Analysis on Operating Characteristics of Solar-Geothermal Coupled Crude Oil Heating System
The crude oil is susceptible to solidification accidents triggered by external low temperatures during the static storage period. Conventionally, the utilization of gas-fired boilers is the standard approach to address solidification accidents in crude oil static storage, but this method exhibits notable drawbacks such as high energy consumption, low thermal efficiency, and high pollution. Solar-geothermal coupled system is a feasible solution for crude oil heating, which leverages time complementarity and thermal complementarity for solar energy and geothermal energy synergistic coupling. A transient system simulation program was used to establish a solar-geothermal energy synergistic crude oil heating system, and the operating characteristics of the system were analyzed. Then the system operation control strategy was optimized, and its environmental and economic benefits were evaluated. The results showed that during the operational cycle, the temperature of the crude oil in the floating roof tank was higher than the design static storage temperature, indicating that the system design was reasonable. The total annual heat supply was 11977.2 GJ, with the solar collector providing 63.13％ of the heat, while the ground source heat pump system provided 36.87％. After one operational cycle, the average temperature drop in the underground soil was 0.54％.
Solar energyGeothermal energyCrude oil heatingOperating characteristicsRenewable energyNumerical simulation
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