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

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2.3 24.31 24.65 24.781.4 23.35 23.65 23.780.6 23.38 23.65 23.70Second Floor Heated ZoneHeight from Floor (m) 3 Stacks Open 1 Stack Open Stacks Closed3.2 23.71 24.05 24.192.5 24.14 24.51 24.651.8 25.26 25.62 25.711.1 23.53 23.83 23.920.4 24.66 25.05 25.19208
Combined Wind-Buoyancy Driven FlowTable 72. Scaled Temperature Data for Combined Wind-Buoyancy Driven Flow: Stacks OpenGround Floor-Columnm 5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3 20.39 20.48 20.61 20.86 21.09 21.35 21.64 21.802.3 20.40 20.49 20.63 20.86 21.06 21.33 21.55 21.671.4 20.46 20.54 20.70 20.92 21.12 21.33 21.45 21.540.6 20.51 20.59 20.77 21.02 21.21 21.30 21.33 21.40Ground Floor-Heated Zone5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3.2 20.35 20.43 20.54 20.84 21.10 21.34 21.68 21.912.5 20.39 20.45 20.56 20.81 21.07 21.28 21.63 21.921.8 20.45 20.52 20.63 20.84 21.06 21.28 21.66 22.041.1 20.48 20.56 20.67 20.93 21.78 21.35 22.50 22.780.4 20.94 21.10 21.43 21.87 22.07 22.52 22.71 22.88First Floor-South Columnm 5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3 20.39 20.48 20.70 20.96 21.15 21.43 21.79 22.042.3 20.40 20.49 20.70 20.92 21.15 21.37 21.73 21.931.4 20.46 20.54 20.69 20.89 21.10 21.34 21.71 21.870.6 20.51 20.59 20.72 20.93 21.16 21.40 21.76 21.95First Floor South-Heated Zone5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3.2 20.35 20.43 20.79 21.02 21.32 21.60 22.08 22.752.5 20.39 20.45 20.70 20.94 21.22 21.56 22.08 22.801.8 20.45 20.52 20.71 20.95 21.22 21.56 22.01 22.761.1 20.48 20.56 20.88 21.17 21.44 21.65 22.15 22.700.4 20.94 21.10 20.75 20.92 21.05 21.25 21.76 22.01First Floor-North Columnm 5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3 20.39 20.54 20.70 21.37 21.92 22.56 22.73 22.992.3 20.40 20.51 20.65 20.91 21.12 21.90 22.10 22.441.4 20.46 20.64 20.80 21.10 21.26 21.28 21.53 21.760.6 20.51 20.73 20.92 21.32 21.50 21.67 21.99 22.16First Floor-North Heated Zone5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3.2 20.35 20.84 21.25 21.97 22.17 22.35 22.62 22.672.5 20.39 20.70 20.85 21.20 21.45 21.68 22.00 22.141.8 20.45 21.07 22.20 22.89 23.10 23.24 23.52 23.721.1 20.48 20.70 21.38 22.16 22.34 22.54 22.79 22.940.4 20.94 20.69 20.86 21.43 21.69 21.92 22.28 22.39Second Floor Columnm 5m/s 4m/s 3m/s 2m/s 1.5m/s 1m/s 0.7m/s 0.5m/s3 20.42 20.51 20.91 22.45 22.92 23.25 23.86 24.092.3 20.40 20.48 20.66 21.16 22.61 22.91 23.62 23.751.4 20.42 20.49 20.65 20.86 21.11 21.72 22.26 22.62209
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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
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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 206 and 207: Stacks Closed Temperature Stratific
Page 210 and 211: 0.6 20.56 20.67 20.94 21.22 21.41 2
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