9th Edition

ISBN: 9781266657610

Author: CENGEL

Publisher: MCG CUSTOM

See similar textbooks

Videos

Textbook Question

Chapter 10.9, Problem 48P

Cold feedwater enters a 200-kPa open feedwater heater of a regenerative Rankine cycle at 70°C with a flow rate of 10 kg/s. Bleed steam is available from the turbine at 200 kPa and 160°C. At what rate must bleed steam be supplied to the open feedwater heater so the feedwater leaves this unit as a saturated liquid?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 10.9, Problem 47P

Chapter 10.9, Problem 49P

Students have asked these similar questions

Consider an ideal reheat-regenerative Rankine cycle whose boiler pressure is at 15 MPaa and a condenser pressure of 10 kPaa. Steam enters the turbine at 550 °C. The first of the two extractions of steam occurs at 6 MPaa and the remainder is reheated until the temperature becomes 500 °C. The second extraction occurs at 1 MPaa and again, the remaining steam is reheated up to 480 °C. If the mass flow rate of the throttled steam is 30 kg/s, determine: the hourly quantities of steam extracted= kg/hr and kg/hr the amount of heat added = BTU/hr the amount of heat rejected = BTU/hr the net work of the cycle = BTU/hr the thermal efficiency of the cycle = %

3) An ideal Rankine cycle with superheat and reheat has steam entering the turbine at 10 MPa and 440 °C. The steam is extracted and sent to the reheater at a pressure of 1.5 MPa, and returns to the turbine at 440 °C. The condenser pressure is 20 kPa. The cycle produces 400 MW of net power. Determine (a) the qualities of steam at (i) high pressure turbine exit, and (ii) low pressure turbine exit (b) the thermal efficiency, in % (c) the rate of heat transfer, into the working fluid as it passes through the boiler, in MW (d) the rate of heat transfer, from the condensing steam as it passes through the condenser, in MW (e) the mass flow rate of the condenser cooling water, in kg/ h, if cooling water enters the condenser at 12 Cand exits at 37 C

A simple Rankine cycle uses water as the working fluid. The boiler operates at 6000 kPa and the condenser at 50 kPa. At the entrance to the turbine, the temperature is 450C. The isentropic efficiency of the turbine is 94 percent, pressure and pump losses are negligible, and the water leaving the condenser is subcooled by 6.3C. The boiler is sized for a mass flow rate of 20 kg/s. Determine the rate at which heat is added in the boiler, the power required to operate the pumps, the net power produced by the cycle, and the thermal efficiency.

Chapter 10 Solutions

THERMODYNAMICS (LL)-W/ACCESS >CUSTOM<

Ch. 10.9 - Why is the Carnot cycle not a realistic model for...Ch. 10.9 - Why is excessive moisture in steam undesirable in...Ch. 10.9 - A steady-flow Carnot cycle uses water as the...Ch. 10.9 - A steady-flow Carnot cycle uses water as the...Ch. 10.9 - Consider a steady-flow Carnot cycle with water as...Ch. 10.9 - Water enters the boiler of a steady-flow Carnot...Ch. 10.9 - What four processes make up the simple ideal...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.