PARAMETER (S)

SPECIFICATION (S)

SI Units

AC resistance of conductor i at temperature Tc

Ω/m

Current through conductor i

A

Solar absorptivity of conductor i

Total solar and sky radiated heat flux rate

W/m2

Effective angle of incidence of sun rays

degrees

Projected area of conductor i per unit length

m2/m

Diameter of conductor i

Mm

Ambient temperature

˚C

Temperature across conductor i

˚C

Max. Conductor (i) temperature

˚C

Min. Conductor (i) temperature

˚C

Density of air

kg/m3

Speed of wind at conductor i

m/s

Thermal conductivity of air at temperature Tfilm

W/(m∙˚C)

Dynamic viscosity of air

Pa∙s

Emissivity of conductor i

Wind direction factor

Angle between wind and conductor axis

Degrees

Film temperature

˚C

Conductor elevation above sea

M