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{
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"name": "",
"signature": "sha256:84e452258bd05b64c16351467c4970051f4494cb47d7a832df03bdce07abddb8"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter1-Introduction"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg9"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import math\n",
" #determine\n",
"##This numerical is Ex 1_1E,page 9.\n",
"Pso=20.5\n",
"Psc=20.5*550##converting hp to fps system\n",
"Qo=385.\n",
"Qc=385./449.##converting gpm to ft^3/s\n",
"E=0.83\n",
"dp=E*Psc/(Qc*144.)\n",
"print\"%s %.2f %s \"%('The pressure rise is ',dp,' psi')\n",
"print(\"After rounding off,pressure rise is 75.8 psi\")\n",
"dpr=75.8\n",
"dHw=75.8*144/62.4##62.4 is accelaration due to gravity in fps system\n",
"print\"%s %.2f %s \"%(' The head of water is ',dHw,' ft of water')\n",
"print(\"After rounding off the value of head of water the answer is 175 ft of water.\")\n",
"dhwr=175##rounded off value of head of water\n",
"sg=0.72##specific gravity of oil\n",
"dHo=dhwr/sg\n",
"print\"%s %.2f %s \"%(' The head of oil is ',dHo,' ft of oil')\n",
"print(\"After rounding off the value of head of oil the answer is 243 ft of oil.\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The pressure rise is 75.79 psi \n",
"After rounding off,pressure rise is 75.8 psi\n",
" The head of water is 174.92 ft of water \n",
"After rounding off the value of head of water the answer is 175 ft of water.\n",
" The head of oil is 243.06 ft of oil \n",
"After rounding off the value of head of oil the answer is 243 ft of oil.\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg10"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math \n",
"#determine\n",
"##This numerical is Ex 1_1S,page 10.\n",
"E=0.83##efficiency\n",
"Ps=15300.\n",
"Q=87.4\n",
"Qs=87.4/3600.##flow rate in meter cube per sec\n",
"rho=998.\n",
"g=9.81\n",
"sg=0.72\n",
"dp=E*Ps/Qs\n",
"print\"%s %.2f %s \"%('\\n The change in pressure (dp)is ',dp,'')\n",
"dpr=523000##rounded value of dp\n",
"print(\"The rounded off value of dp is 523kPa.\")\n",
"dHw=dpr/(rho*g)\n",
"print\"%s %.2f %s \"%(' dHw is equal to ',dHw,' m of water')\n",
"print(\"The rounded off value of dHw is 53.4 m of water.\")\n",
"dHwr=53.4##rounded off value of dHw\n",
"print(\"Thus we can determine head of oil.\")\n",
"dHoil=dHwr/sg\n",
"print\"%s %.2f %s \"%(' dHoil is given by ',dHoil,' m of oil')\n",
"print(\"The rounded off value of dHoil is 74.2 m of oil.\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
" The change in pressure (dp)is 523070.94 \n",
"The rounded off value of dp is 523kPa.\n",
" dHw is equal to 53.42 m of water \n",
"The rounded off value of dHw is 53.4 m of water.\n",
"Thus we can determine head of oil.\n",
" dHoil is given by 74.17 m of oil \n",
"The rounded off value of dHoil is 74.2 m of oil.\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg10"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#determine\n",
"##This numerical is Ex 1_2E,page 10.\n",
"Q=12000.\n",
"A=3.5\n",
"rho_a=0.0762\n",
"E=0.85\n",
"r=2.5##resistance of duct system\n",
"V=Q/(60.*A)\n",
"print\"%s %.2f %s \"%('The air flow velocity at discharge is ',V,' ft/s')\n",
"KE=(rho_a*(V**2))/(32.2*2)\n",
"print\"%s %.2f %s \"%('\\n The product is ',KE,' lb/ft^2')\n",
"##PE=KE\n",
"Hv=KE/62.4\n",
"print\"%s %.2f %s \"%('\\n The dynamic head is ',Hv,' ft')\n",
"print(\"The value of dynamic head in inches of water is 0.74.\")\n",
"Hvi=0.74##Head in inches\n",
"Ht=r+Hvi\n",
"print\"%s %.2f %s \"%('\\n The total head is ',Ht,' inches of water')\n",
"p_tot=Ht*62.4\n",
"Ps=Q*p_tot/(60.*12.*E)\n",
"print\"%s %.2f %s \"%('\\n The shaft power is ',Ps,' ft-lb/s')\n",
"print(\"The shaft power is 7.2 hp.\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The air flow velocity at discharge is 57.14 ft/s \n",
"\n",
" The product is 3.86 lb/ft^2 \n",
"\n",
" The dynamic head is 0.06 ft \n",
"The value of dynamic head in inches of water is 0.74.\n",
"\n",
" The total head is 3.24 inches of water \n",
"\n",
" The shaft power is 3964.24 ft-lb/s \n",
"The shaft power is 7.2 hp.\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex4-pg11"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"##This numerical is Ex 1_2S,page 11.\n",
"Q=340.\n",
"A=0.325\n",
"V=Q/(60.*A)\n",
"print\"%s %.2f %s \"%('The air flow velocity at discharge is ',V,' m/s')\n",
"rho_a=1.22\n",
"Vr=17.4\n",
"Hd=(rho_a*(Vr**2))/2.\n",
"print\"%s %.2f %s \"%('\\n The dynamic pressure head is ',Hd,' Pa')\n",
"Hdr=184.7##rounded off value of Hd\n",
"rho_w=998.##density of water=rhow\n",
"g=9.81\n",
"H=0.0635\n",
"dp=rho_w*g*H##static pressure head\n",
"print\"%s %.2f %s \"%('\\n The static pressure head is ',dp,' Pa')\n",
"dpr=621.7\n",
"p_tot=Hdr+dpr\n",
"print\"%s %.2f %s \"%('\\n The total pressure head is ',p_tot,' Pa')\n",
"p_tot=806.4\n",
"E=0.85##efficiency\n",
"Ps=Q*p_tot/(60*E)\n",
"print\"%s %.2f %s \"%('\\n The shaft power is',Ps, 'W')\n",
"print(\"The shaft power is 5.376 kW.\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The air flow velocity at discharge is 17.44 m/s \n",
"\n",
" The dynamic pressure head is 184.68 Pa \n",
"\n",
" The static pressure head is 621.69 Pa \n",
"\n",
" The total pressure head is 806.40 Pa \n",
"\n",
" The shaft power is 5376.00 W \n",
"The shaft power is 5.376 kW.\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex5-pg11"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#determine \n",
"import math\n",
"##This numerical is Ex 1_3E,page 11.\n",
"H=295.##net head in ft\n",
"Q=148.##water flow rate\n",
"n=1800.##rpm\n",
"E=0.87##efficiency\n",
"a=62.4##product of density and accelaration due to gravity\n",
"omega=(n*2.*math.pi)/60.\n",
"dp=a*H\n",
"print\"%s %.2f %s \"%('The pressure is ',dp,' lb/ft^2')\n",
"Ps=E*Q*dp\n",
"print\"%s %.2f %s \"%('\\n Output power is equal to ',Ps,' lb-ft/s')\n",
"print(\"The output output power can also be written as 2.37*10^6 lb-ft/s\")\n",
"print(\"Output power in terms of horsepower is given by 4309hp.\")\n",
"Psr=2370000##rounded off value of Ps\n",
"Torque=Psr/omega\n",
"print\"%s %.2f %s \"%(' The output torque is ',Torque,' lb-ft.')\n",
"print(\"The output torque can also be written as 12.57*10^3 lb-ft\")\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The pressure is 18408.00 lb/ft^2 \n",
"\n",
" Output power is equal to 2370214.08 lb-ft/s \n",
"The output output power can also be written as 2.37*10^6 lb-ft/s\n",
"Output power in terms of horsepower is given by 4309hp.\n",
" The output torque is 12573.24 lb-ft. \n",
"The output torque can also be written as 12.57*10^3 lb-ft\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6-pg12"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#determine c\n",
"import math\n",
"##This numerical is Ex 1_3S,page 12.\n",
"H=90.\n",
"Q=4.2##water flow rate(in m^3/s)\n",
"n=1800.\n",
"E=0.87##efficiency\n",
"rho=998.\n",
"g=9.81\n",
"omega=(n*2.*math.pi)/60.\n",
"dp=rho*g*H\n",
"print\"%s %.2f %s \"%('The pressure is ',dp,' N/m^2')\n",
"Ps=E*Q*dp\n",
"print\"%s %.2f %s \"%('\\n Output power is equal to ',Ps,' N-m/s')\n",
"print(\"After rounding off the value of output power is 3220 kW.\")\n",
"Psr=3220000.##rounded off value of Ps\n",
"Torque=Psr/omega\n",
"print\"%s %.2f %s \"%(' The output torque is ',Torque,' N-m.')\n",
"print(\"After rounding off the output torque comes out to be 17.1*10^3 N-m.\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The pressure is 881134.20 N/m^2 \n",
"\n",
" Output power is equal to 3219664.37 N-m/s \n",
"After rounding off the value of output power is 3220 kW.\n",
" The output torque is 17082.63 N-m. \n",
"After rounding off the output torque comes out to be 17.1*10^3 N-m.\n"
]
}
],
"prompt_number": 7
}
],
"metadata": {}
}
]
}
|
