Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Lecture 5 Automatic IAQ Management

368 views

Published on

Published in: Technology, Business
  • Be the first to comment

  • Be the first to like this

Lecture 5 Automatic IAQ Management

  1. 1. I. Scientific and Systematic Management of IAQ - for Building Service Professionals II. The Importance of A Standard for IAQ III. Living in Harmony with Nature IV. Building Management of the 21 st Century V. Automatic IAQ Management Systems IAQ Lecture Series Speaker: Kee-Neng Wai, Ph.D Date: Jul 15, 2010 For: Environmental Protection Department
  2. 2. The 21 st Century IAQ Management - Knowledge Based Management - Data Based Management - Problem Solving IAQ Objectives
  3. 3. Our Deteriating Air Quality
  4. 5. 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
  5. 6. HOW TO SAVE 25% ENERGY <ul><li>Example: Sun Hung Kai Centre established in 1981 </li></ul>CO 2 levels: 1970 to 1980 – 315ppm to 340ppm 2010 to 2020 – 400ppm to 450ppm 25% Annual Saving = $5,000,000 saved Reduction in C burnt = 2,500 tons ESOs (Energy Saving Opportunities) Estimated saving 1. To retrofit with energy saving lighting system and electronic air filter 5% 2. Optimization with database IAQ management 10% 3. To improve building ventilation design 10% 4. Motor Power & Efficiency Control 10%
  6. 7. Guidance Notes of Indoor Air Quality in Hong Kong
  7. 8. Carcinogens/ Bacteria/ RSP Parameter Excellent Good Our Proposed guidelines Formaldehyde <24 ppb <81 ppb <100 ppb Radon <150 Bq/m 3 <200 Bq/m 3 <200 Bq/m 3 RSP (PM 10 ) <20 µg/m 3 <180 µg/m 3 (PM 2.5 ) By counts Airborne Bacteria <500 cfu/m 3 <1,000 cfm/m 3 Delete Comfort Factors Parameter Excellent Good Our Proposed guidelines Temperature 20 to 25.5 ºC <25.5 ºC 23  2 ºC Relative Humidity 40 to 70 % <70 % 55  15% Air Movement <0.2 m/s <0.3 m/s Optional Carbon Dioxide <800 ppm <1,000 ppm <1,200 ppm Toxic Gas Parameter Excellent Good Our Proposed guidelines Ozone <25 ppb <61 ppb <100 ppb Nitrogen Dioxide <21 ppb <80 ppb <80 ppb TVOC <87 ppb <261 ppb <300 ppb Carbon Monoxide <1.7 ppm <8.7 ppm <10 ppm
  8. 9. Common Sick Building Syndrome
  9. 10. Monitoring Carbon Dioxide with a Handheld Meter Day 1 measurement Day 2 measurement Time Location 09:00 11:00 13:00 15:00 17:00 PAU 534 559 636 657 629 Location 1 681 997 998 1085 1177 Location 2 697 1030 997 1090 1173 Time Location 08:00 10:00 12:00 14:00 16:00 PAU 539 693 630 834 737 Location 1 584 892 1078 1003 1052 Location 2 569 906 1086 1068 1119
  10. 11. <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>
  11. 12. <ul><li>10 commandments of IAQ </li></ul><ul><ul><ul><li>Visual presentation </li></ul></ul></ul><ul><ul><ul><li>Time as a dimension </li></ul></ul></ul><ul><ul><ul><li>State-of-the-art technology </li></ul></ul></ul><ul><ul><ul><li>Automatic air monitoring </li></ul></ul></ul><ul><ul><ul><li>Data logging </li></ul></ul></ul><ul><ul><ul><li>Computerization </li></ul></ul></ul><ul><ul><ul><li>Information technology </li></ul></ul></ul><ul><ul><ul><li>Quantitative </li></ul></ul></ul><ul><ul><ul><li>Accurate, precise </li></ul></ul></ul><ul><ul><ul><li>Labour saving & cost effective </li></ul></ul></ul>
  12. 13. Demo
  13. 14. <ul><li>How to set up? </li></ul><ul><li>How to interpret? </li></ul><ul><li>How to use the alarm system? </li></ul><ul><li>Problems solving </li></ul>
  14. 15. Install ZigBee antenna Power up SAS Power up wireless unit Start measurement
  15. 17. 100067 – Carbon Dioxide

×