Thermodynamics An Engineering Approach 7th. Edition by Yunus A. Cengel, Michael A. Boles | 9780077366742 | Holooly

Thermodynamics An Engineering Approach [EXP-75441]

212 SOLVED PROBLEMS

Question: 2.1

A Car Powered by Nuclear Fuel An average car consumes about 5 L of gasoline a day, and the capacity of the fuel tank of a car is about 50 L. Therefore, a car needs to be refueled once every 10 days. Also, the density of gasoline ranges from 0.68 to 0.78 kg/L, and its lower heating value is about

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A car powered by nuclear energy comes equipped wit...

Question: 6.6

A Carnot Refrigeration Cycle Operating in the Saturation Dome A Carnot refrigeration cycle is executed in a closed system in the saturated liquid-vapor mixture region using 0.8 kg of refrigerant-134a as the working fluid (Fig. 6-52). The maximum and the minimum temperatures in the cycle are 20

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A Carnot refrigeration cycle is executed in a clos...

Question: 9.8

A Gas Turbine with Reheating and Intercooling An ideal gas-turbine cycle with two stages of compression and two stages of expansion has an overall pressure ratio of 8. Air enters each stage of the compressor at 300 K and each stage of the turbine at 1300 K. Determine the back work ratio and the

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An ideal gas-turbine cycle with two stages of comp...

Question: 11.4

A Two -Stage Cascade Refrigeration Cycle Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. Each stage operates on an ideal vapor compression refrigeration cycle with refrigerant-134a as the working fluid. Heat rejection from the lower cycle

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A cascade refrigeration system operating between t...

Question: 11.5

A Two-Stage Refrigeration Cycle with a Flash Chamber Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. The working fluid is refrigerant- 134 a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash

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A two-stage compression refrigeration system opera...

Question: 1.5

Absolute Pressure of a Vacuum Chamber A vacuum gage connected to a chamber reads 5.8 psi at a location where the atmospheric pressure is 14.5 psi. Determine the absolute pressure in the chamber.

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The gage pressure of a vacuum chamber is given. Th...

Question: 2.11

Acceleration of Air by a Fan A fan that consumes 20 W of electric power when operating is claimed to discharge air from a ventilated room at a rate of 1.0 kg/s at a discharge velocity of 8 m/s (Fig. 2-50). Determine if this claim is reasonable.

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A fan is claimed to increase the velocity of air t...

Question: 5.5

Acceleration of Steam in a Nozzle Steam at 250 psia and 700°F steadily enters a nozzle whose inlet area is 0.2 ft^2. The mass flow rate of steam through the nozzle is 10 lbm/s. Steam leaves the nozzle at 200 psia with a velocity of 900 ft/s. Heat losses from the nozzle per unit mass of the steam

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Assumptions 1 This is a steady-flow process since ...

Question: 9.7

Actual Gas-Turbine Cycle with Regeneration Determine the thermal efficiency of the gas-turbine described in Example 9-6 if a regenerator having an effectiveness of 80 percent is installed.

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The gas-turbine discussed in Example 9-6 is equipp...

Question: 15.8

Adiabatic Flame Temperature in Steady Combustion Liquid octane (C8H18) enters the combustion chamber of a gas turbine steadily at 1 atm and 25°C, and it is burned with air that enters the com-bustion chamber at the same state, as shown in Fig. 15-27. Determine the adiabatic flame temperature for

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Liquid ctane is burned steadily. The adiabatic fla...

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