From d36fc3b8f88cc3108ffff6151e376b619b9abb01 Mon Sep 17 00:00:00 2001 From: kinitrupti Date: Fri, 12 May 2017 18:40:35 +0530 Subject: Revised list of TBCs --- Thermodynamics_for_Engineers/Chapter_21_2.ipynb | 438 ------------------------ 1 file changed, 438 deletions(-) delete mode 100755 Thermodynamics_for_Engineers/Chapter_21_2.ipynb (limited to 'Thermodynamics_for_Engineers/Chapter_21_2.ipynb') diff --git a/Thermodynamics_for_Engineers/Chapter_21_2.ipynb b/Thermodynamics_for_Engineers/Chapter_21_2.ipynb deleted file mode 100755 index 567cdacb..00000000 --- a/Thermodynamics_for_Engineers/Chapter_21_2.ipynb +++ /dev/null @@ -1,438 +0,0 @@ -{ - "metadata": { - "name": "", - "signature": "sha256:6b7b3e2ab4fd666f452b57925a83681d6f79a5b142e4777bdab089506c8a15bb" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "Chapter 21 - Steam Turbines" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 1 - Pg 456" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the flow rate\n", - "#Initalization of variables\n", - "import math\n", - "p2=190. #psia\n", - "p1=110. #psia\n", - "v1=2.456 \n", - "k=1.3\n", - "J=778.\n", - "A2=1.2 #in^2\n", - "#calculations\n", - "v2=v1*math.pow(p2/p1,(1/k))\n", - "dh=k/(k-1) *144/J *(p2*v1-p1*v2)\n", - "Vex=223.8*math.sqrt(dh)\n", - "m=A2*Vex/(144.*v2)\n", - "#results\n", - "print '%s %.2f %s' %(\"Rate of flow =\",m,\"lb/sec\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Rate of flow = 3.32 lb/sec\n" - ] - } - ], - "prompt_number": 1 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 2 - Pg 458" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the rate of flow\n", - "#Initalization of variables\n", - "import math\n", - "h1=1205.8 #Btu/lb\n", - "s2=1.5594\n", - "sf=1.5948\n", - "sfg=1.1117\n", - "hf=1188.9 #Btu/lb\n", - "hfg=883.2 #Btu/lb\n", - "vf=4.049\n", - "vfg=vf-0.018\n", - "k=1.3\n", - "J=778\n", - "A2=1.2 #in^2\n", - "#calculations\n", - "x2=-(s2-sf)/sfg\n", - "h2=hf-x2*hfg\n", - "v2=vf-x2*vfg\n", - "dh=h1-h2\n", - "Vex=223.8*math.sqrt(dh)\n", - "m=A2*Vex/(144*v2)\n", - "#results\n", - "print '%s %.2f %s' %(\"Rate of flow =\",m,\"lb/sec\")\n", - "\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Rate of flow = 3.19 lb/sec\n" - ] - } - ], - "prompt_number": 2 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 3 - Pg 462" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the blade work, angle and efficiency\n", - "#Initalization of variables\n", - "import math\n", - "alp=14*math.pi/180. #degrees\n", - "vb=900. #ft/s\n", - "v1=2200. #ft/s\n", - "g=32.17 #ft/s^2\n", - "#calculations\n", - "vrc=v1*math.cos(alp) - vb\n", - "W=(2*vrc)/g *vb\n", - "eta=W/(v1*v1/ (2*g)) *100.\n", - "bet=math.atan(v1*math.sin(alp) /vrc)*180/math.pi\n", - "#results\n", - "print '%s %d %s' %(\"Blade work =\",W,\" ft-lb/lb\")\n", - "print '%s %.1f %s' %(\"\\n Efficiency =\",eta,\" percent\")\n", - "print '%s %.1f %s' %(\"\\n Blade angle =\",bet,\" degrees\")\n", - "print '%s' %('The answers are a bit different due to rounding off error')\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Blade work = 69082 ft-lb/lb\n", - "\n", - " Efficiency = 91.8 percent\n", - "\n", - " Blade angle = 23.3 degrees\n", - "The answers are a bit different due to rounding off error\n" - ] - } - ], - "prompt_number": 3 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 4 - Pg 463" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the blade work and efficiency\n", - "#Initalization of variables\n", - "import math\n", - "v1=1234. #ft/s\n", - "v2=532. #ft/s \n", - "kb=0.92\n", - "alp=20. #degrees\n", - "ve=900. #ft/s\n", - "r=2200. #ft/s\n", - "g=32.17 #ft/s^2\n", - "#calculations\n", - "vr=math.sqrt(v1*v1 +v2*v2)\n", - "vr2=vr*kb\n", - "vrc=vr2*math.cos(alp*math.pi/180.)\n", - "W=(v1+vrc)*ve/g\n", - "eta=W/(r*r /(2*g)) *100.\n", - "#results\n", - "print '%s %d %s' %(\"Blade work =\",W,\"ft-lb/lb\")\n", - "print '%s %.1f %s' %(\"\\n Efficiency =\",eta,\" percent\")\n", - "print '%s' %('The answers are a bit different due to rounding off error')\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Blade work = 67023 ft-lb/lb\n", - "\n", - " Efficiency = 89.1 percent\n", - "The answers are a bit different due to rounding off error\n" - ] - } - ], - "prompt_number": 4 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 5 - Pg 464" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the blade reheat in both cases\n", - "#Initalization of variables\n", - "import math\n", - "v1=1234.\n", - "v2=532.\n", - "kb=0.92\n", - "alp=20*math.pi/180. #degrees\n", - "ve=900.\n", - "r=2200. #ft/s\n", - "g=32.17 #ft/s^2\n", - "J=778.\n", - "w=67000.\n", - "#calculations\n", - "vr=math.sqrt(v1*v1 +v2*v2)\n", - "vr2=vr*kb\n", - "vrc=vr2*math.cos(alp)\n", - "reheat=(vr*vr - vr2*vr2 )/(2*g*J)\n", - "v22=math.sqrt((vrc-ve)*(vrc-ve) +(vr2*math.sin(alp))*(vr2*math.sin(alp)))\n", - "ein=r*r /(2*g*J)\n", - "eout=w/J + v22*v22 /(2*g*J)\n", - "re2=ein-eout\n", - "#results\n", - "print '%s %.2f %s' %(\"\\n In case 1, Blade reheat =\",reheat,\"Btu/lb\")\n", - "print '%s %.1f %s' %(\"\\n In case 2, Blade reheat =\",re2,\" Btu/lb\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "\n", - " In case 1, Blade reheat = 5.54 Btu/lb\n", - "\n", - " In case 2, Blade reheat = 5.6 Btu/lb\n" - ] - } - ], - "prompt_number": 5 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 6 - Pg 467" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the intermediate pressure\n", - "#Initalization of variables\n", - "h1=1416.4\n", - "s1=1.6842\n", - "sf=1.7319\n", - "sfg=1.3962\n", - "fac=1.05\n", - "x2=0.7\n", - "#calculations\n", - "x6=-(s1-sf)/sfg\n", - "h6=1156.3 - x6*960.1\n", - "dh6=h1-h6\n", - "drop= fac*h6/2\n", - "h2=h1-drop\n", - "first=(1-x2)*drop\n", - "h3=1264.1 +first\n", - "h4=1157 #Btu/lb\n", - "fac2=(drop+153)/dh6\n", - "print '%s' %(\"From air charts,\")\n", - "p2=107 #psia\n", - "#results\n", - "print '%s %d %s' %(\"Intermediate pressure =\",p2,\"psia\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "From air charts,\n", - "Intermediate pressure = 107 psia\n" - ] - } - ], - "prompt_number": 6 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 7 - Pg 469" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the shaft ouput and engine efficiency\n", - "#Initalization of variables\n", - "import math\n", - "reh=1.047\n", - "dh6=292.8\n", - "x2=0.7\n", - "flow=98000 #lb/hr\n", - "loss=200 #hp\n", - "#calculations\n", - "intwork=reh*dh6*x2\n", - "inthp=intwork*flow/2544\n", - "sout=inthp-loss\n", - "swork=sout*2544/flow\n", - "seff=swork/290.1 *100\n", - "#results\n", - "print '%s %d %s' %(\"Shaft output =\",sout,\"hp\")\n", - "print '%s %.1f %s' %(\"\\n Shaft engine efficiency =\",seff,\"percent\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Shaft output = 8066 hp\n", - "\n", - " Shaft engine efficiency = 72.2 percent\n" - ] - } - ], - "prompt_number": 7 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 8 - Pg 469" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the exit temperature and pressure\n", - "#Initalization of variables\n", - "h1=1416.4 #Btu/lb\n", - "h2=214.5 #Btu/lb\n", - "#calculations\n", - "hexa=h1-h2\n", - "print '%s' %(\"From Air tables,\")\n", - "pe=20 #psia\n", - "te=321.5 #F\n", - "#results\n", - "print '%s %d %s' %(\"Exit Pressure =\",pe,\"psia\")\n", - "print '%s %.1f %s' %(\"\\n Exit temperature =\",te,\" F\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "From Air tables,\n", - "Exit Pressure = 20 psia\n", - "\n", - " Exit temperature = 321.5 F\n" - ] - } - ], - "prompt_number": 8 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 9 - Pg 470" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#calculate the steam rate required\n", - "#Initalization of variables\n", - "flow=98000. #lb/hr\n", - "loss=200. #hp\n", - "x= 0.11 #percent\n", - "shp=3000. #hp\n", - "#calculations\n", - "sflow = x*flow\n", - "sflow2= sflow + (flow-sflow)*shp/8060.\n", - "srate=sflow2/shp\n", - "#results\n", - "print '%s %.2f %s' %(\"Steam rate required =\",srate,\" lb/hp-hr\")\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "Steam rate required = 14.41 lb/hp-hr\n" - ] - } - ], - "prompt_number": 9 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit