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Downdraft

Calculates the size of the cold race from a cold surface and whether the convection from the radiator is sufficient.

Downdraft

Input Result
Temperature room Tr= °C
Temperature surface Ty= °C
Height surface hyta= m
Width surface byta= m
Temperature radiator Trad= °C
Height radiator hyta= m
Width radiator brad= m
Velocity downdraft vkall= m/s
Flow downdraft qkall= m/s
Velocity radiator vrad= m/s
Flow radiator qrad= m/s
Downdraft lifted

Velocity

Input Result
Temperature room Tr= °C °C
Temperature surface Ty= °C °C
Höjd surface h= m m
Velocity downdraft v= m/s m/s

Flow

Input Result
Temperature room Tr= °C °C
Temperature surface Ty= °C °C
Height surface h= m m
Width surface b= m m
Flow downdraft q=

Explanations

Height surface

Refers to the height of the cold surface to be calculated.

Height radiator

Refers to the height of the radiator under the cold surface.

Temperature room

Refers to temperature in the room in question.

Temperature surface

Is the temperature of the surface that creates by the downdraft.

Temperature radiator

Refers to the average temperature of the radiator to cancel by the downdraft.

Width surface

Refers to the width of the cold surface to be calculated.

Width radiator

Refers to the width of the radiator under the cold surface.

Flow downdraft

The air flow created by the downdraft.

Flow radiator

The air flow created by the convection in the radiator.

Velocity downdraft

Refers to the velocity of the falling air from the cold surface.

Velocity radiator

Refers to the velocity of rising air from the radiator.

Formula

Velocity: Velocity
Flow: Flow
Impulse: Impulse