Question

What is the heat flux (W/m^2), due to radiation heat transfer, from a black body if the surface temperature is 1000C? The convection heat transfer coefficient is 55 W/(m^2 C).

Answer 1

Answer:

55000 W/m²

Explanation:

Parameters given:

Surface temperature, T = 1000°C

Hear transfer coefficient, h = 55 W/m²C

Convection heat transfer coefficient is given as:

h = Heat flux/Temperature

Hence, Heat Flux, q, is given as:

q = h * T

q = 55 * 1000 = 55000 W/m²C

Answer 2

Answer:

55000 W/m²

Explanation:

Using

ψ = Hf/θ.................... Equation 1

Where Ψ = convection heat transfer, Hf = heat flux, θ = Surface Temperature

Make Hf the subject of the equation,

Hf = ψθ.................. Equation 2

Given: Ψ = 55 W/m².°C, θ = 1000°C

Substitute into equation 2

Hf = 55(1000)

Hf = 55000 W/m²

Hence the heat flux due to radiation = 55000 W/m²