Table 1: Test factors variance analysis of collector efficiency.

Variable df Sum of squares F F 5 2.781 15322.199** P 1 0.009 242.393** Th 1 0.006 177.936** 5 0.015 84.428** 5 0.001 7.517** 1 0.000 4.972 5 0.001 3.168 Error 48 0.002

**Significance level of 1%.