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| author | hardythe1 | 2015-06-03 15:27:17 +0530 |
|---|---|---|
| committer | hardythe1 | 2015-06-03 15:27:17 +0530 |
| commit | 47d7279a724246ef7aa0f5359cf417992ed04449 (patch) | |
| tree | c613e5e4813d846d24d67f46507a6a69d1a42d87 /Elements_of_Thermodynamics_and_heat_transfer/Chapter_12.ipynb | |
| parent | 435840cef00c596d9e608f9eb2d96f522ea8505a (diff) | |
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diff --git a/Elements_of_Thermodynamics_and_heat_transfer/Chapter_12.ipynb b/Elements_of_Thermodynamics_and_heat_transfer/Chapter_12.ipynb new file mode 100755 index 00000000..e7d6658a --- /dev/null +++ b/Elements_of_Thermodynamics_and_heat_transfer/Chapter_12.ipynb @@ -0,0 +1,203 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:fb635a7892259910462c375c5cd6000ddf39095d8593a85d6b876d44f34c4760"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 12 - Non steady flow, friction and availability"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1 - Pg 210"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the work done\n",
+ "#Initialization of variables\n",
+ "p1=100 #psia\n",
+ "p2=14.7 #psia\n",
+ "k=1.4\n",
+ "T1=700 #R\n",
+ "R=10.73/29.\n",
+ "V=50\n",
+ "cv=0.171\n",
+ "cp=0.24\n",
+ "R2=1.986/29.\n",
+ "#calculations\n",
+ "T2=T1/ (p1/p2)**((k-1)/k)\n",
+ "m1=p1*V/(R*T1)\n",
+ "m2=p2*V/(R*T2)\n",
+ "Wrev= cv*(m1*T1 - m2*T2) - (m1-m2)*(T2)*cp\n",
+ "#results\n",
+ "print '%s %d %s' %(\"Work done in case 1 =\",Wrev,\"Btu\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Work done in case 1 = 572 Btu\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2 - Pg 212"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Engine efficiency and Effectiveness\n",
+ "#Initialization of variables\n",
+ "p1=400 #psia\n",
+ "t1=600 #F\n",
+ "h1=1306.9 #Btu/lbm\n",
+ "b1=480.9 #Btu/lbm\n",
+ "p2=50 #psia\n",
+ "h2=1122 #Btu/lbm\n",
+ "h3=1169.5 #Btu/lbm\n",
+ "b3=310.9 #Btu/lbm\n",
+ "#calculations\n",
+ "print '%s' %(\"All the values are obtained from Mollier chart,\")\n",
+ "dw13=h1-h3\n",
+ "dw12=h1-h2\n",
+ "dasf=b3-b1\n",
+ "etae=dw13/dw12*100\n",
+ "eta=abs(dw13/dasf)*100\n",
+ "dq=dw13+dasf\n",
+ "#results\n",
+ "print '%s %.1f %s' %(\"Engine efficiency =\",etae,\" percent\")\n",
+ "print '%s %.1f %s' %(\"\\n Effectiveness =\",eta,\" percent\")\n",
+ "print '%s %.1f %s' %(\"\\n Loss of available energy =\",dq,\" Btu/lbm\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "All the values are obtained from Mollier chart,\n",
+ "Engine efficiency = 74.3 percent\n",
+ "\n",
+ " Effectiveness = 80.8 percent\n",
+ "\n",
+ " Loss of available energy = -32.6 Btu/lbm\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3 - Pg 214"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the friction of the process per pound of air\n",
+ "#Initialization of variables\n",
+ "p1=100. #psia\n",
+ "p2=10. #psia\n",
+ "n=1.3\n",
+ "T1=800. #R\n",
+ "cv=0.172\n",
+ "R=1.986/29\n",
+ "#calculations\n",
+ "T2=T1*(p2/p1)**((n-1)/n)\n",
+ "dwir=cv*(T1-T2)\n",
+ "dwr=R*(T2-T1)/(1-n)\n",
+ "dq=dwr-dwir\n",
+ "#results\n",
+ "print '%s %.1f %s' %(\"The friction of the process per pound of air =\",dq,\" Btu/lbm\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The friction of the process per pound of air = 18.6 Btu/lbm\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 4 - Pg 215"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the Friction\n",
+ "#Initialization of variables\n",
+ "ms=10 #lbm\n",
+ "den=62.3 #lbm/ft^3\n",
+ "A1=0.0218 #ft^2\n",
+ "A2=0.00545 #ft^2\n",
+ "p2=50. #psia\n",
+ "p1=100. #psia\n",
+ "gc=32.2 #ft/s^2\n",
+ "dz=30. #ft\n",
+ "#calculations\n",
+ "V1=ms/(A1*den)\n",
+ "V2=ms/(A2*den)\n",
+ "df=-144./den*(p2-p1) - (V2**2 -V1**2)/(2*gc) - dz\n",
+ "#results\n",
+ "print '%s %.1f %s' %(\"Friction =\",df,\"ft-lbf/lbm\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Friction = 72.9 ft-lbf/lbm\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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