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+{

+ "metadata": {

+  "name": "",

+  "signature": "sha256:cafa634c5fbcfd5447496e6358027f61ba038aded335f02d8eee875e161267c7"

+ },

+ "nbformat": 3,

+ "nbformat_minor": 0,

+ "worksheets": [

+  {

+   "cells": [

+    {

+     "cell_type": "heading",

+     "level": 1,

+     "metadata": {},

+     "source": [

+      "CHAPTER 4: THE STEAM ENGINE"

+     ]

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.1 Page 46"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "p=90#lb/in^2\n",

+      "x1=0.9#lb\n",

+      "p1=10#lb/in^2\n",

+      "x2=0.81#lb\n",

+      "s1=161.5#lb.in^2\n",

+      "s2=89.1#lb.in^2\n",

+      "L1=496.8#lb.in^2\n",

+      "L2=545.5#lb.in^2\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "bc=(s1-s2)+(x1*L1)#C.H.U/lb\n",

+      "da=x2*L2#C.H.U/lb\n",

+      "W=bc-da#C.H.U/lb\n",

+      "R=W/bc*100#percent\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"the work done per\",round(R,3),\"%\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "the work done per 14.949 %\n"

+       ]

+      }

+     ],

+     "prompt_number": 6

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.2 Page 47"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "h=1600.0#i.h.p\n",

+      "h1=20000.0#lb\n",

+      "h2=230.0#lb/in^2\n",

+      "T1=293.3#Degree C\n",

+      "x=25.91#in\n",

+      "v=30.0#in\n",

+      "T2=201#Degree C\n",

+      "T=T1-T2#degree C\n",

+      "x2=0.845#lb\n",

+      "L2=566.51#lb\n",

+      "s1=724#lb\n",

+      "h3=1400#C.H.U/hr\n",

+      "x=33000#ft^3\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "H=671.48#C.H.U/lb\n",

+      "ea=x2*L2#C.H.U/lb\n",

+      "W=H-ea#C.H.U/lb\n",

+      "R=W/H*100#percent\n",

+      "S=h2*s1#C.H.U\n",

+      "I=((h*x*60)/(h3*h1*s1))*100#percent\n",

+      "R1=I/R*100#pecent\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The indicated thermal efficiency ratio is\",round(R1,3),\"%\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The indicated thermal efficiency ratio is 54.433 %\n"

+       ]

+      }

+     ],

+     "prompt_number": 8

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.3 Page 49"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "h1=180#lb/in^2\n",

+      "h2=3#lb/in^2\n",

+      "r1=60#percent\n",

+      "r2=90#percent\n",

+      "p3=100#lb/in^2\n",

+      "p4=10#lb/in^2\n",

+      "v1=4.4#ft^3/lb\n",

+      "v2=2*v1#ft^3\n",

+      "p=44#lb/in^2\n",

+      "x2=0.95#ft^3\n",

+      "s1=165.9#lb\n",

+      "s2=89.1#lb\n",

+      "L1=493.4#lb\n",

+      "H=(s1-s2)+L1#C.H.U/lb\n",

+      "W=65.8#C.H.U/lb\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "R=W/H*100#percent\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The rankine efficiency of the engine is\",round(R,3),\"%\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The rankine efficiency of the engine is 11.54 %\n"

+       ]

+      }

+     ],

+     "prompt_number": 9

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.10 Page 52"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "p=85.0#lb/in^2\n",

+      "h=210.0#i.p.m\n",

+      "h1=8.0#in\n",

+      "h2=2.5#in\n",

+      "h3=20.0#in\n",

+      "x=0.75#in\n",

+      "p1=100.0#ln/in^2\n",

+      "x1=33000.0#in\n",

+      "p2=15.0#lb/in^2\n",

+      "v2=pi/4*(h1/12)**2*(h3/12)#ft^3\n",

+      "A=144*(29.08*1.6931-8.724)#ft/lb\n",

+      "d=x*A#ft/lb\n",

+      "v3=0.5816#ft^3\n",

+      "P=d/(144*v3)#lb/in^2\n",

+      "P1=pi/4*64#in^2\n",

+      "r=25*pi/16#in^2\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "H=P*(h3/12)*P1*h/(x1)\n",

+      "I=(P*(h3/12)*(P1-r)*h)/(x1)#I.h.P\n",

+      "T=H+I#I.h.p\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"the h.p diameter of the piston and piston rod is\",round(T,3),\"I.h.p\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "the h.p diameter of the piston and piston rod is 52.982 I.h.p\n"

+       ]

+      }

+     ],

+     "prompt_number": 11

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.14 Page 55"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "a=1.025#in^2\n",

+      "h=18.0#in\n",

+      "h1=24.0#in\n",

+      "x=8.2#percent\n",

+      "v=15.0#in\n",

+      "v2=6.9#ft^3\n",

+      "p=0.74#lb/in^2\n",

+      "p1=50.0#lb/in^2\n",

+      "p2=83.0#lb/in^2\n",

+      "P3=48.0#lb/in\n",

+      "P1=29.8#lb/in^2\n",

+      "P2=14.6#lb/in^2\n",

+      "h2=29.8#in\n",

+      "D=(pi/4)*(3.0/2.0)**2*2#ft^3\n",

+      "v1=23400.0#ft.lb\n",

+      "W=a*v1#ft.lb\n",

+      "V=0.082*D#ft^3\n",

+      "Q=1.530#ft^3\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "I=V+Q#ft^3\n",

+      "P=P3+P2#lb/in^2\n",

+      "V1=p*v2#ft^3\n",

+      "W1=I/V1#lb\n",

+      "S=p2+P2#l/in^2\n",

+      "H=659.06#C.H.U/lb\n",

+      "T=W/(H*W1*1400)*100#percent\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The thermal efficiency of the engine is\",round(T,3),\"%\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The thermal efficiency of the engine is 7.294 %\n"

+       ]

+      }

+     ],

+     "prompt_number": 14

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.16 Page 57"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "v=4.6#ft^3\n",

+      "h=5.0#percent\n",

+      "p=60.0#lb/in^2\n",

+      "p1=0.8#ft^3\n",

+      "p2=19.0#lb/in^2\n",

+      "a=100.0#r.p.m\n",

+      "h1=5920.0#lb\n",

+      "W=h1/(2*a*p)#lb\n",

+      "V=(0.25*v)#ft^3\n",

+      "v1=21.07#ft^3\n",

+      "w=V/v1#lb\n",

+      "H=W+w#lb\n",

+      "v2=H*7.17#ft^3\n",

+      "P=w*v2#ft^3\n",

+      "P1=0.675*v#ft^3\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "DP=P1/v2#ft^2\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The assumptions do you make in working out the dryness of the steam is\",round(DP,3),\"ft^3\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The assumptions do you make in working out the dryness of the steam is 0.79 ft^3\n"

+       ]

+      }

+     ],

+     "prompt_number": 16

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.17 Page 58"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "h=0.08#lb\n",

+      "p=60#lb/in^2\n",

+      "p1=0.50#lb/in^2\n",

+      "v=0.5#ft^3\n",

+      "v1=7.17#ft^3\n",

+      "V=h*v1#ft^3\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "W=p1/v1#lb\n",

+      "I=v/v1#lb\n",

+      "M=h-I#lb\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The dryness of the steam at this pressure and missing quantity is\",round(M,6),\"lb\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The dryness of the steam at this pressure and missing quantity is 0.010265 lb\n"

+       ]

+      }

+     ],

+     "prompt_number": 18

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.19 Page 59"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "p1=120#lb/in^2\n",

+      "p2=15#lb/in^2\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "v=1.65#lb\n",

+      "D=sqrt(v)#lb\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The above pressure are by gauge is\",round(D,3),\"lb\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The above pressure are by gauge is 1.285 lb\n"

+       ]

+      }

+     ],

+     "prompt_number": 19

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.21 Page 61"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "p=150.0#lb/in^2\n",

+      "x=198.0#r.p.m\n",

+      "x1=33000.0#lb\n",

+      "h=2700.0#lb\n",

+      "h1=1400.0#lb\n",

+      "h2=51600.0#lb\n",

+      "r=165.0#C.H.U/lb\n",

+      "s=60.0#lb\n",

+      "t=48.0#Degree C\n",

+      "t1=11.0#degree C\n",

+      "t2=36.0#Degree C\n",

+      "P1=(40*75*t2*x)/(12*x1)#lb\n",

+      "P2=(38*70*t2*x)/(12*x1)#lb\n",

+      "L1=(t1*300*t2*x)/(12*x1)#lb\n",

+      "L2=(12*295*t2*x)/(12*x1)#lb\n",

+      "T=P1*P2*L1*L2#lb\n",

+      "H=5294#C.H.U/min\n",

+      "T1=h/s#lb/min\n",

+      "H1=T1*663#lb/min\n",

+      "H2=(h2/s*(36-11)+(h/s)*(t))#C.H.U\n",

+      "H3=(h/60)*t#C.H.U\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "TE=H/H1-H3*100#percent\n",

+      "R=r/(663-t)*100#percent\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The rankine efficiency is\",round(R,3),\"%\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The rankine efficiency is 26.829 %\n"

+       ]

+      }

+     ],

+     "prompt_number": 21

+    },

+    {

+     "cell_type": "heading",

+     "level": 2,

+     "metadata": {},

+     "source": [

+      "Example 4.23 Page 64"

+     ]

+    },

+    {

+     "cell_type": "code",

+     "collapsed": false,

+     "input": [

+      "#initialisation of variable\n",

+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan\n",

+      "p1=100#ln/in^2\n",

+      "p2=2.5#lb/in^2\n",

+      "p3=20#lb/in^2\n",

+      "d=0.75#lb\n",

+      "p=0.5#lb\n",

+      "r=16#in\n",

+      "p4=p1/r#lb/in^2\n",

+      "P5=50#lb/in^2\n",

+      "W1=13960#ft/lb\n",

+      "W2=19040#ft/lb\n",

+      "T=33000#ft/lb\n",

+      "v=4.43#ft^3\n",

+      "v1=v*d#ft^3\n",

+      "W3=T*v1#ft/lb\n",

+      "Hp=3416#ft/lb\n",

+      "Lp=3416#ft/lb\n",

+      "\n",

+      "#CALCULATIONS\n",

+      "W=Lp*v1#ft lb\n",

+      "\n",

+      "#RESULTS\n",

+      "print\"The thermal efficiency of a compound steam and work done is\",round(W,3),\"ft lb\""

+     ],

+     "language": "python",

+     "metadata": {},

+     "outputs": [

+      {

+       "output_type": "stream",

+       "stream": "stdout",

+       "text": [

+        "The thermal efficiency of a compound steam and work done is 11349.66 ft lb\n"

+       ]

+      }

+     ],

+     "prompt_number": 22

+    }

+   ],

+   "metadata": {}

+  }

+ ]

+}
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