Question

An average man has a body surface area of 1.8 m2 and a skin temperature of 33c. The convection heat transfer coefficient for a clothed person walking in still air is expressed as h 5 8.6v0.53 for 0.5 , v , 2 m/s, where v is the walking velocity in m/s. Assuming the average surface temperature of the clothed person to be 30c, determine the rate of heat loss from an average man walking in still air at 10c by convection at a walking velocity of (a) 0.5 m/s, (b) 1.0 m/s, (c) 1.5 m/s, and (d) 2.0 m/s.

Answer 1

Answer:

An average man has a body surface area of 1.8 m2 and a skin temperature of 33°C. The convection heat transfer coefficient for a clothed person walking in still air is expressed as h =8.6V0.53 for 0.5 < V < 2 m/s, where V is the walking velocity

Answer 2

Answer:

Mechanism and Types of ConvectionAn average man has a body surface area of 1.8m21.8m

2

and a skin temperature of 33∘C.33

∘

C. The convection heat transfer coefficient for a clothed person walking in still air is expressed as h=8.6V0.53h=8.6V

0.53

for 0.5 < V < 2 m/s, where V is the walking velocity in m/s. Assuming the average surface temperature of the clothed person to be 30∘C,30

∘

C, determine the rate of heat loss from an average man walking in still air at 10∘C10

∘

C by convection at a walking velocity of (a) 0.5 m/s, (b) 1.0 m/s, (c) 1.5 m/s, and (d) 2.0 m/s.