Pub Date : 2022-02-28DOI: 10.7836/kses.2022.42.1.115
Ji-Young Eum, Yongki Kim
The discussion about carbon neutrality has recently spread worldwide in response to the climate crisis. In Korea, the concept of zero-energy buildings is one of the means to reduce carbon emissions in the construction sector. Photovoltaic (PV) power systems are the most commonly installed renewable energy systems in residential buildings. However, the installed PV capacity in apartment houses is limited because of difficulty in securing PV installation area and inability to process the surplus PV power. Battery energy storage systems (BESSs) are emerging as a means for the storage and reuse of surplus PV power. In this study, the energy-saving effect of a residential BESS connected to a rooftop PV system was analyzed for eight households in a multi-family house. The data of the main load power (grid supply) and PV+BESS power from households collected from August to October 2021 were analyzed. During the operation of the BESS, the surplus PV power was stored in the battery, and the PV+BESS power was continuously supplied to the load by discharging the battery regardless of the PV power time. Based on the average representative data for 6 days, the power saving rate was approximately 26.0% for the rooftop PV system and approximately 41.8% for the BESS.
{"title":"Analysis of Energy Saving Effect of Residential BESS Connected to Roof-top PV in a Multi-family House","authors":"Ji-Young Eum, Yongki Kim","doi":"10.7836/kses.2022.42.1.115","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.115","url":null,"abstract":"The discussion about carbon neutrality has recently spread worldwide in response to the climate crisis. In Korea, the concept of zero-energy buildings is one of the means to reduce carbon emissions in the construction sector. Photovoltaic (PV) power systems are the most commonly installed renewable energy systems in residential buildings. However, the installed PV capacity in apartment houses is limited because of difficulty in securing PV installation area and inability to process the surplus PV power. Battery energy storage systems (BESSs) are emerging as a means for the storage and reuse of surplus PV power. In this study, the energy-saving effect of a residential BESS connected to a rooftop PV system was analyzed for eight households in a multi-family house. The data of the main load power (grid supply) and PV+BESS power from households collected from August to October 2021 were analyzed. During the operation of the BESS, the surplus PV power was stored in the battery, and the PV+BESS power was continuously supplied to the load by discharging the battery regardless of the PV power time. Based on the average representative data for 6 days, the power saving rate was approximately 26.0% for the rooftop PV system and approximately 41.8% for the BESS.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129846023","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.155
Ji-Hyoun Lee, Woo-Hyun Kim, Tae-young Kang, Tae-Jun Park
Energy storage system (ESS) is a power storage device to increase power utilization efficiency by storing generated electricity and supplying power, when needed. As the number of ESS explosion accidents has been rapidly increasing over the past two to three years, a failure diagnosis study on ESS fire safety should be preceded for its continuous use. When the ESS is operated at high temperature for a long time, aging is caused owing to deterioration, and hence, stable operation is required. Among the recent 28 fires, 15 of them occurred during charging and resting. Because rapid temperature and humidity changes occur during charging and discharging, it is important to predict the trend of change. This study predicts ESS operation patterns through an artificial intelligence-based prediction algorithm, and also diagnoses ESS failures through a supervised learning-based confusion matrix. When a failure pattern is found in the ESS, a method to reduce damage through air conditioner control is studied.
{"title":"Optimal Operation of Energy Storage Devices based on Artificial Intelligence","authors":"Ji-Hyoun Lee, Woo-Hyun Kim, Tae-young Kang, Tae-Jun Park","doi":"10.7836/kses.2022.42.1.155","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.155","url":null,"abstract":"Energy storage system (ESS) is a power storage device to increase power utilization efficiency by storing generated electricity and supplying power, when needed. As the number of ESS explosion accidents has been rapidly increasing over the past two to three years, a failure diagnosis study on ESS fire safety should be preceded for its continuous use. When the ESS is operated at high temperature for a long time, aging is caused owing to deterioration, and hence, stable operation is required. Among the recent 28 fires, 15 of them occurred during charging and resting. Because rapid temperature and humidity changes occur during charging and discharging, it is important to predict the trend of change. This study predicts ESS operation patterns through an artificial intelligence-based prediction algorithm, and also diagnoses ESS failures through a supervised learning-based confusion matrix. When a failure pattern is found in the ESS, a method to reduce damage through air conditioner control is studied.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123654677","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.047
Kyung-joo Cho, Dong-woo Cho
Solar power systems are the most commonly used renewable energy systems for energy self-sufficiency in buildings. In particular, bifacial photovoltaic modules for solar power generation have been researched for their optimal application, as they can generate electricity from two sides using only a single frame. In addition, because the price of a bifacial photovoltaic module is approximately 20% higher than that of a single-sided module, installing bifacial photovoltaic modules in suitable locations on buildings can be economical. To date, most studies have primarily focused on how to increase the amount of power generation from rear cells by arranging materials with high reflectivity on the floors of buildings. In point of fact, when bifacial photovoltaic modules are arranged in an east-west orientation, the maximum amount of power can be obtained in the mornings and afternoons. However, when these modules are installed in buildings in this orientation, a shadow is produced on the building surface according to the trajectory of the sun. In addition, when photovoltaic modules are used in the building envelope, the amount of power generation is often reduced because of this shadow. Nevertheless, even when considering this reduction in power generation, if the total power generation is higher than when photovoltaic modules are installed only vertically, the self-sufficiency rates of buildings can be improved. In this study, the shadow of a bifacial photovoltaic module was simulated using vertical photovoltaic modules to consider the possibilities of architectural application of bifacial photovoltaic modules.
{"title":"Experimental Analysis on Annual Power Generations of Louver-integrated Bi-facial Photovoltaic Modules for Architectural Applications","authors":"Kyung-joo Cho, Dong-woo Cho","doi":"10.7836/kses.2022.42.1.047","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.047","url":null,"abstract":"Solar power systems are the most commonly used renewable energy systems for energy self-sufficiency in buildings. In particular, bifacial photovoltaic modules for solar power generation have been researched for their optimal application, as they can generate electricity from two sides using only a single frame. In addition, because the price of a bifacial photovoltaic module is approximately 20% higher than that of a single-sided module, installing bifacial photovoltaic modules in suitable locations on buildings can be economical. To date, most studies have primarily focused on how to increase the amount of power generation from rear cells by arranging materials with high reflectivity on the floors of buildings. In point of fact, when bifacial photovoltaic modules are arranged in an east-west orientation, the maximum amount of power can be obtained in the mornings and afternoons. However, when these modules are installed in buildings in this orientation, a shadow is produced on the building surface according to the trajectory of the sun. In addition, when photovoltaic modules are used in the building envelope, the amount of power generation is often reduced because of this shadow. Nevertheless, even when considering this reduction in power generation, if the total power generation is higher than when photovoltaic modules are installed only vertically, the self-sufficiency rates of buildings can be improved. In this study, the shadow of a bifacial photovoltaic module was simulated using vertical photovoltaic modules to consider the possibilities of architectural application of bifacial photovoltaic modules.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124215381","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.141
Yu-jin Lee, HunSeung Noh, D. Shin
Because photovoltaic technology applied to the building is intended for long-term use, it is important to undergoes sufficient test before installation. In general, testing of photovoltaic technology is mainly performed on the components of the system. However, because each component is combined with the building’s applied solar technology, various tests are required in its combined state with the building. Therefore, in this study, the current status of photovoltaic technology, procedures, and related facilities were investigated to derive the requirements of the building application test for photovoltaic technology. Based on the results of the investigation, test requirements were derived, such as content to be considered when testing building-applied photovoltaic technology and facility requirements for testing and certification.
{"title":"A Study on Requirements for Building Application Test of Photovoltaic Technology","authors":"Yu-jin Lee, HunSeung Noh, D. Shin","doi":"10.7836/kses.2022.42.1.141","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.141","url":null,"abstract":"Because photovoltaic technology applied to the building is intended for long-term use, it is important to undergoes sufficient test before installation. In general, testing of photovoltaic technology is mainly performed on the components of the system. However, because each component is combined with the building’s applied solar technology, various tests are required in its combined state with the building. Therefore, in this study, the current status of photovoltaic technology, procedures, and related facilities were investigated to derive the requirements of the building application test for photovoltaic technology. Based on the results of the investigation, test requirements were derived, such as content to be considered when testing building-applied photovoltaic technology and facility requirements for testing and certification.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124655404","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.103
Imgyu Kim, Hyuncheol Kim, S. Shin
Energy consumption feedback with an appliance-level feedback system can reduce consumption by a maximum of 12%. In this study, we proposed a data acquisition and training framework for configuring deep learning based on Non-Intrusive Load Monitoring (NILM) for a personalized and appliance-level energy consumption feedback system. To construct a training dataset, an aggregation of active power data from four types of home appliances (refrigerator, induction, TV, washing machine) was performed for approximately three weeks. LSTNet was applied to extract and recognize the features of active power data and the state of each home appliance. With an accuracy metric of more than 90% of the disaggregation result, the applicability of the appliance-level active power feedback system was verified.
{"title":"Deep Learning Based Active Power Disaggregation of Appliances for Personalized Energy Feedback System","authors":"Imgyu Kim, Hyuncheol Kim, S. Shin","doi":"10.7836/kses.2022.42.1.103","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.103","url":null,"abstract":"Energy consumption feedback with an appliance-level feedback system can reduce consumption by a maximum of 12%. In this study, we proposed a data acquisition and training framework for configuring deep learning based on Non-Intrusive Load Monitoring (NILM) for a personalized and appliance-level energy consumption feedback system. To construct a training dataset, an aggregation of active power data from four types of home appliances (refrigerator, induction, TV, washing machine) was performed for approximately three weeks. LSTNet was applied to extract and recognize the features of active power data and the state of each home appliance. With an accuracy metric of more than 90% of the disaggregation result, the applicability of the appliance-level active power feedback system was verified.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127614880","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.077
Seung-Rim Lee, SugnWon Cho, Ji-Ho Yoo, G. Cho
In this study, the effect of flush-out temperature on indoor pollutant reduction was studied in a thermal environment chamber, whose design resembles that of a residential building. The results of this study and those of previous studies were compared. The measurement was carried out at 11°C and 16°C following a 6-day flush-out at. Consequently, the pollutants decreased by compared to 56% ~ 78% in previous studies. The flush-out had a reduction effect on the pollutants even at low temperatures. When compared with field measurement results, the effect of the pollutants reduced by flush-out temperature was different; however, it was confirmed that the flush-out has some effect of reducing pollutants even at low temperatures. By comparing the current results with those of field and chamber experiments conducted in previous studies with a t-test, the p-value was 0.05 or higher, indicating that the number of temperature-induced ventilations in the entire dataset was not a significant factor in the pollutant reduction effect. Therefore, based on the t-test analysis results of pollutant reduction effect by temperature, it was confirmed that the higher the temperature, the greater the pollutant reduction effect, 13% to 80%. The difference in the reduction effect by temperature varied for each pollutant.
{"title":"Effects of Flush-out Air Temperature on Reducing Indoor Air Pollutants in Newly Built Residential Buildings","authors":"Seung-Rim Lee, SugnWon Cho, Ji-Ho Yoo, G. Cho","doi":"10.7836/kses.2022.42.1.077","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.077","url":null,"abstract":"In this study, the effect of flush-out temperature on indoor pollutant reduction was studied in a thermal environment chamber, whose design resembles that of a residential building. The results of this study and those of previous studies were compared. The measurement was carried out at 11°C and 16°C following a 6-day flush-out at. Consequently, the pollutants decreased by compared to 56% ~ 78% in previous studies. The flush-out had a reduction effect on the pollutants even at low temperatures. When compared with field measurement results, the effect of the pollutants reduced by flush-out temperature was different; however, it was confirmed that the flush-out has some effect of reducing pollutants even at low temperatures. By comparing the current results with those of field and chamber experiments conducted in previous studies with a t-test, the p-value was 0.05 or higher, indicating that the number of temperature-induced ventilations in the entire dataset was not a significant factor in the pollutant reduction effect. Therefore, based on the t-test analysis results of pollutant reduction effect by temperature, it was confirmed that the higher the temperature, the greater the pollutant reduction effect, 13% to 80%. The difference in the reduction effect by temperature varied for each pollutant.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130537331","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.013
Su-Jin Hwang, Jin-Young Kim, Hyun-Goo Kim
In order to realize carbon neutrality, Korean Government is promoting the development of renewable energy with a focus on solar power and wind power. However, the development of wind power is delayed compared to that of solar power for which the achievements have exceeded the targets. When it comes to onshore wind power, development has been delayed due to siting problems. In this study, in order to derive key regulations affecting the siting of onshore wind power, sensitivity analysis was conducted for 58 siting factors. The database consisted of 33 environmental and forest regulations from onshore wind energy siting atlas, roads, railways, buildings, tidal flats, civilian control zones, special-purpose areas, special purpose districts, development restriction zones and cultural heritage protection zones. By dividing the results by administrative districts, key regulations for onshore wind power in each region was derived.
{"title":"Key Regulatory Impact Analysis on Onshore Wind Power based on Sensitivity Analysis","authors":"Su-Jin Hwang, Jin-Young Kim, Hyun-Goo Kim","doi":"10.7836/kses.2022.42.1.013","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.013","url":null,"abstract":"In order to realize carbon neutrality, Korean Government is promoting the development of renewable energy with a focus on solar power and wind power. However, the development of wind power is delayed compared to that of solar power for which the achievements have exceeded the targets. When it comes to onshore wind power, development has been delayed due to siting problems. In this study, in order to derive key regulations affecting the siting of onshore wind power, sensitivity analysis was conducted for 58 siting factors. The database consisted of 33 environmental and forest regulations from onshore wind energy siting atlas, roads, railways, buildings, tidal flats, civilian control zones, special-purpose areas, special purpose districts, development restriction zones and cultural heritage protection zones. By dividing the results by administrative districts, key regulations for onshore wind power in each region was derived.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128286224","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.127
mun Gu Seo, Hyomun Lee, Jongho Yoon, Dongsu Kim
The government and private sectors in Korea have actively conducted the studies associated with high energy-efficient buildings to enable the zero-energy building (ZEB) targets. Establishing a reference baseline condition is essential to achieve the targets effectively. This study explores electrical energy consumption of residential building types under the city-level condition to identify baseline energy patterns and set up the benchmark dataset. An open-source dataset is used, which is provided by the public housing management information system (i.e., the K-apt website) of the government management office. For this study, five (5) years of electricity usage are reflected for the data-mining process (e.g., removing noise data) and its statistical analysis. This study considers four representative cities for the energy benchmarking analysis, including Seoul, Busan, Gwangju, and Daejeon. Results indicated that the energy distribution patterns of the residential buildings were varied according to the regions, analysis years, and other combined effects such as the range of dataset in the processing. This study concludes that the benchmark dataset will be useful and informative to determine the relative system capacity potential under monthly and yearly trends in the representative locations in Korea.
{"title":"Investigation on Electric Energy Consumption Patterns of Residential Buildings in Four Cities through the Data Mining","authors":"mun Gu Seo, Hyomun Lee, Jongho Yoon, Dongsu Kim","doi":"10.7836/kses.2022.42.1.127","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.127","url":null,"abstract":"The government and private sectors in Korea have actively conducted the studies associated with high energy-efficient buildings to enable the zero-energy building (ZEB) targets. Establishing a reference baseline condition is essential to achieve the targets effectively. This study explores electrical energy consumption of residential building types under the city-level condition to identify baseline energy patterns and set up the benchmark dataset. An open-source dataset is used, which is provided by the public housing management information system (i.e., the K-apt website) of the government management office. For this study, five (5) years of electricity usage are reflected for the data-mining process (e.g., removing noise data) and its statistical analysis. This study considers four representative cities for the energy benchmarking analysis, including Seoul, Busan, Gwangju, and Daejeon. Results indicated that the energy distribution patterns of the residential buildings were varied according to the regions, analysis years, and other combined effects such as the range of dataset in the processing. This study concludes that the benchmark dataset will be useful and informative to determine the relative system capacity potential under monthly and yearly trends in the representative locations in Korea.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"32 45","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120967743","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.087
Seong-Geun Kim, Junyeop Kim, Byunghwa An, Youngbok Kim, C. Son, J. Yoon, Kwang-Bae Choi
Air-type photovoltaic and thermal (PV/T) has a lower thermal capacity than liquid-type one; therefore, studies are being conducted turbulence promoters to improve heat transfer in a duct. This study aims to evaluate heat transfer performance and pressure drop while changing the increasing and decreasing ratio of turbulence promoters by using computational fluid dynamics (CFD). The increasing and decreasing ratio is a concept focused on increasing the height of turbulence promoters n times from the first row to the last row to generate high air temperatures at the outlet side. As a result, the difference in heat transfer performance according to the increasing and decreasing ratio was minimal; however, it was confirmed that the pressure drop increased in the order of 1.3, 1.2, and 1.1, because the increased resistance to air flow due to increased installation height of the turbulent promoters. Accordingly, it was found that the thermohydraulic performance parameter (THPP) increased in the order of 1.1, 1.2, and 1.3. Because of the changes for various shape conditions were not taken into account, additional consideration is required to select suitable conditions.
{"title":"Heat Transfer Performance and Pressure Drop Analysis According to Shape Conditions of Turbulent Promoters and Flow Conditions in Air-Type PV/T Collectors","authors":"Seong-Geun Kim, Junyeop Kim, Byunghwa An, Youngbok Kim, C. Son, J. Yoon, Kwang-Bae Choi","doi":"10.7836/kses.2022.42.1.087","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.087","url":null,"abstract":"Air-type photovoltaic and thermal (PV/T) has a lower thermal capacity than liquid-type one; therefore, studies are being conducted turbulence promoters to improve heat transfer in a duct. This study aims to evaluate heat transfer performance and pressure drop while changing the increasing and decreasing ratio of turbulence promoters by using computational fluid dynamics (CFD). The increasing and decreasing ratio is a concept focused on increasing the height of turbulence promoters n times from the first row to the last row to generate high air temperatures at the outlet side. As a result, the difference in heat transfer performance according to the increasing and decreasing ratio was minimal; however, it was confirmed that the pressure drop increased in the order of 1.3, 1.2, and 1.1, because the increased resistance to air flow due to increased installation height of the turbulent promoters. Accordingly, it was found that the thermohydraulic performance parameter (THPP) increased in the order of 1.1, 1.2, and 1.3. Because of the changes for various shape conditions were not taken into account, additional consideration is required to select suitable conditions.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116724842","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 : 2022-02-28DOI: 10.7836/kses.2022.42.1.001
K. Seo, Jun-Kyu Lee, Y. Ahn, Gi-Hwan Kang, H. Chang, Jinseok Lee
In this study, the optimized process conditions of a scraper, which is a device used to separate glass from a solar module, are presented for structural analysis, and the actual module separation is confirmed experimentally. Because a strong load is concentrated on the scraper blade, it is necessary to derive the optimal process conditions for effective module separation while minimizing the damage to the blade. Structural analysis was performed using a finite element model (FEM) to evaluate the stress, reaction force, and strain applied to the blade recycling the waste solar modules. The optimal process conditions were determined from the structural analysis according to the angle and surface temperature of the blade. Module separation experiments were conducted by applying the elicited process conditions, and the results showed smooth module separation that enabled the recovery of high-purity tempered glass.
{"title":"Structural Analysis for Physical Separation of End-of-life Photovoltaic Module","authors":"K. Seo, Jun-Kyu Lee, Y. Ahn, Gi-Hwan Kang, H. Chang, Jinseok Lee","doi":"10.7836/kses.2022.42.1.001","DOIUrl":"https://doi.org/10.7836/kses.2022.42.1.001","url":null,"abstract":"In this study, the optimized process conditions of a scraper, which is a device used to separate glass from a solar module, are presented for structural analysis, and the actual module separation is confirmed experimentally. Because a strong load is concentrated on the scraper blade, it is necessary to derive the optimal process conditions for effective module separation while minimizing the damage to the blade. Structural analysis was performed using a finite element model (FEM) to evaluate the stress, reaction force, and strain applied to the blade recycling the waste solar modules. The optimal process conditions were determined from the structural analysis according to the angle and surface temperature of the blade. Module separation experiments were conducted by applying the elicited process conditions, and the results showed smooth module separation that enabled the recovery of high-purity tempered glass.","PeriodicalId":276437,"journal":{"name":"Journal of the Korean Solar Energy Society","volume":"496 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116543996","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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