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

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25 cm / 3 m 24.33 26.62 22.68 22.93Table 63. Comparison of Dimensionless Temperature Distribution for Model and Hypothetical Building:Two Window Cases-Lower WindowExperimental ModelTemperaturesPredicted Building Temperatures(Tambient=20 C)Ground FloorColumn2 Windows3 Stacks2 Windows2 Stacks2 Windows3 Stacks2 Windows2 Stacks26 cm / 3 m 31.70 34.59 23.49 23.8119 cm / 2.3 m 29.90 32.70 23.29 23.6012 cm / 1.4 m 26.78 29.80 22.95 23.285 cm / 0.6 m 21.94 23.34 22.41 22.57Ground FloorHeated Zone2 Windows3 Stacks2 Windows2 Stacks2 Windows3 Stacks27 cm / 3.2 m 34.59 36.45 23.80 24.0121 cm / 2.5 m 32.30 33.42 23.55 23.6815 cm / 1.8 m 30.98 32.81 23.41 23.619.5 cm / 1.1 m 27.18 30.54 22.99 23.363 cm / 0.4 m 43.20 44.19 24.75 24.862 Windows2 StacksAtrium2 Windows3 Stacks2 Windows2 Stacks2 Windows3 Stacks100 cm / 12 m 28.16 30.77 23.10 23.3875 cm / 9 m 27.95 30.62 23.07 23.3750 cm / 6 m 28.19 30.29 23.10 23.3325 cm / 3 m 26.78 29.80 22.95 23.282 Windows2 Stacks200
Single Heated Zone Model vs Building: Upper Windows OpenTable 64. Comparison of Dimensionless Temperature Distribution for Model and Hypothetical Building:Seven Window Cases-Upper WindowExperimental ModelTemperaturesPredicted Building Temperatures(Tambient=20 C)Ground FloorColumn7 windows3 stacks7 Windows2 Stacks7 windows3 stacks7 Windows2 Stacks26 cm / 3 m 27.57 31.95 23.03 23.5119 cm / 2.3 m 26.05 28.97 22.87 23.1912 cm / 1.4 m 21.87 26.04 22.41 22.865 cm / 0.6 m 17.93 23.66 21.97 22.60Ground FloorHeated Zone7 windows3 stacks7 Windows2 Stacks7 windows3 stacks27 cm / 3.2 m 29.70 37.62 23.27 24.1421 cm / 2.5 m 26.19 33.70 22.88 23.7115 cm / 1.8 m 24.79 31.13 22.73 23.429.5 cm / 1.1 m 22.69 30.01 22.50 23.303 cm / 0.4 m 43.03 28.64 24.73 23.157 Windows2 StacksAtrium7 windows3 stacks7 Windows2 Stacks7 windows3 stacks100 cm / 12 m 23.27 27.15 22.56 22.9975 cm / 9 m 24.16 27.54 22.66 23.0350 cm / 6 m 22.86 27.63 22.51 23.0425 cm / 3 m 22.03 25.31 22.42 22.787 Windows2 StacksTable 65. Comparison of Dimensionless Temperature Distribution for Model and Hypothetical Building:Five Window Cases-Upper WindowExperimental ModelTemperaturesPredicted Building Temperatures(Tambient=20 C)Ground FloorColumn5 Windows3 Stacks5 Windows2 Stacks5 Windows3 Stacks5 Windows2 Stacks26 cm / 3 m 27.69 32.18 23.05 23.5419 cm / 2.3 m 27.00 29.66 22.97 23.2612 cm / 1.4 m 24.30 26.18 22.67 22.885 cm / 0.6 m 19.65 23.00 22.16 22.53Ground FloorHeated Zone5 Windows3 Stacks5 Windows2 Stacks5 Windows3 Stacks27 cm / 3.2 m 29.82 36.91 23.28 24.0621 cm / 2.5 m 27.97 32.59 23.08 23.5815 cm / 1.8 m 26.89 31.07 22.96 23.429.5 cm / 1.1 m 24.32 30.01 22.68 23.303 cm / 0.4 m 43.77 29.19 24.81 23.215 Windows2 StacksAtrium5 Windows3 Stacks5 Windows2 Stacks5 Windows3 Stacks100 cm / 12 m 24.09 27.01 22.65 22.9775 cm / 9 m 25.35 27.37 22.79 23.0150 cm / 6 m 24.84 27.35 22.73 23.015 Windows2 Stacks201
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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
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
Page 194 and 195: 194
Page 196 and 197: Five Windows Open: Upper versus Low
Page 198 and 199: One Window Open: Upper versus Lower
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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