The role of design parameters on the performance of diffuse ceiling ventilation systems - thermal comfort analyses for indoor environment

作     者：Sadeghian, Parastoo Rahnama, Samira Afshari, Alireza Sadrizadeh, Sasan 

作者机构：KTH Royal Inst Technol Dept Civil & Architectural Engn Brinellvagen 23 SE-10044 Stockholm Sweden Aalborg Univ Dept Built Environm Copenhagen Denmark Malardalen Univ Sch Business Soc & Engn Vasteras Sweden 

出 版 物：《ADVANCES IN BUILDING ENERGY RESEARCH》 (建筑能量研究进展)

年 卷 期：2022年第16卷第6期

页      面：806-824页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Swedish Research Council Formas [2017-01088] Formas [2017-01088] Funding Source: Formas 

主　　题：Diffuse ceiling ventilation thermal comfort PMV-PPD model draft rate computational fluid dynamics simulation 

摘      要：Thermal comfort conditions profoundly affect the occupants health and productivity. A diffuse ceiling ventilation system is an air distribution system in which the air is supplied to the occupied zone with relatively a low velocity through the perforated panels installed in the ceiling. The current study evaluated the impact of diffuse ceiling design parameters, i.e. diffuse panel configurations and heat load distributions, on the thermal comfort condition of the occupants. In this regard, the computational fluid dynamics technique was used to evaluate thermal comfort conditions in a waiting room, meeting room and office. The central and dispersal configuration of active diffuse panels was considered. The PMV-PPD model was applied to evaluate the overall occupants comfort, while the draft rate was considered to assess local thermal comfort. The model validation was performed by comparing the collected laboratory measurement data. Overall, the results indicated that the central active diffuse panel configuration had a better thermal comfort than the dispersed one. The evaluation of dispersed configuration in realist scenarios, including office and waiting room, had the highest dissatisfaction, with a PPD value of 9%. Local thermal comfort assessment revealed that dispersed configuration had the highest draft rate of 14% in the office.