Conduction

Pages

Overall Heat Transfer Coefficient

Also called U-Factor:

 , where:

U = Overall Heat Transfer Coefficient (W/(m2*K))

R = Thermal Resistance ((m2*K)/W)

Prandtl Number

 , where:

Pr = Prandtl Number

 = Kinematic Viscosity (m^2/s)

 = Thermal Diffusivity (m^2/s)

Thermal Conductivity

 , where:

k = Thermal Conductivity (W/(m*K))

Q = Heat Energy Transferred (J)

t = Time during which Q is transferred (s)

x = Distance from location of heat transfer (m)

A = Cross-sectional area (m2)

T = Change in temperature at point x distance away (K)

Thermal Effusivity

 , where:

e = Thermal Effusivity (J/(K*s.5*m2))

k = Thermal Conductivity (W/(m*K))

 = Density (kg/m3)

cp = Specific Heat Capacity (J/(kg*K))

Thermal Resistance

  , where:

R = Thermal Resistance ((m2*K)/W)

T = Change in Temperature (K)

QA = Heat Flux (W/m2)

Pages