THOUGHTFUL DESIGN

Keppel Bay Tower: A Green Building of the Future

Keppel Land is committed to developing and managing low-carbon buildings, and has set a target to reduce its carbon emission intensity by 40% below 2010’s level by 2030. Testament to the company’s efforts, Keppel Bay Tower, located in the world-class Keppel Bay waterfront precinct, is on track to become Singapore’s first super low-energy high-rise existing commercial building. The BCA Green Mark Platinum development is also fully powered by renewable energy.

Here’s a closer look at Keppel Bay Tower’s revolutionary green features and initiatives:

Singapore’s First Commercial Building to be Fully Powered by Renewable Energy

Keppel Bay Tower is the first commercial development in Singapore to utilise renewable energy to power all its operations, including the offices of tenants in the building. Keppel Land, through its electricity retailer, Keppel Electric, is purchasing Renewable Energy Certificates (RECs) which are generated from photovoltaic (PV) panels installed in Keppel Offshore & Marine’s yards in Singapore. In addition, an assembly of PV panels spanning about 400m2 will be installed on the roof of the 18-storey Keppel Bay Tower, as well as on its six-storey podium block.

Smart and Innovative Solutions

As part of Keppel Land’s efforts to transform Keppel Bay Tower into Singapore’s first super low-energy high-rise existing commercial building, in 2018, Keppel Land received a grant from the Building and Construction Authority of Singapore (BCA) to testbed five innovative technologies which would reduce the building’s energy consumption significantly and improve its energy efficiency by 20% compared to other BCA Green Mark Platinum buildings.

It was the first time that any of these technologies were implemented in a development in Singapore. This has resulted in overall energy savings of about 1.5million kWh per year, or a 22.3% reduction in annualised energy consumption, equivalent to the amount of energy required to power more than 300 five-room HDB flats. These new innovative technologies are:

1.      Intelligent building control system

Keppel Bay Tower’s energy consumption is controlled by a smart building control system. The system uses a simulation model based on available data for energy optimisation. With improved data analytics and better control, the building’s total energy consumption has been reduced by over 5%.

2.      Smart lighting system

The smart lighting system utilises occupancy sensors to control lighting levels according to building occupancy. Photo-sensors dim perimeter lightings when there is sufficient daylight near the window area. This fully autonomous system, implemented across seven floors in Keppel Bay Tower, is over 10% more energy efficient than best-in-class LED lightings.

3.      High efficiency air distribution system

Keppel Bay Tower features air handling unit fans which are about 45% more energy efficient than conventional ones. The fans also run at a lower noise level than regular systems, resulting in a more pleasant environment for building occupants. This system, initially test-bedded on one floor in Keppel Bay Tower, will be implemented throughout the entire building.

4.      Cooling tower water management system

The cooling tower water management technology applied helps to remove and prevent the build-up of solids and sediments in the building’s cooling tower system. It also removes dissolved oxygen from the water, thus slowing down the rate of corrosion. The system also disinfects the water in the cooling towers to prevent the growth of algae and bacteria, thus eliminating the need for chemical treatment. The implementation of the technology improves the system heat transfer efficiency and has resulted in a more than 5% reduction in air-conditioning energy usage.

5.      Integrated sensor system to optimise fresh air intake

This system utilises integrated sensors to optimise the building’s intake of fresh air based on the level of indoor activity being carried out. The system, with machine-learning capability, is test-bedded on one floor in Keppel Bay Tower, and has resulted in over 10% reduction in air-conditioning energy usage, better thermal comfort and a more pleasant indoor environment for building occupants.

Green Leases

As a sustainable landlord, Keppel Land encourages its tenants to adopt green practices. All of Keppel Bay Tower’s offices have been retrofitted with energy-efficient LED lamps in 2020, an initiative that helps tenants enjoy about 30% savings on their utility bills and reduces the total building energy consumption by about 5%.

The company has also successfully influenced all of its office tenants at Keppel Bay Tower to sign green leases. By adopting the practices stipulated in the green leases, tenants are showing their commitment to implement practices that enhance environmental sustainability as well as promote the health, comfort and well-being of their employees.

Published on August 2020