ZERO ENERGY BCA ACADEMY. Ang Kian Seng, Building & Construction Authority

Transcription

1 ZERO ENERGY BCA ACADEMY Ang Kian Seng, Building & Construction Authority

2 The Challenges Increasing 80% of buildings to be Green Mark certified Expected $1.6B in annual energy savings

3 Objectives To demonstrate that an existing building is able to achieve net zero energy To serve as a test-bed for integration of Green Building technologies (GBTs) in existing building To be a hub for practitioners and students in the study of energy efficiency and green buildings To give the researchers the means to predict the outcome of various GBTs

4 ZEB Project Team Building Owner Consultants Davis Langdon & Seah Researchers Contractors ACP CONSTRUCTION PTE LTD

5 Design and Implementation of ZEB Design Concept: Energy Balance BCA Academy Solar PV Grid up load Consumption Grid supply Lighting Appliances Air-Con 0 Net Zero

6 Step 1 - Passive Systems Efficient Envelope Type of window glazing Type of wall/facade Minimise Solar Heat Gain Roof garden & vertical greenery Sunshades Capitalize Daylighting Mirror ducts Light pipes Light shelves Guiding Principles Final step Photovoltaics Step 2 - Active Systems Efficient Lighting T5 Fluorescent lights LED task lighting State-of-the art lighting control systems Efficient ACMV Personalised Ventilation Underfloor air distribution system Single coil twin fans Solar chimneys Active Control State-of-the-art building management system

7 Passive Systems

8 Academy Daylight Solutions

9 kwh Academy Performance of Daylighting Systems Lighting System Performance Rated Energy Saving: 12% 7000 Lighting Dimming System VS. Conventional Lighting System Classrooms Exhitbition hall MPC Library CSBC & GBPD DST School Hall Lighting Dimming System Convenrional Lighting System

10 Academy Greenery Systems

11 12:03 AM 2:04 AM 4:05 AM 6:06 AM 8:07 AM 10:08 AM 12:09 PM 3:11 PM 5:12 PM 7:13 PM 9:14 PM 11:15 PM Surface temperature ( C) ZEB@BCA Academy Performance of Vertical Greenery Systems Surface temperature - vertical greenery system Up to 16 o C lower surface temperature Time control-internal control-external greenery-internal greenery-external greenery-on greenery

12 12:03 AM 2:04 AM 4:05 AM 6:06 AM 8:07 AM 10:08 AM 12:09 PM 3:11 PM 5:12 PM 7:13 PM 9:14 PM 11:15 PM Heat flux (W/m²) Academy Performance of Vertical Greenery Systems 6 Heat flux - vertical greenery system Up to 5W/m2 reduced heat transfer Time control greenery

13 Academy Performance of Greenery Systems Greenery system Maximum difference with control wall External surface temperature Heat flux Ambient temperature Energy savings based on heat flux difference Vertical greenery system 1 Vertical greenery system 2 Vertical greenery system 3 Rooftop greenery system 10 C 4 W/m² 2 C higher 4.16 kwh/m²/year 16 C W/m² 2-3 C higher 5.72 kwh/m²/year 6 C 1.75 W/m² 2 C lower 2.86 kwh/m²/year 24 C 53 W/m² 7 C lower 70.2 kwh/m²/year

14 Academy Pioneering Use of Materials Solar Assisted Stack Ventilation Roof metal ventilation duct Solar chimney Metal vertical ventilation duct

15 SOLAR ASSISTED STACK VENTILATION West facade 1 Solar radiation heats the chimney and ducts 2 Hot air flows out of the ducts West facade West facade 3 Hot air flows out from the room 4 Fresh air is induced to flow into the room West facade

16 Academy Performance of Solar Chimney

17 Academy Performance of Solar Chimney

18 Active Systems

19 Academy Personalised ventilation Single Coil Twin Fan Sensors, T5 lights, task lights Displacement Ventilation

20 Academy Innovation in Technology Single Coil Twin Fan Potential Benefits Estimated 7-8% capital cost premium Predicted overall energy savings of about 13% Improved indoor air quality and comfort Attractive payback period < 3 years

21 Academy Performance of SCTF

22 Academy Performance of SCTF with PV Significant reduction in fresh air Personalised ventilation

23 Academy Performance of SCTF With PV

24 Academy Photovoltaics

25 Academy Extend of Photovoltaic Coverage

26 Academy

27 Academy Performance of Photovoltaic Systems Design Operation BIPV Generation (MWh)

28 Achievements

29 Academy Results

30 BCA Green Mark Scheme Raising Energy Efficiency Standard over 2005 design codes GM V3 GM V 4

31 ZEB as Learning Journey 10,763 Visitors since Oct 2009 ACADEMIC, 536 GOV T OFFICIALS, 2169 PUBLIC, 691 PROFESSIONALS, 3306 STUDENTS, 4061 STUDENTS PROFESSIONALS PUBLIC OFFICERS ACADEMIC PUBLIC FOREIGN, 2249 LOCAL FOREIGN LOCAL, 8514

32 Exporting ZEB and Expertise Leaving Sustainable Footprints Tianjin Eco-city ZEB

33 Conference & Exhibition Sharing Experiences, Creating Awareness

34 Accolades

35 Tianjin Eco-city ZEB Architecture Sky garden Light pipes BIPV & AIPV (South) Vertical green wall on the south façade Light shelves Integrated façade design Mechanical/Electrical Ground channel for wind during transition periods Radiant floor heating for winter Demand controlled ventilation for fresh air through CO2 sensors

36 Thank you