Revised list of TBCs

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-{

- "metadata": {

-  "name": "",

-  "signature": "sha256:dc464f4ef08695f8cec0668d0c21cb89b005d8581737f852d592d0e688b3aa48"

- },

- "nbformat": 3,

- "nbformat_minor": 0,

- "worksheets": [

-  {

-   "cells": [

-    {

-     "cell_type": "heading",

-     "level": 1,

-     "metadata": {},

-     "source": [

-      "Chapter 16 - Gas cycles"

-     ]

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example 1 - Pg 330"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#calculate the max. pressure, temperature and thermal efficiency\n",

-      "#Initalization of variables\n",

-      "import math\n",

-      "cr=9.\n",

-      "p1=14. #psia\n",

-      "t1=80.+460 #R\n",

-      "n=1.4\n",

-      "heat=800. #Btu\n",

-      "c=0.1715\n",

-      "R=53.35\n",

-      "J=778.\n",

-      "#calculations\n",

-      "p2=p1*math.pow(cr,n)\n",

-      "t2=t1*math.pow(cr,(n-1))\n",

-      "t3=heat/c +t2\n",

-      "p3=p2*t3/t2\n",

-      "eff=(1-1/math.pow(cr,(n-1)))*100\n",

-      "t4=t3/math.pow(cr,(n-1))\n",

-      "Qr=c*(t4-t1)\n",

-      "cyclework=heat-Qr\n",

-      "eff2= cyclework/heat *100\n",

-      "V1=R*t1/(144*p1)\n",

-      "pd=(1-1/cr)*V1\n",

-      "mep=cyclework*J/(pd*144)\n",

-      "#results\n",

-      "print '%s %d %s' %(\"Max. temperature =\",t3,\"R\")\n",

-      "print '%s %d %s' %(\"\\n Max. pressure =\",p3,\"psia\")\n",

-      "print '%s %.1f %s' %(\"\\n In method 1,Thermal efficiency =\",eff,\" percent\")\n",

-      "print '%s %.1f %s' %(\"\\n In method 2,Thermal efficiency =\",eff2,\" percent\")\n",

-      "print '%s %.1f %s' %(\"\\n Mean effective pressure mep =\",mep,\" psia\")\n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Max. temperature = 5965 R\n",

-        "\n",

-        " Max. pressure = 1391 psia\n",

-        "\n",

-        " In method 1,Thermal efficiency = 58.5  percent\n",

-        "\n",

-        " In method 2,Thermal efficiency = 58.5  percent\n",

-        "\n",

-        " Mean effective pressure mep = 199.0  psia\n"

-       ]

-      }

-     ],

-     "prompt_number": 1

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example 2 - Pg 333"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#calculate the max temperature, pressure and thermal efficiency\n",

-      "#Initalization of variables\n",

-      "import math\n",

-      "t1=80+460. #R\n",

-      "p1=14. #psia\n",

-      "n=1.4\n",

-      "cr=16.\n",

-      "heat=800. #Btu\n",

-      "cp=0.24\n",

-      "c=0.1715\n",

-      "#calculations\n",

-      "t2=t1*math.pow(cr,(n-1))\n",

-      "p2=p1*math.pow(cr,n)\n",

-      "t3=t2 +heat/cp\n",

-      "v32=t3/t2\n",

-      "v43=cr/v32\n",

-      "t4=t3/math.pow(v43,(n-1))\n",

-      "Qr=c*(t4-t1)\n",

-      "etat=(heat-Qr)/heat *100\n",

-      "#results\n",

-      "print '%s %d %s' %(\"Max. Temperature =\",t3,\" R\")\n",

-      "print '%s %d %s' %(\"\\n Max. Pressure =\",p2,\"psia\")\n",

-      "print '%s %.1f %s' %(\"\\n Thermal efficiency =\",etat,\" percent\")\n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Max. Temperature = 4970  R\n",

-        "\n",

-        " Max. Pressure = 679 psia\n",

-        "\n",

-        " Thermal efficiency = 56.8  percent\n"

-       ]

-      }

-     ],

-     "prompt_number": 2

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example 3 - Pg 335"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#calculate the Mean effective pressure\n",

-      "#Initalization of variables\n",

-      "eff=0.585\n",

-      "heat=800. #Btu\n",

-      "t1=80+460. #R\n",

-      "p1=14. #psia\n",

-      "n=1.4\n",

-      "R=53.35\n",

-      "cr=9.\n",

-      "cp=0.24\n",

-      "J=778.\n",

-      "#calculations\n",

-      "W=eff*heat\n",

-      "v1=R*t1/(144*p1)\n",

-      "v2=v1/cr\n",

-      "t2=1301 #R\n",

-      "t3=t2+ heat/cp\n",

-      "v3=v2*t3/t2\n",

-      "v4=cr*v3\n",

-      "mep=W*J/(144*(v4-v2))\n",

-      "#results\n",

-      "print '%s %.1f %s' %(\"Mean effective pressure =\",mep,\" psia\")\n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Mean effective pressure = 51.3  psia\n"

-       ]

-      }

-     ],

-     "prompt_number": 3

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example 4 - Pg 340"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#calculate the max temperature, pressure, thermal efficiency, mean effective pressure\n",

-      "#Initalization of variables\n",

-      "import math\n",

-      "eff=0.585\n",

-      "heat=500. #Btu\n",

-      "heat1=300. #Btu\n",

-      "t1=80+460. #R\n",

-      "p1=14. #psia\n",

-      "n=1.4\n",

-      "R=53.35\n",

-      "cr=9.\n",

-      "J=778.\n",

-      "c=0.1715\n",

-      "cp=0.24\n",

-      "t2=1301. #R\n",

-      "p2=308. #psia\n",

-      "#calculations\n",

-      "t3=t2+ heat/c\n",

-      "p3=p2*t3/t2\n",

-      "t4=t3+ heat1/cp\n",

-      "v43=t4/t3\n",

-      "v54=cr/v43\n",

-      "t5=t4/math.pow(v54,(n-1))\n",

-      "Qr=c*(t5-t1)\n",

-      "etat=(heat+heat1-Qr)/(heat+heat1) *100\n",

-      "mep=(heat+heat1-Qr)*J/(12.69*144)\n",

-      "#results\n",

-      "print '%s %d %s' %(\"Max. Temperature =\",t4,\" R\")\n",

-      "print '%s %d %s' %(\"\\n Max. Pressure =\",p3,\"psia\")\n",

-      "print '%s %.1f %s' %(\"\\n Thermal efficiency =\",etat,\"percent\")\n",

-      "print '%s %.1f %s' %(\"\\n Mean effective pressure =\",mep,\" psia\")\n",

-      "print '%s' %(\"The calculations are a bit different due to rounding off error in textbook\")\n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Max. Temperature = 5466  R\n",

-        "\n",

-        " Max. Pressure = 998 psia\n",

-        "\n",

-        " Thermal efficiency = 57.6 percent\n",

-        "\n",

-        " Mean effective pressure = 196.2  psia\n",

-        "The calculations are a bit different due to rounding off error in textbook\n"

-       ]

-      }

-     ],

-     "prompt_number": 4

-    }

-   ],

-   "metadata": {}

-  }

- ]

-}
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