From 92cca121f959c6616e3da431c1e2d23c4fa5e886 Mon Sep 17 00:00:00 2001 From: hardythe1 Date: Tue, 7 Apr 2015 15:58:05 +0530 Subject: added books --- .../Chapter6.ipynb | 315 +++++++++++++++++++++ 1 file changed, 315 insertions(+) create mode 100755 Thermodynamics_An_Engineering_Approach/Chapter6.ipynb (limited to 'Thermodynamics_An_Engineering_Approach/Chapter6.ipynb') diff --git a/Thermodynamics_An_Engineering_Approach/Chapter6.ipynb b/Thermodynamics_An_Engineering_Approach/Chapter6.ipynb new file mode 100755 index 00000000..0cebc0e1 --- /dev/null +++ b/Thermodynamics_An_Engineering_Approach/Chapter6.ipynb @@ -0,0 +1,315 @@ +{ + "metadata": { + "name": "" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 6: The Second Law of Thermodynamics" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-1 ,Page No.286" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "QH=80.0;#rate of heat transfer in MW\n", + "QL=50.0;#rate of waste heat rejection in MW\n", + "\n", + "#calculations\n", + "Wnet=QH-QL;\n", + "print'net power output %i MW'%Wnet\n", + "nth=Wnet/QH;\n", + "print'the thermal efficiency is %f '%round(nth,3)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "net power output 30 MW\n", + "the thermal efficiency is 0.375000 \n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-2 ,Page No.286" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "Wnet=65;#power output in hp\n", + "nth=0.24;#effficiency of car\n", + "HV=19000;#heating value in Btu/lbm\n", + "\n", + "#calculations\n", + "QH=Wnet/nth*2545;#factor of 2545 to convert to Btu/h\n", + "m=QH/HV;\n", + "print'the engine must burn at fuel rate %f lbm/h'%round(m,1)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "the engine must burn at fuel rate 36.300000 lbm/h\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-3 ,Page No.291" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "Wnet=2.0;#power input in kW\n", + "QL=360.0;#rate of heat rejection in kJ/min\n", + "\n", + "#calculations\n", + "COPR=QL/Wnet/60;#factor of 60 to convert kW to kJ/min\n", + "print'coefficient of performance of refrigerator is %i'%COPR;\n", + "QH=QL+Wnet*60;#factor of 60 to convert kW to kJ/min\n", + "print'heat rejection rate %i kJ/min'%QH\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "coefficient of performance of refrigerator is 3\n", + "heat rejection rate 480 kJ/min\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-4 ,Page No.291" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "COP=2.5;#COP in the given conditions of heat pump\n", + "QH=80000.0;#heat loss rate in kJ/hr\n", + "\n", + "#calculations\n", + "Wnet=QH/COP;\n", + "print'the power consumed %i kJ/h'%Wnet\n", + "QL=QH-Wnet;\n", + "print'the rate at which heat is absorbed %i kJ/h'%QL\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "the power consumed 32000 kJ/h\n", + "the rate at which heat is absorbed 48000 kJ/h\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-5 ,Page No.306" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "QH=500.0;#heat recieved per cycle in kJ\n", + "TL=30+273.0;#low temperature source in C\n", + "TH=652+273.0;#high temperature source in C\n", + "\n", + "#calculations\n", + "nth=1-TL/TH;\n", + "print'the thermal efficiency of carnot engine is %f'%round(nth,3);\n", + "QL=TL*QH/TH;\n", + "print'the amount of heat rejected to the sink per cycle %i kJ'%round(QL)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "the thermal efficiency of carnot engine is 0.672000\n", + "the amount of heat rejected to the sink per cycle 164 kJ\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-6 ,Page No.310" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "COP=13.5;#COP of refrigerator\n", + "TH=75+460.0;#room temperature in R\n", + "TL=35+460.0;#refrigerated temp in R\n", + "\n", + "#calculations\n", + "COPR=1/(TH/TL-1);\n", + "if COPR>=COP:\n", + " print('claim is true');\n", + "else:\n", + " print('claim is false')\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "claim is false\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-7 ,Page No.310" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "TL=-5+273.0;#in C\n", + "TH=21+273.0;#house temp in C\n", + "QH=135000.0/3600;#heat loss rate in kW\n", + "\n", + "#calculations\n", + "COPHP=1/(1-TL/TH);\n", + "Wnet=QH/COPHP;\n", + "print'minimum power required %f kW'%round(Wnet,2)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "minimum power required 3.320000 kW\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6-8 ,Page No.314" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#given data\n", + "Qrefrig=40.0;#heat load on referigerator in W\n", + "COPR=1.3;#COP of referigerator\n", + "Wlight=40.0;#rated power of bulb in W\n", + "\n", + "#calculation\n", + "Wrefrig=Qrefrig/COPR;\n", + "Wt=Wrefrig+Wlight;\n", + "AnHr=365*24;#annual hours\n", + "NOH=20*30/3600.0*365;#normal operating hours\n", + "AOP=AnHr-NOH;#addtional operating hours\n", + "APC=Wt*AOP/1000;#additional power consumption; fator of 1000 to convert to kW\n", + "print'increase in power consumption %i kWh/yr'%round(APC);\n", + "print'increase in cost S%f/yr'%round((APC)*0.08,1)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "increase in power consumption 616 kWh/yr\n", + "increase in cost S49.300000/yr\n" + ] + } + ], + "prompt_number": 3 + } + ], + "metadata": {} + } + ] +} \ No newline at end of file -- cgit