The present invention relates to a construction and development method of a hydrocarbon production facility, comprising the steps of supplying functional modules (16A, 16B) including a hybrid cooling system (34) to a site, and equipment of the functional modules (16A, 16B) at the site It includes a step of verifying the development, a step of installing the functional modules (16A, 16B) on a support structure, and a step of moving the support structure to a development site in a wide area of water. The decrementing step includes passing the flow to be cooled through an air cooler of the hybrid cooling system 34 , and the flow is entirely cooled by the flow circulating through the air cooler of the hybrid cooling system 34 . The step of developing hydrocarbons in the open water body includes passing the stream to be cooled through a water cooler of the hybrid cooling system, and the stream is cooled by heat exchange with water from the water body circulating the water cooler.
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