Power generating apparatus of renewable energy type

A power generating apparatus of renewable energy type which generates power from renewable energy, comprising:

• a tower;
• a nacelle which is supported rotatably by a tip portion of the tower;
• a main shaft which is housed in the nacelle and rotates with a blade;
• a hydraulic pump which is housed in the nacelle and is driven by rotation of the main shaft;
• a hydraulic motor which is driven by operating oil supplied from the hydraulic pump;
• a generator which is coupled to the hydraulic motor;
• an operating-oil line which is provided between the hydraulic pump and the hydraulic motor and through which the operating oil circulates;
• a cooling-medium line through which cooling medium for cooling the operating oil circulates via an intermediate heat exchanger;
• and
• a main heat exchanger which cools the cooling medium by heat exchange with cool water source which is one of sea water, lake water, river water and groundwater around a base portion of the tower,
• wherein one of the operating-oil line and the cooling-medium line comprises:
• a first piping which is supported on a nacelle side;
• a second piping which is supported on a tower side;
• and
• a connection part which connects the first piping and the second piping so that the first piping and the second piping are relatively rotatable.