Added(A)/Deleted(D) following books

 A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter1.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter10.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter11.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter12.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter13.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter14.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter15.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter16.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter17.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter18.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter19.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter2.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter4.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter5.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter7.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter8.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter9.ipynb
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/screenshots/chap11.png
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/screenshots/chap14.png
A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/screenshots/chap7.png
A  Principles_Of_Electric_Machines_And_Power_Electronics_by_P._C._Sen/README.txt
A  sample_notebooks/PrashantSahu/Chapter-2-Molecular_Diffusion_-_Principles_of_Mass_Transfer_and_Separation_Process_by_Binay_K_Dutta_1.ipynb
A  "sample_notebooks/S PRASHANTHS PRASHANTH/Chapter_1_5.ipynb"

1 files changed, 205 insertions, 0 deletions

diff --git a/Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter18.ipynb b/Basic_Engineering_Thermodynamics_by_Rayner_Joel/Chapter18.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 18 - Refrigeration"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 1: pg 612"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Example 18.1\n",
+      " (a) The coefficient of performance of the refrigerator is  =   4.49\n",
+      " (b) The mass flow of refrigerant/h is (kg) =  166.94\n",
+      " (c) The mass flow of water required is (kg/h) =  579.74\n",
+      "The answer is a bit different due to rounding off error in textbook\n"
+     ]
+    }
+   ],
+   "source": [
+    "#pg 612\n",
+    "print('Example 18.1');\n",
+    "\n",
+    "# aim : To determine\n",
+    "# (a) the coefficient of performance\n",
+    "# (b) the mass flow of the refrigerant\n",
+    "# (c) the cooling water required by the condenser\n",
+    "import math\n",
+    "from math import log\n",
+    "# given values\n",
+    "P1 = 462.47;# pressure limit, [kN/m**2]\n",
+    "P3 = 1785.90;# pressure limit, [kN/m**2]\n",
+    "T2 = 273.+59;# entering saturation temperature, [K]\n",
+    "T5 = 273.+32;# exit temperature of condenser, [K]\n",
+    "d = 75*10**-3;# bore, [m]\n",
+    "L = d;# stroke, [m]\n",
+    "N = 8;# engine speed, [rev/s]\n",
+    "VE = .8;# olumetric efficiency\n",
+    "cpL = 1.32;# heat capacity of liquid, [kJ/kg K]\n",
+    "c = 4.187;# heat capacity of water, [kj/kg K]\n",
+    "\n",
+    "# solution\n",
+    "# from given table\n",
+    "# at P1\n",
+    "h1 = 231.4;# specific enthalpy, [kJ/kg]\n",
+    "s1 = .8614;# specific entropy,[ kJ/kg K\n",
+    "v1 = .04573;# specific volume, [m**3/kg]\n",
+    "\n",
+    "# at P3\n",
+    "h3 = 246.4;# specific enthalpy, [kJ/kg]\n",
+    "s3 = .8093;# specific entropy,[ kJ/kg K\n",
+    "v3 = .04573;# specific volume, [m**3/kg]\n",
+    "T3= 273+40;# saturation temperature, [K]\n",
+    "h4 = 99.27;# specific enthalpy, [kJ/kg]\n",
+    "# (a)\n",
+    "s2 = s1;# specific entropy, [kJ/kg k]\n",
+    "# using s2=s3+cpv*log(T2/T3)\n",
+    "cpv = (s2-s3)/log(T2/T3);# heat capacity, [kj/kg k]\n",
+    "\n",
+    "# from Fig.18.8\n",
+    "T4 = T3;\n",
+    "h2 = h3+cpv*(T2-T3);# specific enthalpy, [kJ/kg]\n",
+    "h5 = h4-cpL*(T4-T5);# specific enthalpy, [kJ/kg]\n",
+    "h6 = h5;\n",
+    "COP = (h1-h6)/(h2-h1);# coefficient of performance\n",
+    "print ' (a) The coefficient of performance of the refrigerator is  =  ',round(COP,2)\n",
+    "\n",
+    "# (b)\n",
+    "SV = math.pi/4*d**2*L;# swept volume of compressor/rev, [m**3]\n",
+    "ESV = SV*VE*N*3600;# effective swept volume/h, [m**3]\n",
+    "m = ESV/v1;# mass flow of refrigerant/h,[kg]\n",
+    "print ' (b) The mass flow of refrigerant/h is (kg) = ',round(m,2)\n",
+    "\n",
+    "# (c)\n",
+    "dT = 12;# temperature limit, [C]\n",
+    "Q = m*(h2-h5);# heat transfer in condenser/h, [kJ]\n",
+    "# using Q=m_dot*c*dT, so\n",
+    "m_dot = Q/(c*dT);# mass flow of water required, [kg/h]\n",
+    "print ' (c) The mass flow of water required is (kg/h) = ',round(m_dot,2)\n",
+    "\n",
+    "print 'The answer is a bit different due to rounding off error in textbook'\n",
+    "#  End\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2: pg 614"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Example 18.2\n",
+      " (a) The mass flow of R401 is (kg/h) =  592.6\n",
+      " (b) The dryness fraction of R401 at the entry to the evaporator is  =  0.244\n",
+      " (c) The power to driving motor is (kW) =  5.86\n",
+      " (d) The ratio of heat transferred from condenser to the power required to the motor is  =   4.74 :1\n"
+     ]
+    }
+   ],
+   "source": [
+    "#pg 614\n",
+    "print('Example 18.2');\n",
+    "\n",
+    "# aim : To determine\n",
+    "# (a) the mass flow of R401\n",
+    "# (b) the dryness fraction of  R401 at the entry to the evaporator\n",
+    "# (c) the power of driving motor\n",
+    "# (d) the ratio of heat transferred from condenser to the power required to the motor\n",
+    "from math import log\n",
+    "# given values\n",
+    "P1 = 411.2;# pressure limit, [kN/m^2]\n",
+    "P3 = 1118.9;# pressure limit, [kN/m^2]\n",
+    "Q = 100*10**3;# heat transfer from the condenser,[kJ/h]\n",
+    "T2 = 273+60;# entering saturation temperature, [K]\n",
+    "\n",
+    "# given\n",
+    "# from given table\n",
+    "# at P1\n",
+    "h1 = 409.3;# specific enthalpy, [kJ/kg]\n",
+    "s1 = 1.7431;# specific entropy,[ kJ/kg K\n",
+    "\n",
+    "# at P3\n",
+    "h3 = 426.4;# specific enthalpy, [kJ/kg]\n",
+    "s3 = 1.7192;# specific entropy,[ kJ/kg K\n",
+    "T3 = 273.+50;# saturation temperature, [K]\n",
+    "h4 = 265.5;# specific enthalpy, [kJ/kg]\n",
+    "# (a)\n",
+    "s2 = s1;# specific entropy, [kJ/kg k]\n",
+    "# using s2=s3+cpv*log(T2/T3)\n",
+    "cpv = (s2-s3)/log(T2/T3);# heat capacity, [kj/kg k]\n",
+    "\n",
+    "# from Fig.18.8\n",
+    "h2 = h3+cpv*(T2-T3);# specific enthalpy, [kJ/kg]\n",
+    "Qc = h2-h4;# heat transfer from condenser, [kJ/kg]\n",
+    "mR401 = Q/Qc;# mass flow of R401, [kg]\n",
+    "print ' (a) The mass flow of R401 is (kg/h) = ',round(mR401,1)\n",
+    "\n",
+    "# (b)\n",
+    "hf1 = 219;# specific enthalpy, [kJ/kg]\n",
+    "h5 = h4;\n",
+    "# using h5=hf1+s5*(h1-hf1),so\n",
+    "x5 = (h5-hf1)/(h1-hf1);# dryness fraction\n",
+    "print ' (b) The dryness fraction of R401 at the entry to the evaporator is  = ',round(x5,3)\n",
+    "\n",
+    "# (c)\n",
+    "P = mR401*(h2-h1)/3600/.7;# power to driving motor, [kW]\n",
+    "print ' (c) The power to driving motor is (kW) = ',round(P,2)\n",
+    "\n",
+    "# (d)\n",
+    "r = Q/3600./P;# ratio\n",
+    "print ' (d) The ratio of heat transferred from condenser to the power required to the motor is  =  ',round(r,2),\":1\"\n",
+    "\n",
+    "#  End\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}