Increased Demand FOR Energy Efficiency & Sustainability
Various building energy-related technologies have been introduced and developed to support these global challenges of reducing building energy consumption and GHG emissions.According to International Energy Agency the operations of buildings account for 30% of global final energy consumption and 26% of global energy-related emissions (8% being direct emissions in buildings and 18% indirect emissions from the production of electricity and heat used in buildings) in the year 2022.The United Nations Environment Program (UNEP) estimates that the energy intensity of the global building sector needs to improve on average by 30% by 2030 to meet global climate goals. While advanced building energy codes can reduce a building energy’s consumption by up to 70%, the adoption of these codes and standards has been growing and are uneven globally. Currently, only 88 countries (including the world’s 25 largest economies) have adopted and made mandatory a building energy code or building energy efficiency standards in at least one city. The rate of urbanization also affects the need of energy efficiency and is growing rapidly – 55% of the world's population lives in urban areas nowadays, and the proportion is set to increase to 68% by 2050.
Governments all over the world are legislating to reduce the energy consumption and CO2 emissions from buildings, and professional organisations are also establishing the relevant certification programs. In the European Union, new regulations demand that all new buildings should have an energy consumption level close to zero. The Energy Performance of Buildings Directive (2018/844/EU) aims to decarbonize national building stocks by 2050.
Hence with all the government regulations and environmental targets,smart buildings are an effective and efficient solution in today’s scenario as smart buildings significantly improve energy efficiency by using sensors and interconnected systems to optimize operations like HVAC, lighting, and resource management, leading to reduced energy consumption and costs. Smart building integrate IoT sensors to monitor occupancy and adjust HVAC and lighting in real time, reducing energy waste. Energy Management Systems (EMS) provide real-time insights, enabling predictive maintenance and efficient energy distribution. Additionally, demand response integration helps shift power consumption to off-peak hours, reducing strain on the grid and lowering costs
Government Regulations & Green Building Initiatives
Government regulations and green building initiatives are major drivers for smart buildings because they create compliance requirements and financial incentives that encourage the adoption of smart technologies. While green buildings focus on environmental impact and resource conservation, smart buildings use technology to help in reaching the targets. These buildings with the help of smart building technology help in achieving cost efficiency. The U.S. Green Building Council has developed the Leadership in Energy and Environmental Design (LEED) certification scheme. LEED certified buildings resulted in $1.2 billion in energy savings between 2015 and 2018. The total number of LEED-Certified Buildings are also increasing. In 2023 and continuing into 2024, China has led in LEED certification with the most projects and certified square meters, followed by Canada. Regulations requiring real-time monitoring of air quality, humidity, and ventilation drive adoption of HVAC automation and smart sensors. The approach of green and smart buildings enables to ensure installation of the energy efficient standards like ECBC, and BEE certified products to achieve maximum possible reduction in energy consumption for buildings, thereby reducing adverse environmental impacts. The following flowchart helps to understand the direct relation between green and smart buildings:
Top 5 Countries and Regions for LEED in 2023
Country
Initiatives / Targets/ Regulations
United States
The U.S. has set Nationally Determined Contributions (NDCs) to reduce greenhouse gas emissions by 50-52% below 2005 levels by 2030 and aims to achieve net-zero emissions by 2050.
Inflation Reduction Act's Green and Resilient Retrofit Program
Builders Challenge aims for 1.3 Billion homes scoring 70 or lower to be constructed by 2030 thereby saving $1.7 billion in energy costs
The United States had over 36,835 LEED-certified projects, covering 4.63 billion gross square feet of space
Others
China
China leads the world in LEED green building certifications outside the United States
By 2025, China targets a 30% improvement in the energy conservation rate for new residential buildings and a 20% improvement for new public buildings in urban areas
Green Building Promotion Action Plan
C40 Cities China Buildings Program
Incentives for Green Retrofit
Others
South Korea
Nearly Zero-Energy Buildings (NZEBs), with mandates for ZEB certification for public and private buildings with specific Gross Floor Area (GFA) thresholds, aiming for high energy independence rates by 2030
EnergyX DY-Building
Building Energy Efficiency Rating System
Others
Canada
Canada aims to reduce greenhouse gas emissions by 45-50% below 2005 levels by 2035, building upon its previous goal of a 40-45% reduction by 2030. This interim target supports the broader Paris Agreement aim of achieving net-zero emissions by 2050
Canada Green Buildings Strategy (CGBS)
Canada Greener Homes Grant and Loan Programs
Green and Inclusive Community Buildings Program
Others
India
Energy Conservation Building Code (ECBC)
Indian Green Building Council
BEE Star Rating for Building
EDGE Program
Others
IoT-Enabled Smart Automation in Buildings
As of end of 2023, there are approximately 15 to 16.6 billion connected IoT devices globally, and this number is projected to grow.The Internet of Things (IoT) and embedded systems provide the foundation of the "Smart Building". Conventional Building Automation Systems (BAS) need modification to fulfill contemporary requirements, turning into scalable, intelligent, and energy-efficient structures via the integration of IoT technology. This transition is crucial for augmenting energy efficiency, improving indoor air quality, and ensuring sustainability. IoT enables uninterrupted connectivity between devices and people at any time and location, allowing for more efficient control of energy consumption and resource use. Utilizing sensor systems in a Building Management System (BMS) allows for the continuous monitoring of characteristics such as temperature, humidity, lighting, and occupancy, hence allowing maintenance engineers to enhance energy management. The deployment of IoT in smart buildings integrates diverse technologies and enhances quality of life and economic growth in metropolitan areas. By communicating through IoT gateways with management systems like a BMS (Building Management System), a BOS (Building Operating System), a BIS (Building Information System), or an EMS (Energy Management System), these IoT devices streamline essential functions such as data visualization, analysis, control, and prediction. These functionalities contribute to elevating the intelligence and efficiency of building.
IoT-enabled energy meters and power use monitors consistently monitor the energy consumption of building systems, such as HVAC, lighting, and electrical devices. This data is compiled and examined via cloud computing platforms or on-site computers to detect energy inefficiencies. Integrating these technologies with predictive analytics models enables smart buildings to proactively modify energy consumption patterns, improve power distribution, and diminish peak load demand.
