In a three-stage compression system, air enters the first stage at a pressure of 100 kPa...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
In a three-stage compression system, air enters the first stage at a pressure of 100 kPa and a temperature of 20 °C. The exit pressure from the third stage is 6400 kPa. Between stages the air is passed through an intercooler that brings the temperature back to 20 °C. The expression for the work of compression per unit mass in an ideal process is TRT₁ [1-(1)-1)/ where subscript 1 refers to the entering conditions and subscript 2 to the leaving conditions. a) With the intermediate pressures chosen so that the total work of compression is a minimum, what is the minimum work required to compress 1 kg of air, assuming that the compressions are reversible and adiabatic? b) What are the intermediate pressures that result in this minimum work of compression? c) Discuss the relative energy consumption by each compressor and the progression of the pressure through the three compressors. In a three-stage compression system, air enters the first stage at a pressure of 100 kPa and a temperature of 20 °C. The exit pressure from the third stage is 6400 kPa. Between stages the air is passed through an intercooler that brings the temperature back to 20 °C. The expression for the work of compression per unit mass in an ideal process is TRT₁ [1-(1)-1)/ where subscript 1 refers to the entering conditions and subscript 2 to the leaving conditions. a) With the intermediate pressures chosen so that the total work of compression is a minimum, what is the minimum work required to compress 1 kg of air, assuming that the compressions are reversible and adiabatic? b) What are the intermediate pressures that result in this minimum work of compression? c) Discuss the relative energy consumption by each compressor and the progression of the pressure through the three compressors.
Expert Answer:
Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
Posted Date:
Students also viewed these finance questions
-
2.Ronald owns a cronut shop. He undertakes the following activities: a) Repainting the ceiling which was turning yellow due to the baking in the shop. b) Redoing the floor of the shop with tiles. The...
-
Air enters a compressor with a stagnation pressure of 100 kPa and a stagnation temperature of 350C, and it is compressed to a stagnation pressure of 900 kPa. Assuming the compression process to be...
-
How to drive target audience or people of Cineplex to movie theaters? Come up with a campaigns with big idea about Cineplex
-
RajDee Furniture Company (RFC) buys and sells office furniture. The company buys chairs from a manufacturer for $40 per unit. Order costs are $200 per order and there is a lead time of 10 days for...
-
In Exercises the graphs of a function and its derivative ' are shown. Label the graphs as or ' and write a short paragraph stating the criteria you used in making your selection. ++ 432 2 y < H 1 2...
-
What is a cost hierarchy?
-
The Panamerican Transportation Company uses a responsibility reporting system to measure the performance of its three investment centers: Planes, Taxis, and Limos. Segment performance is measured...
-
Find resultant of the force system shown 500 N 1000 N 60 30 45 100 N 200 N
-
Hannah Turnbull manages Elegant Suites, a hotel in a small town 10 miles inland from Florida's beautiful gulf coast. Elegant Suites has a capacity of 320 suites and offers a small, but well managed,...
-
Find the following probabilities based on the standard normal variable Z. (You may find it useful to reference the z table. Round your answers to 4 decimal places.) a. b. C. d. X Answer is not...
-
child pulls a 7 kg toboggan 4 m across level ground with a 10 N force that is 30 above the horizontal. The work done 18 280J 28 J 34.6 J 24.2J
-
A main limitation on the United States ?? ability to enforce the Monroe Doctrine was _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . a . . the continuing presence of British, French, and Spanish...
-
1. Consider a diagonal metric in two dimensions ds = 91(dx)2 + 922(dx) where 911 and 922 are functions of r and 2. (a) Show that the Christoffel symbols are r = K 1 2911 T12 = I 12/2 1 0922 2922 x...
-
An industry is likely to have a low beta if the: Omarket for its goods is highly affected by the market cycle. O number of firms within the industry is fairly constant. Ostream of revenues within...
-
The Second American Party System was based on _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . a . . mass participation b . . favoritism c . . elite families d . . economic struggle
-
A stock just paid a dividend of $2.26. The dividend is expected to grow at 27.43% for two years and then grow at 3.54% thereafter. The required return on the stock is 11.55%. What is the value of the...
-
What are three disadvantages of using the direct write-off method?
-
A 0.5-m3 rigid tank contains refrigerant-134a initially at 160 kPa and 40 percent quality. Heat is now transferred to the refrigerant until the pressure reaches 700 kPa. Determine (a) The mass of the...
-
A wet cooling tower is to cool 60 kg/s of water from 40 to 33oC. Atmospheric air enters the tower at 1 atm with dryand wet-bulb temperatures of 22 and 16oC, respectively, and leaves at 30oC with a...
-
A Carnot cycle is executed in a closed system and uses 0.0025 kg of air as the working fluid. The cycle efficiency is 60 percent, and the lowest temperature in the cycle is 300 K. The pressure at the...
-
Use the Internet to access ConocoPhillips's most recent annual report. a. What evidence do you find that ConocoPhillips continues to rely on present worth analysis in its corporate decision making?...
-
Allister Company uses both debt capital and equity capital to fund new projects. The before-tax cost of debt capital is 12 percent. The cost of equity capital is 10 percent. Allister's effective tax...
-
Use the Internet to access Home Depot's most recent annual report. a. What evidence did you find that Home Depot continues to rely on present worth analysis in its corporate decision making? b. Does...
Study smarter with the SolutionInn App