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
MatroZZZ [7]
4 years ago
7

Saturated steam at 125 kpa is compressed adiabatically in a centrifugal compressor to 700 kpa at the rate of 2.5 kg⋅s−1. the com

pressor efficiency is 78%. what is the power requirement of the compressor and what are the enthalpy and entropy of the steam in its final state
Physics
1 answer:
Tpy6a [65]4 years ago
5 0
M° = 2.5 kg/sec
For saturated steam tables
at p₁ = 125Kpa
hg = h₁ = 2685.2 KJ/kg
SQ = s₁ = 7.2847 KJ/kg-k
for isotopic compression
S₁ = S₂ = 7.2847 KJ/kg-k
at 700Kpa steam with S = 7.2847
h₂ 3051.3 KJ/kg
Compressor efficiency
h =  0.78
0.78 = h₂ - h₁/h₂-h₁
0.78 = h₂-h₁ → 0.78 = 3051.3 - 2685.2/h₂ - 2685.2
h₂ = 3154.6KJ/kg
at 700Kpa with 3154.6 KJ/kg
enthalpy gives
entropy S₂ = 7.4586 KJ/kg-k
Work = m(h₂ - h₁) = 2.5(3154.6 - 2685.2
W = 1173.5KW
You might be interested in
Which law describes the magnetic field in a nonlinear wire? A. Faraday's law B. Gauss's law C. Ohm's law D. Ampère's law
Korolek [52]

Answer:

B. Gauss’s law

Explanation:

Gauss’s law is defined as the act of thinking something carefully, careful thought; meditation; deliberation. consideration acts like filter on the information a person receives, because it allows them to contemplate the implications of something before acting on it.

hope this helped!

7 0
3 years ago
A ball moves along a table at a constant velocity and then rolls off the edge of the table. The forces that should be included i
Len [333]

Answer:

Gravity

Explanation:

When the ball is falling to the ground, it is already detached from the table, so the table does not exert any force on it.

Gravity is always present, therefore it is acting on the ball (acting downward), so it must be included into the free-body diagram. Apart from that, there are no other forces acting on the ball (if we neglect air resistance, which is negligible, and it is not mentioned in the options given), therefore the only force which has to be included in the diagram is gravity.

3 0
3 years ago
Heating water so that it boils is an example of _____.
tino4ka555 [31]
Exothermic because it releases heat.
3 0
3 years ago
Read 2 more answers
Can I apply my homework questions about physic?
docker41 [41]

Answer:

mhm

Explanation:

3 0
4 years ago
Read 2 more answers
A book is sitting on a table at rest. Which of the following best describes the forces acting on the book
ser-zykov [4K]
Gravity is pulling the book towards the center of the earth, and the rebounding effect of the table cancelling out gravity allowing for the book to sit at rest.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which two together represent the maximum penalty for violation of the cigarette contraband trafficking act CCTA?
    10·1 answer
  • How fast a car goes is known as its
    10·1 answer
  • Analyze how friction can be both a positive and negative aspect on our lives
    11·1 answer
  • If in 30 minutes Allex runs to a store that is 4 km away, what is her average speed in km/h? km/h
    12·2 answers
  • Suppose 30.4 mol of krypton is in a rigid box of volume 46 cm3 and is initially at temperature 438.28°C. The gas then undergoes
    7·1 answer
  • Which phrase best describes a bird's skeleton​
    6·2 answers
  • A women weighs 857 N. What is her mass?
    13·2 answers
  • 32g of water at 60°C is poured into 60g of cold water at 15°C, which is contained in a
    10·1 answer
  • A force of 100 N acts on a body and moves at a distance of 2 m in the direction of the force. How much work has been done?
    14·1 answer
  • Conservation of Momentum<br> No one likes you little trolls please send an actual answer
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!