If you want to obtain a Class E license before you turn 18, you must______. A. be in compliance with school attendance requireme
1 answer:
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Answer:
Q= 4.6 × 10⁻³ m³/s
actual velocity will be equal to 8.39 m/s
Explanation:
density of fluid = 900 kg/m³
d₁ = 0.025 m
d₂ = 0.05 m
Δ P = -40 k N/m²
C v = 0.89
using energy equation
under ideal condition v₁² = 0
v₂² = 88.88
v₂ = 9.43 m/s
hence discharge at downstream will be
Q = Av
Q =
Q =
Q= 4.6 × 10⁻³ m³/s
we know that
hence , actual velocity will be equal to 8.39 m/s
Answer:
(a) the mass flow rate of air is 5.351 kg/s
(b) the input power required is 2090.786 kW
Explanation:
Given;
initial pressure, P₁ = 100 kPa
initial temperature, T₁ = 20 °C
Final pressure, P₂ = 1.8 MPa
Final temperature, T₂ = 400 °C
Inlet area of the compressor = 0.15 m²
outlet area of compressor = 0.078 m²
velocity of air = 30 m/s
Part (a) mass flow rate of air through the inlet
Mass flow rate = Area x velocity = density x volumetric rate
m = Av = ρV
from ideal gas law, PV = nRT and ρ = m/V
substitute these values in the above equations, we will have;
Part (b) the required power input
where;
W is the input power
m is the mass flow rate
h₁ is the initial enthalpy
h₂ is the final enthalpy
initial and final enthalpy are obtained from steam table using interpolation;
h₁ = 293.166 kJ
h₂ = 684.344 kJ
Answer:
Total saving would be of 36.917 $\yr
Explanation:
Given Data:
Degree F
Degree F
A = 30 ft^2
%
Heat loss before previous final value
= 360 Btu/hr
Heat loss after new value
saving would be
= 616.1782 kw hr/yr
$
= 36.917 $\yr