Constant Temperature Drying Rate Tester: Real-Time Water Evaporation Measurement of Fabrics

Chau, Kam-Hong; Tang, Ka-Po Maggie; Kan, Chi Wai

doi:10.1109/tim.2018.2817400

Cited by 16 publications

(19 citation statements)

References 31 publications

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“…This is consistent with previous results. 53 The drying time decreases from plane to large mesh structures. This illustrates that fabrics with a large mesh structure have the best drying property, followed by samples with a small mesh structure, and the worst drying performance is demonstrated by samples with a plane structure.…”

Section: Resultsmentioning

confidence: 99%

Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Yang

Chen³

et al. 2020

Textile Research Journal

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In this work, nine bi-layer knitted samples with varied knitting structures and made up of different yarn compositions were fabricated, and their thermal comfort properties were investigated. The thermal comfort properties were evaluated by breathability, water transfer properties, thermo-physiology properties and dynamic cooling properties, and their relationship with fabric knitting structure and yarn composition were investigated statistically. It was observed that bi-layer knitted fabrics with meshes at one side had better air permeability, moisture management properties, drying performance, thermo-physiological properties and dynamic cooling function, but lower wicking height than bi-layer knitted fabrics with trim and symmetrical structure (without meshes). The composition of nylon and polyester filaments with varied wettability as outer and inners layer of bi-layer knitted fabrics, respectively, improved the water one-way transport capacity significantly. In particular, bi-layer fabrics with asymmetric structure and made up of yarns with varied hydrophilicity as each layer have excellent moisture management capacity. Moreover, fabrics made up of yarns with finer fibers exhibited better thermal comfort properties.

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Section: Resultsmentioning

confidence: 99%

Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Yang

Chen³

et al. 2020

Textile Research Journal

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“…People profusely sweat during exercising, and evaporation is another fundamental means of heat transfer. The current system cannot measure the evaporative resistance of footwear or drying property of footwear material [36]. However, precise control of the local sweat rate of the foot manikin is challenging since the distribution of sweat glands is uneven throughout the surface of the foot.…”

Section: H Limitations Of the Developed Foot Manikinmentioning

confidence: 99%

Instrumental Evaluation of Dry Heat Loss of Footwear Under Different Activity Levels

Yick

Tang

et al. 2019

IEEE Access

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An extreme microclimate inside footwear contributes to wear discomfort and performance impairment. A thermal foot manikin system was developed to evaluate the thermal insulation of footwear. The uniqueness of this foot manikin is that it utilizes a specially designed all-in-one flexible heating sheet with uneven distribution of resistive wires to achieve a non-uniform gradient temperature distribution along the foot surface. Three flexible heating sheets with different wire distributions were developed to simulate the local skin temperature for different activity levels, suggesting more realistic measures. The heated foot manikin was enclosed by a silicone 'skin' layer, which provides a soft texture. In addition, it was equipped with phalangeal joint and ankle joint for the ease of wearing various types of shoes. The local skin temperature and the power required to heat the foot manikin were recorded. Five types of footwear were compared; the results show that the leather sneaker provides the best thermal insulation performance, whereas the mesh shoe provides the worst thermal insulation performance in walking and running conditions. The findings also reveal that the toe portion is the coolest zone. This paper demonstrated that the measurements from the developed foot manikin are repeatable and versatile, which is useful for optimizing the thermal comfort of the footwear.

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“…Since the water volume is adjusted according to the wicking property of the specimen, the test results are not comparable if the tests are not conducted with the same amount of water. Chau et al (2018) combined weighing method and monitoring temperature change method to measure real-time water evaporation of fabrics. Although the volume of water used in the test was fixed, the wetted area of a specimen depending on the wicking property varied with fabrics.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the water evaporation rate of wet textile materials in a pre-defined environment

Liu

Dai

Hong

2020

IJCST

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Purpose The water evaporation rate (WER) is not only crucial for fabric drying, but also an important parameter affecting cooling from a body wearing sweat wetted clothing. The purpose of this paper is to predict the WERs of wet textile materials in a pre-defined environment. Design/methodology/approach The maximum water evaporation rate (WERmax) from a saturated surface in a pre-defined environment was first predicted based on the Lewis relationship between the evaporative and the convective heat transfer in this paper. The prediction results were validated by the comparisons with experimental measurements in various environments obtained in this paper and reported in the literature. Findings Experiment results show that the ratios of WERs to WERmax are lower than 100 percent but higher than 50 percent, which confirmed that the prediction of WERmax is reliable. The temperature decrease of the wet material surface due to evaporation was considered to account for the difference between measured WERs and the WERmax, and the WER variation among materials. The lower ratios of WERs to WERmax in the higher wind condition were speculated to be due to the greater temperature decrease caused by the increased evaporation. Practical implications It provides a reliable way to obtain both WERmax and WER (WERmax multiplied by a proper ratio), which can be useful in clothing physiological modeling to predict clothing comfort. Originality/value This study contributes to the understanding of the evaporation process of textile materials.

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Constant Temperature Drying Rate Tester: Real-Time Water Evaporation Measurement of Fabrics

Cited by 16 publications

References 31 publications

Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Instrumental Evaluation of Dry Heat Loss of Footwear Under Different Activity Levels

Prediction of the water evaporation rate of wet textile materials in a pre-defined environment

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