Md. Tariqul Islam, Samit Chowdhury, M. Islam, Md. Sakhawat Hossain
The process of heat generation or absorption in metals under stress is caused by intermolecular interaction taken place after applying external force. Quantity of generated or absorbed heat depends on the magnitude of the applied force and the induced stress. The relationship between the heat and stress is one of the basic material property that determines the failure of that specific metal. So, it is important to know the relationship between the stress and formation of heat in material while designing a product. Two basic parameters, material property and induced stress, determine the quantity of generated or absorbed heat. Again, induced stress determines the fact if heat would be absorbed or be generated. No significant and to the point research work has been found about this subject, hence the aim of this study is to observe the generation of heat in different metals under different types of load condition. For the analysis, the chosen metals were Cast iron, Aluminum, AISI 4340 and Structural steel. These metals were chosen because of being widely used as engineering metals. The applied load conditions for the experiment were tension, compression and bending. The analysis was conducted using finite element technique in ComsolMultiphysics 5.3. The geometry of the metal was designed in Solidworks Premium 2016 and then imported in thermoelastic physics interface of ComsolMultiphysics. The loading conditions were varied to determine the relationship between the stress and generated heat and later compared with each other. The results show that the rate of generation of heat for AISI 4340 is greater than other metals at its ultimate strength. The temperature distribution shows that, the dissipation of temperature throughout the specimen is greater in aluminum than other three metals. These results will be useful in choosing metals that are to be used for fabricating devices employed in dynamic load condition.The process of heat generation or absorption in metals under stress is caused by intermolecular interaction taken place after applying external force. Quantity of generated or absorbed heat depends on the magnitude of the applied force and the induced stress. The relationship between the heat and stress is one of the basic material property that determines the failure of that specific metal. So, it is important to know the relationship between the stress and formation of heat in material while designing a product. Two basic parameters, material property and induced stress, determine the quantity of generated or absorbed heat. Again, induced stress determines the fact if heat would be absorbed or be generated. No significant and to the point research work has been found about this subject, hence the aim of this study is to observe the generation of heat in different metals under different types of load condition. For the analysis, the chosen metals were Cast iron, Aluminum, AISI 4340 and Structural steel. ...
{"title":"A comparative study of heat formation in various metals due to different types of stresses using finite element analysis","authors":"Md. Tariqul Islam, Samit Chowdhury, M. Islam, Md. Sakhawat Hossain","doi":"10.1063/1.5115960","DOIUrl":"https://doi.org/10.1063/1.5115960","url":null,"abstract":"The process of heat generation or absorption in metals under stress is caused by intermolecular interaction taken place after applying external force. Quantity of generated or absorbed heat depends on the magnitude of the applied force and the induced stress. The relationship between the heat and stress is one of the basic material property that determines the failure of that specific metal. So, it is important to know the relationship between the stress and formation of heat in material while designing a product. Two basic parameters, material property and induced stress, determine the quantity of generated or absorbed heat. Again, induced stress determines the fact if heat would be absorbed or be generated. No significant and to the point research work has been found about this subject, hence the aim of this study is to observe the generation of heat in different metals under different types of load condition. For the analysis, the chosen metals were Cast iron, Aluminum, AISI 4340 and Structural steel. These metals were chosen because of being widely used as engineering metals. The applied load conditions for the experiment were tension, compression and bending. The analysis was conducted using finite element technique in ComsolMultiphysics 5.3. The geometry of the metal was designed in Solidworks Premium 2016 and then imported in thermoelastic physics interface of ComsolMultiphysics. The loading conditions were varied to determine the relationship between the stress and generated heat and later compared with each other. The results show that the rate of generation of heat for AISI 4340 is greater than other metals at its ultimate strength. The temperature distribution shows that, the dissipation of temperature throughout the specimen is greater in aluminum than other three metals. These results will be useful in choosing metals that are to be used for fabricating devices employed in dynamic load condition.The process of heat generation or absorption in metals under stress is caused by intermolecular interaction taken place after applying external force. Quantity of generated or absorbed heat depends on the magnitude of the applied force and the induced stress. The relationship between the heat and stress is one of the basic material property that determines the failure of that specific metal. So, it is important to know the relationship between the stress and formation of heat in material while designing a product. Two basic parameters, material property and induced stress, determine the quantity of generated or absorbed heat. Again, induced stress determines the fact if heat would be absorbed or be generated. No significant and to the point research work has been found about this subject, hence the aim of this study is to observe the generation of heat in different metals under different types of load condition. For the analysis, the chosen metals were Cast iron, Aluminum, AISI 4340 and Structural steel. ...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115901070","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}
In this paper, a comprehensive numerical study on viscous incompressible fluid flow and heat transfer through a loosely coiled square duct has been presented. Spectral method is used as a basic too...
{"title":"Hydrodynamic instability with convective heat transfer through a curved channel with strong rotational speed","authors":"M. Hasan, R. Mondal, T. Kouchi, S. Yanase","doi":"10.1063/1.5115851","DOIUrl":"https://doi.org/10.1063/1.5115851","url":null,"abstract":"In this paper, a comprehensive numerical study on viscous incompressible fluid flow and heat transfer through a loosely coiled square duct has been presented. Spectral method is used as a basic too...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116997031","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}
{"title":"Preface: 8th BSME International Conference on Thermal Engineering","authors":"IslamA. K. M. Sadrul, A. Ruhul, Alimohammad","doi":"10.1063/1.5115841","DOIUrl":"https://doi.org/10.1063/1.5115841","url":null,"abstract":"","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127475720","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}
Md. Omarsany Bappy, Tahir Mahmud, Md. A. Ali, R. Aziz, A. Morshed
Condensation is the change of physical state of matter from gas phase into liquid phase. Condensation occurs whenever a vapor comes into contact with a surface at a temperature lower than the satur...
冷凝是物质的物理状态由气相变为液相的过程。每当蒸汽与温度低于饱和的表面接触时，就会发生冷凝。
{"title":"Experimental study of condensation behavior on a vertical micro-grooved copper plate","authors":"Md. Omarsany Bappy, Tahir Mahmud, Md. A. Ali, R. Aziz, A. Morshed","doi":"10.1063/1.5115911","DOIUrl":"https://doi.org/10.1063/1.5115911","url":null,"abstract":"Condensation is the change of physical state of matter from gas phase into liquid phase. Condensation occurs whenever a vapor comes into contact with a surface at a temperature lower than the satur...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125037270","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}
Ishtier Rahman, R. Nath, Sajid Nakvee, Md. Touhidur Rahman Evan
Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.
{"title":"A computational study on building’s roof shapes to utilize wind energy: Renewable energy application in Bangladesh","authors":"Ishtier Rahman, R. Nath, Sajid Nakvee, Md. Touhidur Rahman Evan","doi":"10.1063/1.5115950","DOIUrl":"https://doi.org/10.1063/1.5115950","url":null,"abstract":"Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130834871","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}
T. Sarkar, S. M. Arifuzzaman, E. S. Reza-Rabbi, Md. Shakhaoath Khan, S. Ahmmed
{"title":"Computational modelling of chemically reactive and radiative flow of Casson-Carreau nanofluids over an inclined cylindrical surface with bended Lorentz force presence in porous medium","authors":"T. Sarkar, S. M. Arifuzzaman, E. S. Reza-Rabbi, Md. Shakhaoath Khan, S. Ahmmed","doi":"10.1063/1.5115893","DOIUrl":"https://doi.org/10.1063/1.5115893","url":null,"abstract":"","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133814888","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}
Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been studied in details. Those results can be used to predict the flow behavior through veins and arteries and to detect the recirculation zone.Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been s...
{"title":"Non-Newtonian pulsatile blood flow dynamics around a Y-junction","authors":"D. Bhowmick, Md Toukir Hasan, A. Hasan","doi":"10.1063/1.5115936","DOIUrl":"https://doi.org/10.1063/1.5115936","url":null,"abstract":"Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been studied in details. Those results can be used to predict the flow behavior through veins and arteries and to detect the recirculation zone.Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been s...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488915","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}
S. Saha, Abrar A. Khan, Tanveer Islam Joy, A. Hoque, Rafsun Hossain Mridha, Md. Rubel Mia, M. Rahman
Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxic gases and visibility at different sections of the cleanroom are examined. It is found that for the case of the high fuel load in the packaging section in the 1st floor, 12 occupants fail to safely evacuate from the 5-storied pharmaceutical building. The effects of different specific operating characteristics and practices particular to a cleanroom facility on theoccupant evacuationare considered and analyzed.Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxi...
{"title":"Fire and evacuation modelling for a pharmaceutical cleanroom facility","authors":"S. Saha, Abrar A. Khan, Tanveer Islam Joy, A. Hoque, Rafsun Hossain Mridha, Md. Rubel Mia, M. Rahman","doi":"10.1063/1.5115929","DOIUrl":"https://doi.org/10.1063/1.5115929","url":null,"abstract":"Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxic gases and visibility at different sections of the cleanroom are examined. It is found that for the case of the high fuel load in the packaging section in the 1st floor, 12 occupants fail to safely evacuate from the 5-storied pharmaceutical building. The effects of different specific operating characteristics and practices particular to a cleanroom facility on theoccupant evacuationare considered and analyzed.Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxi...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128846255","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}
Plastic is made from wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects. The yearly use of plastics in Bangladesh has grown to 12,00,000 metric tons in 2018. A part of it is recycled but Bangladesh still generates 8,00,000 tons of plastic wastes every year. Disposal of plastic is of great environmental concern now-a-days, as it seizes centuries to decompose if left at its own. Conversion of waste plastic to fuel oil mitigates both plastic pollution problem and fuel crisis. This study focuses on the thermal degradation of polypropylene plastic wastes by pyrolysis process without any catalyst to produce fuel oil. A small scale batch type set up was built to perform thermal degradation of plastic. Polypropylene plastic wastes were cleaned, shredded and pyrolysed from 300-400°C for 60 minutes in this setup. The yield products were liquid fuel oil, gas and black solid plastic residue. These pyrolysed products were collected and characterized by different experimental and analytical methods. The conversion efficiency of oil achieved by the set up was 78% by mass. 73% plastic waste volume reduction was obtained by converting it into fuel oil from solid waste. Equivalent energy output calculated from measured heating value of pyrolytic oil which was obtained from 60 minutes pyrolysis was 12.8MJ/kg. Properties of the fuel oil produced such as - calorific value, viscosity, density, flash point and water content were measured and all of these properties were found to be very close to that of diesel and octane. The products obtained have potential values for further use as fuel oil, lubricating oil, diesel supplement etc which may provide solution as alternative energy resource.Plastic is made from wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects. The yearly use of plastics in Bangladesh has grown to 12,00,000 metric tons in 2018. A part of it is recycled but Bangladesh still generates 8,00,000 tons of plastic wastes every year. Disposal of plastic is of great environmental concern now-a-days, as it seizes centuries to decompose if left at its own. Conversion of waste plastic to fuel oil mitigates both plastic pollution problem and fuel crisis. This study focuses on the thermal degradation of polypropylene plastic wastes by pyrolysis process without any catalyst to produce fuel oil. A small scale batch type set up was built to perform thermal degradation of plastic. Polypropylene plastic wastes were cleaned, shredded and pyrolysed from 300-400°C for 60 minutes in this setup. The yield products were liquid fuel oil, gas and black solid plastic residue. These pyrolysed products were collected and characterized b...
{"title":"Conversion of waste polypropylene plastic into fuel","authors":"Mahbuba Jannat, S. Akter, M. Ehsan","doi":"10.1063/1.5115946","DOIUrl":"https://doi.org/10.1063/1.5115946","url":null,"abstract":"Plastic is made from wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects. The yearly use of plastics in Bangladesh has grown to 12,00,000 metric tons in 2018. A part of it is recycled but Bangladesh still generates 8,00,000 tons of plastic wastes every year. Disposal of plastic is of great environmental concern now-a-days, as it seizes centuries to decompose if left at its own. Conversion of waste plastic to fuel oil mitigates both plastic pollution problem and fuel crisis. This study focuses on the thermal degradation of polypropylene plastic wastes by pyrolysis process without any catalyst to produce fuel oil. A small scale batch type set up was built to perform thermal degradation of plastic. Polypropylene plastic wastes were cleaned, shredded and pyrolysed from 300-400°C for 60 minutes in this setup. The yield products were liquid fuel oil, gas and black solid plastic residue. These pyrolysed products were collected and characterized by different experimental and analytical methods. The conversion efficiency of oil achieved by the set up was 78% by mass. 73% plastic waste volume reduction was obtained by converting it into fuel oil from solid waste. Equivalent energy output calculated from measured heating value of pyrolytic oil which was obtained from 60 minutes pyrolysis was 12.8MJ/kg. Properties of the fuel oil produced such as - calorific value, viscosity, density, flash point and water content were measured and all of these properties were found to be very close to that of diesel and octane. The products obtained have potential values for further use as fuel oil, lubricating oil, diesel supplement etc which may provide solution as alternative energy resource.Plastic is made from wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects. The yearly use of plastics in Bangladesh has grown to 12,00,000 metric tons in 2018. A part of it is recycled but Bangladesh still generates 8,00,000 tons of plastic wastes every year. Disposal of plastic is of great environmental concern now-a-days, as it seizes centuries to decompose if left at its own. Conversion of waste plastic to fuel oil mitigates both plastic pollution problem and fuel crisis. This study focuses on the thermal degradation of polypropylene plastic wastes by pyrolysis process without any catalyst to produce fuel oil. A small scale batch type set up was built to perform thermal degradation of plastic. Polypropylene plastic wastes were cleaned, shredded and pyrolysed from 300-400°C for 60 minutes in this setup. The yield products were liquid fuel oil, gas and black solid plastic residue. These pyrolysed products were collected and characterized b...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128037341","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}
M. Islam, Shajedul Hoque Thakur, Abrar Ul Karim, S. Saha, M. Hasan
Two-dimensional, laminar, steady mixed convection heat transfer in a long horizontal channel has been investigated numerically with flow modulation through periodically distributed heat conducting rotating cylinders. The upper wall of the channel is maintained at constant low temperature and the lower wall is maintained at constant high temperature. A series of heat conducting rotating cylinders is placed periodically along the centerline of the channel with a spacing between two successive cylinders being equal to the height of the channel. The mathematical model of the present problem is governed by two-dimensional continuity, momentum and energy equations. The governing equations are then transformed to non-dimensional forms that are solved by using Galerkin finite element method with triangular discretization system. Water, air and liquid Gallium are considered as the working fluids. Numerical simulation is performed for case of pure mixed convection heat transfer characterized by a Richardson number of unity. Parametric simulation is carried out for a wide range of Reynolds numbers (1 ≤ Re ≤500) based on the dynamic condition of the rotating cylinder. Numerical results are presented and analyzed in terms of the distribution of streamline and isotherm patterns, local and average Nusselt number variation along the hot wall for different parametric conditions. It is found that, presence of heat conducting rotating cylinder increases the heat transfer significantly particularly in the lower range of Reynolds numbers considered in the present study and enhancement of heat transfer occurs as the Prandtl number increases. Thus, dynamic condition of the rotating cylinder and the thermophysical properties of working fluid play dominant roles for enhancing the heat transfer characteristics and flow behavior within the long horizontal channel.Two-dimensional, laminar, steady mixed convection heat transfer in a long horizontal channel has been investigated numerically with flow modulation through periodically distributed heat conducting rotating cylinders. The upper wall of the channel is maintained at constant low temperature and the lower wall is maintained at constant high temperature. A series of heat conducting rotating cylinders is placed periodically along the centerline of the channel with a spacing between two successive cylinders being equal to the height of the channel. The mathematical model of the present problem is governed by two-dimensional continuity, momentum and energy equations. The governing equations are then transformed to non-dimensional forms that are solved by using Galerkin finite element method with triangular discretization system. Water, air and liquid Gallium are considered as the working fluids. Numerical simulation is performed for case of pure mixed convection heat transfer characterized by a Richardson number ...
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