Research on long-term operation performance evaluation method for solarthermal photovoltaic systems based on energy-carbon flow process

Addressing the long evaluation period of “post-evaluation” based on actual tests and the large deviation of simulation-based “pre-evaluation” from actual results in current solar thermal photovoltaic system evaluation methods, this paper investigates the average annual performance of solar thermal photovoltaic systems under typical operating conditions based on the energy-carbon flow process, proposes a method to adjust the operation performance under different meteorological conditions, and establishes an evaluation scheme for carbon reduction based on the average annual carbon reduction rate, carbon production rate and carbon lock-in rate of the nodes. To verify the effectiveness of the modification method and the carbon emission reduction evaluation scheme, the annual average modified carbon reduction amount and carbon lock-in amount of the nodes are randomly selected and compared with their annual average simulation values. The results show that the modification values of the annual average carbon reduction amount at the production side have absolute values of deviation percentage that do not exceed 10% compared with the simulation values, and the modification values of the annual average carbon lock-in amount of the storage water tank have deviation percentage absolute values that do not exceed 5% compared with the simulation values. This study provides a simple method for quickly evaluating the long-term operation performance of solar thermal photovoltaic systems.