Objective and subjective evaluation of a sleeping environment test chamber with a thermoelectric air cooling system

Kashif Irshad, Asif Irshad Khan, Salem Algarni, Khairul Habib, Bidyut Baran Saha

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Currently, comfort analyses of buildings equipped with thermoelectric air cooling or heating systems mainly focus on when occupants are in a wakeful state. In this study, both objective and subjective analyses of the sleeping behavior for fifteen (15) healthy occupants were conducted by exposing the occupants to two sleeping environments (i.e., test room equipped with the thermoelectric air duct cooling system (TE-AD) and naturally ventilated test room (NH)). The result shows that there were significant variations in the sleep satisfaction level in the test room with TE-AD and NH. Occupants felt more comfortable (5) and a slightly cooler thermal environment (3) while sleeping in the test room equipped with the TE-AD system. Their body movements, heart rate and sleeping stages shift from non-rapid eye movement (NREM) to rapid eye movement (REM) and then to the waking stage (WS), was less in test room with the TE-AD system as compared to NH. The occupants gave slightly hot (5) for indoor climatic ratings in NH room and felt a slightly uncomfortable (3) while sleeping. The PMV and PPD analyses showed that occupants were very sensitive to climatic conditions around bed and with slightly change in temperature (1.2 ± 0.4 °C) results in the shifting of sleeping stages. For the TE-AD room, the average occupant sleep onset latency was 19 ± 0.5 min, which is 20 ± 0.4 min lesser than NH room.

Original languageEnglish
Pages (from-to)155-165
Number of pages11
JournalBuilding and Environment
Volume141
DOIs
Publication statusPublished - Aug 15 2018

Fingerprint

Eye movements
Cooling systems
chamber
air
cooling
Air
evaluation
sleep
Ducts
Cooling
Heating
heat pump
building
Temperature
rating
Sleep
test
heating
temperature
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

Cite this

Objective and subjective evaluation of a sleeping environment test chamber with a thermoelectric air cooling system. / Irshad, Kashif; Khan, Asif Irshad; Algarni, Salem; Habib, Khairul; Saha, Bidyut Baran.

In: Building and Environment, Vol. 141, 15.08.2018, p. 155-165.

Research output: Contribution to journalArticle

Irshad, Kashif ; Khan, Asif Irshad ; Algarni, Salem ; Habib, Khairul ; Saha, Bidyut Baran. / Objective and subjective evaluation of a sleeping environment test chamber with a thermoelectric air cooling system. In: Building and Environment. 2018 ; Vol. 141. pp. 155-165.
@article{442a74ffafa7419ab070beea555b1077,
title = "Objective and subjective evaluation of a sleeping environment test chamber with a thermoelectric air cooling system",
abstract = "Currently, comfort analyses of buildings equipped with thermoelectric air cooling or heating systems mainly focus on when occupants are in a wakeful state. In this study, both objective and subjective analyses of the sleeping behavior for fifteen (15) healthy occupants were conducted by exposing the occupants to two sleeping environments (i.e., test room equipped with the thermoelectric air duct cooling system (TE-AD) and naturally ventilated test room (NH)). The result shows that there were significant variations in the sleep satisfaction level in the test room with TE-AD and NH. Occupants felt more comfortable (5) and a slightly cooler thermal environment (3) while sleeping in the test room equipped with the TE-AD system. Their body movements, heart rate and sleeping stages shift from non-rapid eye movement (NREM) to rapid eye movement (REM) and then to the waking stage (WS), was less in test room with the TE-AD system as compared to NH. The occupants gave slightly hot (5) for indoor climatic ratings in NH room and felt a slightly uncomfortable (3) while sleeping. The PMV and PPD analyses showed that occupants were very sensitive to climatic conditions around bed and with slightly change in temperature (1.2 ± 0.4 °C) results in the shifting of sleeping stages. For the TE-AD room, the average occupant sleep onset latency was 19 ± 0.5 min, which is 20 ± 0.4 min lesser than NH room.",
author = "Kashif Irshad and Khan, {Asif Irshad} and Salem Algarni and Khairul Habib and Saha, {Bidyut Baran}",
year = "2018",
month = "8",
day = "15",
doi = "10.1016/j.buildenv.2018.05.061",
language = "English",
volume = "141",
pages = "155--165",
journal = "Building and Environment",
issn = "0360-1323",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Objective and subjective evaluation of a sleeping environment test chamber with a thermoelectric air cooling system

AU - Irshad, Kashif

AU - Khan, Asif Irshad

AU - Algarni, Salem

AU - Habib, Khairul

AU - Saha, Bidyut Baran

PY - 2018/8/15

Y1 - 2018/8/15

N2 - Currently, comfort analyses of buildings equipped with thermoelectric air cooling or heating systems mainly focus on when occupants are in a wakeful state. In this study, both objective and subjective analyses of the sleeping behavior for fifteen (15) healthy occupants were conducted by exposing the occupants to two sleeping environments (i.e., test room equipped with the thermoelectric air duct cooling system (TE-AD) and naturally ventilated test room (NH)). The result shows that there were significant variations in the sleep satisfaction level in the test room with TE-AD and NH. Occupants felt more comfortable (5) and a slightly cooler thermal environment (3) while sleeping in the test room equipped with the TE-AD system. Their body movements, heart rate and sleeping stages shift from non-rapid eye movement (NREM) to rapid eye movement (REM) and then to the waking stage (WS), was less in test room with the TE-AD system as compared to NH. The occupants gave slightly hot (5) for indoor climatic ratings in NH room and felt a slightly uncomfortable (3) while sleeping. The PMV and PPD analyses showed that occupants were very sensitive to climatic conditions around bed and with slightly change in temperature (1.2 ± 0.4 °C) results in the shifting of sleeping stages. For the TE-AD room, the average occupant sleep onset latency was 19 ± 0.5 min, which is 20 ± 0.4 min lesser than NH room.

AB - Currently, comfort analyses of buildings equipped with thermoelectric air cooling or heating systems mainly focus on when occupants are in a wakeful state. In this study, both objective and subjective analyses of the sleeping behavior for fifteen (15) healthy occupants were conducted by exposing the occupants to two sleeping environments (i.e., test room equipped with the thermoelectric air duct cooling system (TE-AD) and naturally ventilated test room (NH)). The result shows that there were significant variations in the sleep satisfaction level in the test room with TE-AD and NH. Occupants felt more comfortable (5) and a slightly cooler thermal environment (3) while sleeping in the test room equipped with the TE-AD system. Their body movements, heart rate and sleeping stages shift from non-rapid eye movement (NREM) to rapid eye movement (REM) and then to the waking stage (WS), was less in test room with the TE-AD system as compared to NH. The occupants gave slightly hot (5) for indoor climatic ratings in NH room and felt a slightly uncomfortable (3) while sleeping. The PMV and PPD analyses showed that occupants were very sensitive to climatic conditions around bed and with slightly change in temperature (1.2 ± 0.4 °C) results in the shifting of sleeping stages. For the TE-AD room, the average occupant sleep onset latency was 19 ± 0.5 min, which is 20 ± 0.4 min lesser than NH room.

UR - http://www.scopus.com/inward/record.url?scp=85047825187&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047825187&partnerID=8YFLogxK

U2 - 10.1016/j.buildenv.2018.05.061

DO - 10.1016/j.buildenv.2018.05.061

M3 - Article

AN - SCOPUS:85047825187

VL - 141

SP - 155

EP - 165

JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

ER -