Exposure to high concentrations of gaseous ammonia can cause lung damage. To prevent gaseous ammonia from leaking out, ammonia is transported in its liquid state page 232 through a pipe ( k = 25 W/m .K, D i =25 cm, D o =4 cm and L= 10 m) . and Since liquid ammonia has a normal boiling point of -33.3°C, the pipe needs to be properly insulated to prevent the surrounding heat from causing the ammonia to boil. The pipe is situated in a laboratory, where the average ambient air temperature is 20°C. The convection heat transfer coefficients of the liquid anunonia and the ambient air are 100 Wm2K and 20 Vin2K. respectively. Determine the insulation thickness for the pipe using a material with k = 0 .75W/m 2 .K, to keep the liquid ammonia flowing at an average temperature of -35°C, while maintaining the insulated pipe outer surface temperature at 10°C.
Exposure to high concentrations of gaseous ammonia can cause lung damage. To prevent gaseous ammonia from leaking out, ammonia is transported in its liquid state page 232 through a pipe ( k = 25 W/m .K, D i =25 cm, D o =4 cm and L= 10 m) . and Since liquid ammonia has a normal boiling point of -33.3°C, the pipe needs to be properly insulated to prevent the surrounding heat from causing the ammonia to boil. The pipe is situated in a laboratory, where the average ambient air temperature is 20°C. The convection heat transfer coefficients of the liquid anunonia and the ambient air are 100 Wm2K and 20 Vin2K. respectively. Determine the insulation thickness for the pipe using a material with k = 0 .75W/m 2 .K, to keep the liquid ammonia flowing at an average temperature of -35°C, while maintaining the insulated pipe outer surface temperature at 10°C.
Solution Summary: The author analyzes the thermal resistances of different layers by solving for the insulation thermal conductivity yields kins = 0.75 W/m-K.
Exposure to high concentrations of gaseous ammonia can cause lung damage. To prevent gaseous ammonia from leaking out, ammonia is transported in its liquid state page 232 through a pipe
(
k
=
25
W/m
.K,
D
i
=25 cm, D
o
=4 cm and L= 10 m)
.
and Since liquid ammonia has a normal boiling point of -33.3°C, the pipe needs to be properly insulated to prevent the surrounding heat from causing the ammonia to boil. The pipe is situated in a laboratory, where the average ambient air temperature is 20°C. The convection heat transfer coefficients of the liquid anunonia and the ambient air are 100 Wm2K and 20 Vin2K. respectively. Determine the insulation thickness for the pipe using a material with
k = 0
.75W/m
2
.K,
to keep the liquid ammonia flowing at an average temperature of -35°C, while maintaining the insulated pipe outer surface temperature at 10°C.
This is an old practice exam. Fce = 110lb and FBCD = 62 lb but why
Quiz/An eccentrically loaded bracket is welded to the support as shown in Figure below. The load is static. The weld size
for weld w1 is h1 = 4mm, for w2 h2 = 6mm, and for w3 is h3 =6.5 mm. Determine the safety factor (S.f) for the welds.
F=29 kN. Use an AWS Electrode type (E100xx).
163 mm
S
133 mm
140 mm
Please solve the question above
I solved the question but I'm sure the answer is wrong
the link :
https://drive.google.com/file/d/1w5UD2EPDiaKSx3W33aj
Rv0olChuXtrQx/view?usp=sharing
Q2: (15 Marks)
A water-LiBr vapor absorption system incorporates a heat exchanger as shown in
the figure. The temperatures of the evaporator, the absorber, the condenser, and the
generator are 10°C, 25°C, 40°C, and 100°C respectively. The strong liquid leaving
the pump is heated to 50°C in the heat exchanger. The refrigerant flow rate through
the condenser is 0.12 kg/s. Calculate (i) the heat rejected in the absorber, and (ii) the
COP of the cycle.
Yo 8
XE-V
lo
9
Pc
7
condenser
5
Qgen
PG
100
Qabs
Pe
evaporator
PRV
6
PA
10
3
generator
heat exchanger
2
pump
185
absorber
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.