Lecture 3 In Harmony with Nature

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Lecture 3 In Harmony with Nature

  1. 1. <ul><li>I. Scientific and Systematic Management of IAQ </li></ul><ul><li>- for Building Service Professionals </li></ul><ul><li>The Importance of A Standard for IAQ </li></ul><ul><li>Living in Harmony with Nature </li></ul>IAQ Lecture Series Speaker: Kee-Neng Wai, Ph.D Date: Oct 6, 2009 Venue: Aedas Architects
  2. 2. Fallingwater, Bear Run, Pennsylvania (1939) Frank Lloyd Wright Johnson Wax Research Tower in Racine, Wisconsin (1951) The design of the Research Tower consists of fourteen levels, seven of which are square plans with a circular mezzanine above. The central structural and circulation core accommodates the elevator and stairway channels as well as necessary ventilation and services. From the central core, the floor slabs are cantilevered out like branches of a tree. The entire outside surface is sheathed in glass tubes like the adjacent Administration Building to admit light without a view. The single reinforced concrete foundation for the central core is called the &quot;tap root&quot;
  3. 3. Win Tai Food Processing Factory Tai Po Industrial Estate, HK Pest-free exit
  4. 4. Under floor ventilation
  5. 6. Perspiring, headache, restlessness and increase of heart rate Atmospheric CO 2 Level at Sea Front Sick Building Syndrome due to poor ventilation and increase of heart rate Good IAQ Excellent IAQ Yawning Threshold Dozing Threshold Long Term Effects: Building Ordinance Section 123 standard 1900 1960 2000 2010 2020 2030 260 300 360 400 450 500 ↑ 800 1000 1500 2000 2500 and above Hypertension, pains and aches Stomach acid/ulcer ……………………………………… .. ……………………………………… .. ……………………………………… .. Year CO 2 level 5 air-exchange per hour
  6. 7. Common Sick Building Syndrome
  7. 10. Chicago Landmark To Reduce Energy 80% <ul><li>CHICAGO – Sears Tower, that bronze-black monument that forms the 110-story peak of the skyline here and stands as the tallest office building in the Western Hemisphere, has a new name and will soon have another new feature: rooftop wind turbines. </li></ul><ul><li>The building’s owners say the turbines are part of a $350 million retrofit of the 1970s-era modernist building now named Willis Tower. The plan is to reduce electricity use by 80% over five years through upgrades in the glass exterior, internal lighting, heating, cooling and elevator systems. </li></ul><ul><li>With 4.5 million ft 2 (418, 000m 2 ) of office and retail space, 16,000 windows and 104 elevators, the project is bound to be one of the most substantial green renovations ever tried on one site, planners said. Willis Tower is significantly larger than the 102-story, 2.6million ft 2 (242, 000m 2 ) Empire State Building, which is also undergoing renovation to reduce energy consumption. </li></ul><ul><li>“ If we can take care of one building that size, it has a huge impact on society,” said Adrian Smith, an architect whose firm designed the renovation. “It is a village in and of itself.” </li></ul>Source from: ASHRAE JOURNAL August 2009
  8. 11. IAQ Initiative 2.0 IAQ Initiative 1.0
  9. 12. < 25.5°C Temperature Relative Humidity Carbon Dioxide Formaldehyde Air Movement TVOC Radon Airborne Bacteria < 70 % My Recommendation 22.5 ± 2.5°C 55 ± 10% < 1,200 ppm < 80 ppb + caution notes My Recommendation < 0.3 m/s (for comfort) < 250 ppb (Standard) < 500 ppb (Week) < 1000 ppb (Day) < 200 Bq/m 3 (Avoid using radioactive material) Delete < 87 ppb < 261 ppb < 0.3 m/s < 0.2 m/s < 200 Bq/m 3 < 150 Bq/m 3 < 1000 cfu/m 3 < 500 cfu/m 3 < 24 ppb < 800 ppm 40 to 70 % 20 to 25.5°C < 1,000 ppm < 81 ppb HK Government “Indoor Air Quality Guidance Notes” Parameter Excellent Good HK Government “Indoor Air Quality Guidance Notes” Parameter Excellent Good
  10. 13. Outdoor Air Quality Trend of Hong Kong
  11. 14. Q: How to deal with RSP and airborne bacteria problem and be in harmony with nature? <ul><li>Capturing all sub-micron particles </li></ul><ul><li>Capturing all air-borne micro-organisms </li></ul><ul><li>Removal of Odour, e.g. tobacco smoke </li></ul><ul><li>Compact & light weight design </li></ul><ul><li>Energy saving & money saving </li></ul>A: Electronic Air Cleaner
  12. 15. <ul><li>IAQ Center </li></ul><ul><li>Power and Energy saving </li></ul><ul><li>Trouble shooting </li></ul><ul><li>Remedial Action </li></ul><ul><li>Legislations </li></ul><ul><li>Data Archive </li></ul><ul><li>Certification </li></ul>
  13. 16. Sampling point A Sampling point B
  14. 17. Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B
  15. 18. Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B
  16. 19. Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B

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