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diff --git a/Thermodynamics_for_Engineers_by_J_S_Doolittle/22-Refrigeration.ipynb b/Thermodynamics_for_Engineers_by_J_S_Doolittle/22-Refrigeration.ipynb new file mode 100644 index 0000000..9b4e86d --- /dev/null +++ b/Thermodynamics_for_Engineers_by_J_S_Doolittle/22-Refrigeration.ipynb @@ -0,0 +1,277 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 22: Refrigeration" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.1: cop_calculations.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"t1=45+460 //R\n", +"th=70+460 //R\n", +"t2=-200+460 //R\n", +"th2=100+460 //R\n", +"//calculations\n", +"cp1=t1/(th-t1)\n", +"cp2=th/(th-t1)\n", +"cp3=t2/(th2-t2)\n", +"cp4=th2/(th2-t2)\n", +"//results\n", +"printf('In case 1, Refrigerator cp = %.1f',cp1)\n", +"printf('\n In case 1, Heat pump cp = %.1f',cp2)\n", +"printf('\n In case 2, Refrigerator cp = %.3f',cp3)\n", +"printf('\n In case 2, Heat pump cp = %.3f',cp4)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.2: cop_calculations.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"h3=85.282 //Btu/lb\n", +"s2=0.16392\n", +"sf=0.16798\n", +"//calculations\n", +"sfg=sf-0.023954\n", +"x3=-(s2-sf)/sfg\n", +"h2=78.335 - x3*67.651\n", +"h4=26.365 //Btu/lb\n", +"h1=h4\n", +"ref=h2-h1\n", +"work=h3-h2\n", +"cp1=ref/work\n", +"h2d=78.355\n", +"h1d=26.365 //Btu/lb\n", +"h3d=87.495 //Btu/lb\n", +"ref2=h2d-h1d\n", +"work2=h3d-h2d\n", +"cp2=ref2/work2\n", +"//results\n", +"printf('\n Coefficient of performance in wet compression = %.3f',cp1)\n", +"printf('\n Coefficient of performance in dry compression = %.3f',cp2)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.3: Tonnage_calculations.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"h1=24.973 //Btu/lb\n", +"h2=81.436 //Btu/lb\n", +"cfm=200 //cfm\n", +"v2=0.77357\n", +"v3=3.8750\n", +"h4=72.913\n", +"//calculations\n", +"mass=cfm/v2\n", +"ref=h2-h1\n", +"tonnage=mass*ref/cfm\n", +"mass2=cfm/v3\n", +"ref2=h4-h1\n", +"tonnage2=mass2*ref2/cfm\n", +"//results\n", +"printf('In case 1,Tonnage = %.1f tons',tonnage)\n", +"printf('\n In case 2,Tonnage = %.2f tons',tonnage2)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.4: Refrigeration_and_cop_calculation.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"h2d=93.410 //Btu/lb\n", +"h1=80.740 //Btu/lb\n", +"x=0.75\n", +"PD=160\n", +"vol=0.82\n", +"v1=1.7213\n", +"w2=80.156\n", +"w1=27.3\n", +"//calculations\n", +"twork=h2d-h1\n", +"swork=twork/x\n", +"flow=PD*vol/v1\n", +"ref=flow*(w2-w1)/200\n", +"shp= flow*swork/42.4\n", +"cop=(w2-w1)/swork\n", +"//results\n", +"printf('Refrigeration = %.1f tons',ref)\n", +"printf('\n Shaft hp= %.1f hp',shp)\n", +"printf('\n Coefficient of performance = %.2f ',cop)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.5: cop_calculatio.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"mc=3000 //lb\n", +"hv=1080.2 //Btu/lb\n", +"hfe=26.06 //Btu/lb\n", +"hfp=10.05 //Btu/lb\n", +"x=0.7\n", +"//calculations\n", +"mv=(mc*hfp-mc*hfe)/(hfe-hv)\n", +"dh=145.4 //Btu/lb\n", +"chp=dh*mv/(x*42.4)\n", +"cop=mc*(hfe-hfp)/(chp*42.4)\n", +"//results\n", +"printf('Coefficient of performace = %.2f ',cop)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.6: Power_calculatio.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"loss=80000 //Btu/lb\n", +"t=560 //R\n", +"//calculations\n", +"ratio=t/68\n", +"power=loss/(ratio*2544)\n", +"//results\n", +"printf('Power = %.2f hp',power)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 22.7: Power_calculatio.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc\n", +"clear\n", +"//Initalization of variables\n", +"loss=2*80000 //Btu/lb\n", +"tb=72 //F\n", +"to=12 //F\n", +"to2=42 //F\n", +"tf=104+460 //R\n", +"//calculations\n", +"ratio=tf/(tf-460)\n", +"power=loss/(2544*ratio)\n", +"//results\n", +"printf('Power = %.1f hp',power)" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |