CFD-based floating nuclear power station thermal discharge water heat diffusion numerical simulation method

Abstract

The invention relates to a CFD-based floating nuclear power station thermal discharge water heat diffusion numerical simulation method. The method comprises the steps of establishing a temperature drainage three-dimensional physical model; respectively expanding a certain calculation range around the ship body as a numerical simulation calculation area; performing three-dimensional grid division on the temperature drainage calculation domain of the floating nuclear power station; selecting a corresponding flow mathematical model in the fluent; selecting corresponding boundary conditions for the circulating cooling water taking and draining opening, the computational domain boundary and the ship wall surface; selecting and calculating a convergence format, determining and calculating an initial value, calculating and obtaining thermal discharge water heat diffusion temperature distribution and speed distribution of the floating nuclear power station, and counting a seawater temperaturedistribution curve in a direction found by the circulating cooling water intake; and integrating and analyzing the calculation by combining corresponding national regulation standards, and if the standard requirements are not met, changing the relative positions of the water taking and draining ports or taking and draining heat flux and recalculating until the calculation result meets the regulation requirements.

Description

technical field [0001] The invention relates to numerical simulation of warm drainage, in particular to a CFD-based numerical simulation method for thermal diffusion of warm drainage of a floating nuclear power plant, and belongs to the technical field of flow heat exchange simulation calculation. Background technique [0002] As an important part of the main steam turbine generator set of the nuclear power plant, the circulating water system uses a circulating water pump to extract seawater from the adjacent sea area as a cooling medium, exchanges heat with the high-temperature steam in the main condenser, and then discharges it to the surrounding sea area. The increase of water temperature will cause heat enrichment, which will also affect the water quality, which will have a huge impact on the ecological environment of the water body. [0003] The floating nuclear power plant is still in the stage of technology research and development. At this stage, there is no experime...

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Problems solved by technology

At the present stage, most of the research on thermal drainage focuses on the experiments and simulation studies of Binhai Nuclear Power Plant as a prototype, and the technology is relatively mature. Since the operating point of offshore floating nuclear power plant is different from that of Binhai Nuclear Power Plant, it is far away from the coast, and the dilution and diffusion process of warm drainage is affected by the first coast Smaller and more affected by ocean currents, so the thermal diffusion law of conventional coastal nuclear power plants is not necessarily applicable to floating nuclear power plants

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