Kyushu University Academic Staff Educational and Research Activities Database
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YOUNGJIN CHOI Last modified date:2019.07.05

Graduate School
Undergraduate School

Academic Degree
Doctor of Engineering
Field of Specialization
Architectural Environment
Research Interests
  • Development of popular direct gain house by optimizing openings, solar control, and latent heat storage building materials
    keyword : Solar heating, direct gain, PCM, siulation, near infrared reflection film
  • Research and development on a regional adaptation of solar thermal full utilization type houses
    keyword : Air-based solar heating system, heating/cooling/hot-water, measurement, simulation
Academic Activities
1. Youngjin Choi, Hyun Bae Kim, Climate Classification for the Use of Solar Thermal Systems in East Asia, Energies, 10.3390/en12122286, 12, 12, 2286-2302, 2019.06.
2. Youngjin Choi, Masayuki Mae, HyunBae Kim, Thermal performance improvement method for air-based solar heating systems, Solar Energy, 10.1016/j.solener.2019.04.061, 186, 277-290, 2019.07.
3. Youngjin Choi, Masayuki Mae, Hyunwoo Roh, Wanghee Cho, Annual Heating and Hot Water Load Reduction Effect of Air-Based Solar Heating System Using Thermal Simulation, Energies, 10.3390/en12061054, 12, 1054, 2019.03.
4. Youngjin Choi, Kozo Takase, Masayuki Mae, System performance of a residential building using the air-based solar heating system, Solar Energy, 10.1016/j.solener.2018.06.009, 171, 47-63, 2018.09, To apprehend the performance of a solar heating system, it is important to first understand the relationship between the heating load and the system elements, such as heat collection, heat storage, and insulation, among
others. Due to the fact that the performance of solar heating systems fluctuates with weather conditions, in this study, measurements in three huts were collected at the same time in order to compare the influence by these
factors on the system. By installing insulation on concrete, the heat absorption amount of the base concrete was reduced by 13.2% and the heat release amount was increased by 12.0%. This result shows the necessity of
insulation in case of using underground space for heat storage in a solar heating system. Also, the possibility of water pack as thermal storage was presented for a solar heating system..
5. Youngjin Choi, An Experimental Study of the Solar Collection Performance of Liquid-Type Solar Collectors under Various Weather Conditions, Energies, 10.3390/en11071626, 11, 7, 2018.06.
6. Hyun Bae Kim, Masayuki Mae, Youngjin Choi, Application of shape-stabilized phase-change material sheets as thermal energy storage to reduce heating load in Japanese climate, Building and Environment, 10.1016/j.buildenv.2017.08.038, 125, 1-14, 2017.11.
7. Hyun Bae Kim, Masayuki Mae, Youngjin Choi, Takeshi Kiyota, Experimental analysis of thermal performance in buildings with shape-stabilized phase change materials, Energy and buildings, 10.1016/j.enbuild.2017.07.076, 152, 524-533, 2017.10.
8. Jongyeon Lim, Yasunori Akashi, Ryozo Ooka, Hideki Kikumoto, Youngjin Choi, A probabilistic approach to the energy-saving potential of natural ventilation: Effect of approximation method for approaching wind velocity, Building and environment, 10.1016/j.buildenv.2017.06.008, 122, 94-104, 2017.09.
9. Doosam Song, Youngjin Choi, Effect of building regulation on energy consumption in residential buildings in Korea, Renewable and Sustainable Energy Reviews, 10.1016/j.rser.2011.10.008, 16, 1, 1074-1081, 2012.01.
10. Youngjin Choi, Jungmin Seo, Doosam Song, Joonhoon Lee, Seungbok Leigh, Taeyeon Kim, A Simulation Methods of thermal performance for an balcony window in Multi-residential house, Architectural Institute of Korea, 25, 1, 271-278, 2009.01.
11. Jungmin Seo, Youngjin Choi, Doosam Song, Hyunjae Chang, Sangjin Kim, Effect of the balcony space on thermal environment and Heating/Cooling Load in and Apartment House, The Society of Air-conditioning and Refrigerating Engineers of Korea, 19, 5, 364-371, 2007.05.
1. Youngjin Choi, Performance of the air-based solar heating system, International Conference on New Energy and Applications, 2018.11.
2. Youngjin Choi, Performance Improvement of Liquid-type Solar Collector System, International Conference on Renewable Energy Research and Applications, 2018.10.
3. Youngjin Choi, Performance improvements of the air-based solar heating system (Improvement method of thermal performance)
, International Conference on Power and Renewable Energy, 2018.09.
4. Youngjin Choi,Kozo Takase,Masayuki Mae,Hyunwoo Roh, Study on the Reduction Effect of Ventilation and Heating Load by Installing Air-based Solar System in the Detached Houses, AIVC, 2015.09.
5. Youngjin Choi,Katsuya Obara,Kozo Takase,Makoto Satoh,Masayuki Mae,Hyunwoo Roh,Seiji Komano, A Research of Detached Houses with Air-based Solar System Intended to Full Solar Energy Use:Part3. Study on The Performance Improvement Methods of Air-based Solar Heating/Hot-water Supply System by Simulation. Grand Renewable Energy, Grand Renewable Energy, 2014.07.
6. Youngjin Choi,Kozo Takase,Makoto Satoh,Masayuki Mae, Evaluation of the Applicability of Solar Radiant Heating System in Residential Houses, Cobee2012, 2012.08.
7. Youngjin Choi,Jungmin Seo,Doosam Song, A Study on Application Methods of Hybrid Ventilation in Multi-Residential Building, Clima 2010, 2010.05.
8. Youngjin Choi,Jungmin Seo,Doosam Song, A Study on Optimal Control Method of Hybrid Ventilation, International Conference on Sustainable Building Asia, 2010.02.
9. Youngjin Choi,Jungmin Seo,Doosam Song, A Study on the Wind Environmental Characteristics with the Changes of Arrangement in Multi-residential Building Block, Roomvent 2009, 2009.05.
10. Youngjin Choi,Jungmin Seo,Doosam Song, Thermal Effect of the Balcony Space in Multi-story Residential Buildings, Roomvent 2007, 2007.06.
11. Youngjin Choi,Jungmin Seo,Doosam Song, Effect of Balcony Space in Multi-residential House, International Conference on Sustainable Building Asia, 2007.06.