| The article studies the role of layers in heating service to optimize the thermal conductivity and thermal performance,thereby reducing the energy consumption of batteries.We first select ultra-high molecular weight polyethylene fabric with high thermal conductivity and graphene insitu polymerized nylon 6 fabric,and use this as raw material to weave different yarn types,yarn fineness,fabric structure and fabric density by controlled variable method.The swatches were used to study the effect of structural parameters on the thermal conductivity of thermally conductive fabrics.The results show that the fiber raw materials have a certain influence on the heat conduction of the fabric,and the heat conduction performance of the graphene in-situ polymerized of nylon 6 fabric and the ultra-high molecular weight polyethylene fabric is very good.And the thicker the yarn,the denser the fabric,and the less the number of interlacings,the better the heat conduction.Therefore,an ultrahigh molecular weight polyethylene fabric or a graphene in-situ polymerized nylon 6 fabric with a relatively thick yarn,a high fabric density,a satin texture can be selected as the heat conductive layer of the electric heating service.Secondly,by comparing the thermal conductivity of a aerogel single-faced sanded fabric and a plain cotton fabric purchased on the market.It can be seen that the thermal conductivity of aerogel fabric is only 0.0415W/m·℃,while the thermal conductivity of the ordinary cotton knitted fabric is 0.0647W/m·℃.It shows that the aerogel fabric has better thermal insulation effect and can be used as the thermal insulation layer of the heating service to prevent the loss of heat.In addition,by coating the metal foil layer on the aerogel fabric through the cloth bronzing process,the loss of infrared radiation can be reduced,and the infrared reflectivity of the fabric can be improved.By designing the metal layer pattern,the air permeability of the fabric is improved.The position of the two layers is also determined by comparing the thermal conductivity and infrared reflectivity of the different coated faces.It is concluded that when the non-abrasive finish is applied and the coating is facing outward,the thermal conductivity is the lowest and the infrared reflectance is the highest.Finally,by taking the infrared thermography image of each layer of fabric,the effects of heat conduction layer,thermal insulation layer and infrared reflection layer in the heating service were compared.And infrared thermography was compared with the wear of ordinary T-shirts and the combined heating service of each layer on the back of the experimenter.In addition,This paper designs the fabric combination of the heating service.The outer layer of the heating service is made of the commercially available vest,the lining fabric is aerogel fabric coated with metal aluminum dots,and the edge of which is velcro for easy disassembly and daily cleaning of the vest.Inside the lining,a pocket is placed on the chest,abdomen,back,and waist for placing the heating sheet,and the pocket fabric is a satin structure of ultra high molecular weight polyethylene fabric.A pocket is provided at the front end of the vest,and a power source is provided to heat the graphene heating sheet of each part.The result shows that by optimizing the materials and layers of the heating service,the generated heat can be transferred to a larger area as much as possible,and the loss of heat is prevented,which will help the optimization and development of heating service. |
PDF Full Text Request