Pub Date : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525678
N. Batapola, N. Dushyantha, N. Ratnayake, R. Premasiri, B. Abeysinghe, O. Dissanayake, S. Rohitha, Saman Ilankoon, P. Dharmaratne
In the recent few years, rare earth elements (REEs) were considered as critical metals with strategic importance due to their high usage in modern technology and green energy applications. Currently, with the unexpected increase of rare earth element (REE) demand and China's market dominance, many REE processing projects are being launched or revived. In this regard, the present work is focused on assessing the REE potential in the beach placers along the southwest coastline in Sri Lanka. The collected 36 beach sand samples from the mean sea-level in the southwest coast during both southwestern and northeastern monsoons were subjected to both elemental and mineralogical analyses. Based on the findings, Galle, Ginthota, Wadduwa, and Thelwatta areas were found with significant contents of REEs ranging from 32.8-1,359.1 mg/kg. Moreover, the results suggest that REE-bearing heavy minerals are heavily concentrated in the beach face due to stronger oceanic currents generated by the strong winds of the southwestern monsoon along with the increased sediment supply by inland rivers. The findings in this study would provide insights for future REE prospecting studies, which is helpful in unraveling the hidden potential of REE resources in Sri Lankan beach placer deposits.
{"title":"Rare earth element potential in the beach placers along the southwest coast of Sri Lanka","authors":"N. Batapola, N. Dushyantha, N. Ratnayake, R. Premasiri, B. Abeysinghe, O. Dissanayake, S. Rohitha, Saman Ilankoon, P. Dharmaratne","doi":"10.1109/MERCon52712.2021.9525678","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525678","url":null,"abstract":"In the recent few years, rare earth elements (REEs) were considered as critical metals with strategic importance due to their high usage in modern technology and green energy applications. Currently, with the unexpected increase of rare earth element (REE) demand and China's market dominance, many REE processing projects are being launched or revived. In this regard, the present work is focused on assessing the REE potential in the beach placers along the southwest coastline in Sri Lanka. The collected 36 beach sand samples from the mean sea-level in the southwest coast during both southwestern and northeastern monsoons were subjected to both elemental and mineralogical analyses. Based on the findings, Galle, Ginthota, Wadduwa, and Thelwatta areas were found with significant contents of REEs ranging from 32.8-1,359.1 mg/kg. Moreover, the results suggest that REE-bearing heavy minerals are heavily concentrated in the beach face due to stronger oceanic currents generated by the strong winds of the southwestern monsoon along with the increased sediment supply by inland rivers. The findings in this study would provide insights for future REE prospecting studies, which is helpful in unraveling the hidden potential of REE resources in Sri Lankan beach placer deposits.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"74 1","pages":"415-420"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81624793","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525760
Indisa Herath, S. Karunaratne, Dilshi Dharmarathna
Clay bricks are one of the most commonly used walling materials in Sri Lanka. The brick manufacturing process poses a notable impact on the environment. Clay excavation leads to resource depletion while diesel fuel utilized for excavation and clay transportation pollutes the air. Additionally, tree cutting for wood fuel contributes to deforestation whilst wood burning promotes air pollution. Thus, this research aimed to quantify the global warming potential due to English brick manufacturing using cradle to gate Life Cycle Assessment (LCA) approach. The functional unit used was one-meter square of the brick wall area. Data collection, analysis and interpretation of results were done by the ISO 14044/14040 standards. Primary life cycle inventory data was gathered via brick kiln owners and workers. The LCA assembly was modelled using the ‘OpenLCA’ software. Three product systems were defined according to the brick bond types and wall thicknesses. The global warming potential related to brick production was assessed using the ‘GWP 100a’ method. Clay excavation, clay transportation and wood chamber firing emerged as emission hotspots. The study revealed that the global warming potential of 225mm brick wall and 115mm brick wall as 11.9 and 5.9 kg CO2-eq/m2, respectively. Through this study, local clay brick industry can be driven to improve the overall sustainability of the brick manufacturing sector.
粘土砖是斯里兰卡最常用的墙体材料之一。砖的制造过程对环境造成了显著的影响。粘土开挖导致资源枯竭，而开挖和运输过程中使用的柴油污染空气。此外，砍伐树木以获取木材燃料会导致森林砍伐，而燃烧木材则会加剧空气污染。因此，本研究旨在利用从摇篮到闸门的生命周期评估(LCA)方法来量化英国制砖造成的全球变暖潜势。使用的功能单元为砖墙面积的1平方米。数据收集、分析和结果解释按ISO 14044/14040标准完成。主要的生命周期库存数据是通过砖窑业主和工人收集的。使用“OpenLCA”软件对LCA装配进行建模。根据砖的粘结类型和壁厚定义了三种产品体系。使用“GWP 100a”方法评估了与砖生产相关的全球变暖潜势。粘土挖掘、粘土运输和木室烧制成为排放热点。研究表明，225mm砖墙和115mm砖墙的全球变暖潜势分别为11.9和5.9 kg CO2-eq/m2。通过本研究，可以推动当地粘土砖行业提高砖制造业的整体可持续性。
{"title":"Global warming potential of English brick manufacturing in Sri Lanka: A cradle to gate analysis","authors":"Indisa Herath, S. Karunaratne, Dilshi Dharmarathna","doi":"10.1109/MERCon52712.2021.9525760","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525760","url":null,"abstract":"Clay bricks are one of the most commonly used walling materials in Sri Lanka. The brick manufacturing process poses a notable impact on the environment. Clay excavation leads to resource depletion while diesel fuel utilized for excavation and clay transportation pollutes the air. Additionally, tree cutting for wood fuel contributes to deforestation whilst wood burning promotes air pollution. Thus, this research aimed to quantify the global warming potential due to English brick manufacturing using cradle to gate Life Cycle Assessment (LCA) approach. The functional unit used was one-meter square of the brick wall area. Data collection, analysis and interpretation of results were done by the ISO 14044/14040 standards. Primary life cycle inventory data was gathered via brick kiln owners and workers. The LCA assembly was modelled using the ‘OpenLCA’ software. Three product systems were defined according to the brick bond types and wall thicknesses. The global warming potential related to brick production was assessed using the ‘GWP 100a’ method. Clay excavation, clay transportation and wood chamber firing emerged as emission hotspots. The study revealed that the global warming potential of 225mm brick wall and 115mm brick wall as 11.9 and 5.9 kg CO2-eq/m2, respectively. Through this study, local clay brick industry can be driven to improve the overall sustainability of the brick manufacturing sector.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"26 1","pages":"251-256"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82864326","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525799
A. Fernando, W. Pabasara, K.Y. Gayashini, D. Liyanage
Rice straw is the one of highest plant-based waste generated in Sri Lanka. Farmers burn rice straw without taking any advantage making substantial air pollution. It is found that rice straw ash contains a significant amount (62%-82%) of silica which is a prominent reinforcing filler material in rubber compounding. The present research work focuses on incorporation of rice straw ash as an alternative filler material in rubber compounding. Up to date, different ratios of rice straw ash has been incorporated with selected rubber compound replacing the silica filler loading and tensile, tear strength, hardness, compression set properties have been investigated. These properties were compared with those of the reference sample prepared according to the same formulation but without adding rice straw ash. The sample containing the same proportion of rice straw ash and silica showed the highest tensile strength compared with that of the control sample. Further, tensile strength of the sample which contained only rice straw ash was also higher than that of the control sample. The rice straw ash has a strong ability to improve the tensile properties of the rubber vulcanizates, while it negatively affects the other mechanical properties such as hardness, tear strength and compression set.
{"title":"Investigation of Mechanical Properties of Rice Straw Ash-filled Natural Rubber Compounds","authors":"A. Fernando, W. Pabasara, K.Y. Gayashini, D. Liyanage","doi":"10.1109/MERCon52712.2021.9525799","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525799","url":null,"abstract":"Rice straw is the one of highest plant-based waste generated in Sri Lanka. Farmers burn rice straw without taking any advantage making substantial air pollution. It is found that rice straw ash contains a significant amount (62%-82%) of silica which is a prominent reinforcing filler material in rubber compounding. The present research work focuses on incorporation of rice straw ash as an alternative filler material in rubber compounding. Up to date, different ratios of rice straw ash has been incorporated with selected rubber compound replacing the silica filler loading and tensile, tear strength, hardness, compression set properties have been investigated. These properties were compared with those of the reference sample prepared according to the same formulation but without adding rice straw ash. The sample containing the same proportion of rice straw ash and silica showed the highest tensile strength compared with that of the control sample. Further, tensile strength of the sample which contained only rice straw ash was also higher than that of the control sample. The rice straw ash has a strong ability to improve the tensile properties of the rubber vulcanizates, while it negatively affects the other mechanical properties such as hardness, tear strength and compression set.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"15 1","pages":"43-47"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86531811","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525745
K. Alahapperuma
Nowadays, polymers as a group of materials have occupied in major areas of human lives. Natural rubber (NR) is a substitute for synthetic rubbers in majority of applications, and higher prices of petroleum-based products have resulted in higher cost involvements in NR rubber compounds. This has resulted in partial replacement of higher grade Ribbed Smoked Sheet (RSS) NR with lower grade scrap rubber in most of the rubber products, especially retreading tire compounds. In preparation of rubber mixes, usual practice is to mix both types of rubber together and added with carbon black, oil and other ingredients subsequently, according to an order. Aim of this study was to get optimum technical properties of a selected retreading tire compound of (80%) RSS and (20%) scrap rubber with the use of master batch preparations; i.e. the amount of carbon black was added separately into two types of blended rubber and mixed separately. The master batch mix design with 80% carbon black incorporated into RSS and 20% carbon black incorporated into scrap rubber showed a better balance of technical properties than the properties obtained with other master batch mix designs and also the normal mix design.
{"title":"Optimize Technical Properties with Master Batch Blends in RSS/Scrap Rubber Tire Retread Compounds","authors":"K. Alahapperuma","doi":"10.1109/MERCon52712.2021.9525745","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525745","url":null,"abstract":"Nowadays, polymers as a group of materials have occupied in major areas of human lives. Natural rubber (NR) is a substitute for synthetic rubbers in majority of applications, and higher prices of petroleum-based products have resulted in higher cost involvements in NR rubber compounds. This has resulted in partial replacement of higher grade Ribbed Smoked Sheet (RSS) NR with lower grade scrap rubber in most of the rubber products, especially retreading tire compounds. In preparation of rubber mixes, usual practice is to mix both types of rubber together and added with carbon black, oil and other ingredients subsequently, according to an order. Aim of this study was to get optimum technical properties of a selected retreading tire compound of (80%) RSS and (20%) scrap rubber with the use of master batch preparations; i.e. the amount of carbon black was added separately into two types of blended rubber and mixed separately. The master batch mix design with 80% carbon black incorporated into RSS and 20% carbon black incorporated into scrap rubber showed a better balance of technical properties than the properties obtained with other master batch mix designs and also the normal mix design.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"45 1","pages":"549-554"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89581872","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525774
J. Jayaweera, M. Narayana, S. Adikary
Drying process of green ceramic bodies are complicated due to simultaneous and coupled heat and mass transfers. Dimensional variations and mechanical stresses occur within the ceramic body during drying may create defects in the final product if drying conditions are not carefully controlled. In this study, the drying behavior of Sri Lankan Kaolin was investigated. Initially, Kaolin was characterized using wet chemical analysis and X-ray diffraction to investigate structure and composition. Two batches of Kaolin with different particle size distributions were prepared using wet ball mill grinding with average particles size (D50) of $4.07 mumathrm{m}$ and $3.57 mumathrm{m}$ respectively. Green ceramic samples were obtained using extrusion process. Samples were dried in oven at 60°C and moisture variation of the green product was measured with time. Critical moisture content of the Sri Lankan Kaolin was 1.50%. Mathematical relationship was formulated to determine drying behavior of Sri Lankan Kaolin. An unsteady three-dimensional (3D) model was developed and simulated in Computational Fluid Dynamics (CFD) framework. Simulation results developed by the model were compared with data obtained by experiments conducted using Sri Lankan Kaolin. The model results were validated and comply with experiments results and R2 value was 0.9.
绿色陶瓷体的干燥过程由于传热传质同时发生和耦合而变得复杂。如果干燥条件控制不当，在干燥过程中陶瓷体内发生的尺寸变化和机械应力可能会在最终产品中产生缺陷。本文对斯里兰卡高岭土的干燥特性进行了研究。首先，利用湿化学分析和x射线衍射来研究高岭土的结构和组成。采用湿法球磨法制备了两批不同粒径分布的高岭土，平均粒径(D50)分别为$4.07 mu mathm {m}$和$3.57 mu mathm {m}$。采用挤压法制备了绿色陶瓷样品。样品在60°C的烘箱中干燥，并测量绿色产品的水分随时间的变化。斯里兰卡高岭土的临界含水率为1.50%。建立了确定斯里兰卡高岭土干燥性能的数学关系。在计算流体力学(CFD)框架下建立了非定常三维(3D)模型并进行了仿真。将模型模拟结果与斯里兰卡高岭土试验数据进行了比较。模型结果经过验证，符合实验结果，R2值为0.9。
{"title":"Numerical Modeling of Drying Behavior of Sri Lankan Kaolin","authors":"J. Jayaweera, M. Narayana, S. Adikary","doi":"10.1109/MERCon52712.2021.9525774","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525774","url":null,"abstract":"Drying process of green ceramic bodies are complicated due to simultaneous and coupled heat and mass transfers. Dimensional variations and mechanical stresses occur within the ceramic body during drying may create defects in the final product if drying conditions are not carefully controlled. In this study, the drying behavior of Sri Lankan Kaolin was investigated. Initially, Kaolin was characterized using wet chemical analysis and X-ray diffraction to investigate structure and composition. Two batches of Kaolin with different particle size distributions were prepared using wet ball mill grinding with average particles size (D50) of $4.07 mumathrm{m}$ and $3.57 mumathrm{m}$ respectively. Green ceramic samples were obtained using extrusion process. Samples were dried in oven at 60°C and moisture variation of the green product was measured with time. Critical moisture content of the Sri Lankan Kaolin was 1.50%. Mathematical relationship was formulated to determine drying behavior of Sri Lankan Kaolin. An unsteady three-dimensional (3D) model was developed and simulated in Computational Fluid Dynamics (CFD) framework. Simulation results developed by the model were compared with data obtained by experiments conducted using Sri Lankan Kaolin. The model results were validated and comply with experiments results and R2 value was 0.9.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"60 1","pages":"48-53"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88763730","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525676
G. C. S. Jayaweera, H. D. Hidallana-Gamage, W. P. R. Indrajith
Maximum crack width of reinforced concrete (RC) structures should be controlled for satisfying the serviceability and durability requirements of the structures. However, the crack width analysis of RC structures is not much easy because of the complexity of the parameters which affect the crack width. In the Sri Lankan context, there is no specific simplified guidance in terms charts and tables for crack width calculations of circular RC columns. Hence, it is important to develop such guidance. This research deals with the crack width analysis of circular RC columns in straight viaduct sections. A comprehensive study was carried out regarding the behaviour of the cracks in circular RC columns in viaduct sections as per the design standard, BS 5400. Autodesk Structural Bridge Design software was used to perform crack width calculations and MIDAS Civil software was used to do the Finite Element Analysis (FEA) and validation process. The comprehensive design charts developed in this research will be useful in calculating the crack widths in circular RC columns without following any time-consuming methods. Therefore, the findings of this research will be helpful to enhance the efficiency of the design work related to the crack width calculations of circular RC columns.
{"title":"Development of Design Guidance for Circular Reinforced Concrete Columns Incorporating Crack Width","authors":"G. C. S. Jayaweera, H. D. Hidallana-Gamage, W. P. R. Indrajith","doi":"10.1109/MERCon52712.2021.9525676","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525676","url":null,"abstract":"Maximum crack width of reinforced concrete (RC) structures should be controlled for satisfying the serviceability and durability requirements of the structures. However, the crack width analysis of RC structures is not much easy because of the complexity of the parameters which affect the crack width. In the Sri Lankan context, there is no specific simplified guidance in terms charts and tables for crack width calculations of circular RC columns. Hence, it is important to develop such guidance. This research deals with the crack width analysis of circular RC columns in straight viaduct sections. A comprehensive study was carried out regarding the behaviour of the cracks in circular RC columns in viaduct sections as per the design standard, BS 5400. Autodesk Structural Bridge Design software was used to perform crack width calculations and MIDAS Civil software was used to do the Finite Element Analysis (FEA) and validation process. The comprehensive design charts developed in this research will be useful in calculating the crack widths in circular RC columns without following any time-consuming methods. Therefore, the findings of this research will be helpful to enhance the efficiency of the design work related to the crack width calculations of circular RC columns.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"163 1","pages":"148-153"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86422880","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525788
Madushi H Medagedara, Tharushi Shavindya Peiris, N. Wanasekara
Wearable self-health monitoring devices are a contemporary necessity with modern life-style and health implications of this decade. Current devices have transitioned to non-invasive sampling due to benefits including minimal possibility of infections, convenience, no requirement for storage, and physiological safety of neo-natal and geriatric patients. Sweat, in this regard, is of importance as the variations in the sweat composition have been validated as bio markers of different diseases. Corresponding variations in the surface resistivity as the sweat composition is changed, has been introduced in this novel research with a synergistic approach, based on developing a conductive sweat sensing and analyzing textile platform. The relationship between the macro porosity of the proposed textile platform and the measured surface conductivity values has been mathematically modeled and presented in this paper. A simulation of the mathematical model concluded that variations in the localized surface area for sweat accumulation and the fabric weight of the textile platform has minimal effect on the performance of the wearable sweat monitoring platform, while a satisfactorily measurable surface conductivity value can be obtained at sweat concentration levels in the order 0.01M.
{"title":"Modeling Surface Conductivity in a Sweat Analyzing Wearable Smart Textile Platform","authors":"Madushi H Medagedara, Tharushi Shavindya Peiris, N. Wanasekara","doi":"10.1109/MERCon52712.2021.9525788","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525788","url":null,"abstract":"Wearable self-health monitoring devices are a contemporary necessity with modern life-style and health implications of this decade. Current devices have transitioned to non-invasive sampling due to benefits including minimal possibility of infections, convenience, no requirement for storage, and physiological safety of neo-natal and geriatric patients. Sweat, in this regard, is of importance as the variations in the sweat composition have been validated as bio markers of different diseases. Corresponding variations in the surface resistivity as the sweat composition is changed, has been introduced in this novel research with a synergistic approach, based on developing a conductive sweat sensing and analyzing textile platform. The relationship between the macro porosity of the proposed textile platform and the measured surface conductivity values has been mathematically modeled and presented in this paper. A simulation of the mathematical model concluded that variations in the localized surface area for sweat accumulation and the fabric weight of the textile platform has minimal effect on the performance of the wearable sweat monitoring platform, while a satisfactorily measurable surface conductivity value can be obtained at sweat concentration levels in the order 0.01M.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"15 1","pages":"608-613"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81168705","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 : 2021-07-27DOI: 10.1109/mercon52712.2021.9525666
{"title":"Invited Talk: Recent development of a 2D/3D hybrid finite-discrete element simulator for rock fracture process under quasi-static and dynamic loading conditions","authors":"","doi":"10.1109/mercon52712.2021.9525666","DOIUrl":"https://doi.org/10.1109/mercon52712.2021.9525666","url":null,"abstract":"","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"34 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84525345","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 : 2021-07-27DOI: 10.1109/MERCon52712.2021.9525696
V.H.M.S. Babalagama, S. Pathirana
Maximizing day light usage to occupant's comfort level is a modern energy saving technique for most aspect of a sustainable building management system. Due to tropical climate condition in Sri Lanka using a high window to wall ratio is not an effective method of daylight harvesting in modern buildings. This research introduces experiential optimization of daylight usage in an office building tor educe energy in t he occupant's comfort zone. Using the software Design-Builder 4.8 with energy plus to demonstrate the dynamic role of simulation tool in this case study. The selected case is a four-story building of total area of 3441 square meters and external window area of 1053 square meters overall. The longest side of the building oriented to east-west. There is a problem of direct sun light and heat inside the building according to its high window to wall ratio. This research helps to determine the consequence of effect of direct sunlight simulation and total energy to be compared with three stages. Optimize the day light harvesting providing 1.5 meters width sunshades along with providing three types of window films. Best optimization results of 6 7% energy saving f or the sunshade along with reflective tint comparatively a ssume that all the windows closed in basic model.
{"title":"Optimum Utilization of Daylighting in Office Buildings","authors":"V.H.M.S. Babalagama, S. Pathirana","doi":"10.1109/MERCon52712.2021.9525696","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525696","url":null,"abstract":"Maximizing day light usage to occupant's comfort level is a modern energy saving technique for most aspect of a sustainable building management system. Due to tropical climate condition in Sri Lanka using a high window to wall ratio is not an effective method of daylight harvesting in modern buildings. This research introduces experiential optimization of daylight usage in an office building tor educe energy in t he occupant's comfort zone. Using the software Design-Builder 4.8 with energy plus to demonstrate the dynamic role of simulation tool in this case study. The selected case is a four-story building of total area of 3441 square meters and external window area of 1053 square meters overall. The longest side of the building oriented to east-west. There is a problem of direct sun light and heat inside the building according to its high window to wall ratio. This research helps to determine the consequence of effect of direct sunlight simulation and total energy to be compared with three stages. Optimize the day light harvesting providing 1.5 meters width sunshades along with providing three types of window films. Best optimization results of 6 7% energy saving f or the sunshade along with reflective tint comparatively a ssume that all the windows closed in basic model.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"143 1","pages":"235-239"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90701940","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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