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+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:9a6776975ca26711999c009e1ea80f5d9873f1eba4664269073ed9b23e69c74f"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 10 :\n",
+ "Gaseous Mixtures"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.1 pg : 262"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "m = 2. \n",
+ "M = 28.\n",
+ "M2 = 32.\n",
+ "PN = 300. \t\t\t#psia\n",
+ "Pt = 400.\t\t\t#psia\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "nN = m/M\n",
+ "PO = Pt-PN\n",
+ "nO = nN*PO/PN\n",
+ "mO = M2*nO\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"Mass of oxygen added = %.3f lbm\"%(mO)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Mass of oxygen added = 0.762 lbm\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.2 pg : 262"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "n = 0.0714\n",
+ "R = 1545.\n",
+ "T = 560. \t\t\t#R\n",
+ "P = 400. \t\t\t#psia\n",
+ "VN = n*R*T/(P*144)\n",
+ "VO = (0.0238)*R*T/(P*144)\n",
+ "V = VN+VO\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"Total volume = %.3f ft**3\"%(V)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Total volume = 1.430 ft**3\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.3 pg : 265"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "import math \n",
+ "m1 = 5.\n",
+ "m2 = 2.\n",
+ "cp1 = 0.248\n",
+ "cp2 = 0.203\n",
+ "T11 = 300. \t\t\t#F\n",
+ "T12 = 100. \t\t\t#F\n",
+ "P = 10. \t\t\t#psia\n",
+ "Pi = 20. \t\t\t#psia\n",
+ "Pf = 15. \t\t\t#psia\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "T2 = (m1*cp1*T11 + m2*cp2*T12)/(m1*cp1+m2*cp2)\n",
+ "n1 = m1/28.\n",
+ "n2 = m2/44.\n",
+ "n = n1+n2\n",
+ "P1 = P*n1/n\n",
+ "P2 = P*n2/n\n",
+ "dS = m2*(cp2*math.log((T2+460)/(T12+460)) - 35.1/778 *math.log(P2/Pi)) +m2*(cp2*math.log((T2+460)/(T12+460)) - 55.2/778 *math.log(P1/Pf))\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"change in enthalpy = %.2f B/R\"%(dS)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "change in enthalpy = 0.49 B/R\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.4 pg : 268"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "Pg = 2.8886 \t\t\t#psia\n",
+ "P = 25. \t\t\t#psia\n",
+ "phi = 0.5\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "pv = phi*Pg\n",
+ "pa = P-pv\n",
+ "w = 0.622*pv/pa\n",
+ "x = (w)/(1+w)\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"Mass fraction of water vapor in the mixture = %.4f lbm vapor/ lvm mixture\"%(x)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Mass fraction of water vapor in the mixture = 0.0367 lbm vapor/ lvm mixture\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.5 pg : 271"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "pgw = 0.5069 \t\t\t#psia\n",
+ "p = 14.696 \t\t\t#psia\n",
+ "Td = 100. \t \t\t#F\n",
+ "Tw = 80. \t\t\t#F\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "pv = pgw- (p-pgw)*(Td-Tw)/(2800-Tw)\n",
+ "pg = 0.9492 \t\t\t#psia\n",
+ "phi = pv/pg\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"relative humidity of air stream = %.1f percent\"%(phi*100)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "relative humidity of air stream = 42.4 percent\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.6 pg : 279"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "w1 = 0.0176 \t\t\t#lbm\n",
+ "w2 = 0.0093 \t\t\t#lbm\n",
+ "T2d = 73. \t\t\t#F\n",
+ "T2 = 55. \t\t\t#F\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "hv1 = 1061+0.445*100\n",
+ "hv2 = 1061+0.445*55\n",
+ "hf = 23.06\n",
+ "q1 = 20.\n",
+ "q2 = 4.88\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"Heat removed in cooling section = %d Btu/lbm \"%(q1)\n",
+ "print \"Heat added in heating section = %.2f Btu/lbm \"%(q2)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Heat removed in cooling section = 20 Btu/lbm \n",
+ "Heat added in heating section = 4.88 Btu/lbm \n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.7 pg : 280"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "Tdb = 115. \t\t\t#F\n",
+ "ph = 0.05\n",
+ "\n",
+ "Twb = 67. \t\t\t#F\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print (\"From steam tables, Twb = 67 F\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From steam tables, Twb = 67 F\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 10.8 pg : 280"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\t\t\t\n",
+ "# Variables\n",
+ "w1 = 206.\n",
+ "w2 = 55.\n",
+ "ma1 = 2.\n",
+ "ma2 = 3.\n",
+ "\t\t\t\n",
+ "# Calculations\n",
+ "w3 = (ma1*w1 + ma2*w2)/(ma1+ma2)\n",
+ "Tdb3 = 82. \t\t\t#F\n",
+ "TWb3 = 74.55 \t\t\t#F\n",
+ "phi3 = 70. \t \t\t#percent\n",
+ "\t\t\t\n",
+ "# Results\n",
+ "print \"relative humidity = %d percent\"%(phi3)\n",
+ "print \" Dry bulb temperature = %d F\"%(Tdb3)\n",
+ "print \" Wet bulb temperature = %.2f F\"%(TWb3)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "relative humidity = 70 percent\n",
+ " Dry bulb temperature = 82 F\n",
+ " Wet bulb temperature = 74.55 F\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 08:37:35 +0000