Yuav ua li cas xam koj tus lej?

2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38

U-tus nqi formula U Tus nqi yog qhov sib txuam ntawm txhua qhov kev tawm tsam ntawm cov ntaub ntawv pom hauv lub tsev. Txhawm rau xam tus nqi U-Value ntawm lub tsev caij R-Value ntawm tag nrho cov khoom sib txawv uas tsim los ntawm cov khoom yuav raug txiav txim siab. U-Value (of building element)=1 / (R_so + R_si + R₁ + R₂ …)

qhov rais U-tus nqi xam li cas?

Xaiv U-tus nqi ntawm windows. Heat loss=U x A x dT qhov twg U=U-value (W/m2K)Thermal transmittance A=Thaj tsam ntawm qhov chaw (m2) dT=Kub qhov sib txawv sab hauv mus rau sab nraud (K) Chav nyob ntawm tshav kub poob=Watts.

Koj suav li cas U-tus nqi ntawm ib pem teb?

U=U-Tus nqi ntawm lub tsev tsis muaj insulated (W / m²K).

U-yam ntawm R19 rwb thaiv tsev yog dab tsi?

Cov rwb thaiv tsev ib txwm muaj R tus nqi ntawm 19 thaum lub qhov rais yuav muaj tus nqi U ntawm 0.35.

Yuav ua li cas koj xam k tus nqi ntawm U-tus nqi?

U-tus nqi=ƛ-tus nqi / thickness ntawm cov rwb thaiv tsev

Cov lus ntawm ob daim duab no (tus nqi U) yog li qhia hauv W / m²K, uas sawv cev rau tus naj npawb ntawm Watts (W) ib square meter (/m^{2) ntawm qhov kub sib txawv ntawm 1 degree Kelvin (K).}