JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering最新文献_第4页

Material investigations on poly(ethylene glycol) diacrylate-based hydrogels for additive manufacturing considering different molecular weights 考虑不同分子量的增材制造用聚乙二醇二丙烯酸酯基水凝胶的材料研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2022-07-01 DOI: 10.30464/jmee.2022.6.1.33

S. F. Klimaschewski, Janine Küpperbusch, A. Kunze, M. Vehse

引用次数: 1

Modeling, exergy analysis and optimization of cement plant industry 水泥厂工业建模、火用分析与优化

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2022-07-01 DOI: 10.30464/jmee.2022.6.1.55

H. Abutorabi, E. Kianpour

引用次数: 0

Study of flow pattern on a hydrofoil with structural and profile modification 结构和型线改变后水翼流态的研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2022-07-01 DOI: 10.30464/jmee.2022.6.1.27

Jithendra Sai Raja Chada, B. Rao

引用次数: 0

Numerical aided design of Pelton nozzle jet deflector 佩尔顿喷嘴射流偏转板的数值辅助设计

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.149

A. Lipej, B. Popovski

{"title":"Numerical aided design of Pelton nozzle jet deflector","authors":"A. Lipej, B. Popovski","doi":"10.30464/10.30464/jmee.2021.5.2.149","DOIUrl":"https://doi.org/10.30464/10.30464/jmee.2021.5.2.149","url":null,"abstract":"Hydro energy still occupies an important place among renewable energy sources. In special operating conditions, Pelton turbines are irreplaceable and can be used for extremely small hydropower plants and also large hydro power plants. Pelton turbines can operate with high head and relatively small flow rates. In many cases, the height differences of the water are very large. Sometimes it is necessary to stop the operation of the turbine very quickly and the consequences of water hammer can be very severe. The responsible part to minimize the consequences of this phenomena is jet deflector, which can be in two different technical designs. The steps for 3-D geometry definition, pre-processing and post-processing, flow modelling and FEM analysis are presented. In the paper is presented the new optimized design of push-out jet deflector shape. Optimization consider 3-D CFD analysis of free surface flow and stress analysis. The main goal of the research was to minimize the influence of all force components on the torque of deflector servomotor. The final results present the geometry of the deflector, with a significant reduction in the stresses and deformations. These have been achieved with a crucial reduction in the hydrodynamic force and torque.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73673053","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

Response surface modelling and performance evaluation of solar dryer for drying of grapes 葡萄太阳能干燥机响应面建模及性能评价

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.157

A. Yadav, Pravin A. Prabhu, J. S. Bagi

{"title":"Response surface modelling and performance evaluation of solar dryer for drying of grapes","authors":"A. Yadav, Pravin A. Prabhu, J. S. Bagi","doi":"10.30464/10.30464/jmee.2021.5.2.157","DOIUrl":"https://doi.org/10.30464/10.30464/jmee.2021.5.2.157","url":null,"abstract":"The current study focuses on the performance of Solar Greenhouse Dryer for drying of grapes for raisin making in Solar Dryer and Open sun condition in Western Maharashtra. The Maharashtra state ranks first in the production of grapes, probably Western Maharashtra produces nearly 800 thousand tons of grapes every year. The major wastage of grapes is due to low sugar content, glossy appearance, shrinkage, excess water in berry, scorching and size variation. Therefore, there is a need to preserve the grapes by drying and making raisins for a non-seasonal requirement. The experiment was conducted for drying of grapes in Solar Greenhouse Dryer and Open Sun condition from 1st of April to 4th of April for 48 hours. The initial weight of the grapes to be dried was 500 grams for both Solar Greenhouse Dryer and open sun drying conditions. The experiment was conducted at Bahe, Borgaon, Tal-Walwa, Dist- Sangli, Maharashtra, India located at 17.115o N and 74.33o E. The main aim of using DOE i.e., Response Surface Modelling is to get an optimum region for drying of grapes in Solar Greenhouse Dryer, from the Surface plot; the region of maxima and minima was obtained.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73631591","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

Cooling holes with different structures effects on coolant cross flow and heat transfer at the outlet of the combustion chamber 不同结构的冷却孔对燃烧室出口冷却液横流和换热的影响

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.141

E. Kianpour, N. A. C. Sidik

引用次数: 0

Numerical analysis of the V-die bending process of the zinc coated DC01 steel 镀锌DC01钢v型模具弯曲过程的数值分析

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.87

M. Miksza, Ł. Bohdal, K. Kośka

引用次数: 0

Forecasting process parameters on weld nugget hardness of filler added friction stir welded dissimilar aluminium alloys 5052 And 6082 joints 预测不同铝合金5052和6082搅拌摩擦焊接焊缝熔核硬度的工艺参数

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.103

A. Sasikumar, S. Gopi, Dhanesh G. Mohan

{"title":"Forecasting process parameters on weld nugget hardness of filler added friction stir welded dissimilar aluminium alloys 5052 And 6082 joints","authors":"A. Sasikumar, S. Gopi, Dhanesh G. Mohan","doi":"10.30464/10.30464/jmee.2021.5.2.103","DOIUrl":"https://doi.org/10.30464/10.30464/jmee.2021.5.2.103","url":null,"abstract":"This article deals with the optimization of friction stir welding process parameters with filler ratios on dissimilar Aluminium alloy groups. For this purpose, 6 series Aluminium alloy 6082 and 5 series Aluminium alloy 5052 were taken. Microhardness property was conducted under various rotational speeds, welding speed, plunge depth, Center distance between the holes and filler mixing ratio. The Central Composite Design (CCD), the most commonly used Response Surface Methodology (RSM), is considered to develop the prediction equation. A validation analysis is carried out, and the results were compared with the relative impact of input parameters on weld nugget microhardness. It is observed that the increase in welding speed with plunge depth and filler ratio result in the increase of weld nugget microhardness up to a maximum value. The maximum weld nugget hardness of fabricated joint was obtained with the welding process parameters combination of 1000 rpm rotational speed, 125 mm/min welding speed, 0.15 mm plunge depth, 2 mm centre distance between the holes, and filler ratio of 95% Mg and 5% Cr.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75340086","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: 4

Investigation of non-imaging Fresnel lens prototyping with different manufacturing methods for solar energy application 非成像菲涅耳透镜在太阳能应用中不同制造方法的原型研究

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.113

Ai Jiang Sexton, H. Qandil, M. Abdallah, Weihuan Zhao

{"title":"Investigation of non-imaging Fresnel lens prototyping with different manufacturing methods for solar energy application","authors":"Ai Jiang Sexton, H. Qandil, M. Abdallah, Weihuan Zhao","doi":"10.30464/10.30464/jmee.2021.5.2.113","DOIUrl":"https://doi.org/10.30464/10.30464/jmee.2021.5.2.113","url":null,"abstract":"Non-imaging Fresnel lenses have been playing an important role in improving the efficiency of the solar energy systems. Many researchers have been developing novel designs of Fresnel lenses to enhance the concentrator performance. To bring the complex design of a Fresnel lens from a conceptual theory to a real-life application while maintaining its efficiency, it is critical to find the optimum manufacturing method that achieves the best quality fabrication at low cost in the lab scale. This work will systematically investigate four advanced manufacturing methods for their lens-making capabilities, including pressure casting, hot embossing, 3D printing, and CNC machining. Six Fresnel lenses were fabricated by the four methods, which were tested in the lab by a solar simulator and a solar cell to demonstrate their performances. The CNC machining provides the best quality lab-scale Fresnel lens that enhances the solar cell efficiency by 118.3%. 3D printing and hot embossing methods are also promising for the fabrication of good performance lenses – increasing the solar cell efficiency by 40-70%. However, the 3D printed lens has the issue of material degradation on the long term. Although the pressure casting is the easiest manufacturing method, the performance of fabricated lens was the lowest.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84614149","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 a Solar Powered Reverse Osmosis System in Egypt 埃及太阳能反渗透系统的设计

JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering Pub Date : 2021-12-20 DOI: 10.30464/10.30464/jmee.2021.5.2.125

S. Ibrahim, A. G. Shabak

{"title":"Design of a Solar Powered Reverse Osmosis System in Egypt","authors":"S. Ibrahim, A. G. Shabak","doi":"10.30464/10.30464/jmee.2021.5.2.125","DOIUrl":"https://doi.org/10.30464/10.30464/jmee.2021.5.2.125","url":null,"abstract":"Scarcity of fresh water, forced many countries to get their water needs, or part of it, by means of saline water desalination. Reverse osmosis (RO) systems are useful tools in this concern. In case the grid electricity is not available or costly, photovoltaic (PV) power is necessary to derive RO systems. The present paper is concerned with providing a methodology for complete sizing and design of a photovoltaic reverse osmosis (PVRO) system in Egypt. Egypt has very favorable solar energy. A computer program was constructed to solve the mathematical equations of the model to get the numerical values. The program is capable of calculating the solar irradiation for any city in Egypt. Calculations and selection of the RO system with all connected pumps, the peak PV power needed, and the actual PV area were performed for different water demands ranging from 1-100 m3/day, and various water total dissolved solids (TDSs) of 5000, 15000, and 30000 mg/l. The cost of the complete PVRO system was also determined. The concern of the paper is related to water desalination and solar energy, which are responsible for our existence. The work also aims toward sustainable and clean environment via utilizing solar energy.","PeriodicalId":32811,"journal":{"name":"JEMMME Journal of Energy Mechanical Material and Manufacturing Engineering","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82170781","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