Engineering College

Need help to answer.
ASAP.

Air at a temperature of 150C passes through a heat exchanger at a velocity of 30 m/s where its temperature is raised to 8000C. It then enters a turbine with the same velocity of 30 m/s and expands until the temperature falls to 6500C. On leaving the turbine, the air is taken at a velocity of 60 m/s to a nozzle where it expands until the temperature falls to 5000C. If the air flow rate is 2 kg/s, calculate the following.


(i) Rate of heat transfer to the air in the heat exchanger,


(ii) Power output from the turbine assuming no heat loss, and


(iii) Velocity at exit from the nozzle, assuming no heat loss.



Take the enthalpy of air as h =cpt, where cp is the specific heat equal to 1. 005kJ/kg K and t is the temperature.

Answers

Answer 1

The power output from turbine assuming no heat loss and the velocity at exit from nozzle where Enthalphy h CpT i.e Cp specific heat = 1.005KJ/KgK.

What is meant by velocity?

Velocity is the direction speed of an item in motion as a measure of the rate at which its location is changing as seen from a certain point of view and as measured by a specific unit of time.A particle or object's movement with respect to time is expressed vectorially as velocity.As an alternative, the velocity magnitude can be expressed in centimetres per second (cm/s).Simply said, velocity is the rate of motion of an object in a specific direction. Using an automobile driving north on a highway as an example, or a rocket after it has launched, as an example of speed.

The rate of flow of heat transfer to air exchanger i.e

[tex]w(h1+v^{2} 1/2+Z1g)+Q_{1-2} =w(h2+v2^{2} /2+Z1g)W_{1-2}[/tex]

[tex]Wh_{1} +Q_{1-2} =Wh_{2}[/tex]

[tex]Q_{1-2} =w(h_{1} -h_{2} )[/tex]

[tex]Q_{1-2} =w_{cp} (t_{2} -t_{3} )[/tex]

[tex]Q_{1-2}[/tex] = 2xl.005(8000-150)

[tex]Q_{1-2}[/tex] = 1577.8kgj/s

Velocity at exit from the nozzle, assuming no heat loss.

Given t₁ = 150°C, t₂ = 8000°c

V₁ = 30m/s, V₂ = 30m/s

t₃ = 6500°C , V₃ = 60m/s
[tex]W(v_{2} )^{2} /2+h_{2} )=Wh_{3} + (v3)^{2} /2+Wt[/tex]

[tex](v2^{2}) -(v3^{2}) /2=(h2-h3)=Wt/w[/tex]

[tex](30^{2} -60^{2} )x10^{-3} /2+(1.005)(8000-6500)=Wt/w[/tex]

Wt = 1.506.15xw

Wt = 1506.15x2 = 3012.3kW

the enthalpy of air as h =cpt, where cp is the specific heat equal to 1. 005kJ/kg K and t is the temperature is 3012.3kW

To learn more about velocity refer to

https://brainly.com/question/25749514

#SPJ4

Related Questions

given a string s of characters, a subsequence of s, defined by the indices i 1, i 2, ..., i m , is said to be a repeated subsequence if you can find another sequence of indices j 1, j 2, ..., j m, such that s[i k]

Answers

Answer:

= s[j k] for all 1 <= k <= m.

In other words, a repeated subsequence is a sequence of characters within the original string that appears in the same order at least twice. The indices i1, i2, ..., im refer to the positions of the characters in the original string that make up the repeated subsequence, and the indices j1, j2, ..., jm refer to the positions of the same characters in the second occurrence of the repeated subsequence.

Draw shear Force and bending moment diagram for the beam given below.

Answers

The primary purpose of beams as structural components is to support vertical loads.

What is Force and bending moment?

The highest shear and maximum moment locations, as well as the corresponding magnitudes, should be noted while constructing a beam because there is where the structure is most likely to break.

We must measure the shear force and bending moment at every location along the whole length of the beam in order to identify these important places. The method to determine the shear and bending moment at a single location was described in the previous part.

While this method is helpful, you will need a more potent strategy to determine the shear and moment at every point in the item. A shear and bending moment diagram can be made to do this.

Therefore, The primary purpose of beams as structural components is to support vertical loads.

To learn more about Bending moment, refer to the link:

https://brainly.com/question/30242055

#SPJ1

for his position as a lead mechanic, jeff needs to know when and how to use a 12 millimeter screwdriver and a 14 millimeter screwdriver for a specific task. this requires

Answers

Technical Knowledge is the understanding of the specific tools, techniques, and processes required to complete a task. In this case, Jeff needs to have a thorough understanding of when and how to use a 12 millimeter screwdriver and a 14 millimeter screwdriver for a specific task.

This requires him to have a deep understanding of the tools and techniques require completing the task, as well as the processes involved in using the tools correctly. Jeff must also be able to identify any potential risks or issues that may arise during the task and take steps to mitigate them. Additionally, Jeff must be able to troubleshoot any problems that may arise during the task and take the necessary steps to resolve them. Jeff must also be able to identify any potential safety hazards associated with the task and take steps to ensure that they are addressed. Jeff must be able to provide regular updates to his supervisor on the progress of the task and ensure that any changes or modifications are communicated in a timely manner. Finally, Jeff must be able to provide feedback and advice to his supervisor in order to ensure that the task is completed successfully.

Learn more about  Technical Knowledge here

https://brainly.com/question/25053983

#SPJ4

Other Questions
Criteria of a good language test suppose that the quantity supplied of pizza exceeds the quantity demanded for pizza. we would expect that: g soccer fields vary in size. a large soccer field is 108 meters long and 56 meters wide. what are its dimensions in feet? length ft width ft what are its dimensions in inches? length in width in Which of the following became an area of study for mass media scholars only in the early decades of the previous century? Valerie created a table of a proportional relationship that contains the point (3, - 18). which of the tables below could be Valeries? 10) in the game of scrabble, each player begins by drawing 7 tiles from a bag containing 100 tiles. there are 42 vowels, 56 consonants, and 2 blank tiles in the bag. emma chooses her 7 tiles and is surprised to discover that all of them are vowels. we can use a simulation to see if this result is likely to happen by chance. Part A: State the question of interest using the language of probability. (2 points)Part B: How would you use random digits to imitate one repetition of the process? What variable would you measure? (3 points)Part C: Use digits from a table of random digits or use a calculator to perform one repetition. Submit the list of random digits and indicate those that represent vowels. (3 points)Part D: In 500 repetitions of the simulation, there was one time when all seven tiles were vowels. What conclusion can you draw from this result? (2 points) (10 points true or false: imc calls for centralized messaging so that everything a company says and does communicates a common theme and positioning. Not a man lives on the continent but fully believes that a separation must some time or other finally take place.Which best describes Paines use of figurative language in this excerpt? sources of research problems often come from the interests of the researcher. what of the commonly found sources of research problems? before the industrial revolution, the economy of north america under the colonists was characterized by In 7-10 sentences, explain what theme is represented in your script and how it is made clear for the reader. I have my script if you need it At 25 C and normal atmospheric pressure, the density of air is 1.19 g/L. What is the massof air in kilograms of the air in a room that is 28.0 ft x 32.0 ft x 9.5 ft tall? In both Eastern and Western cultures, appear more __________ anxious about death than ________do.-older adults; younger adults- women; men-religious adults; non-religious adults- people who have trouble with inhibition; people who are good at inhibition.p.652 predation on juvenile salmonids by smallmouth bass and northern pikeminnow in the columbia river near richland, washington Help please I've been stuck on this for so long. At what level of government did the Bill of Rights originally apply?a. The Bill of Rights comprises the first ten amendments to the United States Constitution.b. contains rights designed to guarantee individual liberties, some of which apply to criminal proceedings.c. Many, but not all, criminal law rights apply to the federal government and all state governments.d. all answers are correct You have an Azure subscription that contains a virtual machine named VM1 and a storage account named storage1.You need to ensure that VM1 can access storage1 over the Microsoft backbone.What should you use?Select only one answer.a VPN gatewayA service endpointthe Azure Front Door servicea point to site (P2S) connection The fiction film was the most well received type of motion picture until roughly 1900, when it was supplanted in popularity by the actuality. True or FAlse He says, "The train walii be late," How to solve 3x+30+x=10+2x+5x+2