Local clothing thermal properties of typical office ensembles under realistic static and dynamic conditions

Veselá, Stephanie; Psikuta, Agnes; Frijns, Ajh Arjan

doi:10.1007/s00484-018-1625-0

Cited by 27 publications

(29 citation statements)

References 18 publications

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“…More research is needed to validate the relationship or develop new ones based on clothing design, that considers draping, overlap, length and number of the layers, material stiffness, material compressibility etc. The recent studies in the field have started to fill this gap 3 , 5 , 28 ) .…”

Section: Resultsmentioning

confidence: 99%

“…Commonly, these are not evenly distributed over the body surface due to the material choice, clothing design, layering, fit etc. Clothing parameters for body regions can be measured, and the change due to walking and wind can be estimated 2 , 3 , 4 ) . Local values can be used in advanced physiological models for exposure evaluation 5 , 6 ) and as a feedback for clothing manufacturers to improve their products, or for industries to select the clothing provided to their employees.…”

Section: Introductionmentioning

confidence: 99%

“…The standard has earlier not considered much different clothing styles than western clothing, and corrections are commonly based on workwear, while recent publication cover that gap 10 , 11 ) . Also, modern western clothing has been measured and detailed thermal properties have been reported in literature 3 , 12 ) .…”

Section: Introductionmentioning

confidence: 99%

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Validation of ISO 9920 clothing item insulation summation method based on an ambulance personnel clothing system

Kuklane

Toma

2021

Ind Health

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This study aimed to validate the summation methods suggested by ISO 9920. Twenty seven items from an ambulance personnel clothing system were selected for testing. The basic insulation of each garment item ( I clu ) was calculated based on the thermal manikin tests. More than 100 realistic clothing combinations were compiled and basic insulation ( I cl ) of these ensembles was calculated according to ISO 9920. These were ranked after the calculated insulation, and 14 sets covering insulation from 0.63 to 3.33 clo were measured on the thermal manikin for acquiring the basic clothing insulation ( I cl ). Regression analysis was used to compare the summed and measured I cl values. The difference between values varied from −18 to 12%. The highest percentual difference was for the lightest clothing sets, while the absolute differences were similar over the whole insulation range ranging between −0.17 to 0.18 clo with an average difference of 0.02 clo (−0.16%). All basic insulation values stayed very close to the line of identity (R 2 =0.98). The summation equation gave, in the case of this ambulance clothing system, very close results to the measured values. This encourages evaluating and selecting protective clothing combinations for thermal comfort based on individual item measurements.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Validation of ISO 9920 clothing item insulation summation method based on an ambulance personnel clothing system

Kuklane

Toma

2021

Ind Health

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“…The local clothing area factor ( ) indicates the increase in surface area of heat loss by adding clothing. In both conditions, thermal insulation of the air layer around the manikin ( ) should be divided by of the outer layer of the ensemble (i.e., BDU) to account for this increase (Vesela et al 2018 ). of the outer layer of the BDU on the torso was determined by making use of its linear relation with ease allowance (Vesela et al 2018 ).…”

Section: Methodsmentioning

confidence: 99%

Two isothermal challenges yield comparable physiological and subjective responses

et al. 2020

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Purpose Ventilated vests are developed to reduce thermal stress by enhancing convective and evaporative cooling from skin tissue underneath the vest. The purpose of this study is to investigate whether thermal stress is equal when a ventilated vest is worn compared to a no-vest situation with similar dry thermal resistance. Methods Nine healthy males walked on a treadmill (7 km h−1) for 45 min in a desert climate (34 °C, 20% relative humidity) with and without ventilated vest. Gastrointestinal temperature (Tgi), heart rate (HR), and skin temperature (Tsk) were continuously monitored. Local sweat rate (LSR) was assessed two times on six skin locations. Subjective ratings were assessed every 10 min. Results Final Tgi (37.6 ± 0.1 °C for vest and 37.6 ± 0.1 °C for no-vest), HR (133 ± 7 bpm and 133 ± 9 bpm) and mean Tsk (34.8 ± 0.7 °C and 34.9 ± 0.6 °C) were not different between conditions (p ≥ 0.163). Scapula skin temperature (Tscapula) under the vest tended to be lower (baseline to final: ΔTscapula = 0.35 ± 0.37 °C) than without vest (ΔTscapula = 0.74 ± 0.62 °C, p = 0.096). LSR at locations outside the vest did not differ with and without vest (p ≥ 0.271). Likewise, subjective responses did not differ between conditions (χ2 ≥ 0.143). Conclusions We conclude that two systems with similar dry thermal resistance and, therefore, similar required evaporation, resulted in similar thermal stress during paced walking in a hot-dry environment. Local ventilation did not alter the sweating response on locations outside the vest.

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“…measured local clothing properties is advised (from thermal manikin measurements or for ensembles described in literature, e.g., [64]).…”

Section: Validation Examples Outcomementioning

confidence: 99%

Human simulator – A tool for predicting thermal sensation in the built environment

Koelblen

Psikuta

Bogdan

et al. 2018

Building and Environment

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One of the challenges for engineers designing indoor environments is merging the need for energy savings with providing thermally comfortable conditions for the occupants. Since the best way to evaluate thermal comfort, i.e. direct enquiry, is at the same time the most costand time-consuming one, various modelling tools are widely used. However, in order to assess complex heterogeneous environments created by novel building systems, there is a need for more sophisticated and precise tools. In this paper, we present a new human simulator methodology for indoor environmental research, combining three tools to predict thermal sensation, namely, a thermal manikin, a thermoregulation model, and a thermal sensation model. Thanks to the thermoregulation model's control, the thermal manikin is capable of mimicking the thermo-physiological response of a human exposed to chosen environmental conditions, which provides reliable input data for advanced thermal sensation models. Along with presenting this concept, the performance of a commercially available human simulator was demonstrated on five validation examples representing office-like conditions for which thermal sensation was predicted with satisfactory accuracy. Based on the presented results, we discussed the capabilities and limitations of human simulators for indoor environment research such as the benefits of performing measurements directly in the assessed environment with real garments, and the challenges related to the manikin's accuracy. The presented human simulator approach is suitable to apply in the building's design process, as well as the development of new solutions for conditioning indoor spaces, and can support the evaluation of existing buildings.

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Local clothing thermal properties of typical office ensembles under realistic static and dynamic conditions

Cited by 27 publications

References 18 publications

Validation of ISO 9920 clothing item insulation summation method based on an ambulance personnel clothing system

Validation of ISO 9920 clothing item insulation summation method based on an ambulance personnel clothing system

Two isothermal challenges yield comparable physiological and subjective responses

Human simulator – A tool for predicting thermal sensation in the built environment

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