Question

Nitrogen flows at steady state through a horizontal, insulated pipe with inside diameter of 38.1 mm. A pressure drop results from flow through a partially opened valve. Just upstream from the valve the pressure is 690kPa, the temperature is 322.15 K(49"C), and the average velocity is 6.09 m s p '. If the pressure just downstream from the valve is 138 kPa, what is the temperature? Assume for nitrogen that P V/ T is constant, Cv = (512) R, and Cp = (712) R. (Values for R are given in App. A.)

Answer 1

Answer:

Thermal expansion and heat transfer affect materials based on a given temperature. Learn how to calculate the rate of heat transfer, discover the importance of understanding thermal expansion, and see an example calculation.

Explanation:

We're given that

P

1

=

100

p

s

i

a

P

2

=

120

p

s

i

a

T

1

=

120

∘

F

V

=

20

f

t

/

s

C

p

=

1.04

B

t

u

/

l

b

−

F