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Princess Palace Hotel, Bangkok 13-14 th December 2006

Revised Building Energy Code Professor Surapong Chirarattananon, AIT and Mr. Sitphan Kanla, Naresuan University. Princess Palace Hotel, Bangkok 13-14 th December 2006. Outline:. Existing Code Features of Revised Building Energy Code. The Energy Conservation Promotion Act B.E. 2535

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Princess Palace Hotel, Bangkok 13-14 th December 2006

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  1. Revised Building Energy CodeProfessor Surapong Chirarattananon, AITandMr. Sitphan Kanla, Naresuan University Princess Palace Hotel, Bangkok 13-14 th December 2006

  2. Outline: • Existing Code • Features of Revised Building Energy Code

  3. The Energy Conservation Promotion Act B.E. 2535 BHUMIBOL ADULYADEJ REX. Given on the 2nd day of April B.E. 2535 The Royal Decree on Designated Building B.E. 2538 Given on the 17th day of July B.E. 2538 A set of Ministerial Regulations B.E. 2538 Existing Building Energy Code, Gazetted in 1995

  4. Existing Building Energy Code, Gazetted in 1995 Requirements on Designated Buildings in the Ministerial Regulation USA ASHRAE Std & Singapore energy code as models Building and Systems • Overall Thermal Transfer Value (OTTV) of the building envelope < 45 Wm-2, new building • Efficient Electric Lighting < 16 Wm-2 office. • Efficient chillers and compressors (not the system). Building Energy Management • Conduct energy audit • Plan and retrofit building • Report energy use European and USA codes as models

  5. Features of the New Building Energy Code • 1. The new code applies to new buildings only. • 2. System performance requirementsare used. The target systems are: •  building envelope •  lighting system •  air-conditioning system • 3. Differentiationare made for different types of building. • A new OTTV formulation for each type of building • Type of building OTTV formulation • office & school • hotel & hospital • superstore & dept store • One OTTV formulation for each type of building

  6. Features of the New Building Energy Code 3. (cont.)A new lighting power budget for each type of building (e.g. 14 Wm-2 for office) - A system performance regime for each main type of air-conditioner (e.g. EER > 9.6 for split type A/C) Each minimum performance level is set from a life cycle cost study for each system requirement through use of computer simulation for each type of building. Type of building Minimum performance level required OTTV Lighting Air-conditioning office hotel & hospital etc. One level for each system and each building type

  7. Features of the New Building Energy Code • The OTTV of each of the exterior surface wall (OTTVi) shall be calculated from • OTTVi = (Uw)(1-WWR)( TDeq) + (Uf)(WWR)(DT) • + (WWR)(SHGC)(SC)(ESR) • One set of values of the parameters TDeq, DT, and ESR is given for each category of building. • TDeq is a function of solar absorptance of surface,specific heat- density-mass of wall, orientation of wall, • inclination angle of wall • This is developed from regression of cooling coil, and is related directly to cooling coil load and energy consumption of a building.

  8. Energy Performance Requirements on Building Envelope Summary • The Overall Thermal Transfer Value (OTTV) of wall of a building represents the size of the average heat gain through the envelope (inclusive of walls and windows) as sensed by the air-conditioning system of the building. • For office or school, O-OTTV < 50 Wm-2 • For Department store or hypermarket, S-OTTV < 40Wm-2 • For Hotel or hospital, H-OTTV < 30 Wm-2 • For roof of , • Office and school, O-RTTV < 15 Wm-2 • Department storeor hypermarket, S-RTTV < 12 Wm-2 • Hotel or hospital, H-RTTV < 10 Wm-2

  9. Energy Performance Requirements for Lighting Summary Allowable rated power for lighting.

  10. Energy Performance Requirements for Air-conditioning Energy performance of air-conditioning system(s) within a building Minimum performance for unitary air-conditioners

  11. Energy Performance Requirements for Air-conditioning Large air-conditioning system When a large air-conditioning system is used, energy performance is required on the water chillers, and on other parts of the air-conditioning system. Minimum performance for water chillers.

  12. การใช้แสงธรรมชาติเพื่อการส่องสว่างการใช้แสงธรรมชาติเพื่อการส่องสว่าง ภายในอาคาร • การใช้ประโยชน์จากแสงธรรมชาติอย่างเหมาะสมเพื่อการส่องสว่างภายในอาคารนอกจากจะช่วยลดการใช้พลังงานไฟฟ้าในระบบแสงสว่างแล้วยังสามารถลดภาระการทำความเย็นของระบบปรับอากาศ • ในBuilding code ใหม่นี้ได้คำนึงถึงประโยชน์ของการใช้แสงธรรมชาติจึงได้กำหนดแนวทางในการชดเชยเกณฑ์มาตรฐานขั้นต่ำของระบบแสงสว่างที่มีผลสืบเนื่องจากการใช้แสงธรรมชาติเพื่อการส่งสว่างภายในอาคารควบคุม

  13. ค่ารังสีอาทิตย์(Effective Solar Radiation; ESR) ค่ารังสีอาทิตย์คือรังสีอาทิตย์รวมที่ตกกระทบบนผนังมีค่าขึ้นอยู่กับมุมเอียงและทิศทางการวัดค่ามุมเอียงของผนังของอาคารวัดจากมุมที่ผนังอาคารกระทำกับพื้นผิวโลก (หรือพื้นดิน) โดยผนังในแนวตั้งจะมีค่ามุมเอียงเท่ากับ 90 องศาขณะที่ผนังในแนวระนาบนอน (หรือหลังคาแบบเรียบ) จะมีค่ามุมเอียงเท่ากับ 0 องศา

  14. ค่ารังสีอาทิตย์(Effective Solar Radiation; ESR)

  15. End of presentation… Thank you for your attention…

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