ʻO ka pilina ma waena o ka conductivity thermal o ka mea insulation ʻo λ=k/(ρ×c), kahi e hōʻike ai ʻo k i ka conductivity thermal o ka mea, hōʻike ʻo ρ i ka density, a hōʻike ʻo c i ka wela kikoʻī.
1. Ke kumumanaʻo o ka conductivity thermal
I loko o nā mea hoʻokaʻawale, pili ka conductivity thermal i ka hiki o ka wela ma kēlā me kēia wahi i loko o ka mea e hele ma waena o ka mea ma kēlā me kēia manawa, ʻo ia hoʻi, ka helu hoʻoili wela. Hōʻike pinepine ʻia e ke kahe wela ma kēlā me kēia wahi i kēlā me kēia manawa ke ʻokoʻa ka mahana he 1K, a ʻo ke ana he W/(m·K). Pili ka nui o ka hoʻoili wela i ka conductivity thermal a me ka ʻokoʻa mahana o ka mea.
2. ʻO ke ʻano helu o ka conductivity thermal
Pili ka conductivity thermal o ka mea insulation i ka density, ka wela kikoʻī a me ka conductivity thermal o ka mea, a ʻo ka pilina ma waena o lākou: λ=k/(ρ×c).
I waena o lākou, hōʻike ʻo k i ka conductivity thermal o ka mea, ʻo ke anakahi ʻo W/(m·K); hōʻike ʻo ρ i ka density, ʻo ke anakahi ʻo kg/m³; hōʻike ʻo c i ka wela kikoʻī, ʻo ke anakahi ʻo J/(kg·K). Hōʻike kēia haʻilula iā mākou inā makemake mākou e hōʻemi i ka conductivity thermal o ka mea insulation, pono mākou e hōʻemi i ka density, ka mana wela kikoʻī a me ka conductivity thermal o ka mea.
3. Nā mea e pili ana i ka conductivity thermal
Hoʻopilikia ʻia ka conductivity thermal o ka mea insulation e nā kumu he nui, e like me ka mahana, nā waiwai hoʻonohonoho o ka mea (e like me ke ʻano kristal), ka hoʻohui kemika o ka mea, ka launa pū ʻana o ka mea, a me nā mea ʻē aʻe. Eia kekahi, ʻo ka density, ka nui o ka wai, ka porosity a me nā palena ʻē aʻe o ka mea insulation e hoʻopilikia pū i ka conductivity thermal.
Ka manawa hoʻouna: Ian-20-2025
