062ee478-4dc1-49a0-ae06-8ff4e8f59b3a 20 Валерий Очков 4 5 false false 0 0 decimal

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The following parameters of a three-layer flat wall are given:
\[REGION[b24577f7df1f45cf8745e4038267de44]]\; \[REGION[6eeceb995db447009f2b1ac3d48b7325]]\; \[REGION[71626329e9d14b4e9028d141ea9acc38]]\; \[REGION[f9f339aafc594f228344bd2cf1a67bd2]]\;
\[REGION[eef72a852bba4ebc93de63cf174fa768]]\; \[REGION[25dabd741ed44c838c65804849880fd2]]\;
\[REGION[a01db55ec7d34f5f8393d1d5855c3382]]\; \[REGION[c7a956ed385040e7a1aff89234a5510f]]\ и \[REGION[ef60f07938774fa880acbcd8f86c7f10]]\. Find \[REGION[c2a973e3931d4a9290f573dd56520f2b]]\.

T.c1 10 °C * :

δ.1 20 mm * :

λ.1 20 W m * m 2^K * / * :

T λ.2 5 0.05 T K / 273.15 - (* + (W m * m 2^K * / * :

δ.3 60 mm * :

λ.3 10 W m * m 2^K * / * :

T.c4 60 °C * :

α.2 18 W m 2^K * / * :

T.ж2 150 °C * :

δ.2

1 (

2 (

q α.2 T.ж2 T.c4 - (* : W m 2^/ 1620

One solution

3 (

δ T.2 a δ 2^* b δ * + c + :

T.c4 T.c3 - δ.3 / λ.3 * q ≡ T.c2 T.c1 - δ.1 / λ.1 * q ≡ δ.1 T.2 T.c2 ≡ δ T.2 δ diff δ δ.1 ≡ at q T.c2 λ.2 / ≡ δ T.2 δ diff δ δ.1 δ.2 + ≡ at q T.c3 λ.2 / ≡ δ.1 δ.2 + T.2 T.c3 ≡ 61 sys T.c2 T.c3 δ.2 a b c 61 sys Solve Assign 284.77 K * 323.43 K * 0.1528 m * 244.2751 K m 2^/ * - 300.0416 K m / * 278.8669 K * 61 sys

δ T T.c1 T.c1 T.c2 - δ.1 / δ * - δ δ.1 ≤ δ T.2 δ δ.1 δ.2 + (≤ T.c3 T.c3 T.c4 - δ.3 / δ δ.1 - δ.2 - (* - cases :

δ.1 mm 20

δ.1 δ.2 + mm 172.8

δ mm * T °C /

T.c3 °C 50.28

8 (

T.c1 °C 10

T.c2 °C 11.62

δ.1 δ.2 + δ.3 + mm 232.8