Model Fragment Definition

The most important model fragment definition in this domain theory defines the equations for steady-state steady-flow processes. It applies the first law equations for energy and mass conservation to control volumes.

(defModelFragment steady-state-steady-flow-process 
  :subclass-of (thermal-process) 
  :documentation 
  "the model of a steady flow in steady state employing the first law of 
thermodynamics (Energy conservation) and mass conservation" 
  :quantities 
  ( 
   (power-input-per-mass 
    :documentation 
    "the rate of power input per unit of mass passing through the cv 
associated with the process" 
    :the-*-the-object ("power input per unit mass" "of") 
    :abbreviation "w'in") 
   ) 
  :consequences 
  ( 
   (foreach ?cv (process-cv ?self) 
	    (= (- (heat-rate ?self) (work-rate ?self)) 
	       (+ (- (enthalpy-rate-out ?cv) 
		     (enthalpy-rate-in ?cv)) 
		  (d-pe-rate ?cv) 
		  (d-ke-rate ?cv)))) 

   (foreach ?cv  (process-cv ?self) 
	    (= (Entropy-generation-rate ?self) 
	       (+ (- (entropy-rate-out ?cv) (entropy-rate-in ?cv)) 
		  (- (/ (heat-rate ?self) (heat-transfer-temperature ?self))))
	       )) 
   (foreach ?cv (process-cv ?self) 
	    (= (mass-rate-in ?cv) (mass-rate-out ?cv))) 
   ) 
  )