JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering最新文献_第8页

Method for efficient feasibility study of air cooling systems for modern PMSM electric motors in all-electric aviation 全电动航空用现代永磁同步电机空冷系统的高效可行性研究方法

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.89

J. Kapuściński, R. Domański

引用次数: 0

Local binary pattern defect recognition approach for the friction stir welded AA 1200 and AA 6061-T6 aluminum alloy aa1200和aa6061 - t6铝合金搅拌摩擦焊局部二值模式缺陷识别方法

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.27

Akshansh Mishra

引用次数: 1

Appraisal of genetic algorithm and its application in 0-1 knapsack problem 遗传算法的评价及其在0-1背包问题中的应用

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.39

M. Okwu, O. Otanocha, H. O. Omoregbee, B. Edward

{"title":"Appraisal of genetic algorithm and its application in 0-1 knapsack problem","authors":"M. Okwu, O. Otanocha, H. O. Omoregbee, B. Edward","doi":"10.30464/jmee.2020.4.1.39","DOIUrl":"https://doi.org/10.30464/jmee.2020.4.1.39","url":null,"abstract":"A lot of uncertainties and complexities exist in real life problem. Unfortunately, the world approaches such intricate realistic life problems using traditional methods which has failed to offer robust solutions. In recent times, researchers look beyond classical techniques. There is a model shift from the use of classical techniques to the use of standardized intelligent biological systems or evolutionary biology. Genetic Algorithm (GA) has been recognized as a prospective technique capable of handling uncertainties and providing optimized solutions in diverse area, especially in homes, offices, stores and industrial operations. This research is focused on the appraisal of GA and its application in real life problem. The scenario considered is the application of GA in 0-1 knapsack problem. From the solution of the GA model, it was observed that there is no combination that would give the exact weight or capacity the 35 kg bag can carry but the possible range from the solution model is 34 kg and 36 kg. Since the weight of the bag is 35 kg, the feasible or near optimal solution weight of items the bag can carry would be 34 kg at benefit of 16. Additional load beyond 34 kg could lead to warping of the bag.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86067540","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

Ventilation heat loss in a multifamily building under varying air density 不同空气密度下多户建筑的通风热损失

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.97

P. Michalak

{"title":"Ventilation heat loss in a multifamily building under varying air density","authors":"P. Michalak","doi":"10.30464/jmee.2020.4.1.97","DOIUrl":"https://doi.org/10.30464/jmee.2020.4.1.97","url":null,"abstract":": Standards related to calculation methods used in building energy performance simulation tools usually impose constant volumetric heat capacity of air. However, this simplification may result in errors if the actual conditions differ from the assumptions made. The paper presents the problem of dry air density and specific heat capacity variation and their influence on calculated energy use for space heating in a multifamily building. The monthly calculation method of PN-EN ISO 13790 was used. Simulations were performed in five cities, each in one climatic zone according to PN-EN 12831. Variation of the air density caused by air temperature and elevation resulted in differences in calculated heating demand from -4.5% to 4.5% in relation to that at constant volumetric heat capacity assumed in PN-EN ISO 13790. specific heat capacity. But varying outdoor conditions cause these parameters to change. This paper presents an assessment of the impact of the air density on the ventilation heat loss and resulting heating demand of a multifamily residential building in five cities, each in different Polish climatic zone. Calculations were performed using the monthly method of [10]. The ventilation heat loss was determined at capacity of of 1200 3 ∙ K, imposed in that and comparatively at monthly outdoor air temperatures from monthly weather data.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74220411","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

Review on properties of aluminium metal matrix composites 铝基复合材料性能研究进展

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.57

B. Subramaniam, V. Purusothaman, Sibi Mayuran Karuppusamy, Shree Hari Ganesh, Raj Kumar Markandan

{"title":"Review on properties of aluminium metal matrix composites","authors":"B. Subramaniam, V. Purusothaman, Sibi Mayuran Karuppusamy, Shree Hari Ganesh, Raj Kumar Markandan","doi":"10.30464/jmee.2020.4.1.57","DOIUrl":"https://doi.org/10.30464/jmee.2020.4.1.57","url":null,"abstract":": Nowadays, the global industries producing mechanical components are moving towards the usage of composites to reduce weight at the same time without compromising with characteristics of the material being used. This new combination of material provides specific desired properties when combined with various reinforcement materials like SiC, B 4 C, Al 2 O 3 , MgO etc., It is widely used in various industries like aerospace, automobile and marine industries. This property specific tailorable metal matrix composite with Al7075 as the base material can be fabricated using various techniques such as stir casting, high end ball milling, ultrasonic assisted casting, powder metallurgy, squeeze casting friction stir casting etc., out of which stir casting method is preferred by many researchers as stir casting method is seen to provide better distribution of reinforcement particles throughout the metal matrix. It is evident from the research of various authors that when the base material Al7075 is reinforced with the above-mentioned ceramic, it is found that there is a decrease in density and increase in hardness, compressive strength and wear resistance. Here, both physical and mechanical behaviour of aluminium reinforced composites with the effect of the particle size changes, effects after reinforcement and other processing and fabrication methods have been discussed.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77043460","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: 8

Application of Johnson’s algorithm in processing jobs through two-machine system 约翰逊算法在双机系统作业处理中的应用

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-08-09 DOI: 10.30464/jmee.2020.4.1.33

M. Okwu, I. Emovon

{"title":"Application of Johnson’s algorithm in processing jobs through two-machine system","authors":"M. Okwu, I. Emovon","doi":"10.30464/jmee.2020.4.1.33","DOIUrl":"https://doi.org/10.30464/jmee.2020.4.1.33","url":null,"abstract":"The purpose of this research is to effectively schedule jobs in a production company using heuristic Johnson’s algorithm. A popular pure water production factory, Iterlene industrial services limited (IISL) located at Effurun, Nigeria was investigated and it was noticed that different sizes of jobs (bottled water) are produced ranging from 25 cl, 50 cl, 60 cl, 75 cl, and 150 cl respectively, which are processed through the filling machine (FM1) and capping machine (CM2). In the order FM1CM2. Each job has to pass through the same sequence of operations. Jobs are assigned in such a way that a job is assigned on FM1 first and once processing is completed on FM1, it is assigned to CM2 and passing is not allowed. The idle time for the production of 500 bottles of water was estimated to be 1020 seconds (17.00 mins.). Johnson’s algorithm was applied to minimize the idle time for both FM1 and CM2 by determining the optimal sequence of the processed jobs. This was achieved within 780 seconds (13.00 mins.). Conclusively, the minimization of total elapsed time between the completion of first and last job was achieved. This would greatly improve productivity, effectiveness, and profitability at iterlene factory.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77424117","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

Comparative Study of Forward Wingtip Fence and Rearward Wingtip Fence on Wing Airfoil Eppler E562 翼型Eppler E562前翼尖和后翼尖翼尖挡板的比较研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-05-31 DOI: 10.22219/jemmme.v5i1.11968

S. Hariyadi, S. Sutardi, W. A. Widodo, B. J. Pitoyo

{"title":"Comparative Study of Forward Wingtip Fence and Rearward Wingtip Fence on Wing Airfoil Eppler E562","authors":"S. Hariyadi, S. Sutardi, W. A. Widodo, B. J. Pitoyo","doi":"10.22219/jemmme.v5i1.11968","DOIUrl":"https://doi.org/10.22219/jemmme.v5i1.11968","url":null,"abstract":"The perfect wing is a dream that many airplanes has manufactured have been striving to achieve since the beginning of the airplane design. There are some aspect that most influence in aircraft design lift, drag, thrust, and weight. The combination of these aspects leads to a decrease in fuel consumption, which reduces pollution in our atmosphere and increase in economic revenue. One way to improve aircraft performance is to modify the tip of the wing geometry, which has become a common sight on today’s airplanes. With computational programs, the effects on drag due to wingtip devices can be previewed. This research was done numerically by using turbulence model k-ω SST. Reynolds number in this research was 2,34 x 10 4 with angle of attacks are 0o, 2o, 4o, 6o, 8o, 10o, 12o, 15o, 17o and 19o. The model specimen is wing airfoil Eppler 562 with winglets. Two types of wingtips are used: forward and rearward wingtip fence. From this study, it was found that wingtip fence reduced the strength of vorticity magnitude on the x axis compared to plain wings. The leakage of fluid flow effect at the leading edge corner of the wingtip, giving pressure gradient and slightly shifting towards the trailing edge. this occurs in the plain wing and rearward wingtip fence but does not occur in the forward wingtip fence..","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"74 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83365520","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 Combustion Characteristics of Refine Corn Oil with Areca Catechu Extract as Additive 槟榔儿茶提取物精制玉米油燃烧特性的实验研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-05-31 DOI: 10.22219/jemmme.v5i1.11990

W. Wardoyo, A. Widodo, W. Wijayanti, I. Wardana

{"title":"Experimental Investigation on Combustion Characteristics of Refine Corn Oil with Areca Catechu Extract as Additive","authors":"W. Wardoyo, A. Widodo, W. Wijayanti, I. Wardana","doi":"10.22219/jemmme.v5i1.11990","DOIUrl":"https://doi.org/10.22219/jemmme.v5i1.11990","url":null,"abstract":"The need for vegetable oils as alternative energy reserves increases with the depletion of fossil energy sources. Vegetable oil is the strongest candidate to replace the fossil energy. However, the use of vegetable oil directly as fuel is limited by high viscosity. Viscosity like this results in non-ideal atomization, challenging to evaporate, and cannot burn completely. Among the methods that have been studied by previous researchers and which have proven to be effective, cheaper, and can reduce the viscosity of vegetable oils better is the mixing method. In this study, corn oil was mixed with areca extract as an additive. Areca extract contains polyphenols which are polar types of epicatechin. Epicatechin has three aromatic rings and several hydroxyl groups. Delocalisation of electrons in aromatic rings can produce London forces on vegetable oil molecules, thereby increasing the reactivity of burning vegetable oil droplets. The burning characteristics of corn vegetable oil affected by areca extract have been studied experimentally at room temperature and atmospheric pressure. The results showed that the rate and temperature of combustion increased, as well as the presence of micro explosions. The London force that appears causes the bonds in the triglyceride molecules to weaken so that the combustion becomes reactive, the rate of heat transfer in the droplets gets better, facilitates the appearance of micro explosions and increases the combustion temperature. Vegetable oil from corn has been studied experimentally at atmospheric pressure and room temperature. The results show an increase in the rate of combustion, an increase in combustion temperature, and the presence of micro explosions. London force that appears causes the bonds in the triglyceride molecules to weaken so that combustion becomes more reactive, the rate of heat transfer in the droplet gets better, facilitates the appearance of micro explosions and raises the combustion temperature.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73937696","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

Experimental Study on Mold-Lay Filament instead of Wax in Investment Casting Process 熔模铸造中铺模长丝代替蜡的试验研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-05-31 DOI: 10.22219/jemmme.v5i1.10602

I. Kusyairi, H. Himawan, Moch. Agus Choiron, Y. Irawan, Rachmat Safari, D. R. Djuanda

{"title":"Experimental Study on Mold-Lay Filament instead of Wax in Investment Casting Process","authors":"I. Kusyairi, H. Himawan, Moch. Agus Choiron, Y. Irawan, Rachmat Safari, D. R. Djuanda","doi":"10.22219/jemmme.v5i1.10602","DOIUrl":"https://doi.org/10.22219/jemmme.v5i1.10602","url":null,"abstract":"Metal casting with investment casting method is metal casting which has the ability to produce accurate parts and has a controlled fineness. Current technological developments are very influential in the development of investment casting. One of them has been found mold-lay filament as a substitute for wax, which is now wax is one of the main components in investment casting process. Mold-lay filament is printed using a 3D Printer machine. In this study, the wax in the investment casting process was replaced by a mold-lay filament with the specifications 0.75kg / 0.55 lb of 1.75mm MOLDLAY filament, prints at temperatures of 170-180 ° C. The result show that mold-lay flutes are also able to come out well from slurry molds, but require more time than wax, this is because one of the plastic mold-lay compositions, which takes a long time for the moldlay fillment to come out of the mold. Further research suggestions are needed further testing in terms of roughness of the product with moldlay filament and compared with wax. This will also see if there are any remaining moldlay filaments from the mold.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86503377","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

The Potent of Carrier Oil on Pretreatment of Crude Jatropha Curcas Oil 载体油预处理麻疯树粗油的效果

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2020-05-31 DOI: 10.22219/jemmme.v5i1.12336

Dini Kurniawati, I. Aisyah

引用次数: 1