Pub Date : 2019-08-29DOI: 10.26480/jmerd.05.2019.119.123
M. Poojari, Ashwin Kamarthi, Kshitij K Shetty, Adithya P Sanil, Karthik V Palan
Wheel assemblies used in automobiles consist of Hub, Knuckle, Bearings and Wheel usually integrated as unibody or part components. The materials used for these components are mainly cast iron, mild steel, aluminum alloys, ductile iron, and steel spokes. Usage of an alternate material like the Nylon-6,6 has been proposed in this work which is intended to reduce the overall weight of the wheel assembly. Lightweight hub and wheel assembly would reduce the inertia, the work done to move or stop the vehicle. In this work, Nylon-6,6 has been proposed to be used for the wheel hub by conducting engineering analysis with suitable design yielding reliable FOS with reduction in weight thereby, making Nylon-6,6 a usable material for the wheel hubs. The characteristics of Nylon-6,6 like good mechanical strength, stiffness and mechanical damping ability with good fatigue resistance and ease of manufacturing gives the material an upper hand over other plastic polymers in reducing the unsprung mass without compromising on strength and safety.
{"title":"DESIGN AND ANALYSIS OF THE WHEEL HUB FOR AN ALL- TERRAIN VEHICLE WITH THE PLASTIC POLYMER: NYLON- 6,6","authors":"M. Poojari, Ashwin Kamarthi, Kshitij K Shetty, Adithya P Sanil, Karthik V Palan","doi":"10.26480/jmerd.05.2019.119.123","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.119.123","url":null,"abstract":"Wheel assemblies used in automobiles consist of Hub, Knuckle, Bearings and Wheel usually integrated as unibody or part components. The materials used for these components are mainly cast iron, mild steel, aluminum alloys, ductile iron, and steel spokes. Usage of an alternate material like the Nylon-6,6 has been proposed in this work which is intended to reduce the overall weight of the wheel assembly. Lightweight hub and wheel assembly would reduce the inertia, the work done to move or stop the vehicle. In this work, Nylon-6,6 has been proposed to be used for the wheel hub by conducting engineering analysis with suitable design yielding reliable FOS with reduction in weight thereby, making Nylon-6,6 a usable material for the wheel hubs. The characteristics of Nylon-6,6 like good mechanical strength, stiffness and mechanical damping ability with good fatigue resistance and ease of manufacturing gives the material an upper hand over other plastic polymers in reducing the unsprung mass without compromising on strength and safety.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82417878","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.127.131
Bhaskara P. Achar, G. D'Mello, P SrinivasaPai, K. Gururaj
Among Nickel based super alloys, Inconel 718 is a most widely used alloy, due to its superior properties like high temperature resistance, corrosion resistance, creep resistance, good mechanical properties etc. But, machining this alloy is a challenge even today because of its high temperature strength, hot hardness, wear resistance and work hardening and is considered as a ‘difficult-to-machine’ material. To overcome these problems, lubrication and cooling is an effective method and there have been several research studies aimed to reduce the machinability problems considering different cooling methods. But these methods have their own disadvantages and to overcome these and to support ‘sustainability’, air cooling is being adopted in a big way by machining industries. Thus, this research work focusses to experimentally investigate the effect of air cooling during turning of Inconel 718 using uncoated carbide inserts. The machinability is being evaluated in terms of cutting tool temperature, tool wear, surface roughness and cutting tool vibrations. Experiments are conducted at different speeds and feeds and results have been compared with dry machining. Further Random forest regression, a statistical technique is used to model surface roughness using data collected from air cooled experiments. It is found to be effective in modeling surface roughness, with a prediction accuracy of more than 89 % for Ra.
{"title":"USE OF VORTEX TUBE AIR COOLING DURING MACHINING OF INCONEL 718: EXPERIMENTAL INVESTIGATION AND MODELING STUDIES","authors":"Bhaskara P. Achar, G. D'Mello, P SrinivasaPai, K. Gururaj","doi":"10.26480/jmerd.05.2019.127.131","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.127.131","url":null,"abstract":"Among Nickel based super alloys, Inconel 718 is a most widely used alloy, due to its superior properties like high temperature resistance, corrosion resistance, creep resistance, good mechanical properties etc. But, machining this alloy is a challenge even today because of its high temperature strength, hot hardness, wear resistance and work hardening and is considered as a ‘difficult-to-machine’ material. To overcome these problems, lubrication and cooling is an effective method and there have been several research studies aimed to reduce the machinability problems considering different cooling methods. But these methods have their own disadvantages and to overcome these and to support ‘sustainability’, air cooling is being adopted in a big way by machining industries. Thus, this research work focusses to experimentally investigate the effect of air cooling during turning of Inconel 718 using uncoated carbide inserts. The machinability is being evaluated in terms of cutting tool temperature, tool wear, surface roughness and cutting tool vibrations. Experiments are conducted at different speeds and feeds and results have been compared with dry machining. Further Random forest regression, a statistical technique is used to model surface roughness using data collected from air cooled experiments. It is found to be effective in modeling surface roughness, with a prediction accuracy of more than 89 % for Ra.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80868574","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.51.56
V. V. Le, Thanh H. Truong, Thi Minh Hao Dong
It should be determined that the marine engine operation at a low load operation (especially 40% or less) is not conducive to the operation of the engine and related equipment. However, manufacturers accept and allow the engine to operate continuously at such a low load condition. The mode operates at a low load of marine engines that drive the propeller is used quite recently in various reasons. The S46 ME-B8.5 engine concept consists of a hydraulicmechanical system for activation of the fuel injection. The fuel pressure booster consists of a simple plunger powered by a hydraulic piston activated by oil pressure. An electronically controlled proportional valve controls the oil pressure. The exhaust valve is activated by a light camshaft, driven by a chain drive placed in the aft end of the engine. However, at low load operation, the MAN B&W S46ME-B8.5 engines have generated several incidents that greatly affect the operation of the ship including a malfunction on the exhaust valve and troubles of jamming plungers of the high-pressure pump during engine acceleration and start-up. Therefore, it is essential to learn and identify structural and operational characteristics of the S46 ME-B8.5 engines. Moreover, it is necessary to analyze the effects on the process of low-load operation as sailing. The paper focuses on studying the operating characteristics of engines in low load mode, assessing the effects of this mode on engines and related machines. Besides, this study also developed the operation process for S46ME-B8.5 engines. In this paper, the authors propose solutions to effectively operate the S46 ME-B8.5 engines in low load mode when traveling on the sea.
{"title":"EFFICIENT OPERATION SOLUTIONS FOR MARINE ENGINE SERIES OF MAN B&W S46ME-B8.5 IN LOW STEAMING","authors":"V. V. Le, Thanh H. Truong, Thi Minh Hao Dong","doi":"10.26480/jmerd.05.2019.51.56","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.51.56","url":null,"abstract":"It should be determined that the marine engine operation at a low load operation (especially 40% or less) is not conducive to the operation of the engine and related equipment. However, manufacturers accept and allow the engine to operate continuously at such a low load condition. The mode operates at a low load of marine engines that drive the propeller is used quite recently in various reasons. The S46 ME-B8.5 engine concept consists of a hydraulicmechanical system for activation of the fuel injection. The fuel pressure booster consists of a simple plunger powered by a hydraulic piston activated by oil pressure. An electronically controlled proportional valve controls the oil pressure. The exhaust valve is activated by a light camshaft, driven by a chain drive placed in the aft end of the engine. However, at low load operation, the MAN B&W S46ME-B8.5 engines have generated several incidents that greatly affect the operation of the ship including a malfunction on the exhaust valve and troubles of jamming plungers of the high-pressure pump during engine acceleration and start-up. Therefore, it is essential to learn and identify structural and operational characteristics of the S46 ME-B8.5 engines. Moreover, it is necessary to analyze the effects on the process of low-load operation as sailing. The paper focuses on studying the operating characteristics of engines in low load mode, assessing the effects of this mode on engines and related machines. Besides, this study also developed the operation process for S46ME-B8.5 engines. In this paper, the authors propose solutions to effectively operate the S46 ME-B8.5 engines in low load mode when traveling on the sea.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80961038","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.74.77
Le Thi Chieu, N. D. Nam
Carbonitriding is a case-hardening process sin which carbon and nitrogen are increased in the surface layer of a low-carbon parts at a temperature sufficient to render austenitenic steel. The followed by quenching and tempering to form martensite microstructure. In the comparison with carburizing, Carbonitriding is carried out at a lower temperature, for a shorter time and resultion finer microstructure. However, in our Industry, this method is not developed. The reason that the carbonitriding atmosphere is constituent unreasonably. On this paper, carbonitriding is prepared by mixture of Industrial gas, CO2; N2, NH3, with different ratio. The reasonable ratios is selected. Microstructure, microhardness are tested. This atmosphere is applied for carbonitriding for anchorage wedges, shows good result.
{"title":"THE ATMOSPHERE CONSTITUENTS FOR GAS CARBONITRIDING ANCHORAGE WEDGE","authors":"Le Thi Chieu, N. D. Nam","doi":"10.26480/jmerd.05.2019.74.77","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.74.77","url":null,"abstract":"Carbonitriding is a case-hardening process sin which carbon and nitrogen are increased in the surface layer of a low-carbon parts at a temperature sufficient to render austenitenic steel. The followed by quenching and tempering to form martensite microstructure. In the comparison with carburizing, Carbonitriding is carried out at a lower temperature, for a shorter time and resultion finer microstructure. However, in our Industry, this method is not developed. The reason that the carbonitriding atmosphere is constituent unreasonably. On this paper, carbonitriding is prepared by mixture of Industrial gas, CO2; N2, NH3, with different ratio. The reasonable ratios is selected. Microstructure, microhardness are tested. This atmosphere is applied for carbonitriding for anchorage wedges, shows good result.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77877181","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.11.15
Hong Dong Anh Chi
In recent years, job candidates are currently required not only professional knowledge and skills but also English specifically implemented in particular occupations. Since then English for specific purposes (ESP) is the latest trend which has exponentially developed. The majority of universities have deployed diverse ESP courses in order to help learners address communicative needs as well as practices of particular professions. Ho Chi Minh City University of Transport has also provided interesting ESP courses supposed to assist engineering and technology students in their future careers. Not only inspired by the need to enable the learners of these courses to increase their knowledge of terminology in their fields but also integrating technology in language teaching and learning, this paper aims to suggest Quizlet a mobile and web-based study application as a tool to facilitate specialized vocabulary acquisition for learners of English for engineering and technology as well as for those who are learners of English for specific purposes in general. Thanks to Quizlet, both teachers and students will take full advantages from this innovative method that is probably proliferating their new learning and teaching experiences. Although the merits outweigh in this sphere, it is obvious that Quizlet should not be compulsory, but combined with other strategies to eventually give fruitful assistance to meet learners’ increasing demands on the verge of the industrial revolution 4.0.
{"title":"ADVANCED TEACHING AND LEARNING METHOD FOR ENGINEERING AND TECHNOLOGY STUDENTS AIMING AT THE STRATEGIC DEVELOPMENT OF THE INDUSTRY 4.0","authors":"Hong Dong Anh Chi","doi":"10.26480/jmerd.05.2019.11.15","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.11.15","url":null,"abstract":"In recent years, job candidates are currently required not only professional knowledge and skills but also English specifically implemented in particular occupations. Since then English for specific purposes (ESP) is the latest trend which has exponentially developed. The majority of universities have deployed diverse ESP courses in order to help learners address communicative needs as well as practices of particular professions. Ho Chi Minh City University of Transport has also provided interesting ESP courses supposed to assist engineering and technology students in their future careers. Not only inspired by the need to enable the learners of these courses to increase their knowledge of terminology in their fields but also integrating technology in language teaching and learning, this paper aims to suggest Quizlet a mobile and web-based study application as a tool to facilitate specialized vocabulary acquisition for learners of English for engineering and technology as well as for those who are learners of English for specific purposes in general. Thanks to Quizlet, both teachers and students will take full advantages from this innovative method that is probably proliferating their new learning and teaching experiences. Although the merits outweigh in this sphere, it is obvious that Quizlet should not be compulsory, but combined with other strategies to eventually give fruitful assistance to meet learners’ increasing demands on the verge of the industrial revolution 4.0.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85658748","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.153.157
Q. Hamad, Mayyadah S. Abed
This work deals with the preparation and characterization of two different types of natural powder which is nano-thyme (NT) and nano-pumpkin (NP) and investigation of its adding on the mechanical properties of epoxy matrix composite at different weight fractions (0.5%, 1%, 1.5%, 2%). Hand Lay-Up method was utilized to prepare the nanocomposite samples. Flexural, compression, impact, hardness tests for these samples had been investigated. The results showed that flexural modulus and compressive strength incremented with the weight fraction of both powder types in epoxy composite. While the values of flexural strain, flexural strength, shear stress, impact strength, and hardness decreased. The nano-thyme powder showed a varied behavior in epoxy matrix compared with nano-pumpkin powder.
{"title":"INVESTIGATION OF THYME AND PUMPKIN NANOPOWDERS REINFORCED EPOXY MATRIX COMPOSITES","authors":"Q. Hamad, Mayyadah S. Abed","doi":"10.26480/jmerd.05.2019.153.157","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.153.157","url":null,"abstract":"This work deals with the preparation and characterization of two different types of natural powder which is nano-thyme (NT) and nano-pumpkin (NP) and investigation of its adding on the mechanical properties of epoxy matrix composite at different weight fractions (0.5%, 1%, 1.5%, 2%). Hand Lay-Up method was utilized to prepare the nanocomposite samples. Flexural, compression, impact, hardness tests for these samples had been investigated. The results showed that flexural modulus and compressive strength incremented with the weight fraction of both powder types in epoxy composite. While the values of flexural strain, flexural strength, shear stress, impact strength, and hardness decreased. The nano-thyme powder showed a varied behavior in epoxy matrix compared with nano-pumpkin powder.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"207 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80477893","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.61.65
V. Nam
The aviation industry is responsible for up to 2.5 per cent of global CO2 emissions, according to the UN Intergovernmental Panel on Climate Change. Although the aviation sector will not transform to an environmentally friendly industry overnight, airports have the ability, the means and the opportunities to invest in sustainable development. Particularly, renewable energy could be an alternative scenario to escape the dilemma between the urge of high growth and the concern on environmental damage in air transport. The benefit is that renewable energy increases the options available to airports for their energy needs. There also provides with other advantages, i.e. producing fewer emissions and reducing the environmental footprint. In addition, installing renewable energy generation technologies on site at an airport can lower the carbon footprint with minimal impact to airport operations. The question is whether the deployment of renewable energy in Vietnam airports for becoming more “green (eco-friendly), sustainable” airports could become feasible when taking into account both prospects and challenges in such field. So as to answer, this paper will summarise the deployment of renewable energy in airports worldwide, then critically assess both prospects and constraints of renewable energy projects in Vietnam. Some experiences from the Europe airports, through applying the “Green Sustainable Airports (GSA)” and “Airport Carbon Accreditation” programmes to establish and boost strategies and solutions for more eco-friendly and efficient regional airports should be useful to provide suggestions.
根据联合国政府间气候变化专门委员会(UN Intergovernmental Panel on Climate Change)的数据，航空业对全球二氧化碳排放量的贡献率高达2.5%。虽然航空业不会在一夜之间转变为环境友好型产业，但机场有能力、有手段、也有机会投资于可持续发展。特别是，可再生能源可以成为一种替代方案，以摆脱高增长的冲动和对航空运输环境破坏的担忧之间的困境。这样做的好处是，可再生能源增加了机场满足其能源需求的选择。这也提供了其他优点，即产生更少的排放和减少环境足迹。此外，在机场现场安装可再生能源发电技术可以降低碳足迹，同时对机场运营的影响最小。问题是，考虑到这一领域的前景和挑战，在越南机场部署可再生能源以成为更加“绿色(环保)、可持续”的机场是否可行。为了回答这个问题，本文将总结可再生能源在全球机场的部署，然后批判性地评估越南可再生能源项目的前景和限制。欧洲机场通过实施“绿色可持续机场(GSA)”和“机场碳认证”计划，建立和推动更环保和高效的区域机场的战略和解决方案的一些经验应该是有用的，可以提供建议。
{"title":"GREEN SUSTAINABLE AIRPORTS: THE DEPLOYMENT OF RENEWABLE ENERGY AT VIETNAM AIRPORTS. IS THAT FEASIBLE?","authors":"V. Nam","doi":"10.26480/jmerd.05.2019.61.65","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.61.65","url":null,"abstract":"The aviation industry is responsible for up to 2.5 per cent of global CO2 emissions, according to the UN Intergovernmental Panel on Climate Change. Although the aviation sector will not transform to an environmentally friendly industry overnight, airports have the ability, the means and the opportunities to invest in sustainable development. Particularly, renewable energy could be an alternative scenario to escape the dilemma between the urge of high growth and the concern on environmental damage in air transport. The benefit is that renewable energy increases the options available to airports for their energy needs. There also provides with other advantages, i.e. producing fewer emissions and reducing the environmental footprint. In addition, installing renewable energy generation technologies on site at an airport can lower the carbon footprint with minimal impact to airport operations. The question is whether the deployment of renewable energy in Vietnam airports for becoming more “green (eco-friendly), sustainable” airports could become feasible when taking into account both prospects and challenges in such field. So as to answer, this paper will summarise the deployment of renewable energy in airports worldwide, then critically assess both prospects and constraints of renewable energy projects in Vietnam. Some experiences from the Europe airports, through applying the “Green Sustainable Airports (GSA)” and “Airport Carbon Accreditation” programmes to establish and boost strategies and solutions for more eco-friendly and efficient regional airports should be useful to provide suggestions.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90985092","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.28.33
V. Tuan, D. Lap, Nguyen Hai Yen, N. D. Nam
This paper presents the theoretical basis of the process of building programming to calculate the reasonable thickness and thickness of the shaft liners. Through this calculation program, it is possible to calculate and select the shaft liners for shaft system. The content can be calculated as thickness; shaft torque and reasonable residual. The program results were calculated for the vessel with the load of 950 tons. This result completely complies with the design requirements of the shaft liners.
{"title":"BUILDING THE PROGRAM OF CALCULATION FOR THE THICKNESS AND REASONABLE LANDSCAPE APPLYING THE SHAFT LINERS","authors":"V. Tuan, D. Lap, Nguyen Hai Yen, N. D. Nam","doi":"10.26480/jmerd.05.2019.28.33","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.28.33","url":null,"abstract":"This paper presents the theoretical basis of the process of building programming to calculate the reasonable thickness and thickness of the shaft liners. Through this calculation program, it is possible to calculate and select the shaft liners for shaft system. The content can be calculated as thickness; shaft torque and reasonable residual. The program results were calculated for the vessel with the load of 950 tons. This result completely complies with the design requirements of the shaft liners.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79639554","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.148.152
A. Ahmed, A. Eidan, Assaad Alsahlani, Entihaa R. Aga, M. Al-fahham
This work presents a theoretical study about the advantages of using thermosyphon heat exchanger (THEs) in the subtropical region (Iraq- Basrah) HVAC systems, where the weather is extremely hot with a normal DBT at (35-50) oC and RH of (35-90) %. The theoretical study compares three cases as follows: case (1) HVAC system that uses the precooling a refrigeration system and for the reheating process an electric heater, case (2) a HVAC system that uses for the precooling a refrigeration system and for reheating the condenser of the same refrigeration system used for precooling and case (3) for the precooling and preheating a thermosyphone system is used. The three cases are mathematically modeled, and corresponding programs are developed in Engineering Equation software. The input data in the programs is obtained experimentally form a facility corresponding to case 3) which is established in the Technical Institute of Najaf, Iraq. Preliminary results point out that the power consumption for case (3) is lower than the one for case (2). The power consumption for case (2) is lower than the one for case (1).
{"title":"EFFECT OF THERMOSYPHON HEAT EXCHANGER ON THE PERFORMANCE OF HVAC SYSTEMS IN SUBTROPICAL CLIMATIC – NUMERICAL INVESTIGATION","authors":"A. Ahmed, A. Eidan, Assaad Alsahlani, Entihaa R. Aga, M. Al-fahham","doi":"10.26480/jmerd.05.2019.148.152","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.148.152","url":null,"abstract":"This work presents a theoretical study about the advantages of using thermosyphon heat exchanger (THEs) in the subtropical region (Iraq- Basrah) HVAC systems, where the weather is extremely hot with a normal DBT at (35-50) oC and RH of (35-90) %. The theoretical study compares three cases as follows: case (1) HVAC system that uses the precooling a refrigeration system and for the reheating process an electric heater, case (2) a HVAC system that uses for the precooling a refrigeration system and for reheating the condenser of the same refrigeration system used for precooling and case (3) for the precooling and preheating a thermosyphone system is used. The three cases are mathematically modeled, and corresponding programs are developed in Engineering Equation software. The input data in the programs is obtained experimentally form a facility corresponding to case 3) which is established in the Technical Institute of Najaf, Iraq. Preliminary results point out that the power consumption for case (3) is lower than the one for case (2). The power consumption for case (2) is lower than the one for case (1).","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77102358","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 : 2019-08-29DOI: 10.26480/jmerd.05.2019.143.147
Thi Minh Hao Dong, X. Nguyen
Nowadays, the use of exhaust gas energy seems to be a very promising key to increase the energy efficiency in maritime field by converting the thermal losses of ship into useful energy sources such as exhaust boiler, exhaust turbo charging or mini electrical generator, which ensure the best utilization of the fuel, reduce emission met IMO requirements and reduce the operating costs. Diesel engine exhaust gas energy, certainly the most interesting among the waste heat sources of a ship because of the heat flow and temperature, is always considered to utilize due to the exhaust gas energy is approximately 25-30% of total energy of burned fuels in internal combustion engines. By installing the main propulsion plant with a waste heat recovery system (WHRS), the fuel can be utilized more economically, because energy lost in the exhaust gas flow is less. Moreover, the amount of CO2 emissions related to the mechanical power output of engines may be dropped off. The paper presents the review of utilization of exhaust gas heat in ship and suggests a heating up method for biodiesel or bio-oils which fuel in diesel engine in order to get dual benefit.
{"title":"EXHAUST GAS RECOVERY FROM MARINE DIESEL ENGINE IN ORDER TO REDUCE THE TOXIC EMISSION AND SAVE ENERGY: A MINI REVIEW","authors":"Thi Minh Hao Dong, X. Nguyen","doi":"10.26480/jmerd.05.2019.143.147","DOIUrl":"https://doi.org/10.26480/jmerd.05.2019.143.147","url":null,"abstract":"Nowadays, the use of exhaust gas energy seems to be a very promising key to increase the energy efficiency in maritime field by converting the thermal losses of ship into useful energy sources such as exhaust boiler, exhaust turbo charging or mini electrical generator, which ensure the best utilization of the fuel, reduce emission met IMO requirements and reduce the operating costs. Diesel engine exhaust gas energy, certainly the most interesting among the waste heat sources of a ship because of the heat flow and temperature, is always considered to utilize due to the exhaust gas energy is approximately 25-30% of total energy of burned fuels in internal combustion engines. By installing the main propulsion plant with a waste heat recovery system (WHRS), the fuel can be utilized more economically, because energy lost in the exhaust gas flow is less. Moreover, the amount of CO2 emissions related to the mechanical power output of engines may be dropped off. The paper presents the review of utilization of exhaust gas heat in ship and suggests a heating up method for biodiesel or bio-oils which fuel in diesel engine in order to get dual benefit.","PeriodicalId":16153,"journal":{"name":"Journal of Mechanical Engineering Research and Developments","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85759529","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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