Chapter01 Introduction and Basic Concepts

Basic Concepts of Thermodynamics
of 33
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
  1 Chapter 1 Introduction and Basic Concepts   Study Guide in PowerPoint to accompany Thermodynamics: An Engineering Approach, 6th edition by Yunus A. Çengel and Michael A. Boles    2 Nomenclature ã  A  area (m 2 )   ã C  P   specific heat at constant pressure (kJ/(kg  K))   ã C  V   specific heat at constant volume (kJ/(kg  K)) ã COP coefficient of performance   ã d   exact differential   ã E   stored energy (kJ)   ã e  stored energy per unit mass (kJ/kg)   ã F   force (N)   ã g   acceleration of gravity ( 9.807 m/s 2 )   ã H   enthalpy (H= U + PV) (kJ)   ã h  specific enthalpy (h= u + Pv) (kJ/kg)   ã h  convective heat transfer coefficient (W/(m 2  K) ã K Kelvin degrees   ã k   specific heat ratio, C P  /C V ã k 10 3 ã k  t   thermal conductivity (W/(m-  C))   ã M   molecular weight or molar mass (kg/kmol) ã M 10 6 ã m  mass (kg) ã N   moles (kmol)   ã n  polytropic exponent (isentropic process, ideal gas n = k) ã    isentropic efficiency for turbines, compressors, nozzles ã   th  thermal efficiency (net work done/heat added)   ã P   pressure (kPa, MPa, psia, psig) ã Pa Pascal (N/m 2 )    3 ã  X   distance (m)   ã  X   exergy (kJ)   ã  x   quality   ã Z   elevation (m)   ã W  net  net work done [(  W  out  -  W  in ) other   + W  b ] (kJ) where W  b  = for closed systems and 0 for control volumes   ã w  net   W  net  / m , net work done per unit mass (kJ/kg)   ã W  t weight (N) ã δ   inexact differential ã    regenerator effectiveness ã ϕ   relative humidity ã    density (kg/m 3 ) ã    humidity ratio ã Q net  net heat transfer (  Q in  -  Q out ) (kJ)   ã q net  Q net  /m, net heat transfer per unit mass (kJ/kg)   ã R   particular gas constant (kJ/(kg  K))   ã R  u  universal gas constant (= 8.314 kJ/(kmol  K) )   ã S  entropy (kJ/K)   ã s  specific entropy (kJ/(kg  K))   ã T   temperature (  C, K,  F, R)   ã U   internal energy (kJ)   ã u  specific internal energy (kJ/(kg  K))   ã V   volume (m 3  ) ã  volume flow rate (m 3 /s) ã  velocity (m/s)   ã v   specific volume (m 3 /kg) ã  molar specific volume (m 3 /kmol) Nomenclature con’t    V     V  v  4 Subscripts, superscripts ã  A actual   ã B boundary   ã F saturated liquid state   ã G saturated vapor state   ã fg saturated vapor value minus saturated liquid value ã gen generation   ã H high temperature ã HP heat pump   ã L  low temperature ã net net heat added to system or net work done by system ã other work done by shaft and electrical means   ã P constant pressure ã REF refrigerator ã rev reversible   ã s  isentropic or constant entropy or reversible, adiabatic ã sat saturation value ã v constant volume ã 1 initial state ã 2 finial state   ã i   inlet state   ã e  exit state ã    per unit time
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks