| 摘要 |
A system is described for use with a solar concentrator such as a parabolic dish type that concentrates solar radiation onto a small opening (18) of a receiver, for protecting the receiver in certain circumstances, including tracking failure wherein the concentrated solar radiation would fall on the face plate (26) surrounding the receiver opening and burn it, or in the event of lack of coolant circulation which could cause burning of the receiver cavity walls (22). The protective system includes a shutter mechanism (30) stored in an open configuration beside the receiver opening and operable in case of failure to close shutters (34) over the opening, while also moving the mechanism away from the opening and closer to the dish concentrator so that only less concentrated solar radiation must be blocked by the shutter mechanism. The shutter mechanism can include a fuse wire (52) having one portion surrounding the receiver opening and another portion which supports the shutter mechanism against moving towards its closed position. A tracking failure causes concentrated sunlight to strike the fuse wire to break it and allow the shutter mechanism to move towards a closed position.
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