Signed in 2007, the contract, worth €110 million, includes utilities management (chilled water, watering systems, wastewater collection and treatment and drinking water distribution).
This has been supplemented by a comprehensive building management contract for all infrastructure, including public parks, roads, bridges and public lighting.
Bahrain Bay - cooling an island
In the Kingdom of Bahrain, a new island is emerging from the blue waters of the Persian Gulf - Bahrain Bay.
It is a mixed-use project of housing, hotels and offices totaling 1.5 million square meters.
The utilities management contract covers a large cooling network: 4.2 kilometers of pipes, 160 MW of cooling capacity with 20 chilled water units, and a wastewater treatment center with a capacity of 7,000 cubic meters per day.
In order to get around the lack of water in Bahrain, Dalkia will reuse wastewater from 20,000 people, and will pump water directly from the sea to top up the cooling towers with untreated brine. "The contractwas won thanks to a holistic approach,not simply focused on production of chilled water," says Arnaud Martinez, Project Manager for Bahrain Bay. "As well as frugal management of water resources, we have used a series of very innovative technical solutions." For instance,the installation of refrigeration units in parallel rather than in series to optimize temperature variations between the units and the use of a variable primary flow rate to reduce the number of pumps increases the plant's efficiency and performance, while reducing its footprint.
Arnaud Martinez sees a very promising future for Dalkia's cooling networks in the Middle East. " The Bahrain Bay contract and the presence of a team on the ground have already led to signing of the 90 MW Al Aren contract in May 2007. These utilities distribution contracts should lead to many maintenance and comprehensive building management contracts." New projects are currently being negotiated in the Middle East, in particular in Bahrain and Saudi Arabia.
4.2 kilometers of pipes.
160 MW of cooling capacity with 20 chilled water units.
1 wastewater treatment center with a capacity of 7,000 cubic meters per day.
Lowering the temperature with heat exchangers
Cooling networks
The refrigeration and cooling market is fast growing, with different solutions being offered, from individual to centralized air-conditioning. And of course, what is often the most appropriate solution - cooling networks.