1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vlad1618 [11]
3 years ago
8

Flow and Pressure Drop of Gases in Packed Bed. Air at 394.3 K flows through a packed bed of cylinders having a diameter of 0.012

7 m and length the same as the diameter. The bed void fraction is 0.40 and the length of the packed bed is 3.66 m. The air enters the bed at 2.20 atm abs at the rate of 2.45 kg/m2 · s based on the empty cross section of the bed. Calculate the pressure drop of air in the bed.
Ans: Δp = 0.1547 × 105 Pa
Engineering
1 answer:
devlian [24]3 years ago
4 0

The pressure drop of air in the bed is  14.5 kPa.

<u>Explanation:</u>

To calculate Re:

R e=\frac{1}{1-\varepsilon} \frac{\rho q d_{p}}{\mu}

From the tables air property

\mu_{394 k}=2.27 \times 10^{-5}

Ideal gas law is used to calculate the density:

ρ = \frac{2.2}{2.83 \times 10^{-3} \times 394.3}

ρ = 1.97 Kg / m^{3}

ρ = \frac{P}{RT}

R = \frac{R_{c} }{M} = 8.2 × 10^{-5} / 28.97×10^{-3}

R = 2.83 × 10^{-3} m^{3} atm / K Kg

q is expressed in the unit m/s

q=\frac{2.45}{1.97}

q = 1.24 m/s

Re = \frac{1}{1-0.4} \frac{1.97 \times 1.24 \times 0.0127}{2.27 \times 10^{-5}}

Re = 2278

The Ergun equation is used when Re > 10,

\frac{\Delta P}{L}=\frac{180 \mu}{d_{p}^{2}} \frac{(1-\varepsilon)^{2}}{\varepsilon^{3}} q+\frac{7}{4} \frac{\rho}{d_{p}} \frac{(1-\varepsilon)}{\varepsilon^{3}} q^{2}

\frac{\Delta P}{L}=\frac{180 \times 2.27 \times 10^{-5}}{0.0127^{2}} \frac{(1-0.4)^{2}}{0.4^{3}} 1.24 +\frac{7}{4} \frac{1.97}{0.0127} \frac{(1-0.4)}{0.4^{3}} 1.24^{2}

= 4089.748 Pa/m

ΔP = 4089.748 × 3.66

ΔP = 14.5 kPa

You might be interested in
Convert the unit Decimeter (dm) into Micrometer (um).
oksian1 [2.3K]

Answer:

86701 Micrometers.

Explanation:

Multiply 0.86701 dm by 100,000 to get 86701 um.

7 0
3 years ago
A vertical cylinder (Fig. P3.227) has a 61.18-kg piston locked with a pin, trapping 10 L of R-410a at 10◦C with 90% quality insi
Whitepunk [10]

Hey! How are you? My name is Maria, 19 years old. Yesterday broke up with a guy, looking for casual sex.

Write me here and I will give you my phone number - *pofsex.com*

My nickname - Lovely

4 0
2 years ago
What is the fastest motorcycle in the world ?
givi [52]

Answer:

Kawasaki Ninja H2R – top speed: 222 mph. This one is another beast in the form of a bike. ...

MTT Turbine Superbike Y2K – top speed: 227 mph. This bike is one of the most powerful production motorcycles. ...

Suzuki Hayabusa – top speed: 248 mph. 1340cc

8 0
3 years ago
Read 2 more answers
Its been days wsgggggg
Nataly [62]

Answer: ok

Explanation:

4 0
2 years ago
Read 2 more answers
When block C is in position xC = 0.8 m, its speed is 1.5 m/s to the right. Find the velocity of block A at this instant. Note th
Amanda [17]

Answer:

The answer is "2 m/s".

Explanation:

The triangle from of the right angle:

\to (x_c-0.8)+(1.5+y_4) +\sqrt{x_c^2 + 1.5^2}= constant

Differentiating the above equation:

\to V_c +V_A+ \frac{X_cV_c}{\sqrt{x_c^2 +1}}=0\\\\\to 1-V_A+ \frac{0.8 \times 1.5}{\sqrt{ 0.8^2+1.5}}=0\\\\

\to V_A=  \frac{1.2}{\sqrt{ 0.64+1.5}}+1\\\\

        = \frac{1.2}{ 1.46}+1\\\\= \frac{1.2+ 1.46}{ 1.46}\\\\ = \frac{2.66}{1.46}\\\\= 1.82 \ \frac{m}{s}\\\\= 2 \ \frac{m}{s}

3 0
2 years ago
Other questions:
  • A satellite orbits the Earth every 2 hours at an average distance from the Earth's centre of 8000km. (i) What is the average ang
    7·1 answer
  • What are the challenges posed by strategic information systems, and how should they be addressed?
    10·1 answer
  • Block B starts from rest, block A moves with a constant acceleration, and slider block C moves to the right with a constant acce
    11·1 answer
  • The density of a certain material is such that it weighs 9 pounds per cubic foot of
    10·1 answer
  • Adore.aaliyah_ add me loves !
    7·1 answer
  • Write a program that uses while loops to perform the following steps: Step a: Prompt the user to input two integers: firstNum an
    12·1 answer
  • - If you overload the rear portion of you vehicle &amp; it's raining out, your car could easily:
    14·1 answer
  • What is the name for a program based on the way your brain works?
    13·2 answers
  • if you help then I will thank u by sooo much I will give tons of points but the answer has to be right.
    14·2 answers
  • For a nozzle-duct system shown in Fig Q3, the nozzle is designed to produce a Mach number of 2.8 with y = 1.4, The inlet conditi
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!