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Hydraulic Modeling and Dynamic Open Flow Calibration

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The following is a very useful article on hydraulic modeling of firewater sprinkler systems:

Hydraulic Modeling and Dynamic Open Flow Calibration

By Phil Smith, Project Manager and Chen-Hsiang Su, PE, Senior Consultant, Glenview, IL, Aon Fire Protection Engineering

The first paragraph shown below summarizes the article which can be accessed from the following link: http://newsletter.aonfpe.com/2012/Volume-2/fire-protection.aspx

A hydraulic model is a computer program configured to simulate flows for a hydraulic system. The system could be a sprinkler system, a firewater distribution system, or oil pipeline, etc. for either an existing network or one in development. The primary purpose for constructing and calibrating a hydraulic model is to create a tool that will provide a realistic representation of the hydraulic performance of the firewater system under study. A hydraulic model is a computer program that applies Hazen-Williams equations to simulate flow and pressure loss given a flow input such as a pump curve and an output demand. With a program such as KY Pipe and a reasonably accurate firewater map, the model can be easily created. However, the model needs crucial information about the pipe C-factors (Roughness Coefficient) for it to produce meaningful results.

Don J. Wood


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