091202_rec1

# 091202_rec1 - combustor and two turbines The first turbine...

This preview shows pages 1–2. Sign up to view the full content.

16.050 Thermal Energy Recitation #1 – Fall 2002 Problem 1: A piston/cylinder arrangement contains 1 kg of air. The piston is spring loaded and initially rests on some stops (with the spring uncompressed). A pressure of 300 kPa will just float the piston ( i.e, the spring is still uncompressed). At a volume of 1.5 m 3 and a pressure of 500 kPa the piston is balanced ( i.e , the weight of the piston and the spring force are balanced). The initial state of the air is 100 kPa with a volume of 0.5 m 3 . Heat is now added until a pressure of 400 kPa is reached. Assume air behaves as a perfect gas. a) Find the final volume. b) Find the final temperature. c) Find the work and heat transfer in the process. d) Plot the P-V diagram. Page 1 of 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Problem 2: The core of a certain gas turbine system, as drawn on the board, has a compressor, a
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: combustor, and two turbines. The first turbine, the high pressure turbine, provides the power for the compressor through a coupling shaft. The second turbine provides the net power output of the system. You are given the following system specifications: T t,2 = 300 K (compressor inlet total temperature) T t4 = 1500 K (high pressure turbine max inlet total temperature) T t6 = 500 K (low pressure turbine exit total temperature) r c = 20 (compressor stagnation pressure ratio) m ± = 100 kg/s You may assume that air behaves as a perfect gas with cp=1000 J/kgK in the compressor and cp=1100 J/kgK in the turbines. You may also assume that the compressor is adiabatic and reversible. Find the power output of the low pressure turbine. Page 2 of 2...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern