Evaluation and Optimization Design for Microclimate Comfort of Traditional Village Squares Based on Extension Correlation Function

Table 4

Emission and absorption coefficients of solar radiation.

Component	Material	Surface attribute	Color	Emissivity	Absorptivity
Roof	Reddish brown clay tile roof	Old	Reddish brown	0.85∼0.95	0.65∼0.74
	Gray tile roof	Old	Light gray	0.85∼0.95	0.52
Wall	Lime powder wall	Smooth and new	White	0.85∼0.95	0.48
Water body	Silicate brick wall	Unsmooth	Red	0.85∼0.95	0.50
	Water (lake, and sea surface)	—	—	0.95∼0.99	0.96
Vegetation	Green grass	—	—	0.97∼0.99	0.78∼0.80
	Permeable brick	—	—	0.85∼0.95	0.74
	Grow-through paver	—	—	0.85∼0.95	0.74
Road and square	Ordinary cement	—	Gray	0.85∼0.95	0.74
	Asphalt pavement	—	Dark gray	0.9	0.87
	Soil	—	—	0.9	0.80