Pub Date : 2024-02-12DOI: 10.1177/09544089241230880
Nitish Kumar, Pradyumna Ghosh, P. Shukla, Roopchand Tandon
Nucleate boiling is known for its high heat transfer capacity which occurs at a reasonably low temperature difference between the surface and saturated liquid due to the rapid vaporization process. The vaporization process and boiling heat transfer (BHT) primarily depend on surface morphology and wettability. In this article, surface morphology and wettability of smooth copper surfaces have been altered by coating with binary oxide nanoparticles. Three different combinations of composite coatings: TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 are considered and pool boiling performances have been investigated in demineralized water. Samples have been prepared using electrophoretic deposition techniques in binary oxide nanofluid of 0.1 wt. % concentration. The coating was performed for a fixed duration of 10 min in a medium of hybrid nanofluids of TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 which are referred to as S1, S2 and S3, respectively, in the text. The surface morphology, wettability and coating layer thickness of the sample are varied with the coating duration. The smooth copper surface is hydrophilic while coated samples are hydrophobic by nature. Experiments were carried out on all surfaces, and the results were compared with the smooth copper surface. The maximum enhancements in BHT coefficient for surfaces S1, S2 and S3 are 38%, 43% and 59%, respectively, corresponding to heat flux of ∼275,∼ 200 and ∼220 kW/m2. The reduction in boiling incipient temperature is 0.7, 3.6 and 4.4°C, respectively.
{"title":"Effects of composite coatings on pool boiling performance characteristics in demineralized water","authors":"Nitish Kumar, Pradyumna Ghosh, P. Shukla, Roopchand Tandon","doi":"10.1177/09544089241230880","DOIUrl":"https://doi.org/10.1177/09544089241230880","url":null,"abstract":"Nucleate boiling is known for its high heat transfer capacity which occurs at a reasonably low temperature difference between the surface and saturated liquid due to the rapid vaporization process. The vaporization process and boiling heat transfer (BHT) primarily depend on surface morphology and wettability. In this article, surface morphology and wettability of smooth copper surfaces have been altered by coating with binary oxide nanoparticles. Three different combinations of composite coatings: TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 are considered and pool boiling performances have been investigated in demineralized water. Samples have been prepared using electrophoretic deposition techniques in binary oxide nanofluid of 0.1 wt. % concentration. The coating was performed for a fixed duration of 10 min in a medium of hybrid nanofluids of TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 which are referred to as S1, S2 and S3, respectively, in the text. The surface morphology, wettability and coating layer thickness of the sample are varied with the coating duration. The smooth copper surface is hydrophilic while coated samples are hydrophobic by nature. Experiments were carried out on all surfaces, and the results were compared with the smooth copper surface. The maximum enhancements in BHT coefficient for surfaces S1, S2 and S3 are 38%, 43% and 59%, respectively, corresponding to heat flux of ∼275,∼ 200 and ∼220 kW/m2. The reduction in boiling incipient temperature is 0.7, 3.6 and 4.4°C, respectively.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784759","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 : 2024-02-12DOI: 10.1177/09544089241230267
Vardhan Mittal, Venugopal Arumuru
This article presents a novel method of utilizing the thrust generated by synthetic jet actuators to generate torque. Piezoelectric-based synthetic jet actuators were used to create a device with two isolated cavities and orifices. Weight balance and hotwire anemometry were used to quantify the thrust generated by the synthetic jet actuator. Each orifice provides a maximum thrust of 0.15gf, thereby generating a net maximum torque of 17.17gf mm. The torque generated can be used to produce a rotary motion. Such a novel device may be useful where a high-momentum rotary jet may be employed for heat transfer and mixing enhancement.
本文介绍了一种利用合成射流致动器产生的推力来产生扭矩的新方法。压电式合成射流致动器被用来制造一个具有两个隔离腔和孔的装置。重量平衡和热线风速测量被用来量化合成射流致动器产生的推力。每个孔口可提供 0.15gf 的最大推力，从而产生 17.17gf mm 的净最大扭矩。产生的扭矩可用于产生旋转运动。这种新颖的装置可用于利用高动量旋转射流进行传热和增强混合。
{"title":"Torque generation using synthetic jet actuators","authors":"Vardhan Mittal, Venugopal Arumuru","doi":"10.1177/09544089241230267","DOIUrl":"https://doi.org/10.1177/09544089241230267","url":null,"abstract":"This article presents a novel method of utilizing the thrust generated by synthetic jet actuators to generate torque. Piezoelectric-based synthetic jet actuators were used to create a device with two isolated cavities and orifices. Weight balance and hotwire anemometry were used to quantify the thrust generated by the synthetic jet actuator. Each orifice provides a maximum thrust of 0.15gf, thereby generating a net maximum torque of 17.17gf mm. The torque generated can be used to produce a rotary motion. Such a novel device may be useful where a high-momentum rotary jet may be employed for heat transfer and mixing enhancement.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"103 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139843364","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 : 2024-02-12DOI: 10.1177/09544089241230154
Brajesh Kumar Kanchan, Guddakesh Kumar Chandan, Mohd Aslam
Improving thermal performance while minimizing pressure differences and irreversibility characteristics remains a persistent challenge in thermo-mechanical systems. This study investigates a corrugated channel with different profiles (triangular, square, and elliptical) for steady, laminar, incompressible, and mixed convective flow through a backward-facing step. The impact of corrugated wall geometrical characteristics, such as height, width, and angle, on hydrothermal performance is explored. Additionally, the study investigates the influence of inline and staggered arrangements for various channel configurations. The finite element method is employed for numerical investigation of thermohydraulic and irreversibility characteristics. Results, presented through streamlines, contours, and line plots, reveal a significant modulation of reattachment length based on corrugate architecture. Notably, the local Nusselt number is highest at the initial interaction with the corrugated channel, regardless of the channel configuration. Hydrothermal measurements highlight elliptical configurations as optimal, exhibiting a 60% improvement in thermal performance compared to a non-corrugated channel. Moreover, increasing corrugate height results in higher Nusselt numbers, pressure drops, and irreversibility. Reduced corrugate width leads to a higher Nusselt number due to the formation of a secondary recirculation zone. An elliptical corrugate with a 0° angle inclination yields the highest Nusselt number by facilitating a stronger recirculation zone. Thus, optimal corrugated wall configuration involves higher height, lower width, and no angle inclination, emphasizing the significant impact of these parameters on hydrothermal performance and their importance as design characteristics.
{"title":"Numerical investigation of corrugated wall configuration on hydrothermal performance and irreversibility characteristics","authors":"Brajesh Kumar Kanchan, Guddakesh Kumar Chandan, Mohd Aslam","doi":"10.1177/09544089241230154","DOIUrl":"https://doi.org/10.1177/09544089241230154","url":null,"abstract":"Improving thermal performance while minimizing pressure differences and irreversibility characteristics remains a persistent challenge in thermo-mechanical systems. This study investigates a corrugated channel with different profiles (triangular, square, and elliptical) for steady, laminar, incompressible, and mixed convective flow through a backward-facing step. The impact of corrugated wall geometrical characteristics, such as height, width, and angle, on hydrothermal performance is explored. Additionally, the study investigates the influence of inline and staggered arrangements for various channel configurations. The finite element method is employed for numerical investigation of thermohydraulic and irreversibility characteristics. Results, presented through streamlines, contours, and line plots, reveal a significant modulation of reattachment length based on corrugate architecture. Notably, the local Nusselt number is highest at the initial interaction with the corrugated channel, regardless of the channel configuration. Hydrothermal measurements highlight elliptical configurations as optimal, exhibiting a 60% improvement in thermal performance compared to a non-corrugated channel. Moreover, increasing corrugate height results in higher Nusselt numbers, pressure drops, and irreversibility. Reduced corrugate width leads to a higher Nusselt number due to the formation of a secondary recirculation zone. An elliptical corrugate with a 0° angle inclination yields the highest Nusselt number by facilitating a stronger recirculation zone. Thus, optimal corrugated wall configuration involves higher height, lower width, and no angle inclination, emphasizing the significant impact of these parameters on hydrothermal performance and their importance as design characteristics.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"73 40","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139843891","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}
A comprehensive analysis investigated the impact of cutting speed, nozzle diameter, gas pressure and the addition of SiC and ZrO2 particles on the surface quality of aluminum alloy 6062. The correlation between experimental and predicted values was established using deep neural network (DNN), support vector machine regression and response surface methodology. To validate the models, root mean squared error and mean absolute error were computed for four hidden layers with the DNN approach. The surface roughness was significantly affected by the higher cutting speed (3000 mm/min) and lower nitrogen gas pressure (10 bar). The results from the developed models closely matched experimental data. Additionally, the study analyzed the impact of laser parameters on crack width due to rapid thermal changes. The scanning electron microscopy, energy-dispersive X-ray spectroscopy and optical microscopy were utilized to examine the laser-cut surface's microstructure for crack formation analysis.
综合分析研究了切削速度、喷嘴直径、气体压力以及添加 SiC 和 ZrO2 颗粒对铝合金 6062 表面质量的影响。利用深度神经网络（DNN）、支持向量机回归和响应面方法建立了实验值和预测值之间的相关性。为验证模型，计算了 DNN 方法下四个隐藏层的均方根误差和平均绝对误差。较高的切削速度（3000 毫米/分钟）和较低的氮气压力（10 巴）对表面粗糙度有明显影响。所建立模型的结果与实验数据非常吻合。此外，研究还分析了快速热变化导致的激光参数对裂纹宽度的影响。利用扫描电子显微镜、能量色散 X 射线光谱仪和光学显微镜检查了激光切割表面的微观结构，以分析裂纹的形成。
{"title":"Machine learning approach for prediction analysis of aluminium alloy on the surface roughness using CO2 laser machining","authors":"Vikas Sharma, Jaiinder Preet Singh, Roshan Raman, G. Bathla, Abhineet Saini","doi":"10.1177/09544089241231093","DOIUrl":"https://doi.org/10.1177/09544089241231093","url":null,"abstract":"A comprehensive analysis investigated the impact of cutting speed, nozzle diameter, gas pressure and the addition of SiC and ZrO2 particles on the surface quality of aluminum alloy 6062. The correlation between experimental and predicted values was established using deep neural network (DNN), support vector machine regression and response surface methodology. To validate the models, root mean squared error and mean absolute error were computed for four hidden layers with the DNN approach. The surface roughness was significantly affected by the higher cutting speed (3000 mm/min) and lower nitrogen gas pressure (10 bar). The results from the developed models closely matched experimental data. Additionally, the study analyzed the impact of laser parameters on crack width due to rapid thermal changes. The scanning electron microscopy, energy-dispersive X-ray spectroscopy and optical microscopy were utilized to examine the laser-cut surface's microstructure for crack formation analysis.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"60 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844442","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 : 2024-02-12DOI: 10.1177/09544089241230154
Brajesh Kumar Kanchan, Guddakesh Kumar Chandan, Mohd Aslam
Improving thermal performance while minimizing pressure differences and irreversibility characteristics remains a persistent challenge in thermo-mechanical systems. This study investigates a corrugated channel with different profiles (triangular, square, and elliptical) for steady, laminar, incompressible, and mixed convective flow through a backward-facing step. The impact of corrugated wall geometrical characteristics, such as height, width, and angle, on hydrothermal performance is explored. Additionally, the study investigates the influence of inline and staggered arrangements for various channel configurations. The finite element method is employed for numerical investigation of thermohydraulic and irreversibility characteristics. Results, presented through streamlines, contours, and line plots, reveal a significant modulation of reattachment length based on corrugate architecture. Notably, the local Nusselt number is highest at the initial interaction with the corrugated channel, regardless of the channel configuration. Hydrothermal measurements highlight elliptical configurations as optimal, exhibiting a 60% improvement in thermal performance compared to a non-corrugated channel. Moreover, increasing corrugate height results in higher Nusselt numbers, pressure drops, and irreversibility. Reduced corrugate width leads to a higher Nusselt number due to the formation of a secondary recirculation zone. An elliptical corrugate with a 0° angle inclination yields the highest Nusselt number by facilitating a stronger recirculation zone. Thus, optimal corrugated wall configuration involves higher height, lower width, and no angle inclination, emphasizing the significant impact of these parameters on hydrothermal performance and their importance as design characteristics.
{"title":"Numerical investigation of corrugated wall configuration on hydrothermal performance and irreversibility characteristics","authors":"Brajesh Kumar Kanchan, Guddakesh Kumar Chandan, Mohd Aslam","doi":"10.1177/09544089241230154","DOIUrl":"https://doi.org/10.1177/09544089241230154","url":null,"abstract":"Improving thermal performance while minimizing pressure differences and irreversibility characteristics remains a persistent challenge in thermo-mechanical systems. This study investigates a corrugated channel with different profiles (triangular, square, and elliptical) for steady, laminar, incompressible, and mixed convective flow through a backward-facing step. The impact of corrugated wall geometrical characteristics, such as height, width, and angle, on hydrothermal performance is explored. Additionally, the study investigates the influence of inline and staggered arrangements for various channel configurations. The finite element method is employed for numerical investigation of thermohydraulic and irreversibility characteristics. Results, presented through streamlines, contours, and line plots, reveal a significant modulation of reattachment length based on corrugate architecture. Notably, the local Nusselt number is highest at the initial interaction with the corrugated channel, regardless of the channel configuration. Hydrothermal measurements highlight elliptical configurations as optimal, exhibiting a 60% improvement in thermal performance compared to a non-corrugated channel. Moreover, increasing corrugate height results in higher Nusselt numbers, pressure drops, and irreversibility. Reduced corrugate width leads to a higher Nusselt number due to the formation of a secondary recirculation zone. An elliptical corrugate with a 0° angle inclination yields the highest Nusselt number by facilitating a stronger recirculation zone. Thus, optimal corrugated wall configuration involves higher height, lower width, and no angle inclination, emphasizing the significant impact of these parameters on hydrothermal performance and their importance as design characteristics.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"42 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784035","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 : 2024-02-12DOI: 10.1177/09544089241228942
Rama Thirumurugan, M. Padmanaban, T. Ramkumar, D. Shanmugam
The intended research is to improve the mechanical and tribological properties of Al-Ni-Co alloy by reinforcing the alloy with multiwall carbon nanotubes (MWCNT) using powder metallurgy. In this work MWCNT content varied from 0.5, 1.0, and 1.5 as wt. % and mixed with the Al-Ni-Co matrix. The composites are fabricated by cold compaction and conventional sintering technique. The presence of homogenous distribution was analyzed by using scanning electron microscope (SEM) with energy dispersive spectroscopy. The hardness of the composites was also explored by using Vickers' indentation and found that porosity plays a vital role and it directly influences the hardness and the mechanical properties. The wear behavior of the composites was measured using the Pin-on-Disc method at room temperature. The results revealed that 84.5Al-10Ni-4Co-1.5MWCNT possessed less volume loss (0.458 mm3) and coefficient of friction (0.45) compared to other samples. After wear analysis, the surface morphology was analyzed using SEM. The outcome of the research is MWCNT plays a vital role to improve the mechanical and tribological properties of Al-Ni-Co composites.
{"title":"Investigation of mechanical and tribological behavior of Al-Ni-Co-MWCNT composites prepared by powder metallurgy technique","authors":"Rama Thirumurugan, M. Padmanaban, T. Ramkumar, D. Shanmugam","doi":"10.1177/09544089241228942","DOIUrl":"https://doi.org/10.1177/09544089241228942","url":null,"abstract":"The intended research is to improve the mechanical and tribological properties of Al-Ni-Co alloy by reinforcing the alloy with multiwall carbon nanotubes (MWCNT) using powder metallurgy. In this work MWCNT content varied from 0.5, 1.0, and 1.5 as wt. % and mixed with the Al-Ni-Co matrix. The composites are fabricated by cold compaction and conventional sintering technique. The presence of homogenous distribution was analyzed by using scanning electron microscope (SEM) with energy dispersive spectroscopy. The hardness of the composites was also explored by using Vickers' indentation and found that porosity plays a vital role and it directly influences the hardness and the mechanical properties. The wear behavior of the composites was measured using the Pin-on-Disc method at room temperature. The results revealed that 84.5Al-10Ni-4Co-1.5MWCNT possessed less volume loss (0.458 mm3) and coefficient of friction (0.45) compared to other samples. After wear analysis, the surface morphology was analyzed using SEM. The outcome of the research is MWCNT plays a vital role to improve the mechanical and tribological properties of Al-Ni-Co composites.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"85 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784493","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}
A comprehensive analysis investigated the impact of cutting speed, nozzle diameter, gas pressure and the addition of SiC and ZrO2 particles on the surface quality of aluminum alloy 6062. The correlation between experimental and predicted values was established using deep neural network (DNN), support vector machine regression and response surface methodology. To validate the models, root mean squared error and mean absolute error were computed for four hidden layers with the DNN approach. The surface roughness was significantly affected by the higher cutting speed (3000 mm/min) and lower nitrogen gas pressure (10 bar). The results from the developed models closely matched experimental data. Additionally, the study analyzed the impact of laser parameters on crack width due to rapid thermal changes. The scanning electron microscopy, energy-dispersive X-ray spectroscopy and optical microscopy were utilized to examine the laser-cut surface's microstructure for crack formation analysis.
综合分析研究了切削速度、喷嘴直径、气体压力以及添加 SiC 和 ZrO2 颗粒对铝合金 6062 表面质量的影响。利用深度神经网络（DNN）、支持向量机回归和响应面方法建立了实验值和预测值之间的相关性。为验证模型，计算了 DNN 方法下四个隐藏层的均方根误差和平均绝对误差。较高的切削速度（3000 毫米/分钟）和较低的氮气压力（10 巴）对表面粗糙度有明显影响。所建立模型的结果与实验数据非常吻合。此外，研究还分析了快速热变化导致的激光参数对裂纹宽度的影响。利用扫描电子显微镜、能量色散 X 射线光谱仪和光学显微镜检查了激光切割表面的微观结构，以分析裂纹的形成。
{"title":"Machine learning approach for prediction analysis of aluminium alloy on the surface roughness using CO2 laser machining","authors":"Vikas Sharma, Jaiinder Preet Singh, Roshan Raman, G. Bathla, Abhineet Saini","doi":"10.1177/09544089241231093","DOIUrl":"https://doi.org/10.1177/09544089241231093","url":null,"abstract":"A comprehensive analysis investigated the impact of cutting speed, nozzle diameter, gas pressure and the addition of SiC and ZrO2 particles on the surface quality of aluminum alloy 6062. The correlation between experimental and predicted values was established using deep neural network (DNN), support vector machine regression and response surface methodology. To validate the models, root mean squared error and mean absolute error were computed for four hidden layers with the DNN approach. The surface roughness was significantly affected by the higher cutting speed (3000 mm/min) and lower nitrogen gas pressure (10 bar). The results from the developed models closely matched experimental data. Additionally, the study analyzed the impact of laser parameters on crack width due to rapid thermal changes. The scanning electron microscopy, energy-dispersive X-ray spectroscopy and optical microscopy were utilized to examine the laser-cut surface's microstructure for crack formation analysis.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"81 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784589","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 : 2024-02-12DOI: 10.1177/09544089241228105
Kumar Gaurav, Suresh Kant Verma
Supply of energy against continuous increase in energy demand is a great challenge for the present time. This has compelled the researchers to develop energy-efficient and performance-enhanced devices. Solar energy, being the capable source to supply the clean energy can be harvested with the help of flat plate solar collectors (FPSCs). In order to enhance the thermal performance of FPSC researchers have considered various aspects, for example, design modification, heat transfer fluid having enhanced thermophysical properties, use of nanofluids, reduction in heat loss, use of enhancement devices, use of phase change materials and porous materials. The present article describes in detail these methods and compares the results obtained by the respective researches. Experimental as well as numerical works have also been presented. A comprehensive review for the thermal performance enhancement techniques used in FPSC has been presented. The objective of this review is to provide a valuable framework for evaluating and comparing different techniques for enhancing FPSC performance. The review aims to help identify the most appropriate approach and gaps in current research and proposes potential areas for future enhancements, which is expected to assist researchers.
{"title":"Critical review on thermal performance enhancement techniques for flat plate solar collectors","authors":"Kumar Gaurav, Suresh Kant Verma","doi":"10.1177/09544089241228105","DOIUrl":"https://doi.org/10.1177/09544089241228105","url":null,"abstract":"Supply of energy against continuous increase in energy demand is a great challenge for the present time. This has compelled the researchers to develop energy-efficient and performance-enhanced devices. Solar energy, being the capable source to supply the clean energy can be harvested with the help of flat plate solar collectors (FPSCs). In order to enhance the thermal performance of FPSC researchers have considered various aspects, for example, design modification, heat transfer fluid having enhanced thermophysical properties, use of nanofluids, reduction in heat loss, use of enhancement devices, use of phase change materials and porous materials. The present article describes in detail these methods and compares the results obtained by the respective researches. Experimental as well as numerical works have also been presented. A comprehensive review for the thermal performance enhancement techniques used in FPSC has been presented. The objective of this review is to provide a valuable framework for evaluating and comparing different techniques for enhancing FPSC performance. The review aims to help identify the most appropriate approach and gaps in current research and proposes potential areas for future enhancements, which is expected to assist researchers.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"63 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844379","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 : 2024-02-12DOI: 10.1177/09544089241230880
Nitish Kumar, Pradyumna Ghosh, P. Shukla, Roopchand Tandon
Nucleate boiling is known for its high heat transfer capacity which occurs at a reasonably low temperature difference between the surface and saturated liquid due to the rapid vaporization process. The vaporization process and boiling heat transfer (BHT) primarily depend on surface morphology and wettability. In this article, surface morphology and wettability of smooth copper surfaces have been altered by coating with binary oxide nanoparticles. Three different combinations of composite coatings: TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 are considered and pool boiling performances have been investigated in demineralized water. Samples have been prepared using electrophoretic deposition techniques in binary oxide nanofluid of 0.1 wt. % concentration. The coating was performed for a fixed duration of 10 min in a medium of hybrid nanofluids of TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 which are referred to as S1, S2 and S3, respectively, in the text. The surface morphology, wettability and coating layer thickness of the sample are varied with the coating duration. The smooth copper surface is hydrophilic while coated samples are hydrophobic by nature. Experiments were carried out on all surfaces, and the results were compared with the smooth copper surface. The maximum enhancements in BHT coefficient for surfaces S1, S2 and S3 are 38%, 43% and 59%, respectively, corresponding to heat flux of ∼275,∼ 200 and ∼220 kW/m2. The reduction in boiling incipient temperature is 0.7, 3.6 and 4.4°C, respectively.
{"title":"Effects of composite coatings on pool boiling performance characteristics in demineralized water","authors":"Nitish Kumar, Pradyumna Ghosh, P. Shukla, Roopchand Tandon","doi":"10.1177/09544089241230880","DOIUrl":"https://doi.org/10.1177/09544089241230880","url":null,"abstract":"Nucleate boiling is known for its high heat transfer capacity which occurs at a reasonably low temperature difference between the surface and saturated liquid due to the rapid vaporization process. The vaporization process and boiling heat transfer (BHT) primarily depend on surface morphology and wettability. In this article, surface morphology and wettability of smooth copper surfaces have been altered by coating with binary oxide nanoparticles. Three different combinations of composite coatings: TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 are considered and pool boiling performances have been investigated in demineralized water. Samples have been prepared using electrophoretic deposition techniques in binary oxide nanofluid of 0.1 wt. % concentration. The coating was performed for a fixed duration of 10 min in a medium of hybrid nanofluids of TiO2/SiO2, TiO2/Al2O3 and SiO2/Al2O3 which are referred to as S1, S2 and S3, respectively, in the text. The surface morphology, wettability and coating layer thickness of the sample are varied with the coating duration. The smooth copper surface is hydrophilic while coated samples are hydrophobic by nature. Experiments were carried out on all surfaces, and the results were compared with the smooth copper surface. The maximum enhancements in BHT coefficient for surfaces S1, S2 and S3 are 38%, 43% and 59%, respectively, corresponding to heat flux of ∼275,∼ 200 and ∼220 kW/m2. The reduction in boiling incipient temperature is 0.7, 3.6 and 4.4°C, respectively.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"58 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844702","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 : 2024-02-12DOI: 10.1177/09544089241228105
Kumar Gaurav, Suresh Kant Verma
Supply of energy against continuous increase in energy demand is a great challenge for the present time. This has compelled the researchers to develop energy-efficient and performance-enhanced devices. Solar energy, being the capable source to supply the clean energy can be harvested with the help of flat plate solar collectors (FPSCs). In order to enhance the thermal performance of FPSC researchers have considered various aspects, for example, design modification, heat transfer fluid having enhanced thermophysical properties, use of nanofluids, reduction in heat loss, use of enhancement devices, use of phase change materials and porous materials. The present article describes in detail these methods and compares the results obtained by the respective researches. Experimental as well as numerical works have also been presented. A comprehensive review for the thermal performance enhancement techniques used in FPSC has been presented. The objective of this review is to provide a valuable framework for evaluating and comparing different techniques for enhancing FPSC performance. The review aims to help identify the most appropriate approach and gaps in current research and proposes potential areas for future enhancements, which is expected to assist researchers.
{"title":"Critical review on thermal performance enhancement techniques for flat plate solar collectors","authors":"Kumar Gaurav, Suresh Kant Verma","doi":"10.1177/09544089241228105","DOIUrl":"https://doi.org/10.1177/09544089241228105","url":null,"abstract":"Supply of energy against continuous increase in energy demand is a great challenge for the present time. This has compelled the researchers to develop energy-efficient and performance-enhanced devices. Solar energy, being the capable source to supply the clean energy can be harvested with the help of flat plate solar collectors (FPSCs). In order to enhance the thermal performance of FPSC researchers have considered various aspects, for example, design modification, heat transfer fluid having enhanced thermophysical properties, use of nanofluids, reduction in heat loss, use of enhancement devices, use of phase change materials and porous materials. The present article describes in detail these methods and compares the results obtained by the respective researches. Experimental as well as numerical works have also been presented. A comprehensive review for the thermal performance enhancement techniques used in FPSC has been presented. The objective of this review is to provide a valuable framework for evaluating and comparing different techniques for enhancing FPSC performance. The review aims to help identify the most appropriate approach and gaps in current research and proposes potential areas for future enhancements, which is expected to assist researchers.","PeriodicalId":506108,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering","volume":"90 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784531","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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