Luis d’Acosta of Schneider Electric highlights the vital steps for retrofitting existing structures.
According to a report by the International Energy Agency, half the world’s current buildings will still be in use in 2050.
That means old, outdated and inefficient buildings will remain prevalent for many decades to come – exactly when we need to be drastically cutting our emissions on the road to net zero.
So, the question arises, how can these buildings become more efficient and sustainable? Facility and building managers fall prey to the misconception that they need to deploy a costly new technology stack.
In reality, they can leverage the solutions already in place, revamping buildings with ease to bring cost effective improvements.
Thanks to technological advances, digital retrofitting today is simpler and less expensive than it was before. Its operational benefits mean the ROI for new technology is typically about three years.
For instance, IoT sensors (that take minutes to install) or power meters can be perfect to gather energy consumption data, which can help make more accurate decisions to reduce the carbon footprint.
What does a retrofitted, self-sufficient building look like? Our offices in Singapore, which act as an office space and innovation hub, were made into a carbon neutral building in the middle of 2020.
It now runs on solar power during the daytime and has been equipped with about 3 000 sensors, allowing the management team to collect useful data to optimise the way the space is used and to reduce its energy consumption as much as possible.
One of the most luxurious hotels in Sydney, Sheraton on the Park, is well known as a leader in the Australian hotel landscape. Owned by Starwood Hotels and Resorts, the hotel has 557 rooms and suites, several dining areas, a heated swimming pool and spa area, and 18 multifunction meeting rooms.
The hotel upgrade involved installation of its HVAC, lighting and chiller systems, and replacing its entire building management system (which was no longer supported by the manufacturer) with Schneider Electric’s EcoStruxure Building.
The retrofit resulted in 15% energy savings in the first month after the upgrade was completed and is therefore a living, breathing example of how businesses, even those with a heavy focus on hospitality, can achieve greater energy efficiencies through the retrofit process.
Three simple steps
There are three simple stages to achieving better energy efficiency and savings when considering whether to retrofit a building or facility.
- Building awareness of energy consumption
Buildings and facility managers should start by asking some basic questions about their current utility usage, such as:
- How much is spent, and how does that break down for electricity, gas, and water?
- What’s using the most energy in the facility – processes, equipment, loads?
- Are there opportunities to reduce energy consumption?
These are important questions, but where can one get this information?
Engaging employees at this point will not only help building and facility managers progress more quickly, but it will also translate into better results in the long term. As a team, organisations can look at data from utility bills and load profiles and energy audits.
- Taking action
The next stage is to ‘fix the basics’ by taking some straightforward actions to reduce energy usage. Here are some examples:
- Equipment upgrades and retrofits.
- The simplest, most easily justifiable way to improve energy efficiency is to replace old equipment with newer, higher efficiency models. Upgrading lighting, HVAC, variable speed drives, or refrigeration systems can, on average, yield between 10 and 15% in energy savings.
- Tuning automation schemes.
- Most automation and control systems are programmed for operational results: buildings are prioritized for comfort and safety; industrial plants focus on productivity and output. By tuning automation schemes, energy savings from 5 to 15% can often be achieved.
- Continuous energy monitoring.
- For top energy performance, continuous monitoring is essential. Building managers can start small with a few meters and software, then build onto the system over time. Having and using an energy management system can reduce energy usage between 5 and 15%.
So why is energy monitoring so important? It reveals how energy is being used everywhere throughout a facility, including helping building managers precisely measure the energy usage of important equipment.
By submetering in this way, they’ll identify and resolve energy anomalies. Without continuous monitoring, it’s likely that a facility will slip back to previous consumption levels.
Best-in-class energy management software will provide facility teams with powerful energy visualisation tools to help identify opportunities and take action.
- Building optimisation
The third stage of any energy management journey for building managers is to step beyond simply tracking energy usage and react when they see energy being wasted. They should now have baselines established for systems and processes throughout their facility and be able to see when actual usage varies from what they expect.
They can regularly make fine adjustments to improve efficiency in a quantifiable way. They can see how they’ve improved energy performance since last year and are on the path to continuous improvement.
Retrofitting buildings to make them more efficient and smarter is the future if we want to meet the European Commission’s goals of improving energy efficiency by 32% by 2030.
It is crucial that we act now and renovate old buildings to bring them up to date in accordance with modern energy standards to create ones that are fit to last for at least another hundred years or more.
About the author
Luis d’Acosta is Executive Vice President of the Digital Energy Division at Schneider Electric