Lemigas” Jl. Ciledug Raya Kav. 109 Jakarta Selatan 12230 Indonesia

Activated carbon utilization in a different application requires a specific characteristic. Textural characteristics such as pore volume (V P ), surface area (S A ), pore diameter (D P ) and pore size distribution (PSDs) have an important effect on the quality and utility of activated carbon. Such characteristics are attributed to the activated carbon adsorption capacity. This research is concerned to investigate the textural properties of activated carbons derived from tabah bamboo ( Gigantochloa nigrociliata ) which are chemically activated using H 3 PO 4 activating agent. Carbonization was carried out up to 800 O C for 1.5 hours. Activations were set up to 820 O C for each 50, 100 and 150 minutes. The activated carbons produced are expressed as AC-50min, AC-100min, and AC-150min each for activation during 50, 100, and 150 minutes. The results of the research show that the higher activation time produced activated carbons with higher pore volume and wider average pore diameter but no pattern was observed on the surface area. The highest surface area of 398.400 m 2 /g and the highest pore volume of 0.680 cc/g were achieved by AC-100min and AC-150min activated carbons, respectively. The highest N 2 adsorption capacity of 48.743 cc/g was achieved on the activated carbon of AC-150min. AC-50min, AC-100min, and AC-150min have average pore diameters, respectively, around of 1.258 nm, 1.750 nm, and 3.950 nm. AC-50min and AC-100min produced pores with a monomodal pore size distribution and a bimodal pore size distribution was found on AC-150min

关键词： Activated carbon bamboo chemical activation adsorption textural characteristic

来源：评论

学校读者我要写书评

暂无评论

Pyrolysis study of coconut leaf's biomass using thermogravimetric analysis

引用

IOP Conference Series: Materials Science and engineering 2019年第1期539卷

作者： I M Rajendra I N S Winaya A Ghurri I K G Wirawan Study Program of Doctoral Engineering Sciences Faculty of Engineering University of Udayana Mechanical Engineering Department Bali State Polytechnic Study Program of Mechanical Engineering Faculty of Engineering University of Udayana

Coconut leaf is one of the most potential biomass to be converted into bio-oil through pyrolysis process and the availability in Indonesia is abundance. The mechanism of decomposition of coconut leaf into bio-oil productions requires further research because of the complexity of pyrolysis and differences in biomass composition. Therefore, the design, optimization and modeling of pyrolysis processes is strongly influenced by biomass characteristics. The purpose of this study was to find the characteristic differences in pyrolysis behavior of the three main parts of coconut leaf based on its constituent parts; leaflets, midrib and whole leaf. Moisture is removed by drying the sample in an electric oven at 110°C for 24 hours. Characteristics were tested using Cellulose Analysis, Ultimate Analysis, and Heat Value, whereas pyrolysis behavior used Thermogravimetric Analyzer (TGA). The results show that leaflets, midrib and whole leaf exhibit different pyrolysis behavior. In terms of considering flow process of separation, the whole leaf becomes an option as a fuel for further pyrolysis processes. The maximum temperature that as a reference in the pyrolysis process of coconut leaves is 500°C with temperature rate of 20°C/min and the process lasts as long for 130 minutes.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：