Termiske egenskaper og prosesser Flashcards

1
Q

Termisk ekspansjon

A

dL = αLdT
dV = βVdT (β=3α)

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2
Q

Konduksjon (Varmeledning)

A

(varmestrømmen I)
I = (dQ/dt) = -kA(dT/dx)

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3
Q

Termisk resistans

A

I = (dT/ Req)
Hvor Req regnes ut som i elektriske kretser)

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4
Q

Stefan Boltzmannslov

A

(Utstrålt effekt)
Pr = εσA(Tˆ4)

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5
Q

Wiens forskyvningslov

A

Bølgelengdetopp
λtopp = a/T (a er konst.)

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