Pub Date : 2023-10-31DOI: 10.6110/kjacr.2023.35.10.505
Siwon Yoon, Yong-Hoon Im
This study aimed to investigate the feasibility of employing solar energy for seasonal thermal storage and utilization in horticulture facilities. The implementation of geothermal heat pump systems in large-scale horticulture farms has encountered challenges due to the substantial investment costs and operational stability concerns related to heat source temperatures. To address these limitations, this study proposes the novel concept of seasonal thermal storage and utilization. By incorporating a suitably sized storage tank, the capacity requirements of costly energy generation facilities like heat pumps can be significantly reduced, ensuring more consistent annual operation. Nevertheless, the installation of solar collectors for seasonal thermal storage may present additional challenges due to lack of space to accommodate large collectors, particularly in urban areas where the cost of land is high. This study considered two variations of seasonal thermal storage and utilization models, and conducted a comprehensive analysis of their operational characteristics and energy utilization. Through simulations and comparative analyses using an in-house developed simulation tool, the optimal design variables are determined, and the detailed operational characteristics are evaluated. The findings of this study furnish technical evidence supporting the viability of seasonal thermal storage and utilization, offering substantial benefits that can be applied in horticulture facilities.
{"title":"A Comparative Analysis of Heat Supplying Models with Seasonal Heat Storage for a Greenhouse","authors":"Siwon Yoon, Yong-Hoon Im","doi":"10.6110/kjacr.2023.35.10.505","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.10.505","url":null,"abstract":"This study aimed to investigate the feasibility of employing solar energy for seasonal thermal storage and utilization in horticulture facilities. The implementation of geothermal heat pump systems in large-scale horticulture farms has encountered challenges due to the substantial investment costs and operational stability concerns related to heat source temperatures. To address these limitations, this study proposes the novel concept of seasonal thermal storage and utilization. By incorporating a suitably sized storage tank, the capacity requirements of costly energy generation facilities like heat pumps can be significantly reduced, ensuring more consistent annual operation. Nevertheless, the installation of solar collectors for seasonal thermal storage may present additional challenges due to lack of space to accommodate large collectors, particularly in urban areas where the cost of land is high. This study considered two variations of seasonal thermal storage and utilization models, and conducted a comprehensive analysis of their operational characteristics and energy utilization. Through simulations and comparative analyses using an in-house developed simulation tool, the optimal design variables are determined, and the detailed operational characteristics are evaluated. The findings of this study furnish technical evidence supporting the viability of seasonal thermal storage and utilization, offering substantial benefits that can be applied in horticulture facilities.","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"11 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765840","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 : 2023-10-31DOI: 10.6110/kjacr.2023.35.10.519
Sung-Woo Park, Jee-hoon Yeom, Keon-Woo Lee
To efficiently implement Energy Efficiency Labeling and Standard, the government is expanding and developing high-efficiency devices through periodic raising of the rating index. In this study, the rating share was checked and six items that needed to be adjusted, such as TV, were selected. In addition, for the six items, the raised minimum annual average rating index was derived and the raised maximum rating was proposed by applying it. Further, the rating share and predicted energy savings amount were calculated, and the possibility of conversion to the minimum energy performance standard (MEPS) was suggested.
{"title":"A Study on Energy Efficiency Rating Standard Improvement Through Analysis of the Effect of Rating Index Increase","authors":"Sung-Woo Park, Jee-hoon Yeom, Keon-Woo Lee","doi":"10.6110/kjacr.2023.35.10.519","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.10.519","url":null,"abstract":"To efficiently implement Energy Efficiency Labeling and Standard, the government is expanding and developing high-efficiency devices through periodic raising of the rating index. In this study, the rating share was checked and six items that needed to be adjusted, such as TV, were selected. In addition, for the six items, the raised minimum annual average rating index was derived and the raised maximum rating was proposed by applying it. Further, the rating share and predicted energy savings amount were calculated, and the possibility of conversion to the minimum energy performance standard (MEPS) was suggested.","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"11 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764675","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 : 2023-10-31DOI: 10.6110/kjacr.2023.35.10.487
Ju-Hong Oh, Yeong-Ik Son, Eui-Jong Kim
Model predictive control has the potential to reduce energy consumption during the operational phase of a building by predetermining optimal operating strategies. However, while the predictive performance of the model is important, there is very little data available from actual buildings in operation. Therefore, this study proposes a method to build a physical model that can predict indoor temperature using measured indoor thermal environment data (only partial data, mainly for air conditioning) for an actual operating building. Furthermore, a modeling methodology using TRNSYS components, which can be interlocked on the same platform as the air conditioning system is proposed. By comparing the simulated indoor temperature of the proposed model with the measured values, the prediction accuracy and temperature distribution pattern were improved compared to the original uncalibrated model. This improvement in accuracy was achieved by calibrating the model to the optimal parameters for each season through clustering. In addition, the 7.05% CVRMSE met ASHRAE Guideline 14 criteria, demonstrating its potential for future use in MPC.
{"title":"Development of a Grey-box Based Building Load Model Using TRNSYS Components","authors":"Ju-Hong Oh, Yeong-Ik Son, Eui-Jong Kim","doi":"10.6110/kjacr.2023.35.10.487","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.10.487","url":null,"abstract":"Model predictive control has the potential to reduce energy consumption during the operational phase of a building by predetermining optimal operating strategies. However, while the predictive performance of the model is important, there is very little data available from actual buildings in operation. Therefore, this study proposes a method to build a physical model that can predict indoor temperature using measured indoor thermal environment data (only partial data, mainly for air conditioning) for an actual operating building. Furthermore, a modeling methodology using TRNSYS components, which can be interlocked on the same platform as the air conditioning system is proposed. By comparing the simulated indoor temperature of the proposed model with the measured values, the prediction accuracy and temperature distribution pattern were improved compared to the original uncalibrated model. This improvement in accuracy was achieved by calibrating the model to the optimal parameters for each season through clustering. In addition, the 7.05% CVRMSE met ASHRAE Guideline 14 criteria, demonstrating its potential for future use in MPC.","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"15 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765843","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 : 2023-10-31DOI: 10.6110/kjacr.2023.35.10.497
Yeonju Kang, Hobyung Chae, Sangmu Bae, Kwonye Kim, Yujin Nam
In this study, the performance of two renewable energy systems, ground source heat pump (GSHP) system and air source heat pump (ASHP) system, was analyzed through dynamic energy simulation, and carbon emissions were quantitatively calculated through a life cycle assessment method based on the simulation results. The carbon emissions of the energy systems were calculated by dividing the life cycle evaluation stage into four categories: production, construction, operation, and disposal, and the calculation of carbon emissions in the operation stage was based on the annual performance analysis of the dynamic energy simulation. For 1 year of operation, the GSHP system had 14% higher carbon emissions than the ASHP system, while for 20 years of operation, the ASHP system had 39% higher carbon emissions than the GSHP. Compared to the ASHP system, the GSHP system can reduce carbon emissions in the operating stage by 42% per year by securing higher COP, and within 2 years, the carbon amount in the entire process can be lower than in the ASHP system.
{"title":"Analysis of Carbon Emissions of Ground and Air Source Cooling and Heating Systems Based on Dynamic Energy Simulation","authors":"Yeonju Kang, Hobyung Chae, Sangmu Bae, Kwonye Kim, Yujin Nam","doi":"10.6110/kjacr.2023.35.10.497","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.10.497","url":null,"abstract":"In this study, the performance of two renewable energy systems, ground source heat pump (GSHP) system and air source heat pump (ASHP) system, was analyzed through dynamic energy simulation, and carbon emissions were quantitatively calculated through a life cycle assessment method based on the simulation results. The carbon emissions of the energy systems were calculated by dividing the life cycle evaluation stage into four categories: production, construction, operation, and disposal, and the calculation of carbon emissions in the operation stage was based on the annual performance analysis of the dynamic energy simulation. For 1 year of operation, the GSHP system had 14% higher carbon emissions than the ASHP system, while for 20 years of operation, the ASHP system had 39% higher carbon emissions than the GSHP. Compared to the ASHP system, the GSHP system can reduce carbon emissions in the operating stage by 42% per year by securing higher COP, and within 2 years, the carbon amount in the entire process can be lower than in the ASHP system.","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"11 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765838","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 : 2023-10-31DOI: 10.6110/kjacr.2023.35.10.479
Seungmin Jang, BeopGyu Lim, Jinkyun Cho
This case study analyzed the field evaluation of cross-infection and infection risk using the tracer gas method in mobile infectious disease isolation facilities, focusing on the concept of indoor air dilution through a three-step protocol. Protocol A determines the release concentration of the tracer gas to be used in the experiment, Protocol B presents a method for measuring cross-infection in a single room, and Protocol C involves a statistical analysis of measurement uncertainties to enhance accuracy and reliability. Based on the presented field evaluation, it is possible to assess the infection risk in an indoor air environment of existing or new medical facilities in practical operation. Therefore, it is considered a valuable operational guideline and verification method to minimize cross-infection, implement an effective air conditioning system, and safeguard healthcare workers
{"title":"A Case Study of On-site Infection Risk Assessment in a Healthcare Facility Using Tracer Gas Method","authors":"Seungmin Jang, BeopGyu Lim, Jinkyun Cho","doi":"10.6110/kjacr.2023.35.10.479","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.10.479","url":null,"abstract":"This case study analyzed the field evaluation of cross-infection and infection risk using the tracer gas method in mobile infectious disease isolation facilities, focusing on the concept of indoor air dilution through a three-step protocol. Protocol A determines the release concentration of the tracer gas to be used in the experiment, Protocol B presents a method for measuring cross-infection in a single room, and Protocol C involves a statistical analysis of measurement uncertainties to enhance accuracy and reliability. Based on the presented field evaluation, it is possible to assess the infection risk in an indoor air environment of existing or new medical facilities in practical operation. Therefore, it is considered a valuable operational guideline and verification method to minimize cross-infection, implement an effective air conditioning system, and safeguard healthcare workers","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"11 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765841","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 : 2023-09-30DOI: 10.6110/kjacr.2023.35.9.451
Seungmin Jang, Ahmin Jang, Sung-Lok Do, Jinkyun Cho, Chul Kim
{"title":"Analysis of Prior Research to Establish a Technology Roadmap of Active Systems for Zero Energy Building/House (ZEB/H): The Last Decade of International Research","authors":"Seungmin Jang, Ahmin Jang, Sung-Lok Do, Jinkyun Cho, Chul Kim","doi":"10.6110/kjacr.2023.35.9.451","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.9.451","url":null,"abstract":"","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"239 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73710440","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 : 2023-09-30DOI: 10.6110/kjacr.2023.35.9.468
Beungyong Park, Jongyeon Lim, Jinho Kim, Soyeon Kim, Yo-Sun Yun
{"title":"Improvement of Green Standard for Energy and Environment Design Criteria With Commissioning","authors":"Beungyong Park, Jongyeon Lim, Jinho Kim, Soyeon Kim, Yo-Sun Yun","doi":"10.6110/kjacr.2023.35.9.468","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.9.468","url":null,"abstract":"","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75807610","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 : 2023-09-30DOI: 10.6110/kjacr.2023.35.9.434
Yong-Il Kwon
{"title":"A Study on Flow Interference between Total Heat Recovery System and Kitchen Range Hood in Apartment","authors":"Yong-Il Kwon","doi":"10.6110/kjacr.2023.35.9.434","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.9.434","url":null,"abstract":"","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87194781","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 : 2023-09-30DOI: 10.6110/kjacr.2023.35.9.443
J. Park, Peyman Gholamalizadeh, Mahdi Koushaeian, Abdullah Khan, Quang Duong Xuan, Jae Dong Chung
{"title":"Numerical Analysis of Bus Interior Parameters According to Environmental Conditions: (1) Evaluation of Thermal and Fluid Characteristics","authors":"J. Park, Peyman Gholamalizadeh, Mahdi Koushaeian, Abdullah Khan, Quang Duong Xuan, Jae Dong Chung","doi":"10.6110/kjacr.2023.35.9.443","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.9.443","url":null,"abstract":"","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"152 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76439509","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 : 2023-09-30DOI: 10.6110/kjacr.2023.35.9.421
Yu-Ra Son, Seung-Bin Kim, Jeong-Hoon Yang
{"title":"A Study on Indoor Air Quality Monitoring According to the Type of Ventilation System Using ESP-NOW Communication","authors":"Yu-Ra Son, Seung-Bin Kim, Jeong-Hoon Yang","doi":"10.6110/kjacr.2023.35.9.421","DOIUrl":"https://doi.org/10.6110/kjacr.2023.35.9.421","url":null,"abstract":"","PeriodicalId":61437,"journal":{"name":"制冷与空调","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74265898","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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