Calculate the entropy change of the exhaust gas

Assignment Help Chemical Engineering

Reference no: EM131155975

Problem 6.2:

The power generation unit in your plant uses a hot exhaust gas from another process to produce work. The gas enters at 10 bar and 350 °C and exits at 1 bar and 40 °C. The process produces a net amount of work equal to 4,500 J/mol and it exchanges an unknown amount of heat with the surroundings.

a) Determine the amount of heat exchanged with the surroundings. Is this heat absorbed or rejected by the system?

b) Calculate the entropy change of the exhaust gas.

c) As a young and ambitious engineer you seek ways to improve the process. What is the maximum amount of work that you could extract from this system? Assume that the inlet and outlet conditions of the exhaust gas remain the same.

Additional data: Assume the surroundings to be at the constant temperature of 25 °C and the exhaust gas to be ideal with CP = 29.3 J/mol K.

Reference no: EM131155975

Questions Cloud

How your organization could address issues more effectively : Describe how your organization could address the issues more effectively. Describe and assess your organization's experience, if any, with 4PLs ("virtual" logistics service providers [VLSP]).

Identifies and explains the strong points of the managers : Assesses how the overall management teams perform in terms of the four functions of management. Identifies and explains the strong points of the managers.

What is your evaluation of this process : It is further reported that 53% of the heat added during the heating step is rejected during the cooling step. What is your evaluation of this process?

How much will the insurer pay for the loss : A fire damaged one bedroom. The actual cash value of the loss is $10,000. The cost of repairs is $16,000. How much will the insurer pay for the loss?

Calculate the entropy change of the exhaust gas : As a young and ambitious engineer you seek ways to improve the process. What is the maximum amount of work that you could extract from this system? Assume that the inlet and outlet conditions of the exhaust gas remain the same.

Why virtual logistics services are important : Describe, compare and contrast the roles of traditional logistics service providers with the roles of virtual logistics service providers. Demonstrate an in-depth knowledge of why virtual logistics services are important?

What is the temperature of the exit stream : She believes she can extract 1700 kW of work and 220 kW of heat that will be used to boil water at 1 bar. Her process, whose details are yet to be determined, will receive streams A and B as inlet and will have a single outlet stream that will be ..

What is the implied discount rate : If the future value of an annuity due is $25,000 and $24,000 is the future value of an ordinary annuity that is otherwise similar to the annuity due, what is the implied discount rate?

Determine the heat load and the entropy generation : The steam in the previous example is cooled using water at 1 bar, 25 °C. The cooling water emerges at 40 °C at the exit of the heat exchanger. Determine the heat load and the entropy generation. Compare the result with the previous example.

User Account

All Pages