Sensitive Analysis for the Efficiency of a Parabolic Trough Solar Collector Based on Orthogonal Experiment

Table 2

The factors and levels graph.

Level	Factors
	Pipe length; (m)	Condensation area; (m)	Diameter; (mm)	Solar radiation intensity; (W/m^2)	Ambient temperature; (°C)	Flow rate; (m/s)	Inlet temperature; (°C)
1	0.1	2	55	200		0.1	30
2	2	4.5	70	600	0	0.2	150
3	7	6.5	100	800	20	0.3	300