Patent ID: 8684682

Claim:
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 at least one of sea water, lake water, river water or groundwater around a base portion of the tower, wherein at least one of the operating-oil line or 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.