Methodology for the Evaluation of Natural Ventilation in ... - Cham
Methodology for the Evaluation of Natural Ventilation in ... - Cham
Methodology for the Evaluation of Natural Ventilation in ... - Cham
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3.6.1 Indoor Environment .............................................................................................. 553.7 Discussion ..................................................................................................................... 663.8 Challenges with Monitor<strong>in</strong>g a <strong>Natural</strong>ly Ventilated Build<strong>in</strong>g ...................................... 693.9 Summary ....................................................................................................................... 70Chapter 4.0 Model<strong>in</strong>g and Visualization Techniques ....................................................... 714.1 Overview <strong>of</strong> Model<strong>in</strong>g as a Method ............................................................................. 714.1.1 Full-Scale Model<strong>in</strong>g.............................................................................................. 724.1.2 Reduced-Scale Model<strong>in</strong>g ...................................................................................... 734.1.3 Experiment Fluids ................................................................................................. 744.1.4 Buoyancy-Driven <strong>Natural</strong> <strong>Ventilation</strong> Model<strong>in</strong>g ................................................. 744.1.5 W<strong>in</strong>d-Driven <strong>Natural</strong> <strong>Ventilation</strong> Model<strong>in</strong>g ......................................................... 754.1.6 Comb<strong>in</strong>ed Buoyancy-W<strong>in</strong>d Model<strong>in</strong>g .................................................................. 764.2 Flow Visualization ........................................................................................................ 764.2.1 Pr<strong>in</strong>ciples <strong>of</strong> Flow Visualization ........................................................................... 774.2.2 Application to Build<strong>in</strong>gs ....................................................................................... 784.2.3 Methods Used ....................................................................................................... 794.3 Summary ....................................................................................................................... 81Chapter 5.0 Dimensional Analysis and Similitude ............................................................ 835.1 Govern<strong>in</strong>g Equations .................................................................................................... 835.1.1 Dimensionless Equations and Result<strong>in</strong>g Parameters ............................................ 845.2 Parameters <strong>for</strong> Buoyancy-Driven <strong>Ventilation</strong> .............................................................. 855.3 Similarity Requirements ............................................................................................... 865.3.1 Geometric Similarity ............................................................................................. 865.3.2 K<strong>in</strong>ematic Similarity ............................................................................................. 875.3.3 Thermal Similarity ................................................................................................ 885.4 O<strong>the</strong>r Issues <strong>for</strong> Similarity ............................................................................................ 885.5 Characteristic Values .................................................................................................... 895.6 Application <strong>of</strong> Dimensional Analysis and Similitude .................................................. 895.7 Summary ....................................................................................................................... 91Chapter 6.0 Reduced-Scale Model <strong>Methodology</strong> and Experiments ................................ 936.1 Introduction ................................................................................................................... 936.2 Model Development...................................................................................................... 936.3 Model Descriptions ....................................................................................................... 946.3.1 Physical Model...................................................................................................... 946.3.2 CFD Model ......................................................................................................... 1006.4 Experimental Equipment and Measurements ............................................................. 1026.4.1 Equipment ........................................................................................................... 1026.4.2 Measurements ..................................................................................................... 1056.5 Experiments ................................................................................................................ 1066.5.1 Buoyancy ............................................................................................................ 1066.5.2 W<strong>in</strong>d-Assisted ..................................................................................................... 1126.6 Summary ..................................................................................................................... 115Chapter 7.0 Experimental Results .................................................................................... 1177.1 Buoyancy-Driven <strong>Ventilation</strong> Results ........................................................................ 1197.1.1 S<strong>in</strong>gle Heated Zone Case .................................................................................... 1197.1.2 Two Heated Zone Case ....................................................................................... 1265