{"title":"Innovation Design and Applications of Robotic Manipulators in Intelligent Manufacturing System","authors":"Dan Zhang","doi":"10.11159/icmie22.002","DOIUrl":"https://doi.org/10.11159/icmie22.002","url":null,"abstract":"","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132858400","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}
Heat pumps have been used in buildings owing to their high energy efficiency and low carbon dioxide emissions. However, the performance degradation of heat pumps is inevitable under severe weather conditions. In recent years, the refrigerant injection technique has been extensively investigated to mitigate this problem. Among various injection cycles, the vapor injection cycle (VIC) is one of the most popular types and is widely used due to its simple control. Heo et al. [1] investigated the performance of a flash tank VIC at low temperatures. The coefficient of performance (COP) and heating capacity of the heat pump increased by 10% and 25%, respectively, at -15 ℃ . Qin et al. [2] tested an internal heat exchanger VIC for electric vehicles at -20 ℃. It was found that the heating capacity increas ed up to 31% compared to that of the conventional cycle. restrict the of warming Therefore, which is
热泵由于其高能效和低二氧化碳排放而被用于建筑物中。然而，在恶劣的天气条件下，热泵的性能下降是不可避免的。近年来，人们对制冷剂喷射技术进行了广泛的研究，以缓解这一问题。在各种喷射循环中，蒸汽喷射循环(VIC)因其控制简单而得到广泛应用，是最受欢迎的一种喷射循环。Heo等人研究了低温下闪蒸罐VIC的性能。在-15℃时，热泵的性能系数(COP)和供热能力分别提高了10%和25%。Qin et al.[2]在-20℃下测试了电动汽车内部热交换器VIC。研究发现，与传统循环相比，该循环的供热能力提高了31%。因此，这是
{"title":"Experimental Study on the Heating and Cooling Performance of a Vapor Injection Heat Pump Using Low-GWP Refrigerants","authors":"H. Maeng, Jinyoung Kim, Yongchan Kim","doi":"10.11159/htff22.148","DOIUrl":"https://doi.org/10.11159/htff22.148","url":null,"abstract":"Heat pumps have been used in buildings owing to their high energy efficiency and low carbon dioxide emissions. However, the performance degradation of heat pumps is inevitable under severe weather conditions. In recent years, the refrigerant injection technique has been extensively investigated to mitigate this problem. Among various injection cycles, the vapor injection cycle (VIC) is one of the most popular types and is widely used due to its simple control. Heo et al. [1] investigated the performance of a flash tank VIC at low temperatures. The coefficient of performance (COP) and heating capacity of the heat pump increased by 10% and 25%, respectively, at -15 ℃ . Qin et al. [2] tested an internal heat exchanger VIC for electric vehicles at -20 ℃. It was found that the heating capacity increas ed up to 31% compared to that of the conventional cycle. restrict the of warming Therefore, which is","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133107283","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}
Smoke management systems design is very important as it affect saving human lives in case of fire. The majority of firerelated deaths are caused by smoke inhalation of toxic gases, only 30% of deaths are due to fire burns. Recently, a great attention has been given to smoke management systems design validation using CFD simulations to ensure its effectiveness and compliance with fire codes regulations. CFD smoke simulation usually conducted using the inert fire species transport model, in which the fire source values specified at the fire inlet are assumed to be equivalent to an actual car fire products generation rates. Nonetheless, with the lack of a comprehensive conclusion on actual car fire products generation rates in literature, fire codes usually specify a certain fuel to represent a car fire, such as polyurethane as per UAE fire code. Considering the aforementioned, this work reviews literature on both polyurethane and actual car fires products generation rates, in an effort to conclude a proper fire products generation rates for CFD smoke simulations. Furthermore, this study demonstrates the use of the concluded fire source values to validate an underground car park smoke management systems design of a residential tower in UAE. The design is validated in compliance with the UAE fire code regulations considering both fire products concentrations and visibility analysis. The simulation results shows considerable difference in smoke generation between actual car fire and polyurethane fire. Mainly due to polyurethane higher fire growth rate and soot generation rates. On the other hand, the results illustrate that the smoke management system design satisfies the fire code CO and CO2 concentrations limits, yet it failed to comply with the fire code visibility requirements when polyurethane was used as fire source.
{"title":"Underground Car Park Smoke Management System Design Validation Using CFD Simulation: Car Fire Products Yields Rates system","authors":"Yosiki Nakamura, M. Hajjawi","doi":"10.11159/htff22.123","DOIUrl":"https://doi.org/10.11159/htff22.123","url":null,"abstract":"Smoke management systems design is very important as it affect saving human lives in case of fire. The majority of firerelated deaths are caused by smoke inhalation of toxic gases, only 30% of deaths are due to fire burns. Recently, a great attention has been given to smoke management systems design validation using CFD simulations to ensure its effectiveness and compliance with fire codes regulations. CFD smoke simulation usually conducted using the inert fire species transport model, in which the fire source values specified at the fire inlet are assumed to be equivalent to an actual car fire products generation rates. Nonetheless, with the lack of a comprehensive conclusion on actual car fire products generation rates in literature, fire codes usually specify a certain fuel to represent a car fire, such as polyurethane as per UAE fire code. Considering the aforementioned, this work reviews literature on both polyurethane and actual car fires products generation rates, in an effort to conclude a proper fire products generation rates for CFD smoke simulations. Furthermore, this study demonstrates the use of the concluded fire source values to validate an underground car park smoke management systems design of a residential tower in UAE. The design is validated in compliance with the UAE fire code regulations considering both fire products concentrations and visibility analysis. The simulation results shows considerable difference in smoke generation between actual car fire and polyurethane fire. Mainly due to polyurethane higher fire growth rate and soot generation rates. On the other hand, the results illustrate that the smoke management system design satisfies the fire code CO and CO2 concentrations limits, yet it failed to comply with the fire code visibility requirements when polyurethane was used as fire source.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125488872","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}
Hydrothermal performances of two water-cooled thermal management systems (TMSs) for cooling lithium-ion batteries (LIBs) are compared through three-dimensional simulations of laminar flow and heat transfer in TMSs, as well as conduction heat transfer with volumetric heat generation inside the battery cell. Maximum cell temperature and temperature variation across the cell are used to evaluate thermal performances of TMSs. The TMSs are different from each other by location of outlet manifold. In the bottom outlet (BO) design, the outlet is located at the bottom of the TMS’s case, while in the middle outlet (MO) design, the outlet manifold is located at the middle of the TMS’s case. Both designs provide safe operational temperature for LIBs, although the thermal performance of BO design is slightly higher than that of the MO design. This is due to distribution of water over a larger surface area in the BO TMS compared with the MO TMS. To provide a better insight on practical applications of TMSs, their thermal performances are described based on pumping power. Due to a shorter path from the inlet to the outlet in the MO design, compared with the BO design, the pressure drop is lower in the MO TMS. As a result, at a given flow rate, the MO TMS operates with a lower pumping power compared with the BO TMS. The present study suggests that selecting an appropriate TMS highly depends on design priorities. If the main goal is to maintain the cell temperature as low as possible, the BO design is an effective TMS. If the design goal is to minimize the pumping power, the MO TMS is an effective cooling system.
{"title":"The Effect of Outlet Manifold Location of Liquid-Cooled Battery Thermal Management Systems on Pumping Power","authors":"Kuuku-Dadzie Botchway, M. Shaeri","doi":"10.11159/htff22.143","DOIUrl":"https://doi.org/10.11159/htff22.143","url":null,"abstract":"Hydrothermal performances of two water-cooled thermal management systems (TMSs) for cooling lithium-ion batteries (LIBs) are compared through three-dimensional simulations of laminar flow and heat transfer in TMSs, as well as conduction heat transfer with volumetric heat generation inside the battery cell. Maximum cell temperature and temperature variation across the cell are used to evaluate thermal performances of TMSs. The TMSs are different from each other by location of outlet manifold. In the bottom outlet (BO) design, the outlet is located at the bottom of the TMS’s case, while in the middle outlet (MO) design, the outlet manifold is located at the middle of the TMS’s case. Both designs provide safe operational temperature for LIBs, although the thermal performance of BO design is slightly higher than that of the MO design. This is due to distribution of water over a larger surface area in the BO TMS compared with the MO TMS. To provide a better insight on practical applications of TMSs, their thermal performances are described based on pumping power. Due to a shorter path from the inlet to the outlet in the MO design, compared with the BO design, the pressure drop is lower in the MO TMS. As a result, at a given flow rate, the MO TMS operates with a lower pumping power compared with the BO TMS. The present study suggests that selecting an appropriate TMS highly depends on design priorities. If the main goal is to maintain the cell temperature as low as possible, the BO design is an effective TMS. If the design goal is to minimize the pumping power, the MO TMS is an effective cooling system.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126189912","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}
Mouret Gaëlle, Ibrahim Mira, Becerril César, Cataldo Filippo
Power electronics like Insulated Gate Bipolar Transistors (IGBT), Central Processing Units (CPU), Graphics Processing Units (GPU), and diodes, among others are key pieces for the control of electronics embedded in the new generation (more electrical) aircraft. These power electronics are smaller and more and more efficient. However, the increase in their performance and their miniaturization also increases their heat release. A solution to cool down these power electronics is the Pulsated Heat Pipes (PHP), which are very efficient and passive two-phase flow heat exchangers. This work discusses the construction of a PHP predesign tool using surrogate modelling. For this purpose, the database generation, surrogate training, and performance in predicting the thermal resistance of different PHP geometries are presented.
{"title":"Surrogate Model for the Prediction of the Performance of a Tubular Pulsated Heat Pipe","authors":"Mouret Gaëlle, Ibrahim Mira, Becerril César, Cataldo Filippo","doi":"10.11159/htff22.151","DOIUrl":"https://doi.org/10.11159/htff22.151","url":null,"abstract":"Power electronics like Insulated Gate Bipolar Transistors (IGBT), Central Processing Units (CPU), Graphics Processing Units (GPU), and diodes, among others are key pieces for the control of electronics embedded in the new generation (more electrical) aircraft. These power electronics are smaller and more and more efficient. However, the increase in their performance and their miniaturization also increases their heat release. A solution to cool down these power electronics is the Pulsated Heat Pipes (PHP), which are very efficient and passive two-phase flow heat exchangers. This work discusses the construction of a PHP predesign tool using surrogate modelling. For this purpose, the database generation, surrogate training, and performance in predicting the thermal resistance of different PHP geometries are presented.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129981243","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}
Fin-tube heat exchangers have been used in wide range of industries including refrigeration, air conditioning, and food processing owing to its unique configuration. In most applications of fin-tube heat exchangers, the performance is highly constricted by the heat resistance of air, owing to its low heat transfer coefficient. Thus, to make more effective and compact heat transfer system, it is essential to enhance the air-side heat transfer coefficient. The heat transfer enhancement technique is largely divided into two parts: passive and active techniques. Passive technique refers to an enhancement method which does not require additional energy input. In terms of the active technique, which requires additional energy input, various enhancement techniques are under research. Among those, enhancement by forced vibration attracted the interest of many researchers.
{"title":"Experimental Study on Air-Side Heat Transfer Enhancement of Fin-Tube Heat Exchanger under Vibrational Conditions","authors":"MinJoong Kim, Yongchan Kim","doi":"10.11159/htff22.147","DOIUrl":"https://doi.org/10.11159/htff22.147","url":null,"abstract":"Fin-tube heat exchangers have been used in wide range of industries including refrigeration, air conditioning, and food processing owing to its unique configuration. In most applications of fin-tube heat exchangers, the performance is highly constricted by the heat resistance of air, owing to its low heat transfer coefficient. Thus, to make more effective and compact heat transfer system, it is essential to enhance the air-side heat transfer coefficient. The heat transfer enhancement technique is largely divided into two parts: passive and active techniques. Passive technique refers to an enhancement method which does not require additional energy input. In terms of the active technique, which requires additional energy input, various enhancement techniques are under research. Among those, enhancement by forced vibration attracted the interest of many researchers.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129770489","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}
Extended Abstract Friction Stir Spot Welding (FSSW) is an effective method of welding aluminum sheet that is utilized in a variety of applications [1]. Because of its numerous advantages, such as a high strength-to-weight ratio, aluminium alloys are widely utilized in the automotive and aerospace industries. However, when the aluminum sheet is thin, several difficulties may arise, such as the need for low heat input during welding to avoid sheet warping [2]. In such cases, the FSSW method outperforms other welding processes for welding thin sheets. These gains of the FSSW method are dependent on the process parameters. The most effective parameters in the welding of sheets using the FSSW method are rotational speed, weld plunge distance, and stirrer tip profile, and high-quality welded sheets can be produced by combining these parameters appropriately. Most studies on this issue in the literature have used aluminum sheets with a thickness of 2 mm or greater [3]. There have been few studies on the welding of thinner plates through using FSSW method [4]. For this reason, the welding of thin aluminum alloy sheets with a thickness of less than 2 mm using the FSSW method were investigated in this study. The effects of the different effective process parameters which including tool geometries, tool rotation, and plunge speed on the quality of welded aluminum sheets were evaluated. The most cost-effective method in welding studies is modelling or simulation, and the goal
{"title":"Investigation of the Effects of Process Parameters for Friction Stir Spot Welding of Thin Al 6061 Sheet","authors":"Serkan Gündoğdu, O. Ertugrul, Ege Anıl Diler","doi":"10.11159/mmme22.138","DOIUrl":"https://doi.org/10.11159/mmme22.138","url":null,"abstract":"Extended Abstract Friction Stir Spot Welding (FSSW) is an effective method of welding aluminum sheet that is utilized in a variety of applications [1]. Because of its numerous advantages, such as a high strength-to-weight ratio, aluminium alloys are widely utilized in the automotive and aerospace industries. However, when the aluminum sheet is thin, several difficulties may arise, such as the need for low heat input during welding to avoid sheet warping [2]. In such cases, the FSSW method outperforms other welding processes for welding thin sheets. These gains of the FSSW method are dependent on the process parameters. The most effective parameters in the welding of sheets using the FSSW method are rotational speed, weld plunge distance, and stirrer tip profile, and high-quality welded sheets can be produced by combining these parameters appropriately. Most studies on this issue in the literature have used aluminum sheets with a thickness of 2 mm or greater [3]. There have been few studies on the welding of thinner plates through using FSSW method [4]. For this reason, the welding of thin aluminum alloy sheets with a thickness of less than 2 mm using the FSSW method were investigated in this study. The effects of the different effective process parameters which including tool geometries, tool rotation, and plunge speed on the quality of welded aluminum sheets were evaluated. The most cost-effective method in welding studies is modelling or simulation, and the goal","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121209051","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}
The global attention toward miniaturization technologies puts compact electronic devices at the core of thermal management research. The high compact density electronic devices are very high heat-dissipating systems. The removal of this high heat flux is imperative to maintain the reliability and durability of these devices. Among many heat removal systems, Pulsating Heat Pipes (PHP) have shown both their standalone and hybrid utility. Their miniature size with wickless structure and performance in different operating conditions put them as a promising heat removing agent in small area applications, be it terrestrial or space. Despite their simple geometry, PHPs exhibit complex dynamical characteristics due to the multiphysics processes involved during the transient operation. The complex dynamics is not easy to explain while analyzing the system by the mathematical models, used to obtain operating characteristics. The interplay between the multiphysics interactions makes the system highly nonlinear, which is very sensitive to the initial conditions. Therefore, the fundamental problem lies in the understanding of the dynamics in the nonlinear regime. Nonlinear stability analysis has been carried out on a state-of-the-art model. The oscillatory behavior of the liquid slug is modeled similarly to the springmass system. The parameters related to several thermodynamic processes have been varied to capture the change in the dynamics using codimension one and two analyses. The system of non-linear differential equations, containing the conservation equations for the liquid slug and vapor plug separately, has been solved numerically using MATCONT. Bifurcation analysis shows the sudden changes in the dynamics while varying the parameters and the start-up operating conditions also match with the literature.
{"title":"Pulsating Heat Pipe: Operation in Nonlinear Regime","authors":"Alok Kumar, Suneet Singh, Nadeem Ahmed","doi":"10.11159/htff22.132","DOIUrl":"https://doi.org/10.11159/htff22.132","url":null,"abstract":"The global attention toward miniaturization technologies puts compact electronic devices at the core of thermal management research. The high compact density electronic devices are very high heat-dissipating systems. The removal of this high heat flux is imperative to maintain the reliability and durability of these devices. Among many heat removal systems, Pulsating Heat Pipes (PHP) have shown both their standalone and hybrid utility. Their miniature size with wickless structure and performance in different operating conditions put them as a promising heat removing agent in small area applications, be it terrestrial or space. Despite their simple geometry, PHPs exhibit complex dynamical characteristics due to the multiphysics processes involved during the transient operation. The complex dynamics is not easy to explain while analyzing the system by the mathematical models, used to obtain operating characteristics. The interplay between the multiphysics interactions makes the system highly nonlinear, which is very sensitive to the initial conditions. Therefore, the fundamental problem lies in the understanding of the dynamics in the nonlinear regime. Nonlinear stability analysis has been carried out on a state-of-the-art model. The oscillatory behavior of the liquid slug is modeled similarly to the springmass system. The parameters related to several thermodynamic processes have been varied to capture the change in the dynamics using codimension one and two analyses. The system of non-linear differential equations, containing the conservation equations for the liquid slug and vapor plug separately, has been solved numerically using MATCONT. Bifurcation analysis shows the sudden changes in the dynamics while varying the parameters and the start-up operating conditions also match with the literature.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115277769","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}
Pei-Ing Lee, Shih-Ying Chang, Yu-Kai Sun, T. Chuang
- The interfacial microstructure and shear strength properties of solid-state diffusion bonded 2024 aluminium alloy were investigated under varied surface roughness. The results indicated a high strength of 79.7 MPa for specimens electro-polished after diffusion bonding at 490°C for 120 min under pressure of 5 MPa, approximately 10 times above the minimally required shear strength of 7.9 MPa of the MIL-STD-883G specification. It was also found that the shear strength increased with increases in bonding temperature from 440°C to 490°C and bonding time from 30 to 240 min.
{"title":"Effects of Surface Roughness on the Diffusion Bonding of 2024 Aluminum Alloy","authors":"Pei-Ing Lee, Shih-Ying Chang, Yu-Kai Sun, T. Chuang","doi":"10.11159/mmme22.119","DOIUrl":"https://doi.org/10.11159/mmme22.119","url":null,"abstract":"- The interfacial microstructure and shear strength properties of solid-state diffusion bonded 2024 aluminium alloy were investigated under varied surface roughness. The results indicated a high strength of 79.7 MPa for specimens electro-polished after diffusion bonding at 490°C for 120 min under pressure of 5 MPa, approximately 10 times above the minimally required shear strength of 7.9 MPa of the MIL-STD-883G specification. It was also found that the shear strength increased with increases in bonding temperature from 440°C to 490°C and bonding time from 30 to 240 min.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131036259","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}
- Thermal performances of multi-layered cold plates (CPs) with varying numbers of channels are investigated through three-dimensional simulation of laminar flow and heat transfer. Thermal performances are characterized by the maximum temperature and temperature variation across the heating surface. The thermal performances are presented as functions of flow rates and pumping power to provide better insight on CP’s practical applications. It was found that at both a given flow rate and pumping power, increasing the number of layers monotonically enhances the heat transfer rate.; however, the percentage of enhancement of heat transfer is reduced by increasing the number of layers beyond two due to additional thermal resistance experienced between the lower-level channels/layers and the heat source. The findings suggest the existence of a threshold number of layers such that beyond that threshold, the heat transfer is not enhanced.
{"title":"Thermal Performances of Multi-Layered Liquid Cold Plates","authors":"Andoniaina M. Randriambololona, M. Shaeri","doi":"10.11159/htff22.115","DOIUrl":"https://doi.org/10.11159/htff22.115","url":null,"abstract":"- Thermal performances of multi-layered cold plates (CPs) with varying numbers of channels are investigated through three-dimensional simulation of laminar flow and heat transfer. Thermal performances are characterized by the maximum temperature and temperature variation across the heating surface. The thermal performances are presented as functions of flow rates and pumping power to provide better insight on CP’s practical applications. It was found that at both a given flow rate and pumping power, increasing the number of layers monotonically enhances the heat transfer rate.; however, the percentage of enhancement of heat transfer is reduced by increasing the number of layers beyond two due to additional thermal resistance experienced between the lower-level channels/layers and the heat source. The findings suggest the existence of a threshold number of layers such that beyond that threshold, the heat transfer is not enhanced.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127171758","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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