{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Chapter 29:Commissioning and Maintenance" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 29.1,PAGE NUMBER:347" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "\n", "LMTD at 85 percentage air flow=14.8 K(error)\n" ] } ], "source": [ "import math\n", "# Variable declaration\n", "T_e=3;# The evaporating temperature in °C\n", "T_in=20;# The temperature of air entering coil in °C\n", "T_out=11;# The temperature of air off coil at full air flow in °C\n", "T_c=35;# The condensing temperature in °C\n", "af=(1-0.15);# The reduced air flow \n", "\n", "# Calculation\n", "LMTD=((T_in-T_e)-(T_out-T_e))/math.log((T_in-T_e)/(T_out-T_e));# K\n", "T_aoff=T_in-(T_in-T_out)/af;# Air off coil at 85% air flow (°C)\n", "Cp=(af)**0.8;# Coil performance at 85% air flow (°C)\n", "LMTD_85=LMTD/Cp;# LMTD at 85% air flow in K\n", "print\"\\nLMTD at 85 percentage air flow=%2.1f K(error)\"%LMTD_85" ] } ], "metadata": { "celltoolbar": "Raw Cell Format", "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 }