Carbon nanotube yarn based thermoelectric textiles for harvesting thermal energy and powering electronics
Yuanyuan ZhengQihao ZhangWen‐Long JinYuanyuan JingXinyi ChenXue HanQinye BaoYanping LiuXinhou WangShiren WangYiping QiuChong‐an DiKun Zhang
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Abstract:
We explore the fabric structural effect of thermoelectric textiles on power generation and achieve high power density for practical applications.Keywords:
Thermoelectric generator
Power density
Carbon fibers
In order to make effective use of vegetable fibers and produce cotton spun yarn with novel functional properties, 100% cotton open-end rotor-spun hollow yarn was produced and the stretching process of the yarn was clarified. The results were as follows: (1) In the extending process, as the length of the thicker part of the yarn with the smaller level of twist increased, the thicker part of the yarn became the thinner part of the yarn and a redistribution of the twist level also occurred with the straightening of the coiled structure; (2) In the recovering process, as the length of yarn decreased, the thinner part of yarn with the greater twist level was fixed with the reconstruction of the coiled structure; (3) When the extension of the hollow yarn was greater than the elastic limit of the component yarn, the yarn after recovering had an increased length and/or a slack as residual extension in the original length of yarn; and (4) In terms of both the dividing of yarn extension and the redistributing of yarn twist, the double-coiled structure was superior to the single-coiled one.
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This paper proposes a new method for simulating realistic three-dimensional yarn. Main factors that decide yarn appearance are firstly pointed out through analyzing yarn structure. Secondly, we present a method by using the steps as follows: (1) Building a basic yarn model by means of adopting the NURBS curve to design the yarn cross-sectional shapes and control the centreline of yarn path; (2) Inserting twist effect on the yarn appearance. And then 3DS MAX 2010 is selected to simulate yarn by means of the method described above with the aim to create more realistic geometry for fabrics.
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Abstract Cotton is the most commonly used natural fiber and has a significant contribution to the production of yarn manufacturing. This yarn is subsequently utilized for the production of fabrics, garments, and other textile products. The quality of the end product depends on the selection of an appropriate spinning process and output parameters. Numerous methods and processes are involved in the production of yarn. Ring spinning machine is most commonly used for the production of cotton spun yarn. It is necessary to optimize the process parameters of ring-spun yarn without compromising on quality and production. In this research work; these parameters have been optimized by applying the multiple linear regression analysis. The process parameters (especially spindle speed, twist and yarn diameter) and their effect on yarn quality have been discussed in detail. Total 135 ring-spun yarn samples have been produced under three different levels of spindle speed, twist, and linear density. These yarn samples are categorized as 8 Ne, 16 Ne, and 24 Ne at three different Twist multipliers (3.8, 4.0, and 4.2) and different revolutions per minute of the spindle (9500 rpm, 10500rpm, and 11500 rpm). The models have been designed to predict the quality of ring-spun by utilizing USTER evenness tester data. The Count of yarn, yarn twist, and spindle speed were selected as a predictor. The multiple regression method has been used to find out the relation between the process parameters and yarn quality characteristics. The high values of R 2 (the coefficient of determination) showed the relationships in the prediction model.
Linear density
Process variable
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To study the structure and properties of siro-spun yarn intensively, the spinning process of siro-spun yarn and its speciality are analyzed in this paper. The relationship between yarn and single yarn twists is established. The experimental result verified the relationship between yarn and single yarn twists. Therefore, this expression will be helpful to designing the twists of yarn in engineering practice.
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The yarn property and structure of silk/cotton blended compact yarn as well as the fiber migration and distributing rule in the yarn cross-section are discussed in this paper. The results of tests show that the hairiness of silk/cotton blended compact yarn is reduced remarkably with the yarn strength and evenness improved and the yarn being smooth and compact;the fibers in the yarn are aligned parallel with migrate towards yarn core not distinctly and silk and cotton fibers distributed irregularly in the yarn cross-section.
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Yarn hairiness is usually characterized by the amount of free fibers protruding from the compact yarn body towards the outer yarn surface. Its determining is essential because it influences the post spinning operation and parameters of the textile product. Factors influencing yarn quality, mainly yarn hairiness, are correlated and therefore the conclusions depend on all production conditions. Main aim of this article is to show, how quickly and effectively the statistical methods principal component analysis can be applied to obtain information about similarity of yarn samples behavior and build complex quality criterion for yarn. A set of ring yarns is produced for complex quality analysis. The Zweigle G 567 and Uster Tester 4 are used for yarn hairiness investigation.
Textile
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From the influence of yarn fittings on yarn quality ,this paper analyses and contrasts the experiment results to optimize the technics, enable the yarn eve nness ,and improve the quality index such as yarn hairiness , etc.
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In this paper a reasonable design of the yarn detection passage of capacitance type yarn clearer is put forward based on the analysis of yarn moving characters and the requirements of yarn tension control and of yarn hairiness in cone winding process.It aims at effectively yarn defects clearing and minimized yarn damage.
Tension (geology)
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The limitations in wearable devices are the battery size, weight, and its limited life time. By placing thermoelectric generator (TEG) on human body, wearable devices with micro-power operations can be powered continuously. In this paper, a thermoelectric energy harvesting technique is presented to
Thermoelectric generator
Wearable Technology
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Thermoelectric generator
Power density
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