MSC Software MSCEASY5 Conservation of Energy (pVu) d(pVh)=2(wh).2(wh, ) entering leavin Ing conducted or generated Enthalpy and internal energy rates are practically the same for liquids (For gases, a rigorous formulation uses the definition of enthalpy, h=u-p/r) Since enthalpy is a function of temperature only, it can be replaced with temperature 2=CP12 ~△Pw十HA△T generated conducted EAS103 Fluid Power Systems Advanced Class-Chart 13MSC.Software EAS103 Fluid Power Systems Advanced Class - Chart 13 MSC.EASY5TM Conservation of Energy • Enthalpy and internal energy rates are practically the same for liquids. (For gases, a rigorous formulation uses the definition of enthalpy, h = u - P/r.) • Since enthalpy is a function of temperature only, it can be replaced with temperature: h · 2 T h 2       T · 2 c P T · = = 2 generated conducted Qf DP w  = +HAΔ T ( )  dt d ( ) Vh ( ) whi  ( ) whj -  f = + entering leaving conducted or generated Q dt d Vu