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At LPG filling stations, the most common arrangement for storage tanks is to have them on the ground; the transfer pumps used are usually ordinary hydrocarbon pumps, centrifugal pumps, or vane pumps. However, due to limited space and fire safety requirements, all LPG storage tanks at this station have to be buried underground, which presents process-related challenges. It is the question of what method to use for output. If conventional centrifugal pumps are still used and installed on the ground, cavitation problems are likely to occur since the liquid level in underground storage tanks is significantly lower than the pump inlet. If submersible pumps are to be used, it has been found that there are no reliable domestic LPG submersible pumps; all of them are imported, which makes them expensive, and maintenance as well as the replacement of spare parts will pose difficulties in the future. Is it feasible to use a compressor for pressurization and ground pumps for transportation? First, a compressor is used to draw in gas from another storage tank, thereby increasing the pressure in the gas phase of the current tank; this raises the inlet pressure of the surface pump and reduces the risk of cavitation. But this raises another issue: during the cold winter months, the saturated vapor pressure of LPG is very low. Moreover, since it is stored in underground tanks, there isn’t much gas in the gas phase – will there be enough to supply the compressor? If it’s not enough, does it still require adding a vaporizer and an air storage tank to supply air specifically for the compressor? I’m stuck; I hope experts can give me some advice. Thank you!