Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study
Air-conditioning systems are employed to provide thermal comfort inside buildings. Therefore, several air-conditioning and mechanical ventilation (ACMV) systems have been tested and applied in different climates. Chilled beam systems are a new addition to it and have been in the application in Europ...
| Main Authors: | , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/105621 http://hdl.handle.net/10220/50261 |
| _version_ | 1811694100843331584 |
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| author | Lamano, Adrian Sansoldi Azad, Abdus Salam Rakshit, Dibakar Wan, Man Pun Babu, Sushanth Sarvaiya, Jatin N. Zhang, Zhe Krishnasayee, Krithika Gao, Chun Ping Valliappan, Selvam Goh, Alice Seoh, Alvin Kumar, Divya E. V. S. Kiran |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Lamano, Adrian Sansoldi Azad, Abdus Salam Rakshit, Dibakar Wan, Man Pun Babu, Sushanth Sarvaiya, Jatin N. Zhang, Zhe Krishnasayee, Krithika Gao, Chun Ping Valliappan, Selvam Goh, Alice Seoh, Alvin Kumar, Divya E. V. S. Kiran |
| author_sort | Lamano, Adrian Sansoldi |
| collection | NTU |
| description | Air-conditioning systems are employed to provide thermal comfort inside buildings. Therefore, several air-conditioning and mechanical ventilation (ACMV) systems have been tested and applied in different climates. Chilled beam systems are a new addition to it and have been in the application in Europe and North America since last two decades. In the present study, comparative performance of active chilled beam (ACB) system with conventional fan coil unit (FCU) system has been appraised in regards to thermal comfort for the tropical region of Singapore. Experiments were carried out in a simulated office building with approximately 80% glazed area under real environmental conditions. Room air temperature, air velocity, mean radiant temperature (MRT) and relative humidity which are important thermal comfort parameters were measured in perimeter zone inside the cells and assessed. It was perceived that the ACB system was providing acceptable thermal comfort as per the standard of SS 554. General thermal comfort has been assessed based on an index of PMV-PPD model and graphical method. With regard to the local thermal discomfort: indices of air draught, vertical air temperature difference (VATD) and radiant temperature asymmetry have also been evaluated. The entrance of solar radiation through window façade may have a significant impact on the asymmetry of the radiant field and can enhance thermal discomfort of the occupants. Therefore, in the study radiant temperature asymmetry has been calculated extensively. The results show that ACB system yields satisfactory thermal environment as per ISO 7730 standard and sometimes performs even better than conventional FCU system. |
| first_indexed | 2024-10-01T07:02:13Z |
| format | Journal Article |
| id | ntu-10356/105621 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:02:13Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1056212021-01-08T07:09:48Z Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study Lamano, Adrian Sansoldi Azad, Abdus Salam Rakshit, Dibakar Wan, Man Pun Babu, Sushanth Sarvaiya, Jatin N. Zhang, Zhe Krishnasayee, Krithika Gao, Chun Ping Valliappan, Selvam Goh, Alice Seoh, Alvin Kumar, Divya E. V. S. Kiran School of Mechanical and Aerospace Engineering Energy Research Institute @ NTU (ERI@N) Active Chilled Beam Engineering::Mechanical engineering Conventional Fan Coil Unit Air-conditioning systems are employed to provide thermal comfort inside buildings. Therefore, several air-conditioning and mechanical ventilation (ACMV) systems have been tested and applied in different climates. Chilled beam systems are a new addition to it and have been in the application in Europe and North America since last two decades. In the present study, comparative performance of active chilled beam (ACB) system with conventional fan coil unit (FCU) system has been appraised in regards to thermal comfort for the tropical region of Singapore. Experiments were carried out in a simulated office building with approximately 80% glazed area under real environmental conditions. Room air temperature, air velocity, mean radiant temperature (MRT) and relative humidity which are important thermal comfort parameters were measured in perimeter zone inside the cells and assessed. It was perceived that the ACB system was providing acceptable thermal comfort as per the standard of SS 554. General thermal comfort has been assessed based on an index of PMV-PPD model and graphical method. With regard to the local thermal discomfort: indices of air draught, vertical air temperature difference (VATD) and radiant temperature asymmetry have also been evaluated. The entrance of solar radiation through window façade may have a significant impact on the asymmetry of the radiant field and can enhance thermal discomfort of the occupants. Therefore, in the study radiant temperature asymmetry has been calculated extensively. The results show that ACB system yields satisfactory thermal environment as per ISO 7730 standard and sometimes performs even better than conventional FCU system. Accepted version 2019-10-25T02:57:02Z 2019-12-06T21:54:42Z 2019-10-25T02:57:02Z 2019-12-06T21:54:42Z 2018 Journal Article Azad, A. S., Rakshit, D., Wan, M. P., Babu, S., Sarvaiya, J. N., Kumar, D. E. V. S. K., . . . Seoh, A. (2018). Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study. Building and Environment, 145, 196-212. doi:10.1016/j.buildenv.2018.09.025 0360-1323 https://hdl.handle.net/10356/105621 http://hdl.handle.net/10220/50261 10.1016/j.buildenv.2018.09.025 en Building and Environment © 2018 Elsevier Ltd. All rights reserved. This paper was published in Building and Environment and is made available with permission of Elsevier Ltd. 51 p. application/pdf |
| spellingShingle | Active Chilled Beam Engineering::Mechanical engineering Conventional Fan Coil Unit Lamano, Adrian Sansoldi Azad, Abdus Salam Rakshit, Dibakar Wan, Man Pun Babu, Sushanth Sarvaiya, Jatin N. Zhang, Zhe Krishnasayee, Krithika Gao, Chun Ping Valliappan, Selvam Goh, Alice Seoh, Alvin Kumar, Divya E. V. S. Kiran Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title | Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title_full | Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title_fullStr | Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title_full_unstemmed | Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title_short | Evaluation of thermal comfort criteria of an active chilled beam system in tropical climate : a comparative study |
| title_sort | evaluation of thermal comfort criteria of an active chilled beam system in tropical climate a comparative study |
| topic | Active Chilled Beam Engineering::Mechanical engineering Conventional Fan Coil Unit |
| url | https://hdl.handle.net/10356/105621 http://hdl.handle.net/10220/50261 |
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