Methodology for the Evaluation of Natural Ventilation in ... - Cham

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Five Windows Open: Upper versus Lower Window LocationTable 55. Scaled Temperature Distribution Comparison of Lower and Upper Windows for Five Window,Three Stack Model Case5 Windows 3 Stacks TemperatureLocationLower Windows(°C)Upper Windows(°C)Scaled Temperature Texhaust 15.06 14.61Tatrium 14.77 14.44Tatrium-lower 14.42 14.26Tatrium-upper 14.85 14.48Theated-zone 18.08 18.10Tcolumn 15.06 14.61Tcolumn-lower 12.39 11.64Tcolumn-upper 16.73 16.41Model Taverage 15.17 14.82outlet velocity 0.70 0.73Table 56. Scaled Temperature Distribution Comparison of Lower and Upper Windows for Five Window,Two Stack Model Case5 Windows 2 Stacks TemperatureLocationLower Windows(°C)Upper Windows(°C)Scaled Temperature Texhaust 16.60 16.31Tatrium 16.23 15.78Tatrium-lower 15.77 14.97Tatrium-upper 16.31 15.90Theated-zone 19.33 18.93Tcolumn 16.62 16.45Tcolumn-lower 13.85 13.63Tcolumn-upper 18.41 19.07Model Taverage 16.64 16.38outlet velocity 0.8 0.9196
Two Windows Open: Upper versus Lower Window LocationTable 57. Scaled Temperature Distribution Comparison of Lower and Upper Windows for Two Window,Three Stack Model Case2 Windows 3 Stacks TemperatureLocationLower Windows(°C)Upper Windows(°C)Scaled Temperature Texhaust 16.87 16.16Tatrium 16.42 15.76Tatrium-lower 15.87 15.55Tatrium-upper 16.50 15.81Theated-zone 19.94 19.24Tcolumn 16.34 15.79Tcolumn-lower 13.00 12.87Tcolumn-upper 18.78 17.76Model Taverage 16.72 16.12outlet velocity 0.60 0.65Table 58. Scaled Temperature Distribution Comparison of Lower and Upper Windows for Two Window,Two Stack Model Case2 Windows 2 Stacks TemperatureLocationLower Windows(°C)Upper Windows(°C)Scaled Temperature Texhaust 18.46 17.26Tatrium 17.94 16.91Tatrium-lower 17.66 16.60Tatrium-upper 17.99 16.97Theated-zone 21.03 20.43Tcolumn 17.84 17.07Tcolumn-lower 13.83 14.13Tcolumn-upper 20.50 19.13Model Taverage 18.15 17.31outlet velocity 0.7 0.8197
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Thesis Committee:Leon R. Glicksman,
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Table of ContentsTable of Contents
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7.1.3 Full Model Case .............
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Figure 41. Wind Direction Data for
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List of TablesTable 1. Energy End U
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Table 64. Comparison of Dimensionle
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Chapter 1.0IntroductionEnergy consu
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insulated building envelopes with t
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energy usage and efficient design.
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Figure 3. European Patent Office Bu
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selecting boundary conditions) to e
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2.2.1 Buoyancy-Driven VentilationVe
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Figure 7. Neutral Pressure Level fo
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Combined wind-buoyancy flow is more
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design. The depth of natural ventil
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of cooling required by 30 percent o
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considered when determining how the
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environmental conditions are examin
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As natural ventilation is prevalent
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Chapter 3.0Evaluation of Prototype
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Figure 12. Interior Atrium ViewFigu
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Table 8. Prototype Building Window
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Figure 15. HOBO® H8 Series Tempera
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Finally, airflow visualization was
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only is the airflow almost never at
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Table 10. Window Bag Device Measure
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Mon 7-21Tue 7-22Wed 7-23Thu 7-24Fri
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12:00 AM1:00 AM2:00 AM3:00 AM4:00 A
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27-Jul27-Jul28-Jul28-Jul29-Jul30-Ju
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A range of air exchange rates was f
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the windows on the second floor, or
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Total Electric (kWh/m2)Total Gas (k
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movement, Houghton Hall has much le
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Chapter 4.0Modeling and Visualizati
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for future design of similar type b
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lower and upper openings and natura
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the acceptable diffusion rate, or
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applications involving full-scale b
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digital camera with both manually o
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Chapter 5.0Dimensional Analysis and
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u oHgHT2uocu Hpo1Re Ar1Re Pr(5.7)(5
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X HM X HP(5.16)5.3.2 Kinematic Sim
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Radiation was found to have an impa
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height is used for the full-scale b
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6.3 Model Descriptions6.3.1 Physica
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Figure 30. Floor Plan of the Protot
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Figure 31. North Facade of Model wi
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Monitoring data collected from the
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By default, there was no accounting
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40-location card inserted into the
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6.5 ExperimentsTo evaluate the mode
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modified to determine the impact of
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Figure 39. Two Heated Zone ModelWit
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minute interval, the model was assu
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Figure 42. Cross-Section of Wind-Ge
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Table 25. Wind-Assisted Ventilation
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Figure 44. Heaters and Zones for a)
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Height from Floor (m)Height from Fl
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Where V is the outlet velocity, A o
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Table 32. Conduction Heat Loss for
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a) Air Modelb) Water ModelFigure 50
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Height from Floor (m)The temperatur
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Height from Floor (m)In the atrium
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First NorthUpper Window 0.17 m/s -0
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Height from Floor (m)the column at
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Height from Floor (m)Height from Fl
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Height from Floor (m)3.53.02.52.01.
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was less than 12 percent. These val
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Table 39. Variation of Outlet Wind
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temperature of the air was the same
Page 146 and 147: 3.532.521.55m/s4m/s3m/s2m/s1m/s1.5m
Page 148 and 149: 3.532.521.55m/s4m/s3m/s2m/s1m/s1.5m
Page 150 and 151: The average and exhaust internal bu
Page 152 and 153: Table 43. Calculated Wind and Buoya
Page 154 and 155: In the last two lines, for both the
Page 156 and 157: Figure 80. CFD Simulation of the Te
Page 158 and 159: uoyancy case the air from the groun
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Page 162 and 163: windows of naturally ventilated bui
Page 164 and 165: difficult to select the boundary co
Page 166 and 167: simulations are able to do would al
Page 168 and 169: Bordass, W.T., A.K.R. Bromley and A
Page 170 and 171: Linddament, M. 1996. Why CO2? Air I
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Page 174 and 175: MODEL: K20-8SERIAL: 10047RECORDER_I
Page 176 and 177: 2 Boiler-3 50.00 C1 N1 1.0 ON ON OF
Page 178 and 179: |PW|DESCRIP |KW |KWH|KVA|KVH|------
Page 180 and 181: 2:5 ;day_ofYr17:P30 ;EOT = 0.000075
Page 182 and 183: 2:3136:P30 ;DUM2 = -0.040891:-4.089
Page 184 and 185: ;7:21 ;input location;8:0 ;mulptipl
Page 186 and 187: ;79:P22 ;EXC w/DELAY (only for dela
Page 188 and 189: 1:45 ;port5 (homeSense)2:31 ;exit l
Page 190 and 191: 13:P95 ;ENDIF14:P95 ;ENDIF15:P3 ;pu
Page 192 and 193: 2:20 ;RH30:P70 ;sample1:12:20 ;RH31
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Page 198 and 199: One Window Open: Upper versus Lower
Page 200 and 201: 25 cm / 3 m 24.33 26.62 22.68 22.93
Page 202 and 203: 25 cm / 3 m 24.07 25.26 22.65 22.78
Page 204 and 205: Two Stacks Open Temperature Stratif
Page 206 and 207: Stacks Closed Temperature Stratific
Page 208 and 209: 2.3 24.31 24.65 24.781.4 23.35 23.6
Page 210 and 211: 0.6 20.56 20.67 20.94 21.22 21.41 2
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