Solar Thermal System Evaluation in China

Table 1

Requirement for the solar energy fraction in different solar energy resource regions.

Solar energy; resource region	Solar water; heating system	Solar space; heating system	Solar air-conditioning system
Extremely rich
Abundant
Richer
Normal

Note: the solar energy resource region in Tables 1, 5, 6, and 7 is divided by the annual solar hours and annual solar irradiation on the horizontals, detailed in the appendix of the Chinese national standard for solar heating system (GB 50495-2009).