Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 2, Problem 17P
To determine
The deep body temperature of the healthy person in Kelvin.
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Steam enters the high-pressure turbine of a steam power plant that operates on the ideal reheat Rankine cycle at 700 psia and 900°F and leaves as saturated vapor. Steam is then reheated to 800°F before it expands to a pressure of 1 psia. Heat is transferred to the steam in the boiler at a rate of 6 × 104 Btu/s. Steam is cooled in the condenser by the cooling water from a nearby river, which enters the condenser at 45°F. Use steam tables.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Determine the pressure at which reheating takes place. Use steam tables.
Find:
The reheat pressure is psia. (P4)Find thermal efficiencyFind m dot
Air at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects
Determine mass flow rate of the moist air entering at state 2, in kg/min
Determine the relative humidity of the exiting stream.
Determine the rate of entropy production, in kJ/min.K
Air at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects
Determine mass flow rate of the moist air entering at state 2, in kg/min
Determine the relative humidity of the exiting stream.
Determine the rate of entropy production, in kJ/min.K
Chapter 2 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 2 - Prob. 1PCh. 2 - You are trying to understand how a reciprocating...Ch. 2 - A can of soft drink at room temperature is put...Ch. 2 - What is the difference between intensive and...Ch. 2 - Is the weight of a system an extensive or...Ch. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - What is specific gravity? How is it related to...Ch. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Consider two closed systems A and B. System A...Ch. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - The temperature of ambient air in a certain...Ch. 2 - Prob. 22PCh. 2 - Explain why some people experience nose bleeding...Ch. 2 - A health magazine reported that physicians...Ch. 2 - Someone claims that the absolute pressure in a...Ch. 2 - Express Pascal’s law, and give a real-world...Ch. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - The pressure in a water line is 1500 kPa. What is...Ch. 2 - Prob. 31PCh. 2 - A manometer is used to measure the air pressure in...Ch. 2 - The water in a tank is pressurized by air, and the...Ch. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - The gage pressure in a liquid at a depth of 3 m is...Ch. 2 - The absolute pressure in water at a depth of 9 m...Ch. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40PCh. 2 - Prob. 41PCh. 2 - Prob. 42PCh. 2 - Prob. 44PCh. 2 - Prob. 45PCh. 2 - Reconsider Prob. 2–45. Using an appropriate...Ch. 2 - Both a gage and a manometer are attached to a gas...Ch. 2 - Prob. 48PCh. 2 - A manometer containing oil (ρ = 850 kg/m3) is...Ch. 2 - A mercury manometer (ρ = 13,600 kg/m3) is...Ch. 2 - Repeat Prob. 2–50 for a differential mercury...Ch. 2 - The pressure in a natural gas pipeline is measured...Ch. 2 - Prob. 53PCh. 2 - Prob. 54PCh. 2 - The maximum blood pressure in the upper arm of a...Ch. 2 - Prob. 56PCh. 2 - Prob. 57PCh. 2 - Prob. 58PCh. 2 - Prob. 59PCh. 2 - Prob. 60PCh. 2 - Prob. 61PCh. 2 - Prob. 62PCh. 2 - Prob. 63PCh. 2 - Prob. 64PCh. 2 - Prob. 65RQCh. 2 - Prob. 66RQCh. 2 - Prob. 67RQCh. 2 - Prob. 68RQCh. 2 - Prob. 69RQCh. 2 - Joe Smith, an old-fashioned engineering student,...Ch. 2 - It is well-known that cold air feels much colder...Ch. 2 - Prob. 72RQCh. 2 - A vertical piston–cylinder device contains a gas...Ch. 2 - Prob. 74RQCh. 2 - Prob. 75RQCh. 2 - Prob. 76RQCh. 2 - Prob. 77RQCh. 2 - Determine the maximum amount of load, in kg, the...Ch. 2 - Prob. 79RQCh. 2 - Prob. 80RQCh. 2 - Prob. 81RQCh. 2 - Prob. 82RQCh. 2 - Prob. 83RQCh. 2 - Prob. 84RQCh. 2 - Prob. 85RQCh. 2 - Prob. 86RQCh. 2 - Prob. 87RQCh. 2 - Prob. 88RQ
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- Air at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects (a) Determine mass flow rate of the moist air entering at state 2, in kg/min (b) Determine the relative humidity of the exiting stream. (c) Determine the rate of entropy production, in kJ/min.Karrow_forwardA simple ideal Brayton cycle operates with air with minimum and maximum temperatures of 27°C and 727°C. It is designed so that the maximum cycle pressure is 2000 kPa and the minimum cycle pressure is 100 kPa. The isentropic efficiencies of the turbine and compressor are 91% and 80%, respectively, and there is a 50 kPa pressure drop across the combustion chamber. Determine the net work produced per unit mass of air each time this cycle is executed and the cycle’s thermal efficiency. Use constant specific heats at room temperature. The properties of air at room temperature are cp = 1.005 kJ/kg·K and k = 1.4. The fluid flow through the cycle is in a clockwise direction from point 1 to 4. Heat Q sub in is given to a component between points 2 and 3 of the cycle. Heat Q sub out is given out by a component between points 1 and 4. An arrow from the turbine labeled as W sub net points to the right. The net work produced per unit mass of air is kJ/kg. The thermal efficiency is %.arrow_forwardSteam enters the high-pressure turbine of a steam power plant that operates on the ideal reheat Rankine cycle at 700 psia and 900°F and leaves as saturated vapor. Steam is then reheated to 800°F before it expands to a pressure of 1 psia. Heat is transferred to the steam in the boiler at a rate of 6 × 104 Btu/s. Steam is cooled in the condenser by the cooling water from a nearby river, which enters the condenser at 45°F. Use steam tables. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the pressure at which reheating takes place. Use steam tables. The reheat pressure is psia.Find thermal efficieny Find m dotarrow_forward
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