Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 29 Sep 2017 My Price 9.00

steel exchange energy

Consider Problem 6.60 if the two blocks of steel exchange energy through a heat engine similar to the setup in Problem 6.74. Find the work output of the heat engine.

Problem 6.60

Two 5-kg blocks of steel, one at 250â—¦C and the other at 25â—¦C, come in thermal contact. Find the final temperature and the change in entropy of the steel.

Problem 6.74

Find the total work the heat engine can give out as it receives energy from the rock bed as, described in Problem 5.60 (see Fig. P6.74). Hint: write the entropy balance equation for the control volume that is the combination of the rock bed and the heat engine.

Problem 5.60

Thermal storage is made with a rock (granite) bed of 2 m3 that is heated to 400 K using solar energy. A heat engine receives a QH from the bed and rejects heat to the ambient at 290 K. The rock bed therefore cools down, and as it reaches 290 K the process stops. Find the energy the rock bed can give out. What is the heat engine efficiency at the beginning of the process and what is it at the end of the process?

 

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Maurice Tutor
(5)
Status NEW Posted 29 Sep 2017 08:09 PM My Price 9.00

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