Dynamic energy transport analysis of crude oil heating system with solar energy

Key words:  floating roof oil tank  solar energy  phase change thermal storage  temperature maintenance  energy transport

Abstract:

Improving the solar energy utilization for heating crude oil in the floating roof oil tank provides a new way to reduce the energy consumption and broaden the application of solar energy. A long-term energy transport model of crude oil heating system with solar energy was established, and the energy transport and the dynamic mechanism of the system were explored. The results show that the maximum cumulative root mean square error and the standard mean bias error between the simulated and experimental values are 7.86% and 7.29%, respectively, which indicates that the model is effective. Under the condition of combined heating of evacuated tube solar collector, phase change heat storage tank and auxiliary heat source, the system can achieve a stable operation by means of the controller. The average temperature of crude oil higher than the design temperature and the average temperature of the phase change material higher than the phase transition temperature account for 74.9% and 50.96% of the whole year, respectively. The maximum heat supply proportion of the phase change heat storage tank and the evacuated tube solar collector account for 34.16% and 67.07%, respectively.