8th Edition

ISBN: 9780100257054

Author: CENGEL

Publisher: YUZU

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In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its m…

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Chapter 8.8, Problem 65P

Refrigerant-22 absorbs heat from a cooled space at 50°F as it flows through an evaporator of a refrigeration system. R-22 enters the evaporator at 10°F at a rate of 0.08 lbm/s with a quality of 0.3 and leaves as a saturated vapor at the same pressure. Determine (a) the rate of cooling provided, in Btu/h, (b) the rate of exergy destruction in the evaporator, and (c) the second-law efficiency of the evaporator. Take T₀ = 77°F. The properties of R-22 at the inlet and exit of the evaporator are: h₁ = 107.5 Btu/lbm, s₁ = 0.2851 Btu/lbm·R, h₂ = 172.1 Btu/lbm, s₂ = 0.4225 Btu/lbm·R.

FIGURE P8–67E

Chapter 8.8, Problem 65P, Refrigerant-22 absorbs heat from a cooled space at 50F as it flows through an evaporator of a

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Chapter 8.8, Problem 64P

Chapter 8.8, Problem 66P

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Solution Summary: The author explains the rate of cooling provided. The mass flow rate is stackreldotm and initial and final specific enthalpy are

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