The Secrets Hiding In Singapore's Greenest Buildings | Singapore Hour

Key Concepts

• Microclimates: Variations in climate conditions within a small area, influenced by factors like light, wind, and shade.
• Biophilic Design: Incorporating natural elements and patterns into the built environment to enhance human wellbeing.
• Centralised Cooling Systems (CCS): A district cooling approach where a central plant produces chilled water distributed to multiple buildings for air conditioning.
• Urban Heat Island Effect: The phenomenon where urban areas experience significantly warmer temperatures than surrounding rural areas.
• Computational Fluid Dynamics (CFD): Using numerical methods and data to solve and analyze problems that involve fluid flows.

Marina One: Breathing Life into the CBD

Marina One exemplifies a departure from traditional skyscraper design, prioritizing integration with nature within Singapore’s Central Business District (CBD). The development, comprised of four towers, features a “Green Heart” – a 34-storey high garden designed to naturally cool the space. This is achieved through strategically placed gaps between buildings that facilitate airflow, and layered planting selected based on specific microclimates present at different levels. Plants less tolerant of direct sunlight are positioned in shaded areas, while those suited to coastal conditions are placed in windier locations.

Terrence, the landscape architect, emphasized the goal of creating a building that “shouldn’t feel sterile,” aiming for greenery to be an integral “fabric” of the structure. Maintaining this urban garden requires constant monitoring by a team led by Rosli, who oversees 160,000 plants, assessing factors like pest infestations, leaf colour, and moisture levels. Irrigation is automated but supplemented with manual adjustments due to variables like leakage and the short duration of automated cycles (typically 10 minutes). The intention is to create a less “claustrophobic” environment, offering a respite from the office setting with “the comfort of the green and the sounds of the waterfall.”

Khoo Teck Puat Hospital: A Jungle Within Walls

Khoo Teck Puat Hospital demonstrates a commitment to biophilic design, intentionally integrating nature into the healthcare environment. The hospital is designed to immerse patients, staff, and visitors in an environment reminiscent of a jungle, incorporating sounds of water and the scent of rain after rainfall. Donald, involved in the hospital’s planning, explained the concept was to create a space that doesn’t feel “sterile and cold.”

Senior ICU nurse Liyana observed that patients are “more at peace and calm” when looking at the greenery visible through full-length windows, leading to improved patient approachability during care. Beyond aesthetics, the hospital’s design leverages natural ventilation by strategically positioning blocks to catch wind, a process validated through computational fluid dynamics (CFD) and architectural scale models. This approach reduces reliance on air conditioning, which typically accounts for 60% or more of a hospital’s electricity consumption, and studies indicate that exposure to natural elements accelerates patient recuperation.

Tengah: District Cooling for a Sustainable Future

The new town of Tengah introduces a novel approach to cooling, utilizing Centralised Cooling Systems (CCS). Unlike traditional neighbourhoods where each home has its own air conditioning unit, Tengah employs a centralized system serving 6 to 15 HDB blocks. This system consists of chillers, pumps, and cooling towers that produce chilled water distributed through a network beneath walkways and rooftops.

Liyang, part of the CCS team, explained that the chillers cool water using a highly efficient process that dissipates heat through cooling towers, making it more efficient than conventional air conditioning. Within each flat, a fan coil unit circulates air over chilled pipes to cool the room. CCS also mitigates the urban heat island effect by eliminating outdoor condensing units, reducing the “stack effect” where heat rises from lower units. The system is continuously monitored remotely by engineers who track temperature and flow, and undergoes monthly preventative maintenance and instrument calibration to ensure optimal performance and longevity.

Logical Connections & Synthesis

The video demonstrates a consistent theme: proactive integration of nature into urban environments to enhance wellbeing, reduce energy consumption, and improve quality of life. Each case study – Marina One, Khoo Teck Puat Hospital, and Tengah – represents a different scale and application of this principle. Marina One focuses on incorporating greenery into a dense commercial space, the hospital prioritizes biophilic design for healing, and Tengah implements a large-scale infrastructure solution for district cooling.

The video highlights that sustainable design isn’t limited to parks or public spaces but can be seamlessly integrated into even the most unexpected locations. The success of these initiatives relies on a combination of thoughtful design, technological innovation (like CFD modeling), and diligent maintenance.

Quote: “A building shouldn’t feel sterile.” – Terrence, Landscape Architect, Marina One.

The main takeaway is that cities can be designed to work with nature, rather than against it, creating more livable, sustainable, and healthier environments for all.