(a) Explanation Here, the steam operated at steady state through the two stages of turbine and with reheater circuit between them. At steady state the inlet and exit mass flow rates are equal. m ˙ 1 = m ˙ 2 (I) Write the formula for inlet mass flow rate. m ˙ 1 = A 1 V 1 v 1 (II) Here, the volumetric flow rate is A 1 V 1 and the specific volume is v ; the suffix 1 indicates the inlet state. At inlet: The steam is at superheated state. Refer Table A-4, “Properties of Superheated Water Vapor”. The specific volume ( v 1 ) corresponding to the pressure of 40 bar and the temperature of 500 ° C is 0.08643 m 3 /kg . Conclusion: Substitute 90 m 3 /min for A 1 V 1 and 0 (b) To determine The total power developed by the two stages of turbine, in kW . (c) To determine The rate of heat transfer to the steam flowing through the reheater, in kW .

Fundamentals of Engineering Thermodynamics

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ISBN: 9781118832301

Author: SHAPIRO

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

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Chapter 4.12, Problem 50P

(a)

To determine

The mass flow rate of steam, in kg/h.

(b)

To determine

The total power developed by the two stages of turbine, in kW.

(c)

To determine

The rate of heat transfer to the steam flowing through the reheater, in kW.

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Chapter 4.12, Problem 49P

Chapter 4.12, Problem 51P

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Chapter 4 Solutions

Fundamentals of Engineering Thermodynamics

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The mass flow rate of steam, in kg/h .

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The mass flow rate of steam, in kg/h.

The total power developed by the two stages of turbine, in kW.

The rate of heat transfer to the steam flowing through the reheater, in kW.

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Chapter 4 Solutions