Ship Cooling Water Pipe Network System Dynamic Simulation In Silverlight Environment

Because of the continuous improvement of integration and automation of ship systems, ship cooling water pipe network system is becoming more and more complicated. The traditional pipeline hydraulic calculation method is increasingly difficult to meet the hydraulic cooling water pipe network system computing requirements. Through the analysis and research in this type of pipe network system characteristics, in this paper, the calculation method of the existing pipe network is improved and applied to the ship pipe network system.This paper, firstly introduces the background and current situation of pipe net hydraulic calculation, and then tells the various hydraulic characteristics and the mathematical formula for the calculation of pipeline route loss and the local loss to determine the specific mathematical relationship between flow rate and pressure drop. Using graph theory, this paper introduces the basic correlation matrix and basic circuit matrix, spanning tree and residual tree in graph theory. Combined with the analysis of the hydraulic pipe network, the paper puts forward solving methods, by using the solution of loop and node equation, and graph theory method, to get the hydraulic solution of ship network. Solution loop equation method is mainly based on the premise of meeting the flow continuity, adjusting the central flow to satisfy the conservation of energy. Solution node equation is based on the initial formulation node pressure head, adjusting node pressure head gradually to meet the flow balance equation. Graph theory method initial only to the residual tree flow distribution, greatly simplifies the process of calculation in the pipe network. Using the flow continuity equation and loop energy equations, and the application of basic correlation matrix and basic circuit matrix, solves the ship cooling water system. The paper describes Hardy-cross method, quasi Newton method and graph theory method in detail. The establishment of solving the change of hydraulic pipe network makes it more convenient to solve the question in computer, hydraulic parameters can dynamically changes with the dynamic change of pipe network. This paper, by changing the existing basic correlation matrix and basic circuit matrix that reflect the pipe network, dynamically generates a new matrix to reflect the pipe network, and can be used in computer in real time to solve the question. In the Silverlight environment, using XAML language and C#language designs the low temperature fresh water cooling system simulation software, to do real-time dynamic simulation of marine low temperature fresh water cooling system.The calculation method and the establishment of ship network mathematical model in this paper, not only can be used in cooling water system, but also can be applied to the pipe network system of all marine, such as fuel system, lubricating system. Difference from the cooling water system mainly lies in the different water head loss caused by the viscosity coefficient of fluid, through the modification of the viscosity coefficient, it can be applied well to other network systems.