A Study on Local Cooling of Garments with Ventilation Fans and Openings Placed at Different Torso Sites

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A Study on Local Cooling of Garments with Ventilation Fans and Openings Placed at Different Torso Sites. / Zhao, Mengmeng; Gao, Chuansi; Wang, Faming; Kuklane, Kalev; Holmér, Ingvar; Li, Jun.

I: International Journal of Industrial Ergonomics, Vol. 43, Nr. 3, 2013, s. 232-237.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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Zhao, Mengmeng ; Gao, Chuansi ; Wang, Faming ; Kuklane, Kalev ; Holmér, Ingvar ; Li, Jun. / A Study on Local Cooling of Garments with Ventilation Fans and Openings Placed at Different Torso Sites. I: International Journal of Industrial Ergonomics. 2013 ; Vol. 43, Nr. 3. s. 232-237.

RIS

TY - JOUR

T1 - A Study on Local Cooling of Garments with Ventilation Fans and Openings Placed at Different Torso Sites

AU - Zhao, Mengmeng

AU - Gao, Chuansi

AU - Wang, Faming

AU - Kuklane, Kalev

AU - Holmér, Ingvar

AU - Li, Jun

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - Local cooling

KW - Ventilation

KW - Opening

KW - Evaporation

U2 - 10.1016/j.ergon.2013.01.001

DO - 10.1016/j.ergon.2013.01.001

M3 - Article

VL - 43

SP - 232

EP - 237

JO - International Journal of Industrial Ergonomics

JF - International Journal of Industrial Ergonomics

SN - 0169-8141

IS - 3

ER -