Energy Saving Tips
1. Introduction
Sunrise Square is a newly proposed commercial building, aimed to secure the BCA Platinum Green Mark award, to be completed by October 2015. The building is fully air-conditioned except for some common areas and it has a multi-storey carpark which is to be naturally or mechanically ventilated. The air-conditioning system for the building is water cooled chilled water system. The cooling load of the system is greater than 500 RT.
The purpose of this project is to recommend the building owner and the design team on developing the right strategies and presenting cost effective measures for the energy efficient component to secure the Platinum award.
2. Areas of Emphasis
To achieve the award, the building must encompass the BCA pre-requisite requirements and a set of other green factors. This report will focus on attaining all components of the energy efficiency segment.
3. Energy Efficiency
3.1 Thermal Performance of Building Envelope - ETTV and Building Envelope- Design/Thermal Parameter
According to the award guidelines for air-conditioned building, the ETTV computed in the Code of Envelope Thermal Performance should be 40W/m². The building also needs to demonstrate a minimum of 30% energy savings.
As for the Building Envelope, it is necessary to minimise a west-facing façade and west-facing windows. The sunshading provision for west-facing windows should have a minimum shading of 30%. The U-value of walls facing the west should be 2W/m²K. Finally, ensure the U-value of the roof does not exceed 1.5 W/m²K.
ETTV is affected by three factors, namely- Building materials, amount and type of glazing and the building orientation.
3.2.1 Building insulation materials
Building insulation materials are used to reduce heat transfer to achieve thermal comfort with reduced energy consumption. They may be grouped by its composition, by its structure, or by its heat reduction function
Sunrise Square is a newly proposed commercial building, aimed to secure the BCA Platinum Green Mark award, to be completed by October 2015. The building is fully air-conditioned except for some common areas and it has a multi-storey carpark which is to be naturally or mechanically ventilated. The air-conditioning system for the building is water cooled chilled water system. The cooling load of the system is greater than 500 RT.
The purpose of this project is to recommend the building owner and the design team on developing the right strategies and presenting cost effective measures for the energy efficient component to secure the Platinum award.
2. Areas of Emphasis
To achieve the award, the building must encompass the BCA pre-requisite requirements and a set of other green factors. This report will focus on attaining all components of the energy efficiency segment.
3. Energy Efficiency
3.1 Thermal Performance of Building Envelope - ETTV and Building Envelope- Design/Thermal Parameter
According to the award guidelines for air-conditioned building, the ETTV computed in the Code of Envelope Thermal Performance should be 40W/m². The building also needs to demonstrate a minimum of 30% energy savings.
As for the Building Envelope, it is necessary to minimise a west-facing façade and west-facing windows. The sunshading provision for west-facing windows should have a minimum shading of 30%. The U-value of walls facing the west should be 2W/m²K. Finally, ensure the U-value of the roof does not exceed 1.5 W/m²K.
ETTV is affected by three factors, namely- Building materials, amount and type of glazing and the building orientation.
3.2.1 Building insulation materials
Building insulation materials are used to reduce heat transfer to achieve thermal comfort with reduced energy consumption. They may be grouped by its composition, by its structure, or by its heat reduction function
References: 1. Building and Construction Authority. (2012). BCA Green Mark for New Non Residential Buildings Version NRB/4.1. [Online] Available: http://www.bca.gov.sg/greenmark/others/gm_nonresi_v4.1.pdf 2 3. Island Concrete Pte Ltd. (2012). Product and Services. [Online] Available: http://www.hlasia.com.sg/bmg/icpl/products.asp 4 6. Prince Landscape and Construction Pte Ltd. (1995). Hi-Green Roof Garden System. [Online] Available: http://www.princelandscape.com/product/green_roof_system.php 7 8. Carrier. (2012). EVERGREEN 23XRV Chillers with Foxfire Technology Marketing Brochure. [Online] Available: http://www.docs.hvacpartners.com/idc/groups/public/documents/marketing/04-811-50012.pdf 9 12. Philips. (2012). myVision LED Bulb. [Online] Available: http://www.philips.com.sg/c/led-light-bulbs/myvision-7w-40w-normal-cap-warm-white-871829116278000/prd/ 13 14. Air King Ventilation Products. (2012). Model:ES130DG Dual Speed Motion Sensing Exhaust Fan. [Online] Available: http://www.airkinglimited.com/pages/exhaust/es130dg.html 15 16. Mitsubishi Electric & Electronics. (2012). Diamond Trac Passenger Elevators. [Online] Available: http://www.mitsubishielectric.com/elevator/products/asme/elevators/diamond_trac/pdf/catalog.pdf 17 18. SM Solar. (2012). Solar Panels. [Online] Available: http://www.smsolar.net/solar_panels.html