TY - JOUR
T1 - Individually controlled localized chilled beam with background radiant cooling system : Human subject testing
AU - Arghand, Taha
AU - Melikov, Arsen
AU - Bolashikov, Zhecho
AU - Mustakallio, Panu
AU - Kosonen, Risto
N1 - Funding Information:
The study is supported by Business Finland and the International Centre for Indoor Environment and Energy, Department of Civil Engineering, Technical University of Denmark .
Publisher Copyright:
© 2022 The Author(s)
PY - 2022/6/15
Y1 - 2022/6/15
N2 - This study examines the responses of twenty-four subjects to an individually-controlled localized chilled beam (LCB) and compares it to a mixing ventilation (MV) as the reference system. Both LCB and MV also used ceiling cooling (CC) panels for background cooling (forming LCBCC and MVCC systems). The LCB directed the supply air towards the subjects to create a micro-environment around them. Four experimental conditions were established using a combination of two room temperatures (26 °C and 28 °C) and two primary ventilation rates (10 l/s and 13 l/s). During the 90 min-long experiments, the subjects were asked to assess their perceived air quality, thermal sensation, comfort, air movement acceptability and acceptability of the work environment. The results indicated that the LCBCC was superior to the MVCC with significantly higher acceptability of the work environment, perceived air quality and thermal sensation. Perceived air quality and thermal sensation were rated near the “clearly acceptable” level for both room temperatures when LCBCC was used. Moreover, thermal sensation votes were close to the “neutral” level for room temperatures as high as 26 °C and 28 °C. The micro-environment established by the LCB was found to be resilient to changes in room temperature. With the MVCC, the thermal environment was rated as “slightly warm”. No major potential risk of draught among the subjects was reported when using the LCBCC. The findings of this study contribute to the development of high-temperature cooling systems in general, and localized ventilation systems in particular.
AB - This study examines the responses of twenty-four subjects to an individually-controlled localized chilled beam (LCB) and compares it to a mixing ventilation (MV) as the reference system. Both LCB and MV also used ceiling cooling (CC) panels for background cooling (forming LCBCC and MVCC systems). The LCB directed the supply air towards the subjects to create a micro-environment around them. Four experimental conditions were established using a combination of two room temperatures (26 °C and 28 °C) and two primary ventilation rates (10 l/s and 13 l/s). During the 90 min-long experiments, the subjects were asked to assess their perceived air quality, thermal sensation, comfort, air movement acceptability and acceptability of the work environment. The results indicated that the LCBCC was superior to the MVCC with significantly higher acceptability of the work environment, perceived air quality and thermal sensation. Perceived air quality and thermal sensation were rated near the “clearly acceptable” level for both room temperatures when LCBCC was used. Moreover, thermal sensation votes were close to the “neutral” level for room temperatures as high as 26 °C and 28 °C. The micro-environment established by the LCB was found to be resilient to changes in room temperature. With the MVCC, the thermal environment was rated as “slightly warm”. No major potential risk of draught among the subjects was reported when using the LCBCC. The findings of this study contribute to the development of high-temperature cooling systems in general, and localized ventilation systems in particular.
KW - Air movement
KW - Human response
KW - Localized chilled beam
KW - Micro-environment
KW - Personal control
KW - Radiant cooling
UR - http://www.scopus.com/inward/record.url?scp=85129013137&partnerID=8YFLogxK
U2 - 10.1016/j.buildenv.2022.109124
DO - 10.1016/j.buildenv.2022.109124
M3 - Article
AN - SCOPUS:85129013137
SN - 0360-1323
VL - 218
JO - Building and Environment
JF - Building and Environment
M1 - 109124
ER -