Non-power cooling device for underwater datacenter

A cooling device for an underwater datacenter, which is adapted to perform heat exchange between internal devices of the underwater datacenter and seawater, the cooling device comprising:

• an inlet duct disposed on one surface of the underwater datacenter and having a seawater introducing passage defined therealong, the inlet duct comprising:
• a seawater introducing part having an inlet open to introduce the seawater thereinto;
• an inlet duct connection part whose at least a portion comes into close contact with an outer surface of the underwater datacenter and whose bottom is open to move the seawater to a heat exchanger;
• and
• an introduction passage part connecting the seawater introducing part and the inlet duct connection part to each other and having a passage with a curved outer surface;
• and
• outlet ducts spaced apart from the inlet duct and having seawater discharging passages defined therealong, each of the outlet ducts comprising:
• a seawater discharging part having an outlet open to discharge the seawater;
• an outlet duct connection part whose at least a portion comes into close contact with the outer surface of the underwater datacenter and whose bottom is open to move the seawater from the heat exchanger;
• and
• a discharge passage part connecting the seawater discharging part and the outlet duct connection part to each other and having a passage with a curved outer surface,
• wherein the heat exchanger whose one side is connected to the inlet duct and whose another side is connected to the outlet ducts, while surrounding outer surfaces of the internal devices of the underwater datacenter.