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
kati45 [8]
4 years ago
8

Air is used as the working fluid in a simple ideal Brayton cycle that has a pressure ratio of 12, a compressor inlet temperature

of 300 K, and a turbine inlet temperature of 1000 K. Determine the required mass flow rate of air for a net power output of 70 MW, assuming both the compressor and the turbine have an isentropic efficiency of (a) 100 percent and (b) 85 percent. Assume constant specific heats at room temperature

Engineering
1 answer:
MissTica4 years ago
6 0

Answer:

Draw the ideal Brayton cycle on the diagram.

Explanation:

Draw the ideal Brayton cycle on the diagram.

See attachment

You might be interested in
A normal shock wave takes place during the flow of air at a Mach number of 1.8. The static pressure and temperature of the air u
Darina [25.2K]

Answer:

The pressure upstream and downstream of a shock wave are related as

\frac{P_{1}}{P_{o}}=\frac{2\gamma M^{2}-(\gamma -1)}{\gamma +1}

where,

\gamma= Specific Heat ratio of air

M = Mach number upstream

We know that \gamma _{air}=1.4

Applying values we get

\frac{P_{1}}{100kPa}=\frac{2\times 1.4\times 1.8^{2}-(1.4 -1)}{1.4 +1}\\\\\frac{P_{1}}{100kPa}=3.61\\\\\therefore P_{1}=361.33kPa(Absloute)

Similarly the temperature downstream is obtained by the relation

\frac{T_{1}}{T_{o}}=\frac{[2\gamma M^{2}-(\gamma -1)][(\gamma -1)M^{2}+2]}{(\gamma +1)^{2}M^{2}}

Applying values we get

\frac{T_{1}}{423}=\frac{[2\times 1.4\times 1.8^{2}-(1.4-1)][(1.4-1)1.8^{2}+2]}{(1.4+1)^{2}\times 1.8^{2}}\\\\\therefore \frac{T_{1}}{423}=1.53\\\\\therefore T_{1}=647.85K=374.85^{o}C

The Mach number downstream is obtained by the relation

M_{d}^{2}=\frac{(\gamma -1)M^{2}+2}{2\gamma M^{2}-(\gamma -1)}\\\\\therefore M_{d}^{2}=\frac{(1.40-1)\times 1.8^{2}+2}{2\times1.4\times 1.8^{2}-(1.4-1)}\\\\\therefore M_{d}^{2}=0.38\\\\M_{d}=0.616

3 0
4 years ago
Please help me I don’t understand
Lapatulllka [165]

Answer:

A battery changes chemical energy to <u>electrical</u> energy

A drum changes mechanical energy to <u>sound</u> energy

Explanation:

A battery is a device that stores chemical energy and converts it to electrical energy.

Beating a drum represents a mechanical to sound energy  conversion.

4 0
3 years ago
Read 2 more answers
Input Energy ---&gt; Output Energy
uranmaximum [27]

Answer:

motion ------> electrical. winds push the turbines which generate a magnetic fields which in turn, generates electricity

4 0
3 years ago
Which of the following uses pressure and flow to transmit power from one location to another?
lord [1]

Answer:

fluid power

Explanation:

fluids commonly used in fluid power are Oil, Water, Air, CO², and Nitrogen gas, fluid power is commonly confused with hydraulic power, which only uses liquids, fluid power uses either liquids or gases

5 0
2 years ago
A 10 kg toddler on a tricycle is sitting at the top of a5 meter high hill. a) What is the toddler's potential energy? b) As the
xz_007 [3.2K]

Answer:

(a) potential energy = 490.5 kg m^{2}/s^{2}

(b) kinetic energy = 500 kg m^{2}/s^{2}

Explanation:

Given data in question

total mass (m)  = 10 kg

total height (h) = 5 m

average velocity = 10 m/s

To find out

potential energy and kinetic energy

Solution

First we calculate potential energy, and we know formula for potential energy is

potential energy = mass × gravity × height

put the value of mass and height and take gravity force = 9.81 m/s^{2}

potential energy = 10 × 9.81 × 5

potential energy = 490.5 kg m^{2}/s^{2}

Now we calculate kinetic energy, and the kinetic energy formula is given below

kinetic energy = 1/2 × mass × velocity²

put the value of mass and velocity

kinetic energy = 1/2 × 10 × 10²

kinetic energy = 500 kg m^{2}/s^{2}

4 0
3 years ago
Other questions:
  • What is the velocity of flow in an asphalt channel that has a hydraulic radius of 3.404 m, length of 200 m and bed slope of 0.00
    5·1 answer
  • 5. Identify the pros and cons of<br> manufactured siding.
    12·1 answer
  • Ayden read 84 pages in 2 hours. At that rate, how many pages can he read in 5 hours
    11·2 answers
  • Looking for new information is one reason you should do research for a speech.
    15·2 answers
  • Once the ideas were narrowed down and divided into categories, the group was split into four smaller teams. What phase(s) of the
    11·1 answer
  • What is a height gage?
    14·1 answer
  • An artist is creating a gigantic mobile using old cars. On one end of the mobile, a 2100 lb Plymoth is suspended 30 feet from th
    8·2 answers
  • The solid rod BC has a diameter of 30 mm and is made of an aluminum for which the allowable shearing stress is 25 MPa. Rod AB is
    15·1 answer
  • What is the optimal temperature for recharging a battery?
    14·1 answer
  • 4) What term describes the movement of electrons from one atom to another? A) Chain reaction B) Energy transfer C) Electricity D
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!