Hydraulic check method for reverse return pipe network

Abstract

The invention relates to a hydraulic check method for a reverse return pipe network. The method comprises: determining a resistance property coefficient of each of water supply and return main pipe and branch pipes of the reverse return pipe network, determining a flow ratio coefficient of each branch pipe of the reverse return pipe network, calculating the flow of each of the water supply and return main pipe and branch pipes of the reverse return pipe network with a hydraulic recursive algorithm for the reverse return pipe network, and calculating an accurate value of the flow of the pipe network in combination with an iterative theory. According to the method, hydraulic check of the reverse return pipe network is simpler, more convenient and more accurate, and hydraulic check requirements of the reverse return pipe network are met.

Description

technical field [0001] The invention belongs to the technical field of hydraulic calculation of a fluid pipe network, and in particular relates to a hydraulic checking method of a pipe network of the same course. Background technique [0002] As a basic means of fluid transmission and distribution network design, hydraulic calculation runs through the entire process of the HVAC field, and is valued by design, construction, testing and appraisal agencies, and a lot of research work has been carried out to explore and optimize hydraulic calculation methods. [0003] At this stage, the most important methods used in hydraulic calculations at home and abroad include the assumed flow velocity method, the pressure loss average method, the static pressure recovery method, the economic flow velocity method, and the economic specific friction method. Among them, the economic specific friction method is widely used in HVAC water systems The applied hydraulic calculation method has bee...

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Problems solved by technology

Although the above methods can solve the calibration calculation problem of the fluid pipe network, there are still many problems that limit their wide application in the field of HVAC

[0005] (1) The verification calculation method is complicated and the process is cumbersome

Adjustment calculation methods often need to solve complex linear or nonlinear matrices, and problems such as oscillation and divergence are prone to occur during the calculation process, and the calculation method is cumbersome, which is not conducive to engineering applications

[0006] (2) Most of the HVAC pipe network is a non-circular pipe network with one supply and one return, with simple form and clear structure, and the adjustment calculation methods are mostly applied to complex pipe networks and ring pipe networks, resulting in The application of the above method in the field of HVAC is hindered

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