Convection (6, 4)
Equations:
q = h ⋅ A ⋅ T | q = h ⋅ A ⋅ (Th – Tc) |
Example:
Given: Tc= 300_K, A=200_m^2, h=0.005_W/(m^2∗K), q=10_W.
Solution: ΔT=10_°C, Th=36.8500_°C.
Conduction + Convection (6, 5)
If you have fewer than three layers, give the extra layers a zero thickness and any nonzero conductivity. The two temperatures are fluid temperatures – if instead you know a surface temperature, set the corresponding convective coefficient to 10499.
Equations:
q = |
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| q = | A ⋅ (Th – Tc) |
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+ | L1 | + | L2 | + | L3 | + | 1 |
| + | L1 | + | L2 | + | L3 | + | 1 | |||
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| U = |
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| U = | q |
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Example:
Given: ΔT=35_°C, Th=55_°C, A=10_m^2, h1=0.05_W/(m^2∗K), h3=0.05_W/(m^2∗K), L1=3_cm, L2=5_cm, L3=3_cm, k1=0.1_W/ (m∗K), k2=.5_W/ (m∗K), k3=0.1_W/ (m∗K).
Solution: Tc=20_°C, U=0.0246_W/ (m^2∗K), q=8.5995_W.