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diff --git a/Mechanical_Engineering_Thermodynamics_by_Mooney_D_A/Chapter_25.ipynb b/Mechanical_Engineering_Thermodynamics_by_Mooney_D_A/Chapter_25.ipynb new file mode 100755 index 00000000..8b36d41a --- /dev/null +++ b/Mechanical_Engineering_Thermodynamics_by_Mooney_D_A/Chapter_25.ipynb @@ -0,0 +1,294 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 25 - Air - Water Vapor Mixtures"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1 - Pg 482"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the specific humidity and dew temperature\n",
+ "#initialization of varaibles\n",
+ "Pg=0.4298 #steam tables psi\n",
+ "phi=0.5\n",
+ "P=14.7 #psi\n",
+ "#calculations\n",
+ "pw=phi*Pg\n",
+ "Pa=P-pw\n",
+ "gamma=0.622*pw/Pa\n",
+ "T=55 #F from dew point tables \n",
+ "#results\n",
+ "print '%s %.5f %s' %(\"Specific humidity =\",gamma,\"lb water/lb dry air\")\n",
+ "print '%s %d %s' %(\"\\n Dew temperature =\",T,\"F\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Specific humidity = 0.00923 lb water/lb dry air\n",
+ "\n",
+ " Dew temperature = 55 F\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2 - Pg 486"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the enthalpy, relative and specific humidities, Dew point temperature of the liquid\n",
+ "#initialization of varaibles\n",
+ "print '%s' %(\"From psychrometric chart ,\")\n",
+ "hgdp=1061.8 \n",
+ "cpw=0.44\n",
+ "tdb=72 #F\n",
+ "cp=0.24\n",
+ "g=0.0071\n",
+ "#calculations\n",
+ "rh=0.42\n",
+ "sp=g\n",
+ "tdp=58 #F\n",
+ "hw=hgdp+cpw*tdb\n",
+ "h=cp*tdb+g*hw\n",
+ "#results\n",
+ "print '%s %.2f %s' %(\"Enthalpy =\",h,\" B/lb dry air\")\n",
+ "print '%s %.2f' %(\"\\n relative humidity = \",rh)\n",
+ "print '%s %.2f' %(\"\\n specific humidity = \",sp)\n",
+ "print '%s %d %s' %(\"\\n Dew point temperature =\",tdp,\"F\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From psychrometric chart ,\n",
+ "Enthalpy = 25.04 B/lb dry air\n",
+ "\n",
+ " relative humidity = 0.42\n",
+ "\n",
+ " specific humidity = 0.01\n",
+ "\n",
+ " Dew point temperature = 58 F\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3 - Pg 488"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the water and heat to be supplied\n",
+ "#initialization of varaibles\n",
+ "print '%s' %(\"From the psychrometric chart,\")\n",
+ "ha=12.9 #B/lb\n",
+ "g1=0.0032 #lb water/ lb dry air\n",
+ "g2=0.0078 #lb water/ lb dry air\n",
+ "hl=13 #B/lb\n",
+ "hd=25.33 #B/lb\n",
+ "p=14.7 #psia\n",
+ "phi=0.6\n",
+ "cp=0.24\n",
+ "t2=70 #F\n",
+ "#calculations\n",
+ "wl=g2-g1\n",
+ "Q=hd-ha-wl*hl\n",
+ "pg=0.1217 #psia\n",
+ "pa=p-pg\n",
+ "G1=0.622*pg*phi/pa\n",
+ "G2=0.00788\n",
+ "wl2=G2-G1\n",
+ "t1=40 #F\n",
+ "hw1=1061.8 + 0.44*t1\n",
+ "hw2=1092.6 #B/lb\n",
+ "Q2=cp*(t2-t1) + G2*hw2 -G1*hw1 - wl2*hl\n",
+ "#results\n",
+ "print '%s' %(\"Method 1\")\n",
+ "print '%s %.4f %s' %(\"\\n Water to be supplied =\",wl,\"lb/lb of dry air\")\n",
+ "print '%s %.1f %s' %(\"\\n heat supplied =\",Q,\"B/lb of dry air\")\n",
+ "print '%s' %(\"\\n Method 2\")\n",
+ "print '%s %.5f %s' %(\"\\n Water to be supplied =\",wl2,\"lb/lb of dry air\")\n",
+ "print '%s %.1f %s' %(\"\\n heat supplied =\",Q2,\"B/lb of dry air\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From the psychrometric chart,\n",
+ "Method 1\n",
+ "\n",
+ " Water to be supplied = 0.0046 lb/lb of dry air\n",
+ "\n",
+ " heat supplied = 12.4 B/lb of dry air\n",
+ "\n",
+ " Method 2\n",
+ "\n",
+ " Water to be supplied = 0.00476 lb/lb of dry air\n",
+ "\n",
+ " heat supplied = 12.4 B/lb of dry air\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 4 - Pg 489"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the air supplied, temperature and humidity of air\n",
+ "#initialization of varaibles\n",
+ "print '%s' %(\"From psychrometric charts,\")\n",
+ "e=0.7\n",
+ "phi=0.5\n",
+ "g1=0.0131 #lb water/lb dry air\n",
+ "h1=32.36 #B/lb of dry air\n",
+ "g3=0.0073\n",
+ "h3=24.26 #B/lb\n",
+ "pg=0.3390 #psia\n",
+ "T3=528 #R\n",
+ "V3=1000\n",
+ "Rw=85.8\n",
+ "#calculations\n",
+ "pw3=phi*pg\n",
+ "ww3=pw3*144*V3/(Rw*T3)\n",
+ "wa3=ww3/g3\n",
+ "wa1=phi*wa3\n",
+ "wa2=phi*wa3\n",
+ "ww1=g1*wa1\n",
+ "ww2=ww3-ww1\n",
+ "g2=ww2/wa2\n",
+ "h2=(wa3*h3-wa1*h1)/wa2\n",
+ "tdb=61 #F\n",
+ "#results\n",
+ "print '%s %.3f %s' %(\"Air supplied =\",ww2,\"lb/min\")\n",
+ "print '%s %d %s' %(\"\\n temperature =\",tdb,\"F\")\n",
+ "print '%s %.5f %s' %(\"\\n Humidity =\",g2,\"lb water/lb dry air\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From psychrometric charts,\n",
+ "Air supplied = 0.055 lb/min\n",
+ "\n",
+ " temperature = 61 F\n",
+ "\n",
+ " Humidity = 0.00150 lb water/lb dry air\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5 - Pg 493"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the cooling temperature, heat transfer and fraction of heat removed\n",
+ "#initialization of varaibles\n",
+ "print '%s' %(\"From psychrometric charts,\")\n",
+ "g1=0.0131 #lb water/lb dry air\n",
+ "g2=0.0093 #lb water/lb dry air\n",
+ "h1=32.36 #B/lb dry air\n",
+ "h2=27.03\n",
+ "hd2=23.4 #B/lb dry air\n",
+ "hf=23.4 #B/lb dry air\n",
+ "hw1=1094.5\n",
+ "#calculations\n",
+ "tdp=55.3 #F\n",
+ "wratio=g1-g2\n",
+ "Qc=hd2-h1+wratio*hf\n",
+ "Qh=h2-hd2\n",
+ "Heat=wratio*(hw1-hf)\n",
+ "frac=-Heat/Qc\n",
+ "#results\n",
+ "print '%s %.1f %s' %(\"Cooling temperature = \",tdp,\"F\")\n",
+ "print '%s %.2f %s' %(\"\\n heat transfer = \",Heat,\"B/lb dry air\")\n",
+ "print '%s %.2f' %(\"\\n Fraction of heat removed =\",frac)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From psychrometric charts,\n",
+ "Cooling temperature = 55.3 F\n",
+ "\n",
+ " heat transfer = 4.07 B/lb dry air\n",
+ "\n",
+ " Fraction of heat removed = 0.46\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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