• Title, Summary, Keyword: thermal manikin

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Dressing Poses in Relation to Clothing Thermal Insulation

  • Li, Jun;Zhang, Weiyuan;Liu, Yan
    • Fashion & Textile Research Journal
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    • v.4 no.6
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    • pp.544-549
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    • 2002
  • By the movable thermal manikin developed by China Dong Hua university, the laws of clothing thermal insulation influenced by dressing poses are studied. It is found that $I_a$ on nude thermal manikin has no relation to testing pose as a whole (notable level is 5%), while the change of testing pose influences $I_a$ value on parts of body obviously. The testing result $I_{cle}$ on clothed thermal manikin has relation to testing pose. The $I_{cle}$ value of the whole body in seated pose decreases 20 percent compared with that in standing pose (notable level is 1%). In view of heat transmission theory, the reasons are pointed out based on the knowledge of heat transmission.

Transient Heat Flux Evaluation of Underwear for Protective Clothing using Sweating Manikin (발한 마네킹을 이용한 보호복용 언더웨어의 동적(Transient) 열류량 평가)

  • Park, Hye-Jun;Kim, Hyun-Jung;Hong, Kyung-Hi
    • Journal of the Korean Society of Clothing and Textiles
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    • v.32 no.1
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    • pp.157-165
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    • 2008
  • Transient thermal response of five types of underwear(cotton jersey, wool jersey, nylon jersey, cotton mesh and polyester mesh) for a protective coverall is evaluated using a sweating thermal manikin. Experimental protocol for transient thermal response of the sweating thermal manikin was also proposed. As results, it was found that steady state thermal response from sweating thermal manikin was not sensitive enough to evaluate thermal comfort of the experimental garments. However, when half time is used as an index of the heat flux change in transient thermal response, difference was found among underwear materials. Half time of cotton was the shortest and heat transfer of cotton was the fastest followed by polyester mesh, cotton jersey, nylon jersey and wool jersey. Dynamic thermal response of wool underwear was quite different from that of cotton underwear. Wool shows quite less heat flow at the initial stage, however, moisture permeability of wool was higher than cotton at the later stage. It was difficult to distinguish surface temperature difference visually using thermogram taken right before the completion of dry and wet test in steady state thermal response.

Wear Comfort Evaluation on Water-vapor-permeable (WVP) Garments Using a Movable Sweating Thermal Manikin (발한써멀마네킨을 이용한 투습방수의류의 착용쾌적성 평가)

  • Kang, Inhyeng;Lee, Han Sup
    • Journal of the Korean Society of Clothing and Textiles
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    • v.37 no.8
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    • pp.1095-1106
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    • 2013
  • This study evaluated the wear comfort properties of water-vapor-permeable (WVP) garments using a movable sweating thermal manikin. Manikin tests were performed in a climatic chamber (temperature T=20, $35{\pm}0.5^{\circ}C$ and relative humidity $H=50{\pm}10%$) using seven sportswear outfits (a long sleeve shirts and a long pants) made with seven different WVP fabrics. Physiological responses of wear trials could be correlated with measurement parameters of the thermal manikin experiment; subsequently, a regression model that represented a final comfort sensation could be obtained. The regression model developed in this work is based on thermal manikin measurements; consequently, it provides an independent comfort sensation level in a relatively short time at a low cost while maintaining the reproducibility of results. It translates into more actual choices for sportswear manufacturers and sportswear consumers.

Effects of garment types on thermal insulation using a thermal manikin (의복 형태가 보온력에 미치는 영향;써멀 마네킹 착용 실험에 의한)

  • 손원교;백윤정
    • Journal of the Korean Society of Clothing and Textiles
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    • v.23 no.8
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    • pp.1110-1118
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    • 1999
  • This study was to examine the effects of garment types on thermal insulation using a thermal manikin. cotton polyester wool silk and rayon were selected as outer wears like a blouse a skirt slacks and one-piece for this study Acetate was chosen as a lining. Brief and upper innerwear with long sleeves(cotton) were also chosen as the innerwear. The results were as follows: 1. The thermal insulation of the garment of single layer was in proportion to the covering area of garment in all types of clothing. 2. On adding the innerwear or the lining or both the thermal insulation of the each garment of single layer were showed a different trends by garment types. The thermal manikin insulations of one-piece dress adding the innerwear was higher than those of blouse-skirt suits. The thermal insulation of one-piece dress adding the innerwear and lining was lower than those of blouse-skirt suits. 3. The increasing rates of thermal insulation of multi-layered garments had different value by garment types but garment made of rayon and silk were showed very high increasing rates of thermal insulation. 4. The increasing rates of the thermal insulation of one-piece dress added the lining the innerwear or both except polyester showed the highest value and then blouse-slacks suits' turn came ound Blouse-skirt suits had the lowest the increasing rates of thermal insualition value.

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Study on Thermal Insulation Property of Military Cold-Weather Clothing Using a Thermal Manikin (써멀마네킨을 이용한 군용 방한복의 보온성 평가에 관한 연구)

  • Jin, Yong Bum;Kim, Sungmin;Han, Hyun Jung;Sa, A Na;Park, Chang Kyu
    • Textile Science and Engineering
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    • v.55 no.1
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    • pp.48-55
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    • 2018
  • This paper proposes a novel test method for the evaluation of thermal insulation capability of military cold-weather clothing. A new evaluation method for thermal insulation using a thermal manikin was developed, and the thermal insulation capabilities of various materials were tested using the proposed method. The experiment was conducted under environmental conditions similar to that of actual military operations. The thermal insulation capability and specific mass were evaluated for 31 innerwear and 9 outerwear items. The criteria for selecting the optimal winter clothing was proposed through the statistical analysis of the results of the experiments.

The Effects of Textiles for Thermal Insulation Value Using a Thermal Manikin (써멀 마네킹 착용실험에 의한 보온력에 미치는 의복소재의 영향)

  • Son Won-Kyo;Choi Jeong-Wha
    • Journal of the Korean Home Economics Association
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    • v.37 no.12
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    • pp.141-151
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    • 1999
  • This study was carried out to examine the effects of textile materials for thermal insulation value using a thermal manikin. Cotton, polyester, wool, silk and rayon were selected as outer wears like blouses, skirts, slacks, and one-pieces. Acetate was chosen as a lining. Brief and long sleeve upper underwear(cotton) were chosen as the inner wears. The results were as follows; There were no significant differences among the materials in skirts and blouse-skirt suits by the thermal manikin. However blouses, slacks, one-pieces and blouse-slacks suits were showed the effects of materials. Blouse-slacks suits was showed the highest thermal insulation value and one-piece had the lowest thermal insulation value.

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Studies on the Thermal Insulation Effect of the Boreal Men과s Folk Clothes(II) - Experiment on Thermal Manikin - (남자 한복의 열차단 효과에 관한 연구(II) -써멀마네킹 실험-)

  • Sung, Su-Kwang
    • Textile Science and Engineering
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    • v.34 no.5
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    • pp.282-287
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    • 1997
  • In estimating the thermal insulation effect (TIE) by an experiment of wearing clothes on human body, lack of reproducibility and each part of clothing insulation value have been pointed out. Therefore an electrically-heated manikin was used to study the effects of clothing materials and seasonal clothes on the thermal insulation value of KMFC. The manikin consisted of a black anodized copper skin formed to simulated the size and shape of a typical man (height 170 cm, body weight 60 kg). The manikin was instrumented with 17 skin thermistor in various locations on its body. We reached the conclusion below through the comparison of western style men's clothes and Korean women's folk clothes (KWFC), The TIE for KMFC is 0.63-0.84% for summer clothes and 1.28∼1.32 clo for spring and fall ones. For the total thermal resistance (1‥‥‥) when wearing KMFC, standing position has a bigger one than sitting position, and the change by each position is more than that of western style men's clothes. For the TIE of KMFC, that thermal resistance of the back part is more than that of western style men's clothes, which is a major factor causing bigger TIE. In addition, the weight per unit area of KMFC was highly positively correlated with the keeping warm.

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Determining thermal comfort properties of coverall worn in the atomic power plant using a sweating thermal manikin and ISO 7730 (발한 Thermal manikin과 국제 표준 7730을 이용한 원자력 발전소 작업복의 열적 쾌적성 판별)

  • 홍성애
    • Journal of the Ergonomics Society of Korea
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    • v.15 no.1
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    • pp.91-103
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    • 1996
  • For determining thermal comfort properties of work suit in an atomic power plant, three different coverall ensembles (PVE, PET/Rayon, PP Nonwoven) were selected and the resistance to dry and evaporative heat transfer were measured for each ensemble by using a sweating thermal manikin. Also, PMV (Predicted Mean Vote) and PPD(Predicted Percentage of Dissatisfied) indices were predicted according to ISO 7730. As a result, ideal environmental conditions in an atomic power plant were suggested to make workers feel thermally comfortable. In addition, ideal intrinsic insulation values of coverall ensembles as a work suit under the present environmental conditions in the at6omic power plant were provided. The information given in this paper can be used to control environmental conditions in the atomic power plant thermally comfortable and to select a proper work suit for providing thermal comfort to the workers.

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Physiological Responses of Cold Protective Clothing with Different clo Value (보온력 차이에 따른 방한복 상의의 인체착의 생리반응)

  • Lee, Jung-Sug;Kim, Hee-Eun;Song, Min-Kyu
    • Fashion & Textile Research Journal
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    • v.10 no.5
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    • pp.683-689
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    • 2008
  • The purpose of this study was to investigate physiological responses such as rectal temperature, skin temperature, micro climate, sweat rate and subjective sensations using cold protective clothing with five different clo value. The clo value was measured by thermal manikin in windless condition. Healthy five 20's males volunteered as subjects for wearing trial experiment. The climate chamber was controlled at $50^{\circ}C$, 65% RH. The experiment consisted of repeated exercise and recovery periods. We found that the higher clo value has, the higher mean skin temperature, micro climate and sweat rate show. They felt warm and wet with higher insulation clothing. Thermal comfort increased in the last recovery period after exercise. There was significant difference between five cold protective clothing. In correlation analysis of clo value, it showed that correlation coefficient(r) values were more than 0.8. Therefore, in terms of clothing insulation, we found that correlation between thermal manikin experiment and wearing trial experiment was high. Clothing insulation could be variable according to many factors such as body movement, covering area, clothing gap, layering and design. Considering the body movement, we thought that insulation measurement need to carry out both thermal manikin experiment and wearing trial experiment.

The Effects of Parka on Subject Wear Sensation as to Thermal Resistance (파카의 보온성에 따른 착용감에 관한 연구)

  • Lee Yoon-Jung;Lee Soon-Won
    • Journal of the Korean Society of Clothing and Textiles
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    • v.13 no.3
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    • pp.295-303
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    • 1989
  • This study is to measure the thermal resistance of 7 types of Parka of different materials with thermal manikin and to compare their effects on physiological responses & subjective wear sensations. Following are the results obtained from the experiments 1) From the thermal manikin experiment, i) As an outer layer, although not significant, water proof fabric was warmer than water proof-vapor permeable fabric. ii) In case of insulating material, down was better for thermal resistance than polyester wadding of the same thickness. Moreover, as the down was thicker, it had more efficiency in thermal resistance. However, the marginal efficiency of thickness was found to be decreasing. 2) From the male-subject experiments, i) Chest temperature, mean skin temperature & microclimate temperature showed the same results on thermal resistance as those of the thermal manikin experiment. ii) Only during rest periods, there was a significant difference among 5 insulating materials in the sense of microclimate humidity. The almost same conclusion was obtained from the above experiments. Even the outer layer did not significantly affect thermal resistance & subjective wear sensation, insulating materials had a significant influence upon them. But in case of 3.5 cm down, it gave less comfortable than that of the thinner. Therefore the optional one for the best comfort & thermal resistance among 7 combinatins is the outer layer of water proff-vapor permeable & insulating material of 2.1 cm down.

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