Useful Equations

8 513 1 1 x 1 ua ha a ka hb a 526 1 1 r 1 u

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Unformatted text preview: he 0.16 A2 /A1 = 0.6 velocity after the 0.05 A2 /A1 = 0.8 contraction. 0 A2 /A1 = 1.0 Heat Transfer T1 − T2 T1 − T2 ˙ Q= = (∆x/kA) RW ˙ Q= T1 − T2 (r2 − r1 )/kAm (5.8) (5.13) 1 1 ∆x 1 = + + UA hA A kA hB A (5.26) 1 1 ∆r 1 = + + U Ao hi Ai kAm ho Ao (5.31) ˙ Q = U Ao ( ∆ T ) m (5.32) The logarithmic mean of x and y is defined as: (x − y ) ln(x/y ) Reynolds number, Re Re = v ρD µ Pr = cp µ k Nu = hD k Prandtl number, Pr Nusselt number, Nu General Ideal gas law: P V = nRT 7 Steam Tables Extracts From: Mayhew and Rogers Thermodynamic and Transport Properties of Fluids Notation: h hf hg hfg p ps t ts s sf sg sfg u uf ug v specific enthalpy (kJ/kg) specific enthalpy of saturated water (kJ/kg) specific enthalpy of saturated steam...
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This document was uploaded on 03/26/2014.

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