When charging an R-410A system that uses a water-cooled condenser, you must first charge with vapor to a pressure of at least __
1 answer:
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This question is not complete, the complete question is;
The stagnation chamber of a wind tunnel is connected to a high-pressure air bottle farm which is outside the laboratory building. The two are connected by a long pipe of 4-in inside diameter. If the static pressure ratio between the bottle farm and the stagnation chamber is 10, and the bottle-farm static pressure is 100 atm, how long can the pipe be without choking? Assume adiabatic, subsonic, one-dimensional flow with a friction coefficient of 0.005
Answer:
the length of the pipe is 11583 in or 965.25 ft
Explanation:
Given the data in the question;
Static pressure ratio; p1/p2 = 10
friction coefficient f = 0.005
diameter of pipe, D =4 inch
first we obtain the value from FANN0 FLOW TABLE for pressure ratio of ( p1/p2 = 10 )so
4fL / D = 57.915
we substitute
(4×0.005×L) / 4 = 57.915
0.005L = 57.915
L = 57.915 / 0.005
L = 11583 in
Therefore, the length of the pipe is 11583 in or 965.25 ft
Answer:
a) The slip coefficient is 0.9
b) Blade tip speed is 345.57 m/s
c) Stagnation temperature exiting the impellor is 416.84 k
d) Exit flow velocity is 84.88 m/s
e) Exit flow angle is 76.2°
f) Exit static temperature is 353.84 k
g) Impellor exit Mach number is 0.943
Explanation:
Flow at entry is axial α₁ = 0
Tagential velocity at entry = 0
Blade at exit is radial β₂ = 0
μ₂ =
