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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
" Chapter 1:Introduction"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.1 , Page no:5"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Variable declaration\n",
"v=28.8*10**-6; #the viscosity of water at 100 degree Celsius in kgf s/m^2\n",
"g=9.81; #Acceleration due to gravity in m/s^2\n",
"\n",
"#calculations\n",
"v=28.8*10**-6*g; # Conversion of unit\n",
"\n",
"#result\n",
"print (\"The viscosity of water at 100 degree Celsius = {:.4e}\".format(v)),\"N s/m^2 (or kg/m s)\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The viscosity of water at 100 degree Celsius = 2.8253e-04 N s/m^2 (or kg/m s)\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.2, Page no:14"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#variable declaration\n",
"i=950; # radiation flux [W/m^ 2 ]\n",
"A=1.5; # area [m^ 2 ]\n",
"Ti=61; # inlet temperature\n",
"To=69; # outlet temperature\n",
"m=1.5; # mass flow rate\n",
"M=1.5/60; # kg/sec\n",
"Qconductn=50; # W\n",
"t=0.95; # transmissivity\n",
"a=0.97; # absoptivity\n",
"Cp=4183; # J/kg K\n",
"\n",
"#calculations\n",
"q=M*Cp*(To-Ti); # heat gain rate\n",
"n=q/(i*A); # thermal efficiency\n",
"n_percent=n*100; # thermal efficiency\n",
"Qreradiated=(i*A*t*a)-Qconductn-q; # rate at which energy is lost by re-radiation\n",
"\n",
"#result\n",
"print \"Useful heat gain rate is \",round(q,4),\"W\"\n",
"print \"Thermal efficiency is\",'%.4E'%n,\"i.e\",round(n_percent,3),\"%\"\n",
"print \"The rate at which energy is lost by re-radiation and convection is \", round(Qreradiated,6),\"W\"\n",
" \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Useful heat gain rate is 836.6 W\n",
"Thermal efficiency is 5.8709E-01 i.e 58.709 %\n",
"The rate at which energy is lost by re-radiation and convection is 426.5375 W\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1.3, Page no:16"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#variable declaration\n",
"vi=10; # velocity at inlet in m/s\n",
"q=1000; # heat in w\n",
"di=0.04; # inside diameter in m\n",
"do=0.06; # outside diameter in m\n",
"den1=0.946; # density in kg/m^3 at 100 degree C\n",
"Cp=1009; # specific heat in J/kg k\n",
"den2=0.773; # specific heat at To=183.4 degree C\n",
"\n",
"#calculations\n",
"m=den1*(3.14/4)*(di**2)*vi; # kg/s\n",
"dh=q/m; # j/kg\n",
"To=dh/Cp+100; # Exit Temperature\n",
"vo=m/(den2*(3.14/4)*(do)**2); # Exit velocity \n",
"dKeKg=(vo**2-vi**2)/2; # Change in Kinetic Energy per kg\n",
"\n",
"#result\n",
"print \"Exit Temperature is\",round(To,4),\"degree C\"\n",
"print \"Exit velocity is \",round(vo,4),\"m/s\"\n",
"print \"Change in Kinetic Energy per kg =\",round(dKeKg,5),\"J/kg\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Exit Temperature is 183.4119 degree C\n",
"Exit velocity is 5.4391 m/s\n",
"Change in Kinetic Energy per kg = -35.20795 J/kg\n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
