Sustainable Development of Compressed Air Systems

During the strategic convergence of Industry 4.0 and the dual carbon goals, compressed air systems, as the third largest energy-consuming carrier in manufacturing (accounting for 10-15% of industrial electricity consumption), are undergoing a paradigm shift from single energy supply devices to intelligent energy hubs.

In 2012, the Harvard Business Review noted, “A common misconception is that responsible or sustainable investments are those that you can embrace yourself, with a warm feeling, belonging to the category of good intentions. The inevitable consequence is a decline in investment returns, sustainability, and the risk of being phased out. Sometimes, it may be worse than that.” The article also mentioned that companies using less energy and water, and creating less waste per unit of revenue, often generate higher investment returns compared to less resource-efficient competitors.

In the context of rising energy costs and carbon reduction pressures in global manufacturing, compressed air systems, plagued by the “three inefficiencies” (average energy utilisation rate of only 10-15%, leakage rate as high as 30%, and load matching rate below 60%), have become a critical breakthrough for industrial energy conservation. According to the International Energy Agency (IEA) 2023 Industrial Energy Efficiency Report, global industrial compressed air annual electricity consumption amounts to 2.8 trillion kilowatt-hours, exceeding the total annual electricity consumption of the United Kingdom.

This article proposes a comprehensive solution for building a sustainable energy supply system throughout the lifecycle of compressed air systems, based on the ISO 11011 evaluation system. This solution covers three dimensions: technology, management, and ecology. By implementing multiple activities and technologies, such as leakage detection, heat recovery, control systems, and variable-frequency drives, compressed air systems can become more sustainable. This is not just about energy savings; it also brings benefits to factories such as cost reduction, safety, environmental protection, brand influence, and is crucial for the economic and social well-being of future generations.

The sustainable development direction of compressed air systems can be achieved through the following technological advancements.

• Energy efficiency diagnostic technology for compressed air systems
• Innovations in energy recovery technology
• Smart control system architecture
• Efficient drive solutions
• Implementation directions

Boston Consulting Group predicts that the global market size for industrial compressed air system energy conservation will exceed $100 billion by 2030. Through the comprehensive implementation of the solutions proposed in this article, manufacturing enterprises can achieve a 25-40% reduction in energy consumption per unit output, a 5-8% increase in carbon quota trading revenue within 3-5 years.