Study on the Dynamic Response Characteristics of SOFC-MGT Combined Cooling Heating and Power System Coupled with Solar Energy

A dynamic model of the combined cooling, heating, and power (CCHP) system of solid oxide fuel cell (SOFC) and micro gas turbine (MGT) coupled with solar energy was established to study the effect of input-side energy fluctuations on the distributed energy system. The effects of direct solar radiation fluctuations on system key parameters were analyzed, and the influence of external load fluctuations on system performance was studied. Results show that, compared to the CCHP system without solar energy coupling, the new system, which uses solar energy to preheat air, reduces fuel consumption by 1%, increases cooling and heating outputs by 17% and 9%, respectively. The integration of trough solar collector (PTC) in the system smooths out the changes in system power generation efficiency with power load and shifts the point of maximum power generation efficiency to the right, which is conducive to increasing the power of the system.