TABLE OF CONTENTS - The Professional Green Building Council

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Theme C: Education and Market TransformationAccording to the these values it is possible to verify that, when the courtyard 01becomes the windward direction, what happens mostly for South winds, the airvelocity is already satisfactory, ranging from 1.0 to 1.5m/s on average at pedestrianlevel, but decreasing since the height increases. The same results can be visualizedin the bottom right of the Fig. 15 previously mentioned.In this case, the introduction of the underground system would raise the airvelocity in around 0.5m.On the other hand, the simulation for North winds (from the left side of bothimages showed on Fig. 16), indicates a concentrated still air area on the courtyard01, now on the leeward area (the bottom right side). In this case, the undergroundconnection seems to be efficient improving air velocity on the leeward, whatduring summer season will benefit pedestrians comfort levels in this area.Figure 16: Building cross-sections for North wind. Results ranging from 0.0 –5.0m/s.Now, the results displayed on the chart 02 demonstrates that, for the case 01, theair stands still to less than 0.5m/s along with the distance taken from the wall, evenfor different heights. With the addition of the underground system, the air velocityincreases considerably, mostly for distances beyond 1m from the building wall,maintaining it in a range from 1.0 to more than 2.0m/s at pedestrian height.630
Theme C: Education and Market Transformation3.0Air velocity range with height for North wind2.52.01.51.00.50.0(m/s)0.2 0.3 0.5 1.0 2.0 3.0 4.0distance from the building (m)case A 0.5m case A 1.0m case A 2.0mcase B 0.5m case B 1.0m case B 2.0mChart 02: Air Speed Variation in the Courtyard 01 for North wind (leeward).Wind energy production.Due to the channelled wind effect, the air velocity inside the tube reaches up to 7.0on the case 01 and 4.0m/s on the case 02. According to several authors, it ispossible to quantify the kinetic energy generated by air flow through blades of awindmill, determining the potential of this system to generate electricity power,according to the following formula [4]:E=0.60*[(p*D 2 *r*V 3 )/8]Where:E is the Kinetic energy, in Watts;0.60 is the effective efficiency of this system;D is the diameter of the turbine (1.0m);V is the air velocity (5.5m/s as average)Based on this, the potential kinetic energy generated by the proposed system is45W. Some wind turbine manufacturers suggest values from 28 to 120W forequipments with the same characteristics [6 and 7]. This means that the naturalventilation system considered in this project (containing 15 windmills) could631
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Funding OrganisationCOMMERCE AND EC
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Ms. S.Y. Shum, Anna, Lecturer, Divi
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以绿色思维创新绿色
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ENHANCING SUSTAINABILITY DELIVERABL
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Theme A: Connecting the Pearl River
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精宜之道 ”。所谓 “
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to use suitable technology. Additio
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Theme B: Creating a livable, health
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Average Credit4.03.83.63.43.2Averag
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Page 592 and 593: Theme B: Creating a livable, health
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