Rotor blade for wind energy plant utilized in cold regions, has heating device for heating air stream from fan unit and arranged separately from fan unit in blade tip-side portion of middle channel

摘要

The blade (10) has two partition walls (18, 20) forming an open middle channel (16) and an open protruding edge channel (28) at its corresponding ends. The channels stand in connection with each other at its ends. A fan unit (30) produces an air stream (40) through the middle channel, where the air stream passes through a heating device (38). The device heats the air stream and is arranged separately from the fan unit in a blade tip-side portion (14) of the middle channel, where cross-section of the tip-side portion is tapered with respect to cross-section of middle channel in a blade root.