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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:86e00f67d619987b1a4198153e70d431ddb0592847bf75b0bc55b544e7c1f8d2"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 8 - Availability of Energy"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 1 - Pg 120"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate the available energy loss\n",
+      "#Initialization of variables\n",
+      "q=1000. #Btu\n",
+      "th=1140. #F\n",
+      "tl=40. #F\n",
+      "ts=940. #F\n",
+      "#calculations\n",
+      "Q1=q*(th-tl)/(th+460)\n",
+      "Q2=q*(ts-tl)/(ts+460)\n",
+      "dif=Q1-Q2\n",
+      "#results\n",
+      "print '%s %d %s' %(\"Available energy loss =\",dif,\"Btu\")\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Available energy loss = 44 Btu\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2 - Pg 124"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate the untransferred, transferred, available, unavailable energy for both gas and water\n",
+      "#Initialization of variables\n",
+      "import math\n",
+      "ma=200000. #lb\n",
+      "cpa=0.26\n",
+      "T2g=1200. #F\n",
+      "T1g=300. #F\n",
+      "T1w=200. #F\n",
+      "mw=250000. #lb\n",
+      "cpw=1.02\n",
+      "Tl=560.  #R\n",
+      "cx=1.01\n",
+      "#calculations\n",
+      "T2w=T1w+ ma*cpa*(T2g-T1g)/(mw*cpw)\n",
+      "Qun=Tl*ma*cpa*math.log((T2g+460)/(T1g+460))\n",
+      "Qtr=ma*cpa*(T2g-T1g)\n",
+      "Qav=Qtr-Qun\n",
+      "Qun2=Tl*mw*cx*math.log((T2w+460)/(T1w+460))\n",
+      "Qav2=Qtr-Qun2\n",
+      "ht1=Qav-Qav2\n",
+      "#results\n",
+      "print '%s %d %s' %(\"For gas, Untransferred energy =\",Qun,\"Btu/hr\")\n",
+      "print '%s %d %s' %(\"\\n For gas, transferred energy =\",Qtr,\"Btu/hr\")\n",
+      "print '%s %d %s' %(\"\\n For gas, available energy =\",Qav,\"Btu/hr\")\n",
+      "print '%s %d %s' %(\"\\n For water, Untransferred energy =\",Qun2,\"Btu/hr\")\n",
+      "print '%s %d %s' %(\"\\n For water, available energy =\",Qav2,\" Btu/hr\")\n",
+      "print '%s %d %s' %(\"\\n Loss of available energy =\",ht1,\"Btu/hr\")\n",
+      "print '%s' %('The answers are a bit different due to rounding off error in textbook')\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "For gas, Untransferred energy = 22750129 Btu/hr\n",
+        "\n",
+        " For gas, transferred energy = 46800000 Btu/hr\n",
+        "\n",
+        " For gas, available energy = 24049870 Btu/hr\n",
+        "\n",
+        " For water, Untransferred energy = 34693187 Btu/hr\n",
+        "\n",
+        " For water, available energy = 12106812  Btu/hr\n",
+        "\n",
+        " Loss of available energy = 11943058 Btu/hr\n",
+        "The answers are a bit different due to rounding off error in textbook\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file