Table 3 Parameters of solar radiation.

From: Numerical study on the impact of wall structure on the thermal performance of double-channel porous solar wall

Solar incidence angle

Direct radiation intensity (W/m2)

Scattered radiation intensity (W/m2)

Scattered on the ground (W/m2)

X

Y

Z

Horizontal plane

Horizontal plane

Vertical plane

61.54

−0.81

0.08

0.58

952.70

67.61

60.79

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