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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 12 - Properties of Gaseous mixtures"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1 - Pg 201"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate the partial pressure and specific humidity\n",
"#initialization of varaibles\n",
"P=15. #psia\n",
"T2=70.+460 #R\n",
"T1=55.+460 #R\n",
"#calculations\n",
"pw=0.2141\n",
"pA=P-pw\n",
"mratio=pA*29/(pw*18.)\n",
"mAbym=mratio/(1+mratio)\n",
"mwbym=1/(1+mratio)\n",
"pg=0.3631 #psia\n",
"phi=pw/pg\n",
"gamma=1/mratio\n",
"#results\n",
"print '%s %.2f %s' %(\"Partial pressure of water vapor = \",pA,\"psia\")\n",
"print '%s %.4f %s' %(\"\\n Specific humidity = \",gamma,\"lb vapor/lb air\")\n",
"print '%s %.2f' %(\"\\n Relative humidity = \",phi)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Partial pressure of water vapor = 14.79 psia\n",
"\n",
" Specific humidity = 0.0090 lb vapor/lb air\n",
"\n",
" Relative humidity = 0.59\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2 - Pg 201"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#calculate the mass of watervapor per pound of dry air\n",
"#initialization of varaibles\n",
"rh=0.75\n",
"pg=0.5069\n",
"inc=10 #in\n",
"pA=29.50 #psia\n",
"#calculations\n",
"pw=rh*pg\n",
"p=(29.50+ inc/13.6)*0.491\n",
"pA=p-pw\n",
"mratio=pw*18/(pA*29.)\n",
"#results\n",
"print '%s %.4f %s' %(\"Pounds of water vapor enter the surface per pound of dry air =\",mratio,\"lb vapor/lb air\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Pounds of water vapor enter the surface per pound of dry air = 0.0163 lb vapor/lb air\n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
