Main pipe simulation method and system in ship nuclear power pipe network simulation

Abstract

The invention discloses a mother pipe simulation method and a mother pipe simulation system applied to ship nuclear power plant simulation, which are applied to the technical field of mother pipe simulation, and specifically, according to the characteristics of a simulation object system, an actual process system is converted into a pipe network model simulation graph, and according to the actual structure of a simulation object, a simulation result is obtained. Selecting the boundary of the pipe network system and the external system and the boundary of the pipe network system and the mother pipe model; according to the drawing of the simulation graph, the pressure data and the flow data of the pipe network boundary are interacted with the mutual interference control body model; according to the state of the mother pipe isolation valve, the decoupling and coupling states of the mutual interference control body are determined; and calculating thermodynamic parameters of the mother pipe by using the transmitted boundary data, and feeding back a thermodynamic parameter calculation result to the pipe network model. According to the invention, the uniform distribution characteristics of pressure and temperature (enthalpy value) in the mother pipe can be simulated under the communication state of the mother pipe; under the condition that the mother pipe is isolated, the characteristic that the pressure and temperature (enthalpy value) on the two sides of the mother pipe isolating valve are relatively independent can be simulated.

Description

technical field [0001] The invention relates to the technical field of parent pipe simulation, and more specifically relates to a method and system for simulating a main pipe used in ship nuclear power pipe network simulation. Background technique [0002] Ship nuclear power plant is different from land nuclear power plant, its left and right sides usually run asymmetrically, or run on one side separately. In the water supply system, the condensed water from both sides is boosted by the feed water pump, collected in the main pipe for distribution, and then sent to the steam generators on both sides. Steam systems also have similar headers. The inner diameter of the main pipe is large, the volume inertia is strong, and the isolation valve is set in the middle, which shows the uniform pressure and temperature characteristics in the state of communication and asymmetrical operation on the port and starboard sides. When the traditional pipe network model is used for simulation...

AI Technical Summary

Problems solved by technology

However, there is a huge difference between land-based installations and ship power installations, with few changes in working conditions and no asymmetric operation; no matter which of the traditional modeling methods is used to model the process system containing the main pipe, it will be difficult to Simulate all operating conditions, and cannot make comprehensive and accurate predictions for design conditions

In the current modeling method, the control body cannot be dynamically split or merged, which makes the parent pipe simulation very difficult

Although the parent pipe model calculated by the CFD method is accurate and reliable, the calculation time is huge, and it cannot be quickly connected and coupled with the one-dimensional pipe network model of real-time simulation, nor can it complete the task of real-time simulation

In this case, the reproducibility of the model is still insufficient, let alone the accurate prediction ability, which can only be applied to limited training simulations, and the simulation results in the design and evaluation stages lack credibility and convincing

Images