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

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Stacks Closed Temperature StratificationTable 70. Scaled Temperatures for Stacks Closed Model Experiment and Hypothetical FullScale BuildingModel Temperature Building TemperatureFirst Floor Column 3 Stacks Closed 3 Stacks Closed26 cm / 3 m 59.9 26.619 cm / 2.3 m 53.7 25.912 cm / 1.4 m 47.7 25.35 cm / 0.6 m 41.9 24.6First Floor Heated Zone 3 Stacks Closed 3 Stacks Closed27 cm / 3.2 m 68.4 27.521 cm / 2.5 m 66.0 27.315 cm / 1.8 m 62.0 26.89.5 cm / 1.1 m 58.0 26.43 cm / 0.4 m 50.8 25.6Ground Floor Column 3 Stacks Closed 3 Stacks Closed26 cm / 3 m 40.7 24.519 cm / 2.3 m 36.0 24.012 cm / 1.4 m 33.5 23.75 cm / 0.6 m 27.2 23.0Ground Floor Heated Zone 3 Stacks Closed 3 Stacks Closed27 cm / 3.2 m 36.3 24.021 cm / 2.5 m 33.6 23.715 cm / 1.8 m 34.2 23.89.5 cm / 1.1 m 43.5 24.83 cm / 0.4 m 43.1 24.7Atrium 3 Stacks Closed 3 Stacks Closed100 cm / 12 m 55.5 26.175 cm / 9 m 54.2 26.050 cm / 6 m 51.7 25.725 cm / 3 m 36.1 24.0206
Full-Model Experimental Temperature DataBuoyancy-Driven FlowTable 71. Scaled Temperatures for Buoyancy-Driven FlowGround ColumnHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.0 22.38 22.43 22.462.3 21.96 22.04 22.081.4 21.75 21.86 21.900.6 21.80 21.84 21.87Ground Heated ZoneHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.2 22.47 22.53 22.572.5 22.04 22.13 22.161.8 22.07 22.17 22.171.1 22.02 22.08 22.110.4 23.82 23.79 23.78First Floor South-ColumnHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.0 23.21 23.43 23.532.3 22.69 22.87 22.951.4 22.37 22.51 22.530.6 22.44 22.54 22.56First Floor South-Heated ZoneHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.2 23.74 23.93 24.022.5 23.38 23.56 23.681.8 23.23 23.44 23.491.1 23.56 23.75 23.810.4 22.65 22.75 22.77First Floor North-ColumnHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.0 23.30 23.46 23.492.3 22.56 22.72 22.781.4 22.46 22.58 22.630.6 22.48 22.63 22.67First Floor North-Heated ZoneHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.2 22.90 23.03 23.042.5 22.63 22.78 22.731.8 23.77 23.94 23.931.1 23.17 23.34 23.350.4 22.74 22.89 22.88Second Floor ColumnHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.0 24.86 25.14 25.20207
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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
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3.532.521.55m/s4m/s3m/s2m/s1m/s1.5m
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3.532.521.55m/s4m/s3m/s2m/s1m/s1.5m
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The average and exhaust internal bu
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Table 43. Calculated Wind and Buoya
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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 196 and 197: Five Windows Open: Upper versus Low
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 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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Methodology for the Evaluation of Natural Ventilation in ... - Cham

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