Optimization of External Flow Field Structure of Gas-liquid Separator in Geothermal System Heat Pipe
In the process of exploiting geothermal energy using a super-long gravity heat pipe,the descending condensate and ascending hot vapor in the heat pipe are prone to collide with each other and cause liquid carryover.This issue can be effectively prevented by adding a gas-liquid separator in the adiabatic section.The characteristics of the gas-liquid separation structure(gas-liquid separator)in the new heat pipe-type geothermal system were introduced,the finite element model of the gas-liquid separator was established and its external flow field was simulated by using computational fluid dynamics method.Optimization analysis was carried out by setting a spiral deflector in the external cavity of the separator and adjusting the height and eccentricity of the inlet tube of the gas-liquid separator,as well as the number and pitch of screws of the spiral deflector plate.After setting the spiral deflector,the liquid flow at the outlet of the separator is more stable,the distance between the condensate inlet and the outlet of the gas-liquid separator is proportional to the pressure drop,and the eccentricity of the inlet tube is inversely proportional to the shear force on the inner wall of the inner tube.The uniformity and stability of the liquid at the outlet of the separator are optimal when the number of screws of the spiral deflector is 5 and the pitch is 200 mm.
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万方数据
维普
