Mmekọrịta dị n'etiti ihe na-ekpo ọkụ nke okpomọkụ nke ihe mkpuchi bụ λ = k / (ρ × c), ebe k na-anọchite anya ihe na-eme ka ọkụ nke ihe, ρ na-anọchi anya njupụta, na c na-anọchi anya okpomọkụ dị iche iche.
1. Echiche nke thermal conductivity
N'ime ihe mkpuchi mkpuchi, conductivity thermal na-ezo aka n'ikike nke okpomọkụ n'otu mpaghara n'ime ihe na-agafe ihe ọ bụla n'otu oge, ya bụ, ọnụego ọkụ ọkụ. A na-egosipụtakarị ya site na ikpo ọkụ na-ekpo ọkụ n'otu mpaghara kwa nkeji oge mgbe ọdịiche okpomọkụ dị 1K, na unit bụ W / (m·K). Ọnụ ọgụgụ nke ikpo ọkụ ọkụ na-adabere na okpomọkụ na okpomọkụ dị iche nke ihe.
2. Usoro mgbako nke thermal conductivity
Igwe ọkụ ọkụ nke ihe mkpuchi ihe na-ejikọta ya na njupụta, kpọmkwem okpomọkụ na okpomọkụ nke ihe onwunwe, na mmekọrịta dị n'etiti ha bụ: λ = k / (ρ × c).
N'ime ha, k na-anọchite anya conductivity thermal nke ihe, unit bụ W / (m·K); ρ na-anọchi anya njupụta, unit bụ kg/m³; c na-anọchi anya okpomọkụ kpọmkwem, unit bụ J / (kg·K). Usoro a na-agwa anyị na ọ bụrụ na anyị chọrọ ibelata okpomọkụ conductivity nke ihe mkpuchi ihe, anyị kwesịrị ibelata njupụta, kpọmkwem okpomọkụ ike na thermal conductivity nke ihe.
3. Ihe na-emetụta thermal conductivity
A na-emetụta ihe ndị na-eme ka okpomọkụ nke ihe mkpuchi ahụ na-emetụta ọtụtụ ihe, dị ka okpomọkụ, ihe nhazi nke ihe onwunwe (dịka nhazi kristal), ihe mejupụtara kemịkalụ nke ihe, mmekọrịta nke ihe, wdg. Tụkwasị na nke ahụ, njupụta, ọdịnaya mmiri. , porosity na akụkụ ndị ọzọ nke ihe mkpuchi ahụ ga-emetụtakwa conductivity thermal.
Oge nzipu: Jan-20-2025
