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ps6_soln - Massachusetts Institute of Technology DEPARTMENT...

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Massachusetts Institute of Technology DEPARTMENT OF MECHANICAL ENGINEERING 2.611/612 SHIP POWER AND PROPULSION Problem Set 6 Solutions 2006 1. Describe the advantages and disadvantages of using a Gas Turbine vs. a Diesel Engine. Advantages in general (not req'd for answer): 1) Fast Start-Up 2) Modular Construction 3) Easy Automation 4) High Reliability and Maintainabilty Vs. Diesel - low efficiency compared to diesel / higher fuel consumption than diesel - requires higher fuel quality - harder to repair underway - higher power density than diesel so frees up space and weight Ref:Woud, p. 137-138 2. Draw a T-S diagram for an intercooled regenerative Brayton Cycle. Label the points and explain, in words, each portion of the cycle. Mark on your diagram the area where heat is transferred into the system and where it leaves the system.
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