Commiting example dir.

Cantera/python/examples/liquid_vapor/rankine/.cvsignore

@@ -0,0 +1,8 @@
+Makefile
+runtest
+ct2ctml.log
+diff_out_0.txt
+h2o2.xml
+liquidvapor.xml
+output_0.txt
+transport_log.xml

Cantera/python/examples/liquid_vapor/rankine/Makefile.in

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+#!/bin/sh
+
+PYTHON_CMD = @PYTHON_CMD@
+
+run:
+	$(PYTHON_CMD) rankine.py
+
+test:
+	./runtest
+clean:
+	rm -f *.log *.csv *.xml
+	./cleanup
+
+# end of file
+

Cantera/python/examples/liquid_vapor/rankine/cleanup

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+#!/bin/sh
+#
+/bin/rm -rf equilibrate_log*.html
+/bin/rm -rf .cttmp* ct2ctml.log transport_log.xml vcs_equilibrate_res*.csv \
+            catcomb.csv output_0.txt diff*

Cantera/python/examples/liquid_vapor/rankine/output_blessed_0.txt

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+
+
+***************** State 1 ******************
+ 
+  water:
+ 
+       temperature             300  K
+          pressure         3528.21  Pa
+           density         996.589  kg/m^3
+  mean mol. weight          18.016  amu
+    vapor fraction               0 
+ 
+                          1 kg            1 kmol
+                       -----------      ------------
+          enthalpy    -1.58582e+07       -2.857e+08     J
+   internal energy    -1.58582e+07       -2.857e+08     J
+           entropy         3913.28         7.05e+04     J/K
+    Gibbs function    -1.70322e+07       -3.069e+08     J
+ heat capacity c_p     4.06353e+07        7.321e+08     J/K
+ heat capacity c_v         4156.15        7.488e+04     J/K
+ 
+                           X                 Y          Chem. Pot. / RT    
+                     -------------     ------------     ------------
+               H2O              1                1         -123.019
+
+
+***************** State 2 ******************
+ 
+  water:
+ 
+       temperature         300.143  K
+          pressure          800000  Pa
+           density          996.91  kg/m^3
+  mean mol. weight          18.016  amu
+    vapor fraction               0 
+ 
+                          1 kg            1 kmol
+                       -----------      ------------
+          enthalpy    -1.58569e+07       -2.857e+08     J
+   internal energy    -1.58577e+07       -2.857e+08     J
+           entropy         3915.06        7.053e+04     J/K
+    Gibbs function     -1.7032e+07       -3.068e+08     J
+ heat capacity c_p          4178.6        7.528e+04     J/K
+ heat capacity c_v         4127.86        7.437e+04     J/K
+ 
+                           X                 Y          Chem. Pot. / RT    
+                     -------------     ------------     ------------
+               H2O              1                1         -122.959
+
+
+***************** State 3 ******************
+ 
+  water:
+ 
+       temperature         443.624  K
+          pressure          800000  Pa
+           density         4.15875  kg/m^3
+  mean mol. weight          18.016  amu
+    vapor fraction               1 
+ 
+                          1 kg            1 kmol
+                       -----------      ------------
+          enthalpy    -1.32016e+07       -2.378e+08     J
+   internal energy    -1.33939e+07       -2.413e+08     J
+           entropy           10183        1.835e+05     J/K
+    Gibbs function     -1.7719e+07       -3.192e+08     J
+ heat capacity c_p     2.30856e+07        4.159e+08     J/K
+ heat capacity c_v           22595        4.071e+05     J/K
+ 
+                           X                 Y          Chem. Pot. / RT    
+                     -------------     ------------     ------------
+               H2O              1                1         -86.5462
+
+
+***************** State 4 ******************
+ 
+  water:
+ 
+       temperature             300  K
+          pressure         3528.21  Pa
+           density       0.0305583  kg/m^3
+  mean mol. weight          18.016  amu
+    vapor fraction        0.835158 
+ 
+                          1 kg            1 kmol
+                       -----------      ------------
+          enthalpy    -1.38221e+07        -2.49e+08     J
+   internal energy    -1.39376e+07       -2.511e+08     J
+           entropy         10700.2        1.928e+05     J/K
+    Gibbs function    -1.70322e+07       -3.069e+08     J
+ heat capacity c_p     4.06353e+07        7.321e+08     J/K
+ heat capacity c_v          108455        1.954e+06     J/K
+ 
+                           X                 Y          Chem. Pot. / RT    
+                     -------------     ------------     ------------
+               H2O              1                1         -123.019
+efficiency =  0.233208584856

Cantera/python/examples/liquid_vapor/rankine/rankine.py

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+#
+# A Rankine vapor power cycle
+#
+
+from Cantera import *
+from Cantera.liquidvapor import Water
+
+
+########################################################
+#
+# parameters
+#
+
+eta_pump = 0.6     # pump isentropic efficiency
+eta_turbine = 0.8  # turbine isentropic efficiency
+pmax = 8.0e5       # maximum pressure
+
+
+########################################################
+#
+# some useful functions
+#
+
+def pump(fluid, pfinal, eta):
+    """Adiabatically pump a fluid to pressure pfinal, using
+    a pump with isentropic efficiency eta."""
+    h0 = fluid.enthalpy_mass()
+    s0 = fluid.entropy_mass()
+    fluid.set(S = s0, P = pfinal)
+    h1s = fluid.enthalpy_mass()
+    isentropic_work = h1s - h0
+    actual_work = isentropic_work / eta
+    h1 = h0 + actual_work
+    fluid.set(H = h1, P = pfinal)
+    return actual_work
+
+
+def expand(fluid, pfinal, eta):
+    """Adiabatically expand a fluid to pressure pfinal, using
+    a turbine with isentropic efficiency eta."""
+    h0 = fluid.enthalpy_mass()
+    s0 = fluid.entropy_mass()
+    fluid.set(S = s0, P = pfinal)
+    h1s = fluid.enthalpy_mass()
+    isentropic_work = h0 - h1s
+    actual_work = isentropic_work * eta
+    h1 = h0 - actual_work
+    fluid.set(H = h1, P = pfinal)
+    return actual_work
+
+
+def printState(n, fluid):
+    print '\n\n***************** State '+`n`+' ******************\n', fluid
+    
+
+###############################################################
+
+
+# create an object representing water
+w = Water()
+
+# start with saturated liquid water at 300 K
+w.set(T = 300.0, Vapor = 0.0)
+h1 = w.enthalpy_mass()
+p1 = w.pressure()
+printState(1,w)
+
+# pump it adiabatically to pmax
+pump_work = pump(w, pmax, eta_pump)
+h2 = w.enthalpy_mass()
+printState(2,w)
+
+# heat it at constant pressure until it reaches the
+# saturated vapor state at this pressure
+w.set(P = pmax, Vapor = 1.0)
+h3 = w.enthalpy_mass()
+heat_added = h3 - h2
+printState(3,w)
+
+# expand back to p1
+turbine_work = expand(w, p1, eta_turbine)
+printState(4,w)
+
+# efficiency
+eff = (turbine_work - pump_work)/heat_added
+
+print 'efficiency = ',eff
+
+
+
+
+
+
+    

Cantera/python/examples/liquid_vapor/rankine/runtest.in

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+#!/bin/sh
+#
+#
+temp_success="1"
+/bin/rm  -f output_0.txt    diff_csv.txt diff_out_0.txt
+
+##########################################################################
+PYTHON_CMD=@PYTHON_CMD@
+prog=rankine.py
+if test ! -f $prog ; then
+   echo $prog ' does not exist'
+   exit -1
+fi
+#################################################################
+#
+CANTERA_DATA=${CANTERA_DATA:=../../../data/inputs}; export CANTERA_DATA
+CANTERA_BIN=${CANTERA_BIN:=../../../bin}
+
+#################################################################
+
+$PYTHON_CMD $prog  > output_0.txt <<+
+1.0
++
+retnStat=$?
+if [ $retnStat != "0" ]
+then
+  temp_success="0"
+  echo "$prog returned with bad status, $retnStat, check output"
+fi
+
+diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
+retnStat_0=$?
+
+retnTotal=1
+if test $retnStat_0 = "0" 
+then
+  retnTotal=0
+fi
+
+if test $retnTotal = "0"
+then
+  echo "Successful test comparison on "`pwd`
+else
+  echo "Unsuccessful test comparison of txt files on "`pwd` " test"
+  echo "     see diff_outi_0.txt "
+fi
+