A Study on Local Cooling of Garments with Ventilation Fans and Openings Placed at Different Torso Sites
Författare
Summary, in English
Abstract in Undetermined
The aim of the study was to examine the various design features of ventilated
garments on cooling performance. Five jackets with small ventilation units and
closable openings were designed. The ventilation units with a flow rate of 12 l/s were
placed at five different torso sites. They were examined on a sweating thermal
manikin in four clothing opening conditions in a warm environment
(Ta=Tmanikin=34 °C, RH=60 %, Va=0.4 m/s). Total torso cooling was increased by 137
to 251 %, and clothing total dynamic evaporative resistance was decreased by 43 to
69 %. Neither the ventilation location nor the opening design had a significant
difference on total torso cooling. The ventilation location had a significant difference
on localized intra-torso cooling, but not the opening design. When the ventilation
units were placed at the local zone where it was ventilated, that zone underwent the
highest cooling than other local zones. The study indicated that the ventilation units
should be placed at the region where it required the most evaporative cooling, e.g.
along the spine area and the lower back. The openings could be adjusted (closed or
opened) to make comfortable air pressure for the wearers but without making
significant difference on the whole torso cooling under this flow rate.
The aim of the study was to examine the various design features of ventilated
garments on cooling performance. Five jackets with small ventilation units and
closable openings were designed. The ventilation units with a flow rate of 12 l/s were
placed at five different torso sites. They were examined on a sweating thermal
manikin in four clothing opening conditions in a warm environment
(Ta=Tmanikin=34 °C, RH=60 %, Va=0.4 m/s). Total torso cooling was increased by 137
to 251 %, and clothing total dynamic evaporative resistance was decreased by 43 to
69 %. Neither the ventilation location nor the opening design had a significant
difference on total torso cooling. The ventilation location had a significant difference
on localized intra-torso cooling, but not the opening design. When the ventilation
units were placed at the local zone where it was ventilated, that zone underwent the
highest cooling than other local zones. The study indicated that the ventilation units
should be placed at the region where it required the most evaporative cooling, e.g.
along the spine area and the lower back. The openings could be adjusted (closed or
opened) to make comfortable air pressure for the wearers but without making
significant difference on the whole torso cooling under this flow rate.
Avdelning/ar
Publiceringsår
2013
Språk
Engelska
Sidor
232-237
Publikation/Tidskrift/Serie
International Journal of Industrial Ergonomics
Volym
43
Issue
3
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Production Engineering, Human Work Science and Ergonomics
Nyckelord
- Local cooling
- Ventilation
- Opening
- Evaporation
Status
Published
Forskningsgrupp
- Thermal Environment Laboratory
ISBN/ISSN/Övrigt
- ISSN: 0169-8141