Plastic Film Performance Improvement for Heliostats.

摘要

A plastic film improvement program was initiated to improve the BEC enclosed heliostat design and hence its overall performance and cost effectiveness. The initial overall plan for completing the program tasks and for accomplishing all its objectives is represented in the Event Logic Network shown in Figure 1-1. The preliminary candidate materials were screen tested in Boeing laboratories. The materials showing promise were sent to Phoenix for desert exposure testing. After 3 months of accelerated exposure, coupons were withdrawn and tested for degradation. Exposure of first iteration candidate materials continued while second iteration candidates (new materials and modified previously tested materials) were being made available. After 6 months of real time and accelerated exposure first iteration samples were withdrawn and returned for lab tests. Lab testing of second iteration materials were performed after 3 months of accelerated exposure. Exposure testing of the most promising materials will be continued after the end of this contract. (MM).