Thermal comfort and energy consumption of the radiant ceiling panel system.: Comparison with the conventional all-air system |
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| Affiliation: | 1. Energy Technology Research Institute, Tokyo Gas, 16-25, Shibaura 1-chome, Minato-ku, Tokyo 105, Japan;2. Building Research Institute, Ministry of Construction, Japan;1. Department of Architecture, Graduate School, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-744, South Korea;2. School of Architecture, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk, 730-701, South Korea;3. Department of Architecture, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-744, South Korea;1. Department of Architecture, School of Design, Shanghai Jiao Tong University, Shanghai, 200240, China;2. School of Civil Engineering, Dalian University of Technology, Dalian, Liaoning Province, 116024, China;3. College of Architecture, Xi''an University of Architecture and Technology, Xi''an, Shaanxi, 710055, China;4. Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China;5. State Key Laboratory of Subtropical Building Science, Department of Architecture, South China University of Technology, Wushan, Guangzhou, 510640, China;6. School of Mechanical Engineering, Tongji University, Shanghai, 200092, China;7. School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China;8. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, China;9. School of Mechanical and Electrical Engineering, Shenzhen Polytechnic, Guangdong, 518055, China;1. Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of commerce, Tianjin, China;2. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | The purpose of this study is to investigate the various characteristics of a radiant ceiling panel system and their practical application to office buildings. The radiant ceiling panel system and conventional air-conditioning system were compared in terms of thermal comfort, energy consumption, and cost. Thermal environment, along with human response, was tested by using a small meeting room equipped with radiant ceiling panels. The responses were collected by questionnaires given to the male subjects in the room. The experiment for the female subjects was conducted separately. Results show that the radiant ceiling panel system is capable of creating smaller vertical variation of air temperature and a more comfortable environment than conventional systems. When using a cooled ceiling, a small volume of supplied air creates a less draught environment, which reduced the discomfort of feeling cold in the lower part of the body. Numerical simulation of yearly energy consumption and cost estimation were conducted. Typical office rooms located on the 3rd, 4th, and 5th floor of a six-floor building in the Tokyo area were simulated. Since part of the sensible heat load is handled by radiant ceiling panels, the volume of supplied air can be reduced, leading to lower energy consumption for air transport. By using the radiant ceiling panel system in one of the three floors of the simulated building, energy consumption can be reduced by 10%. Estimated pay back time was from 1 to 17 years depending on the market price of the radiant ceiling panel. |
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