Deep Lake Water Cooling System

Toronto's Deep Lake Water Cooling (DLWC) system is an innovative district energy project that uses the naturally cold waters of Lake Ontario to provide sustainable air conditioning to downtown buildings while supporting the city's drinking water supply. One of the largest systems of its kind in the world, the project significantly reduces energy consumption and greenhouse gas emissions by replacing conventional air conditioning with an environmentally responsible cooling solution.

ACCIONA served as the general contractor for the design implementation and construction of the Deep Lake Water Cooling system, delivering the intake pipelines, heat exchange plant, valve chambers, equipment installation, testing, and commissioning. The project included the installation of three underwater intake pipelines extending five kilometres into Lake Ontario, enabling cold water drawn for the municipal drinking water system to be used for cooling before entering the city's potable water network.

The construction of the intake system required the installation of approximately 15 kilometres of 1.6-metre-diameter high-density polyethylene (HDPE) pipeline on the bed of Lake Ontario at depths reaching 83 metres. Specialized marine construction techniques and precision installation ensured the integrity of the underwater infrastructure while protecting the surrounding aquatic environment.

The Deep Lake Water Cooling system demonstrates how existing municipal infrastructure can be leveraged to deliver significant environmental and economic benefits. By utilizing the stable temperature of deep lake water for both municipal drinking water and sustainable building cooling, the system reduces cooling energy consumption by up to 90 percent compared with conventional air-conditioning systems, lowers greenhouse gas emissions, and provides reliable cooling to many of Toronto's largest commercial, institutional, and government buildings. As one of the world's leading district energy systems, it has become an internationally recognized model for innovative, low-carbon urban infrastructure.

GENERAL PROJECT INFORMATION

Client: Enwave Energy Corporation ant the City of Toronto
Location: Toronto, Ontario
Contract type: General Contractor
Contract Value: Approximately C$100 million
Project Team: ACCIONA (General Contractor)
Project Status: Completed in 2004

PROJECT SCOPE

Installation of approximately 15 km of 1.6 m diameter HDPE intake pipeline
Construction of three 5 km deep lake intake pipelines extending into Lake Ontario
Installation of 36 large heat exchangers
Construction of the heat exchange plant and valve chambers
Equipment installation, testing, and commissioning
Marine construction and pipeline installation at depths of up to 83 metres

INNOVATION & SUSTAINABILITY

The Deep Lake Water Cooling system is recognized as one of the world's leading examples of sustainable district energy infrastructure. By using the naturally cold water drawn from deep within Lake Ontario for both municipal drinking water and building cooling, the system eliminates the need for conventional electrically driven chillers, reducing cooling energy consumption by up to 90 percent and substantially lowering greenhouse gas emissions.

The project also demonstrates innovative integration between municipal water and district energy infrastructure, maximizing the value of existing assets while providing a reliable, resilient, and environmentally responsible cooling solution for Toronto's downtown core.

INFORMATION ON DATA PROTECTION

In compliance with Regulation (EU) 2016/679 on Data Protection and with other Data Protection regulations in force, you are hereby informed that your personal data shall be processed by Acciona, S.A. (hereinafter “ACCIONA”), whose identification data are as follows: Tax ID No. (NIF): A08001851; Address: Avenida de la Gran Vía de Hortaleza, 3, 28033 (Madrid); Tel. No.: +34 91 663 28 50. Your data shall be processed in order to send you information, via electronic means, regarding our services, products, activities, news, and the latest updates related to the sectors of activity within the Acciona ecosystem (Sustainability, Innovation, Experience, and People), through your subscription to our newsletters. We will also process your data in order to respond to your comments and manage your inquiries, requests, complaints, or suggestions.

The consent given by the data subject by indicating that they have read and accept this data protection information comprises the lawfulness of processing. The data provide is your email address. If you fail to provide the required data, the subscription Request cannot be satisfied. We may also process your satisfaction or preferences, if you voluntarily respond to surveys. Data shall be stored until the elimination is requested.

In order to carry out our purpose, we may give access to your data to service providers (such as technology service providers) who assist us in fulfilling this purpose. Some of its service providers, may be located outside of the European Economic Area in territories that do not offer a level of data protection that is comparable to that of the European Union. In such cases, we transfer User data with appropriate safeguards and always ensuring the security of the same.

The data subject can exercise their rights of portability and to access, correct, eliminate, restrict and oppose the processing of their data to Acciona, S.A. by writing the Department of Data Protection located at Avenida de la Gran Vía de Hortaleza, 3, 28033 (Madrid) or by submitting the form available at the following link:

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taboola global:user-id	Taboolaopens in a new tab	Sets a unique ID for the visitor, that allows third party advertisers to target the visitor with relevant advertisement. This pairing service is provided by third party advertisement hubs, which facilitates real-time bidding for advertisers.	Persistent	HTML Local Storage
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GENERAL PROJECT INFORMATION

PROJECT SCOPE

INNOVATION & SUSTAINABILITY

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INFORMATION ON DATA PROTECTION