Cold-end system operation point determination method based on curve fitting

The invention discloses a cold-end system operation point determination method based on curve fitting, which comprises the following steps of: dividing a cold-end system into two parts, namely a condenser subsystem and a mechanical tower subsystem, and ignoring the influence of a cooling pipeline and a circulating pump on the temperature of circulating water; considering the inlet and outlet cooling water temperatures of the condenser subsystem to be equal to the outlet and inlet cooling water temperatures of the mechanical tower subsystem respectively; under certain cooling water flow and atmospheric conditions, respectively calculating the heat exchange amounts of the condenser subsystem and the mechanical tower subsystem at different inlet cooling water temperatures by using corresponding calculation models; and drawing operation point coordinate scatter diagrams of the condenser subsystem and the mechanical tower subsystem in the same diagram by taking the circulating water inlet water temperature of the