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Engineering and Tech / Fundamentals of Engineering Thermodynamics 7 / Chapter 6 / Problem 114P

Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

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Applying the Entropy Balance: Control VolumesAir as an

Chapter 6, Problem 114P

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QUESTION:

Air as an ideal gas flows through the compressor and heat exchanger shown in Fig. P6.114. A separate liquid water stream also flows through the heat exchanger. The data given are for operation at steady state. Stray heat transfer to the surroundings can be neglected, as can all kinetic and potential energy changes. Determine

(a) the compressor power, in kW, and the mass flow rate of the cooling water, in kg/s.

(b) the rates of entropy production, each in kW/K, for the compressor and heat exchanger.

Questions & Answers

QUESTION:

Air as an ideal gas flows through the compressor and heat exchanger shown in Fig. P6.114. A separate liquid water stream also flows through the heat exchanger. The data given are for operation at steady state. Stray heat transfer to the surroundings can be neglected, as can all kinetic and potential energy changes. Determine

(a) the compressor power, in kW, and the mass flow rate of the cooling water, in kg/s.

(b) the rates of entropy production, each in kW/K, for the compressor and heat exchanger.

ANSWER:

Step 1 of 4

We are required to calculate the compressor power, the mass flow rate and the rates of entropy production for both the compressor and heat exchanger.

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