The Thermal Performance Analysis And Simulation Of Stainless Steel Heating Fabrics

Self-heating clothing can take the initiative to provide heat to the body a nd improve human comfort in the extreme cold environment.It can also provide warmth for elderly rheumatic joint disease,relieve pain,have extensive research and application prospect.The right flexible heating material is the key to making heated clothing.At present,there is a lack of systematic analysis on the heating performance of flexible heating materials,therefore,the subject to meet the service performance of stainless steel yarn-based heating materials,stainless steel yarn and stainless steel yarn design of the heating fabric was studied.This paper first tests the basic thermal properties of stainless steel yarn,mainly: load current,temperature characteristics.The results show that when the current value reached 1.1 A,the surface of the yarn smell;when the current value reaches 1.5 A,the yarn smoke smoke,the current reaches the maximum load,the corresponding voltage at this time 4.1 V;As the current increases,the temperature of the stainle ss steel yarn increases exponentially;In 0.5 A,0.6 A and 0.7 A,three electrical flow,with the increase of current,yarn heats up to the maximum time more and more short,but to minimize maximum temperature from the time there was no significant difference.Secondly,the distribution of stainless steel yarn in fabric is different.Several stainless steel heating fabrics are designed to test the heat transfer distance and temperature distribution.The results show that for the single stainless steel heating fabric,the temperature transfer in the plain base cloth is greater than in the twill base cloth;In the two root stainless steel heating fabric,stainless steel,the area between the two heating tabby fabric and twill fabric heating temperature of maximum and minimum values are the same,but the average temperature heating tabby fabric than heating twill fabric;In the design of the juxtaposed,u-shaped and serrated distribution,the best of the heat transfer is the stainless steel yarn in the form of do uble root and double root on the plain base cloth.Finally,the 3d geometric model of fabric is obtained by using slicing technique.The finite element software was used to simulate the properties of partially heated fabrics;The heat transfer distance of fabric during heating process and the influence of fabric structure and ambient temperature on the heat transfer of fabric under the same conditions were analyzed,the results show that as the ambient temperature increases,the temperature of stainless steel yarn increases,but the difference between inside and outside the yarn temperature remains unchanged,the increase in the value of the same temperature and ambient temperature value;The temperature transfer distance of the plain heating fabric is incre ased with the increase of ambient temperature,which is consistent with the experimental results.The difference between adjacent ambient temperature difference increases with the increase of temperature;When the distance with stainless steel yarn increases,the environment temperature of nodes adjacent temperature difference value increase,the farther the distance with stainless steel yarn,the temperature of the node is influenced by environmental temperature.