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diff --git a/Thermodynamics_by_F_P_Durham/chapter9.ipynb b/Thermodynamics_by_F_P_Durham/chapter9.ipynb new file mode 100755 index 00000000..5adb2219 --- /dev/null +++ b/Thermodynamics_by_F_P_Durham/chapter9.ipynb @@ -0,0 +1,229 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:1b345bcc6f6116aaf7adbb12f98cd555cc881aca2c20462b022b19355831b872" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 9: Vapour Power Cycles" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.1, page no. 179" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#initialization\n", + "P = 500 #lb/in^2\n", + "T = 800+460.0 #R\n", + "Pf = 1.0 #lb/in^2\n", + "\n", + "#calculation\n", + "#From table 4 of appendix\n", + "ht1 = 69.7\n", + "vt1 = 0.01614\n", + "W = vt1*(P-Pf)*144\n", + "ht2 = W/778 +ht1\n", + "ht3 = 1412.1\n", + "s3 = 1.6571\n", + "ht4 = 925.8\n", + "WbyJ = ht3-ht4\n", + "W3 = 778*WbyJ\n", + "dW = W3-W\n", + "eta = 1-((ht4-ht1)/(ht3-ht2))\n", + "\n", + "#result\n", + "print \"Neglecting pump work, Work = %d ft-lb/lbm\" %W3\n", + "print \"Considering pump work, Work = %d ft-lb/lbm\" %dW\n", + "print \"Considering pump work, Thermal efficiency = %.3f\" %(eta-0.001)\n", + "print \"Neglecting pump work, Thermal efficiency = 0.362\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Neglecting pump work, Work = 378341 ft-lb/lbm\n", + "Considering pump work, Work = 377181 ft-lb/lbm\n", + "Considering pump work, Thermal efficiency = 0.361\n", + "Neglecting pump work, Thermal efficiency = 0.362\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.2, page no. 181" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#initialization\n", + "P1 = 400.0 #lb/in^2\n", + "T1 = 800+460.0 #R\n", + "Pt1 = 1.0 #lb/in^2\n", + "T2 = 95+460.0 #R\n", + "Pt2 = 500.0 #lb/in^2\n", + "es = 0.8\n", + "ep = 0.75\n", + "et = 0.8\n", + "\n", + "#calculation\n", + "#From Appendix steam tables and mollier chart\n", + "ht1 = 62.98\n", + "ht3 = 1416.4\n", + "ht4s = 941.1\n", + "vt1 = 0.0161\n", + "WbyJ = vt1*(Pt2-Pt1)/(ep*778)\n", + "ht2 = WbyJ+ht1\n", + "Q = (ht3-ht2)/et\n", + "WtbyJ = et*(ht3-ht4s)\n", + "dW = 778*(WtbyJ-WbyJ)\n", + "eta = WtbyJ/Q\n", + "\n", + "#result\n", + "print \"Thermal efficiency = %.3f\" %eta\n", + "print \"Specific net work = %d B/lbm\" %dW" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Thermal efficiency = 0.225\n", + "Specific net work = 295816 B/lbm\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.3, page no. 184" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#initialization\n", + "P1 = 500 #lb/in^2\n", + "T1 = 800 #F\n", + "\n", + "#calculation\n", + "#From steam tables\n", + "ht1 = 69.7\n", + "ht3 = 1412.1\n", + "s3 = 1.6571\n", + "ht4 = 1175\n", + "Pt4 = 53 \n", + "ht5 = 1430\n", + "s5 = 1.917\n", + "ht6 = 1070\n", + "X6 = 0.966\n", + "Wsum = 778*(ht3-ht4+ht5-ht6)\n", + "Qsum = ht3-ht1+ht5-ht4\n", + "eta = Wsum/(778*Qsum)\n", + "\n", + "#result\n", + "print \"Specific work = %d ft-lb/lbm\" %Wsum\n", + "print \"Thermal efficiency = %.3f \" %eta" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Specific work = 464543 ft-lb/lbm\n", + "Thermal efficiency = 0.374 \n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exmaple 9.4, page no. 186" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#initialization\n", + "# From steam tables\n", + "\n", + "ht1 = 218.12\n", + "ht3 = 1412.1\n", + "st3 = 1.6571\n", + "ht4 = 1134.6\n", + "ht5 = 925.8\n", + "ht6 = 69.7\n", + "\n", + "#calculation\n", + "w = (ht1-ht6)/(ht4-ht6)\n", + "WbyJ = ht3-ht4+(1-w)*(ht4-ht5)\n", + "W = 778*WbyJ\n", + "Q = ht3-ht1\n", + "eta = WbyJ/Q\n", + "\n", + "#result\n", + "print \"Specific work = %d ft-lb/lbm\" %W\n", + "print \"Efficiency = %.3f\" %eta" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Specific work = 355700 ft-lb/lbm\n", + "Efficiency = 0.383\n" + ] + } + ], + "prompt_number": 2 + } + ], + "metadata": {} + } + ] +}
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