Designing and Evaluating an Innovative Solar Air Collector with Transpired Absorber and Cover

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**
𝐹∗𝑃	5	0.015	84.428**
𝐹∗𝑇ℎ	5	0.001	7.517**
𝑃∗𝑇ℎ	1	0.000	4.972
𝐹∗𝑃∗𝑇ℎ	5	0.001	3.168
Error	48	0.002

**Significance level of 1%.