Ubudlelwano phakathi kwe-thermal conductivity yento efakwayo ngu-λ=k/(ρ×c), lapho u-k emele ukuqhutshwa kwe-thermal kwento, u-ρ umele ukuminyana, futhi u-c umele ukushisa okuthile.
1. Umqondo we-thermal conductivity
Kuzinto zokufakelwa kwe-insulation, i-thermal conductivity ibhekisela emandleni okushisa endaweni ngayinye yeyunithi kumpahla ukuze kudlule impahla ngesikhathi seyunithi, okungukuthi, izinga lokudlulisa ukushisa. Ngokuvamile kuvezwa ukugeleza kokushisa endaweni yeyunithi ngayinye ngesikhathi seyunithi lapho umehluko wezinga lokushisa ungu-1K, futhi iyunithi ingu-W/(m·K). Ubukhulu bokushisa kokushisa buncike ekuziphatheni okushisayo kanye nokuhluka kwezinga lokushisa kwezinto.
2. Ifomula yokubala ye-thermal conductivity
I-thermal conductivity ye-insulation material ihlobene nokuminyana, ukushisa okuqondile kanye nokuhanjiswa kwe-thermal kwento, futhi ubudlelwano phakathi kwakho yilokhu: λ=k/(ρ×c).
Phakathi kwazo, u-k umele ukuqhutshwa kwe-thermal kwento, iyunithi ithi W/(m·K); ρ imele ukuminyana, iyunithi ingu-kg/m³; c imele ukushisa okuqondile, iyunithi ithi J/(kg·K). Le fomula isitshela ukuthi uma sifuna ukunciphisa ukuqhutshwa kokushisa kwezinto zokufakelwa, sidinga ukunciphisa ukuminyana, umthamo wokushisa othize kanye ne-thermal conductivity yezinto.
3. Izici ezithinta conductivity ezishisayo
I-conductivity eshisayo yezinto zokufakelwa ithinteka yizici eziningi, njengokushisa, izakhiwo zesakhiwo sezinto ezibonakalayo (njenge-crystal structure), ukwakheka kwamakhemikhali wezinto ezibonakalayo, ukusebenzisana kwempahla, njll. Ngaphezu kwalokho, ukuminyana, okuqukethwe kwamanzi, i-porosity kanye neminye imingcele ye-insulation material izophinde ithinte i-conductivity yokushisa.
Isikhathi sokuthumela: Jan-20-2025
