High Performing Buildings - Fall 2013 - (Page 26)

Atrium Daylighting. The daylight design of the atrium consists of three key design elements: • An automated blind that regulates light penetration into the atrium; • Different window sizes for each floor; and • Reflective aluminum panels. The automated atrium glazing roller blind consists of 24 individual blinds that can form six configurations depending on the outdoor light levels. The blinds allow 30% of the light through to ensure daylighting for the offices facing the atrium even when the atrium blinds are fully engaged. Two light sensors on the atrium glazing control the blind operation. The principal control strategy aims to block direct sunlight penetration into the offices and to moderate the light level in the atrium, so it is “just right” throughout the day. Daylight availability decreases deeper into the atrium. For the upper floors, windows are replaced 26 Skylight. At the lounge area outside the small theater on level seven is a skylight that takes in mostly diffuse light from the southern part of the sky. The skylight brings in sufficient light to illuminate the lounge area, eliminating the need for electric lights during the day. Lighting System and Control Daylight Responsive Lighting Control. To maximize daylighting, the artificial lighting system is daylight responsive. Two light sensors are installed on each façade with one additional sensor on the first floor to measure the atrium light level. A building automation system (BAS) centrally controls electric lights in the daylight zones via light sensors. All work tables have individual task Photo by Lin Ho. Courtesy of Senandun Budiman Sdn. Bhd Photo by Lin Ho. Courtesy of Putra Perdana Development Sdn Bhd Photo by Lin Ho. Courtesy of Senandung Budiman Sdn. Bhd Graywater from the building is recycled in a mini wetland area, reducing potable water demand for irrigation. Microorganisms living on the root of the reed bed cleanse the water before it is released. with white walls (to reflect light deeper down the atrium), while floor-to-ceiling windows are used for the lower floors. Aluminum panels mounted on the fourth and fifth floor of the atrium walls reflect light to the first and second floors. Top An automated roller blind controls lighting in the atrium. Its various configurations help prevent direct sun while still illuminating the space. In this image, it is fully engaged. Above The blinds open completely when conditions allow. White walls and aluminum panels deflect light into the lower floors. lights, providing flexibility and comfort of individual light control. Energy-Efficient Electric Lights. General office lighting is ceiling suspended with electronic ballasts and T5 tubes of 104 lumen/W efficacy. Compact fluorescent downlights are used in the common areas and T5 light fittings are used in the garage. internaL CooLing SyStem Floor Slab Cooling Mechanical Ventilation Source: Greening Asia – Emerging Principles for Sustainable Architecture Floor slab radiant cooling and a mechanical air-side system provide conditioning and ventilation. The concrete floors are charged each night, acting as a rechargeable battery as they release cooling throughout the day. HigH Performing Buildings fa l l 2 0 1 3

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2013

High Performing Buildings - Fall 2013
Commentary
Contents
Alliance Center
Malaysia Energy Commission HQ (Diamond Building)
IAQ in HPB Case Studies
EcoCommercial Building, Noida
25 York Street
Technology
Advertisers Index

High Performing Buildings - Fall 2013