RADIATION HEAT TRANSFER

Radiation heat transfer between surfaces DOES NOT depends on the orientation of the surfaces.

This statement is ______________

• TRUE

• FALSE

1.Defined to account for the effects of orientation on radiation heat transfer between two surfaces.

2.Purely geometric quantity and is independent of the surface properties and temperature.

Statements above best described?

• View factor

• Blackbody

• Emissitivity

• Kirchoff's law

View factor based on the assumption that the surfaces are diffuse emitters and diffuse reflectors.

Statements above is about?

• Reciprocity relation

• Summation rule

• Specular view factor

• Diffuse view factor

View factor based on the assumption that the surfaces are specular reflectors.

Statement above is about?

• Reciprocity relation

• Specular view factor

• Summation rule

• Diffuse view factor

A₁F₁₂=A₂F₂₁

This equation represents?

• The reciprocity relation

• The summation rule

• The superposition rule

• The symmetry rule.

Select fundamental relations for view factors.

• The reciprocity relation

• The summation rule

• The superposition rule

• The symmetry rule.

The sum of the view factors from surface i of an enclosure to all surfaces of the enclosure, including to itself, must equal unity.

Statements above best described?

• The symmetry rule.

• The superposition rule

• The summation rule

• The reciprocity relation

Two (or more) surfaces that possess symmetry about a third surface will have identical view factors from that surface.

Statements above best described?

• The symmetry rule

• The superposition rule

• The summation rule

• The reciprocity relation

The view factor between two-dimensional surfaces can be determined by the simple ________method developed by H. C. Hottel in the 1950s.

• Crossed-Strings Method

• Diffuse view Method

• Crossed-Strings Method

• The symmetry Method

Radiation DOES NOT require the presence of a material medium to take place

This statement is ?

• TRUE

• FALSE

• NOT SURE