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diff --git a/Thermodynamics_for_Engineers/Chapter_22_3.ipynb b/Thermodynamics_for_Engineers/Chapter_22_3.ipynb deleted file mode 100755 index d43c8cae..00000000 --- a/Thermodynamics_for_Engineers/Chapter_22_3.ipynb +++ /dev/null @@ -1,333 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:4ce5546be38472485072968c27d4c6ae7f7b124c1af2a44e7388dbd36c855f4b"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chapter 22 - Refrigeration"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 1 - Pg 476"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the refrigerator and heat pump cp values in both cases\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",
- "print '%s %.1f' %(\"In case 1, Refrigerator cp = \",cp1)\n",
- "print '%s %.1f' %(\"\\n In case 1, Heat pump cp = \",cp2)\n",
- "print '%s %.3f' %(\"\\n In case 2, Refrigerator cp = \",cp3)\n",
- "print '%s %.3f' %(\"\\n In case 2, Heat pump cp = \",cp4)\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "In case 1, Refrigerator cp = 20.2\n",
- "\n",
- " In case 1, Heat pump cp = 21.2\n",
- "\n",
- " In case 2, Refrigerator cp = 0.867\n",
- "\n",
- " In case 2, Heat pump cp = 1.867\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 2 - Pg 479"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the coefficient of performance in wet and dry compression\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",
- "print '%s %.3f' %(\"\\n Coefficient of performance in wet compression = \",cp1)\n",
- "print '%s %.3f' %(\"\\n Coefficient of performance in dry compression = \",cp2)\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "\n",
- " Coefficient of performance in wet compression = 5.654\n",
- "\n",
- " Coefficient of performance in dry compression = 5.688\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3 - Pg 480"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the tonnage value in both cases\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",
- "print '%s %.1f %s' %(\"In case 1,Tonnage =\",tonnage,\" tons\")\n",
- "print '%s %.2f %s' %(\"\\n In case 2,Tonnage =\",tonnage2,\" tons\")\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "In case 1,Tonnage = 73.0 tons\n",
- "\n",
- " In case 2,Tonnage = 12.37 tons\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 4 - Pg 481"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the refirgeration, shaft hp and cop\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",
- "print '%s %.1f %s' %(\"Refrigeration =\",ref,\" tons\")\n",
- "print '%s %.1f %s' %(\"\\n Shaft hp=\",shp,\" hp\")\n",
- "print '%s %.2f' %(\"\\n Coefficient of performance = \",cop)\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Refrigeration = 20.1 tons\n",
- "\n",
- " Shaft hp= 30.4 hp\n",
- "\n",
- " Coefficient of performance = 3.13\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 5 - Pg 488"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the cop\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",
- "print '%s %.2f' %(\"Coefficient of performace = \",cop)\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Coefficient of performace = 5.07\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 6 - Pg 493"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the power required\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",
- "print '%s %.2f %s' %(\"Power = \",power,\" hp\")\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Power = 3.82 hp\n"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 7 - Pg 493"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#calculate the power required\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",
- "print '%s %.1f %s' %(\"Power =\",power,\" hp\")\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Power = 11.6 hp\n"
- ]
- }
- ],
- "prompt_number": 8
- }
- ],
- "metadata": {}
- }
- ]
-}
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