Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling

Table 1

Comparisons of the characteristics of each surface and their heating and cooling performances under typical summer environmental conditions of Hefei, China.

	Function				/%	/%	°C	q; W·m^−2
Conventional solar heating surface	Heating	0.93	0.05	0.05	100	≈0	29.2	≈0
Conventional radiative cooling surface	Cooling	0.12	0.74	0.32	≈0	100	10.8	36.1
TPET composite surface	Heating and cooling	0.92	0.80	0.55	76.8	75.0	15.6	35.6
Ideal composite surface	Heating and cooling	1.00	1.00	0	80.6	166		47.2

and q are equilibrium temperature and radiative cooling power of each surface, respectively.