From 5a3a66e158c99bbf7900278d8e7056136d628dbe Mon Sep 17 00:00:00 2001 From: root Date: Mon, 14 Jul 2014 15:31:28 +0530 Subject: adding books --- .../Chapter_04.ipynb | 651 +++++++++++++++++++++ 1 file changed, 651 insertions(+) create mode 100755 Basic_Electrical_Engineering_with_Numerical_Problems/Chapter_04.ipynb (limited to 'Basic_Electrical_Engineering_with_Numerical_Problems/Chapter_04.ipynb') diff --git a/Basic_Electrical_Engineering_with_Numerical_Problems/Chapter_04.ipynb b/Basic_Electrical_Engineering_with_Numerical_Problems/Chapter_04.ipynb new file mode 100755 index 00000000..d0d3219a --- /dev/null +++ b/Basic_Electrical_Engineering_with_Numerical_Problems/Chapter_04.ipynb @@ -0,0 +1,651 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:3d029ef4e834a5cd003571095b5e7fdf64f109f6f6e91dbd7ffcf37b297f5b62" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 4: Work Power and Energy" + ] + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.1: Page 61" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "I=11;# current in A\n", + "V1=55;# voltage in V\n", + "V2=220;# voltage in V\n", + "\n", + "#calculations\n", + "V=V2-V1;\n", + "R=V/I; \n", + "P=I**2*R;\n", + "\n", + "#Results\n", + "print \"(a)resistance,R = \", R,\" ohm\" \n", + "print \"(b)power lost,P = \",P,\" W\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a)resistance,R = 15.0 ohm\n", + "(b)power lost,P = 1815.0 W\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.2: Page 61" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "V=300;# voltage in volts\n", + "W=360;# power lost in one coil in watt\n", + "I=6; # current in A\n", + "\n", + "#calculations:\n", + "R1=V/I;\n", + "R=V**2/W;\n", + "a=(1/R1)-(1/R);\n", + "r2=1/a;\n", + "\n", + "#Results\n", + "print \"resistance of 360W coil1,R= \",R,\"ohm and \\n resistance of second coil2,r2=\",r2,\"ohm\" " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "resistance of 360W coil1,R= 250.0 ohm and \n", + " resistance of second coil2,r2= 62.5 ohm\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.3: Page 61" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "W1=100# in watt\n", + "E=110# in volts\n", + "W2=60# in watt\n", + "\n", + "#calculations:\n", + "I1=W1/E# current taken by 100 w lamp\n", + "I2=W2/E# current taken by 60W lamp\n", + "I=I1-I2;\n", + "R=E/I;\n", + "\n", + "#Results\n", + "print \"resistance,R =\", R,\" ohm\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "resistance,R = 302.5 ohm\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.4: Page 62" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "w=100;# in watt\n", + "V=220;# voltage in volts\n", + "\n", + "#calculations:\n", + "R1=V**2/w;\n", + "Rp=R1/2;# total resistance of the circuit\n", + "Ip=V/Rp;\n", + "Wp=Ip**2*Rp;\n", + "R2=V**2/w;\n", + "Rs=R1+R2;# total resistance of the circuit\n", + "Is=V/Rs;\n", + "Ws=Is**2*Rs;\n", + "\n", + "#Results\n", + "print \"(a)power in case of parallel,W = \",Wp,\"watts\"\n", + "print \"(b)power in case of series, W = \",Ws,\" Watts\" " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a)power in case of parallel,W = 200.0 watts\n", + "(b)power in case of series, W = 50.0 Watts\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.5: Page 63" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "V = 220; #voltage\n", + "l=300;# number of lamps\n", + "w1=60;# in watt\n", + "w2=40;# in watt\n", + "f=100;# number of fan\n", + "\n", + "# Calculations:\n", + "W1=w1*l;# wattage required for 300 lamps, 60 watt each\n", + "W2=w2*f# wattage required for 100 fans, 40 watt each\n", + "W=(W1+W2)*10**-3;\n", + "I=(W*1000)/V;\n", + "\n", + "#Results\n", + "print \"(a)total load,W = \",W,\" kW\" \n", + "print \"(b)current,I = \",I,\"A\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a)total load,W = 22.0 kW\n", + "(b)current,I = 100.0 A\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.6: Page 63" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given and Calculations:\n", + "nl=12#no. of lamps\n", + "wl=100#wattage of lamps\n", + "hl=6 #each lamps work 6 hours a days\n", + "nf=6 #no. of fans\n", + "wf=60#wattage of fans\n", + "hf=5 #each fans work 5 hours a days\n", + "nc=2 #no. of electric cookers\n", + "wc=1500#wattage of electric cookers\n", + "hc=4 #each electric cookers work 4 hours a days\n", + "ng=2 #no. of gysers\n", + "wg=1000#wattage of each gyser\n", + "hg=3 #each gyser works 3 hours a day\n", + "Ccg=40#IN PAISA\n", + "Ccg1=35#IN PAISA\n", + "\n", + "# Calculations:\n", + "w12=wl*nl*hl#wattage of 12 lamps in Wh\n", + "w6=wf*nf*hf#wattage of 12 fans in Wh\n", + "w2=wc*nc*hc#wattage of 2 electric cookers in Wh\n", + "w21=wg*hg*ng#total wattage of gysers in Wh\n", + "tcg=(w12+w6)*10**-3#TOTAL WATTAGE OF LAMPS AND FANS\n", + "Ecg= (tcg*Ccg*30)/100#TOTAL ENERGY CHARGES @40 PAISA PER UNIT\n", + "tcg1=(w2+w21)*10**-3#TOTAL WATTAGE OF COOKERS AND GYSERS\n", + "Ecg1= (tcg1*Ccg1*30)/100#TOTAL ENERGY CHARGES @35 PAISA PER UNIT\n", + "tc=Ecg+Ecg1# IN RUPPES\n", + "\n", + "#Results\n", + "print \"total cost of electric charge @40 paisa per unit in rupees\",Ecg\n", + "print \"total cost of electric charge @35 paisa per unit in rupees\",Ecg1\n", + "print \"total charge for ligh and power in rupees\",tc" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "total cost of electric charge @40 paisa per unit in rupees 108.0\n", + "total cost of electric charge @35 paisa per unit in rupees 189.0\n", + "total charge for ligh and power in rupees 297.0\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.7: Page 63" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from __future__ import division\n", + "import math\n", + "\n", + "#given and Calculations\n", + "V = 250;#volts\n", + "r = 0.03; #in ohms\n", + "I = 20; #in Amps\n", + "nl=400#no. of lamps\n", + "wl=100#wattage of lamps\n", + "nf=100#no. of fans\n", + "wf=40#wattage of fans\n", + "nc=200#no. of wall scokets\n", + "wc=60#wattage of wall scckets\n", + "hl=50#heating load in kW\n", + "h=5 # hours\n", + "\n", + "# Calculations:\n", + "w400=wl*nl#wattage of 400 lamps in W\n", + "w6=wf*nf#wattage of 100 fans in W\n", + "w2=wc*nc#wattage of 200 wall sockets in Wh\n", + "tc= (w400+w6+w2)/1000#total consumption in kW\n", + "Ml=V*I/1000#miscellaneous loads in kW\n", + "Mo= ((50*80*746)/(100*1000))#MOTOR AT 80% LOAD IN Kw\n", + "tl=tc+Ml+hl+Mo#total load in kW\n", + "It = tl*1000/V\n", + "Vc=It*r#voltage drop in the cable\n", + "Vs=Vc+V#voltage at the sending end of the feeder in volts\n", + "Pw=It**2*r#power wasted in kW\n", + "ll=tc*h#lightning load in kWh\n", + "te=Ml*2 + ll#TOTAL ENERGY COSNUMED PER DAY\n", + "Nu=te*6#NO. OF UNITS\n", + "Ec=(Nu*30)/100# ENERGY CHARGE @30 PAISA PER UNIT\n", + "eCM=Ec+2+34.80#TOTAL CHARGE AFTER TAX AND RENT IN RUPEES.\n", + "hlh=hl*4#heating load in kWh\n", + "Moh=Mo*8#MOTOR LOAD IN kWh\n", + "TEP=hlh+Moh#total energy per day\n", + "tepl=TEP*6#total energy in 6 days\n", + "tepc=(tepl*35)/100# energy charges @35 paisa per unit in rupees\n", + "tepcl=tepc+50+78.96#total charges in rupess\n", + "\n", + "GTb = eCM + tepcl\n", + "\n", + "\n", + "#Results\n", + "print \"(a)total consumption of factory is \", tl,\"kW\"\n", + "print \"(b)total current taken buy the factory\",It,\" Amp\"\n", + "print \"(c)voltage at the sending end of the feeder is\",round(Vs,1),\"Volts\"\n", + "print \"(d)power wasted is\",round(Pw/1000,2),\"kW\"\n", + "print \"(e)total lightning charges- including meter rent and electricy tax is,(Rs)=\",round(eCM,2)\n", + "print \"total power charges including meter rent and electricy tax is,(Rs)=\",round(tepcl,2)\n", + "print \"grand total of bills is,(Rs)=\",round(GTb,2)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a)total consumption of factory is 140.84 kW\n", + "(b)total current taken buy the factory 563.36 Amp\n", + "(c)voltage at the sending end of the feeder is 266.9 Volts\n", + "(d)power wasted is 9.52 kW\n", + "(e)total lightning charges- including meter rent and electricy tax is,(Rs)= 558.8\n", + "total power charges including meter rent and electricy tax is,(Rs)= 1050.27\n", + "grand total of bills is,(Rs)= 1609.07\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.8: Page 64" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data :\n", + "V=250;# voltage in volts\n", + "L=5*746;# 1 hp=746 watt\n", + "eta=80# eficiency of motor in %\n", + "\n", + "# Calculations:\n", + "Input=(L*100)/80; \n", + "I=Input/V;\n", + "\n", + "#Results\n", + "print \"cureent,I(A) = \", I" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "cureent,I(A) = 18.65\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.9: Page 64" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given:\n", + "p=30 #horse power of motor\n", + "r=24 # rupees per kWh\n", + "ec=35#paisa per unit\n", + "n=80 #percentage of load\n", + "t=8 # in hours\n", + "d=25 # total days\n", + "ne=96#efficiency of motor in percentage\n", + "\n", + "#calculations:\n", + "mo=(n*p)/100#output of motor at 80% of load\n", + "mi=(mo*100*746)/(ne)#input of motor in watts\n", + "ecm=mi*10**-3*t*d#energy consumed in a month\n", + "ecu=(ecm*35)/100#energy charges\n", + "mid=(30*100*746)/(ne*1000)#input of motor in kW at demanded\n", + "ecud=(mid*24)# demanded connection in rupees\n", + "ta=ecu+ecud#total bill in rupees\n", + "\n", + "#Results\n", + "print \"total bill in rupees is\",ta" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "total bill in rupees is 1865.0\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.10: Page 65" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given:\n", + "V=400#three phase voltage\n", + "lp=50#no. of light points\n", + "lw=60#wattage of light points\n", + "fp=20#no. of fan points\n", + "fw=100#wattage of fan points\n", + "wpp=10#no. of wall plug points\n", + "wppw=60#wattage of wall plug points\n", + "bp=5 #no. of bell points\n", + "bpw=40#wattage of bell points\n", + "ppp=8#power plug points\n", + "pppw=500#wattage of power plug points\n", + "\n", + "#calculations:\n", + "lpw=lp*lw#wattage of 50 lamps\n", + "fpw=fp*fw#wattage of 20 fans\n", + "wpppw=wpp*wppw#wattage of wall plug points\n", + "bpww=bp*bpw#wattage of bell points \n", + "tl=lpw+fpw+wpppw+bpww#total wattage\n", + "ppppw=ppp*pppw#wattage of power plug points\n", + "tw=tl+ppppw#total wattage\n", + "Il=(tl/V)# CURRENT THROUGH LIGHTNING LOAD\n", + "Ip=ppppw/V# current through power load\n", + "ttl=Il+Ip#total load curent\n", + "\n", + "#Results\n", + "print \"total wattage of lightning load is in watts = \", tl\n", + "print \"total load current in amperes = \",ttl" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "total wattage of lightning load is in watts = 5800\n", + "total load current in amperes = 24.5\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.11: Page 66" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data and calculations:\n", + "h=30;# in m\n", + "Fl=10# friction loss in %\n", + "eta=90;# eficiency of pump\n", + "w=1000;# water weight in kg\n", + "flow_rate=243;# in per hour\n", + "\n", + "# Calculations:\n", + "Hl=(Fl/100)*h;\n", + "total_H=h+Hl;\n", + "W_done=(flow_rate*w*total_H)/60;# in kg-m/min\n", + "output=W_done/4500;#output of pump in hp\n", + "In=(output*100)/eta;\n", + "O=In;\n", + "\n", + "#Results\n", + "print \"output of the motor,O(hp) = \",O" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "output of the motor,O(hp) = 33.0\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 4.12: Page 66" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from __future__ import division\n", + "import math\n", + "\n", + "#given data:\n", + "l=7.5#load in tonnes\n", + "h=135#height in meters\n", + "c=0.5#cge weight in tonnes\n", + "b=3 #balance weight in tonnes\n", + "td=90#time in seconds\n", + "onet=1000# in kg\n", + "onehp=746#watt\n", + "\n", + "#calculations:\n", + "wl=l+c-b#weight lifted during upward journey in tonnes\n", + "wld=b-c#weight lifted during downward journey in tonnes\n", + "wdu=(wl*10**3*h*60)/td#work done by the lift per minute during upward journey\n", + "wdd=(wld*10**3*h*60)/td#work done by the lift per minute during downward journey\n", + "mou=wdu/4500# in hp\n", + "miu=(mou*100*746)/(n*1000)# input of motor in kW\n", + "mod=wdd/4500# in hp\n", + "mid=(mod*100*746)/(n*1000)# input of motor in kW\n", + "tc=miu+mid#total energy consumption in kW\n", + "Eh=tc*10#total energy consuption per hour\n", + "rate=40#rate in paisa\n", + "ce=Eh*(rate/100)#cost of energy in rupees\n", + "\n", + "#Results\n", + "print \"(a1)BHP of the motor in upward journey in hp\",mou \n", + "print \"(a2)BHP of the motor in downward journey in hp\",mod\n", + "print \"(b)cost of energy in rupees is\" ,ce" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(a1)BHP of the motor in upward journey in hp 100.0\n", + "(a2)BHP of the motor in downward journey in hp 50.0\n", + "(b)cost of energy in rupees is 559.5\n" + ] + } + ], + "prompt_number": 12 + } + ], + "metadata": {} + } + ] +} \ No newline at end of file -- cgit