Siemens Solution Helps San Diego International Airport with Sustainability Efforts

August 17, 2021 | San Diego, CA

As part of its ongoing environmental improvement strategy, the San Diego County Regional Airport Authority (Airport Authority) implemented a chilled water system optimization at the San Diego International Airport’s central utility plant. The Demand Flow® chilled water system optimization from Siemens will reduce energy consumption, extend equipment life, and improve occupant comfort.


Five chillers of varying sizes and types were installed at the plant during the last 25 years. Siemens upgraded the chilled water system with high accuracy sensors that allow for monitoring through centralized energy optimization controls. Demand Flow control runs the chillers at higher efficiency, allowing for more effective cooling with less equipment and energy. Rather than shifting energy from one system to another, the holistic chilled water optimization solution reduces overall total system energy consumption, while delivering increased system redundancy.


Demand Flow control depends on the building automation system for programming, calculated variables, and decision-making based on the results of those variables. A graphical user interface (GUI) enables operators to monitor, command, and control the components of the chilled water system. The improved insight and flexibility of control helps operators trend and track performance, foresee maintenance issues, and make repairs on the chilled water system.


“We are seeing significantly improved efficiency of our chilled water system which saves money and helps meet our strategic energy plan goals,” says Airport Authority Energy and Water Manager Cogan Semler. “The dashboard allows us to see how the chilled water system components interact and allows our operators to better understand operational and maintenance considerations to keep things optimized.”


Siemens has a long-standing relationship with the Airport Authority, having provided various building automation, fire/life safety, and security technologies as well as baggage handling, passenger security screening, and air bridge HVAC operations.


The Airport Authority instituted one of the first sustainability policies for a major U.S. airport. This formalized the Airport Authority’s commitment to an environmentally sustainable future for the airport and the region. The Airport Authority is committed to building and operating sustainably and strives to protect the wide variety of natural resources that exist at San Diego International Airport’s location. Learn more about its Sustainability Management Program.


Demand Flow is a registered trademark of Siemens and/or its affiliates in some countries.

About Siemens

Siemens Smart Infrastructure (SI) is shaping the market for intelligent, adaptive infrastructure for today and the future. It addresses the pressing challenges of urbanization and climate change by connecting energy systems, buildings and industries. SI provides customers with a comprehensive end-to-end portfolio from a single source – with products, systems, solutions and services from the point of power generation all the way to consumption. With an increasingly digitalized ecosystem, it helps customers thrive and communities progress while contributing toward protecting the planet. SI creates environments that care. With around 70,000 employees worldwide, Siemens Smart Infrastructure has its global headquarters in Zug, Switzerland, and its U.S. corporate headquarters in Buffalo Grove, Illinois, USA.


Siemens Corporation is a U.S. subsidiary of Siemens AG, a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for more than 170 years. Active around the world, the company focuses on intelligent infrastructure for buildings and distributed energy systems and on automation and digitalization in the process and manufacturing industries. Siemens brings together the digital and physical worlds to benefit customers and society. Through Mobility, a leading supplier of intelligent mobility solutions for rail and road transport, Siemens is helping to shape the world market for passenger and freight services. Via its majority stake in the publicly listed company Siemens Healthineers, Siemens is also a world-leading supplier of medical technology and digital health services. In addition, Siemens holds a minority stake in Siemens Energy, a global leader in the transmission and generation of electrical power that has been listed on the stock exchange since September 28, 2020. In fiscal 2020, Siemens Group USA generated revenue of $17 billion and employs approximately 40,000 people serving customers in all 50 states and Puerto Rico.


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