Chapter_1 - Student Study Guide for 5th edition of...

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Student Study Guide for 5 th edition of Thermodynamics by Y. A. Ç engel & M. A. Boles 1-1 Chapter 1-1 Study Guide for Thermodynamics: an Engineering Approach By Michael A. Boles Department of Mechanical and Aerospace Engineering NC State University Raleigh, NC 2795-7910
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Student Study Guide for 5 th edition of Thermodynamics by Y. A. Ç engel & M. A. Boles 1-2 Chapter 1-2 Nomenclature A area (m 2 ) C P specific heat at constant pressure (kJ/(kg K)) C V specific heat at constant volume (kJ/(kg K)) COP coefficient of performance d exact differential E stored energy (kJ) e stored energy per unit mass (kJ/kg) F force (N) g acceleration of gravity ( 9.807 m/s 2 ) H enthalpy (H= U + PV) (kJ) h specific enthalpy (h= u + Pv) (kJ/kg) h convective heat transfer coefficient (W/(m 2 K) K Kelvin degrees k specific heat ratio, C P /C V k 10 3 k t thermal conductivity (W/(m- ° C)) M molecular weight or molar mass (kg/kmol) M 10 6 m mass (kg) N moles (kmol) n polytropic exponent (isentropic process, ideal gas n = k) η isentropic efficiency for turbines, compressors, nozzles η th thermal efficiency (net work done/heat added) P pressure (kPa, MPa, psia, psig) Pa Pascal (N/m 2 ) Q net net heat transfer ( Q in - Q out ) (kJ) q net Q net /m, net heat transfer per unit mass (kJ/kg) R particular gas constant (kJ/(kg K)) R u universal gas constant (= 8.314 kJ/(kmol K) ) S entropy (kJ/K) s specific entropy (kJ/(kg K)) T temperature ( ° C, K, ° F, R) U internal energy (kJ)
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Student Study Guide for 5 th edition of Thermodynamics by Y. A. Ç engel & M. A. Boles 1-3 Chapter 1-3 u specific internal energy (kJ/(kg K)) V volume (m 3 ) ± V volume flow rate (m 3 /s) G V velocity (m/s) v specific volume (m 3 /kg) v molar specific volume (m 3 /kmol) X distance (m) X exergy (kJ) x quality Z elevation (m) W net net work done [( W out - W in ) other + W b ] (kJ) where W b = PdV 1 2 z for closed systems and 0 for control volumes w net W net / m , net work done per unit mass (kJ/kg) W t weight (N) δ inexact differential ε regenerator effectiveness φ relative humidity ρ density (kg/m 3 ) ω humidity ratio Subscripts, superscripts a actual b boundary f saturated liquid state g saturated vapor state fg saturated vapor value minus saturated liquid value gen generation H high temperature HP heat pump L low temperature net net heat added to system or net work done by system other work done by shaft and electrical means P constant pressure
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Student Study Guide for 5 th edition of Thermodynamics by Y. A. Ç engel & M. A. Boles 1-4 Chapter 1-4 REF refrigerator rev reversible s isentropic or constant entropy or reversible, adiabatic sat saturation value v constant volume 1 initial state 2 finial state i inlet state e exit state per unit time REFERENCE Cengel, Yunus A. and Michael A. Boles, Thermodynamics: An Engineering Approach, 5th ed., New York, McGraw-Hill: 2006.
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Student Study Guide for 5 th edition of Thermodynamics by Y. A. Ç engel & M. A. Boles 1-5 Chapter 1-5 Chapter 1: Introduction and Basic Concepts INTRODUCTION The study of thermodynamics is concerned with the ways energy is stored
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Chapter_1 - Student Study Guide for 5th edition of...

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