{
 "metadata": {
  "name": "",
  "signature": "sha256:f794a4d18f36c13ddab8d6024721da6bc9aca8b98b0260eaf3e1fb73a8bd345d"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Chapter 4-simple systems"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example1-pg43"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#caluclate the heat interaction and temperature rise\n",
      "##initialisation of variables\n",
      "m= 5000. ##kg\n",
      "cp= 1.4 ##kJ/kg K\n",
      "T2= 27.6 ##K\n",
      "T1= 22. ##K\n",
      "t= 40. ##min\n",
      "P= 20. ##kW\n",
      "##CALCULATIONS\n",
      "H= m*cp*(T2-T1)\n",
      "W= -P*t*60\n",
      "Q= H+W\n",
      "dT= -W/(m*cp)\n",
      "##RESULTS\n",
      "print'%s %.f %s'%('heat interaction =',Q,'kJ')\n",
      "print'%s %.2f %s'%('Temperature rise = ',dT,'C')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "heat interaction = -8800 kJ\n",
        "Temperature rise =  6.86 C\n"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "example 2-pg 49\n"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#caluclate the volumes and internal energy and enthaply\n",
      "##initialisation of variables\n",
      "T= 300. ##C\n",
      "p= 2. ##Mpa\n",
      "T1= 300. ##C\n",
      "p1= 20.##Mpa\n",
      "T2= 300. ##C\n",
      "p2= 8.501 ##Mpa\n",
      "##CALCULATIONS\n",
      "v= 0.12547\n",
      "v1= 0.00136\n",
      "u= 2772.6\n",
      "u1= 1306.1\n",
      "h= 3023.5\n",
      "h1= 1333.3\n",
      "##RESULTS\n",
      "print'%s %.5f %s'%('volume =',v,'m^3/kg')\n",
      "print'%s %.5f %s'%('volume =',v1,'m^3/kg')\n",
      "print'%s %.1f %s'%('internal energy = ',u,'kJ/kg')\n",
      "print'%s %.1f %s'%('internal energy =',u1,'kJ/kg')\n",
      "print'%s %.1f %s'%('enthalpy =',h,'kJ/kg')\n",
      "print'%s %.f %s'%('enthalpy = ',h1,'kJ/kg')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "volume = 0.12547 m^3/kg\n",
        "volume = 0.00136 m^3/kg\n",
        "internal energy =  2772.6 kJ/kg\n",
        "internal energy = 1306.1 kJ/kg\n",
        "enthalpy = 3023.5 kJ/kg\n",
        "enthalpy =  1333 kJ/kg\n"
       ]
      }
     ],
     "prompt_number": 17
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "example3-pg49\n"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate the volume and internal energy and enthalpy\n",
      "##initialisation of variables\n",
      "vf= 0.001404 ##m^3/kg\n",
      "x= 0.8\n",
      "vg= 0.02167 ##m^3/kg\n",
      "uf= 1332. ##kJ/kg\n",
      "ug= 1231. ##kJ/kg\n",
      "hf= 1344. ##kJ/kg\n",
      "hg= 1404.9 ##kJ/kg\n",
      "##CALCULATIONS\n",
      "v= vf+x*(vg-vf)\n",
      "u= uf+x*ug\n",
      "h= hf+x*hg\n",
      "##RESULTS\n",
      "print'%s %.5f %s'%('volume =',v,'m^3/kg')\n",
      "print'%s %.1f %s'%('internal energy =',u,'kJ/kg')\n",
      "print'%s %.1f %s'%('enthalpy =',h, 'kJ/kg')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "volume = 0.01762 m^3/kg\n",
        "internal energy = 2316.8 kJ/kg\n",
        "enthalpy = 2467.9 kJ/kg\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example4-pg 52"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate the specific volume and internal energy and enthalpy and entropy\n",
      "##initialisation of variables\n",
      "T= 296. ##K\n",
      "T1= 250. ##K\n",
      "T2= 300. ##K\n",
      "v= 0.1257 ##m^3/kg\n",
      "v1= 0.11144 ##m^3/kg\n",
      "u1= 27772.6 ##kJ/kg\n",
      "u2= 2679.6 ##kJ/kg\n",
      "h1= 3023.5 ##kJ/kg\n",
      "h2= 2902.5 ##kJ/kg\n",
      "s1= 6.7664 ##kJ/kg K\n",
      "s2= 6.5433 ##kJ/kg K\n",
      "##CALCULATIONS\n",
      "a1= (T-T1)/(T2-T1)\n",
      "a2= 1-a1\n",
      "V= a1*v+a2*v1\n",
      "U= a1*u1+a2*u2\n",
      "H= a1*h1+a2*h2\n",
      "S= a1*s1+a2*s2\n",
      "##RESULTS\n",
      "print'%s %.3f %s'%('a2 = ',a2,'')\n",
      "print'%s %.5f %s'%('specific volume =',V,'m^3/kg')\n",
      "print'%s %.1f %s'%('internal energy =',U,'kJ/kg')\n",
      "print'%s %.1f %s'%('enthalpy =',H,'kJ/kg')\n",
      "print'%s %.1f %s'%('Entropy =',S,'kJ/kg')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a2 =  0.080 \n",
        "specific volume = 0.12456 m^3/kg\n",
        "internal energy = 25765.2 kJ/kg\n",
        "enthalpy = 3013.8 kJ/kg\n",
        "Entropy = 6.7 kJ/kg\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Exapmle5-pg54"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate a2 and internal enerjy\n",
      "##initialisation of variables\n",
      "v= 0.15 ##m^3/kg\n",
      "v1= 0.13857 ##m^3/kg\n",
      "v2= 0.1512 ##m^3/kg\n",
      "v3= 0.050 ##m^3##kg\n",
      "vf= 0.001177 ##m^3/kg\n",
      "vg= 0.09963 ##m^3/kg\n",
      "uf= 906.44 ##kJ/kg\n",
      "ufg= 1693.8 ##kJ/kg\n",
      "##CALCULATIONS\n",
      "a1= (v-v1)/(v2-v1)\n",
      "a2= 1-a1\n",
      "x= (v3-vf)/(vg-vf)\n",
      "u= uf+x*ufg\n",
      "##RESULTS\n",
      "print'%s %.3f %s'%('a2 =',a2,'')\n",
      "print'%s %.1f %s'%('internal energy =',u,'kJ/kg')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a2 = 0.095 \n",
        "internal energy = 1746.4 kJ/kg\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example6-pg52"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate pressure and temperature\n",
      "##initialisation of variables\n",
      "T= 250.##C\n",
      "T1= 300. ##C\n",
      "v300= 0.6548 ##m^3/kg\n",
      "v250= 0.591 ##m^3/kg\n",
      "v= 0.6 ##m^3/kg\n",
      "u= 3000. ##kJ/kg\n",
      "u250= 2726.1 ##kJ/kg\n",
      "u300= 2804.8 ##kJ/kg\n",
      "T2= 510.30 \n",
      "u2= 3145.26 ##kJ/kg\n",
      "p= 0.4 ##Mpa\n",
      "p2= 0.2 ##Mpa\n",
      "##CALCULATIONS\n",
      "T1= T1+((v-v250)/(v300-v250))*(T2-T)\n",
      "u1= u250+((v-v250)/(v300-v250))*(u300-u250)\n",
      "du= u1-u\n",
      "p1= p+((u-u1)/(u2-u1))*p2\n",
      "##RESULTS\n",
      "print'%s %.3f %s'%('pressure =',p1,'Mpa')\n",
      "print'%s %.f %s'%('temperature =',T2,'C')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "pressure = 0.529 Mpa\n",
        "temperature = 510 C\n"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 7-pg54"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate work and heat interaction\n",
      "##initialisation of variables\n",
      "V= 0.2 ##m^3\n",
      "v1= 0.02995 ##m^3/kg\n",
      "u2= 2826.7 ##kJ/kg\n",
      "u1= 2747.7 ##kJ/kg\n",
      "h2= 3092.5 ##kJ/kg\n",
      "h1= 2987.3 ##kJ/kg\n",
      "p= 4 ##Mpa\n",
      "v2= 0.06645 ##m^3/kg\n",
      "v1= 0.02995 ##m^3/kg\n",
      "##CALCULATIONS\n",
      "m= V/v1\n",
      "U= m*(u2-u1)\n",
      "H= m*(h2-h1)\n",
      "W= m*p*10*10*10*(v2-v1)\n",
      "Q= U+W\n",
      "##RESULTS\n",
      "print'%s %.1f %s'%('work =',W,'kJ') \n",
      "print'%s %.1f %s'%('heat interaction =',Q,'kJ')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "work = 975.0 kJ\n",
        "heat interaction = 1502.5 kJ\n"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example8-pg 55"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate work and heat interaction\n",
      "##initialisation of variables\n",
      "m= 6.678 ##kg\n",
      "u2= 2826.7 ##kJ/kg\n",
      "u1= 2747.7 ##kJ/kg\n",
      "p1= 8. ##Mpa\n",
      "p2= 7. ##Mpa\n",
      "p3= 6. ##Mpa\n",
      "p4= 5. ##Mpa\n",
      "p5= 4. ##Mpa\n",
      "v1= 29.95 ##L/kg\n",
      "v2= 35.24 ##L/kg\n",
      "v3= 42.23 ##L/kg\n",
      "v4= 51.94 ##L/kg\n",
      "v5= 66.45 ##L/kg\n",
      "##CALCULATIONS\n",
      "U= m*(u2-u1)\n",
      "W= m*0.5*((p1+p2)*(v2-v1)+(p2+p3)*(v3-v2)+(p3+p4)*(v4-v3)+(p4+p5)*(v5-v4))\n",
      "Q=U+W\n",
      "##RESULTS\n",
      "print'%s %.1f %s'%('work =',W,'kJ') \n",
      "print'%s %.f %s'%('heat interaction =',Q,'kJ') \n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "work = 1361.0 kJ\n",
        "heat interaction = 1889 kJ\n"
       ]
      }
     ],
     "prompt_number": 12
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9-pg56\n"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "#calculate final pressure and enthalpy and etropy\n",
      "##initialisation of variables\n",
      "p0= 100. ##kpa\n",
      "A= 0.1 ##m^2\n",
      "F= 20. ##kN\n",
      "m3= 0.8873 ##kg\n",
      "m1= 1.1384 ##kg\n",
      "m2= 0.2511 ##kg\n",
      "u1= 3116.2 ##kJ/kg\n",
      "u2= 2728.7 ##kJ/kg\n",
      "v3= 0.9942 ##m^3/kg\n",
      "##CALCULATIONS\n",
      "pe= (p0+(F/A))/1000\n",
      "h3= (m1*u1-m2*u2)/m3\n",
      "z3= m3*v3/A\n",
      "##RESULTS\n",
      "print'%s %.1f %s'%('final pressure =',pe,'Mpa') \n",
      "print'%s %.1f %s'%('enthalpy = ',h3,'kJ/kg') \n",
      "print'%s %.2f %s'%('piston rise =',z3,'m') \n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "final pressure = 0.3 Mpa\n",
        "enthalpy =  3225.9 kJ/kg\n",
        "piston rise = 8.82 m\n"
       ]
      }
     ],
     "prompt_number": 14
    }
   ],
   "metadata": {}
  }
 ]
}