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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:2af45763cdabb4c15384bcd3c0f85ef0384f4698a0a51376cf62b1a662fc76dc"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter10-Availbility,exergy and irreversibilitiy"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example1-pg 180"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate work of the water and heat interaction of the water and aximum work done\n",
+      "##initialisation of variables\n",
+      "m= 2 ##kg\n",
+      "p= 200 ##kPa\n",
+      "v2= 0.9596 ##m^3/kg\n",
+      "v1= 0.001 ##m^3/kg\n",
+      "u2= 2768.8 ##kJ/kg\n",
+      "u1= 83.96 ##kJ/kg\n",
+      "T= 20 ##C\n",
+      "u3= 2576.9 ##kJ/kg\n",
+      "s2= 7.2795 ##kJ/kg K\n",
+      "s1= 0.2966 ##kJ/kg K\n",
+      "Tr= 150 ##C\n",
+      "##CALCULATIONS\n",
+      "W= m*p*(v2-v1)\n",
+      "Q= m*(u2-u1)\n",
+      "A= m*((u3-u1)-(273.15+T)*(s2-s1))\n",
+      "Ar= -Q*(1-((273.15+T)/(273.15+Tr)))\n",
+      "Wrep= -(A+Ar)\n",
+      "##RESULTS\n",
+      "print'%s %.1f %s'%('work of the water =',W,'kJ')\n",
+      "print'%s %.1f %s'% ('Heat interaction of the water =',Q,'kJ')\n",
+      "print'%s %.1f %s'%('maximum work done =',Wrep,'kJ')\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "work of the water = 383.4 kJ\n",
+        "Heat interaction of the water = 5369.7 kJ\n",
+        "maximum work done = 757.9 kJ\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example2-pg 182"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate irreversibility of the processes\n",
+      "##initialisation of variables\n",
+      "Wrev= 757.8 ##kJ\n",
+      "W= 383.4 ##kJ\n",
+      "m= 2 ##kg\n",
+      "s2= 7.2795 ##kJ/kg K\n",
+      "s1= 0.2966  ##kJ/kg K\n",
+      "Qr= 5369.7 ##kJ\n",
+      "T= 150 ##C\n",
+      "T0= 20 ##C\n",
+      "##CALCULATIONS\n",
+      "I= Wrev-W\n",
+      "dS= m*(s2-s1)\n",
+      "Sr= -Qr/(273.15+T)\n",
+      "I1= (273.15+T0)*(dS+Sr)\n",
+      "##RESULTS\n",
+      "print'%s %.1f %s'%('Irreversibility of the process=',I1,'kJ')\n",
+      "\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Irreversibility of the process= 374.1 kJ\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example7-pg192"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate mass flow rates and wmax and irreversibility\n",
+      "import math\n",
+      "##initialisation of variables\n",
+      "h3= 2793.2 ##kJ/kg\n",
+      "h2= 1342.3 ##kJ/kg\n",
+      "h1= 2993.5 ##kJ/kg\n",
+      "m3= 2.5 ##kg/s\n",
+      "b1= 1043.9 ##kJ/kg\n",
+      "b2= 374.24 ##kJ/kg\n",
+      "b3= 875.41 ##kJ/kg\n",
+      "##CALCULATIONS\n",
+      "m1= m3*((h3-h2)/(h1-h2))\n",
+      "m2= m3*((h3-h1)/(h2-h1))\n",
+      "Bin= (m1*b1+m2*b2)\n",
+      "Bout= m3*b3\n",
+      "B= Bin-Bout\n",
+      "Wmax= B\n",
+      "I= B\n",
+      "##RESULTS\n",
+      "print'%s %.3f %s'%('mass flow rate=',m1,'kg/s')\n",
+      "print'%s %.3f %s'%('mass flow rate=',m2,'kg/s')\n",
+      "print'%s %.3f %s'%('Wmax=',Wmax,'kg/s')\n",
+      "print'%s %.1f %s'%('Irreversibility=',Wmax,'kW')\n",
+      "\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "mass flow rate= 2.197 kg/s\n",
+        "mass flow rate= 0.303 kg/s\n",
+        "Wmax= 218.141 kg/s\n",
+        "Irreversibility= 218.1 kW\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file