Desktop software and web- and mobile device-based applications have become essential tools for pump system flow modeling, pump selection, pump system analysis and troubleshooting.
The Hydraulic Institute Pump Software Resource Center serves as a single source for pump end-users to discover and explore new software and applications. The free software tools provided here were developed for use as educational modeling tools for the Hydraulic Institute and Pump Systems Matter. HI provides resources and material for the general and educational use of its members and the industry.
Those who rely on this material do so at their own risk. HI makes no representation or warranty as to the suitability of the information provided or the validity of any conclusions drawn, or decisions made, on the basis of this material.
Decisions based upon this material are the exclusive responsibility of the user. HI assumes no responsibility for any direct,indirect, special, incidental or consequential damages arising from reliance on this material. When looking to optimize pumping system operations, a prescreening tool will assist in identifying pumping issues as part of a comprehensive assessment. This prescreening tool helps identify the highest priority pump improvement opportunities and supports a broad or narrow audit search for improving overall pump efficiency.
It also supports engineers in gathering specific data from the field in assessing pump symptoms associated with inefficient energy consumption, high maintenance costs, and other problems and failures.
Based on findings, engineers can identify and prioritize pumps for improvement. Optimizing pump systems offers the greatest opportunity in saving energy and improving overall reliability. PSIM 2 is a free educational tool that allows engineers to build models of pump systems and simulate hydraulic behavior. PSIM 2 will model pump system behavior and demonstrate the impact of operational and design tradeoffs on system performance and energy usage for centrifugal and positive displacement pumping systems.
Current version: 2. The free tool is designed for industrial energy coordinators, plant managers, engineers, and personnel who are interested in improving system efficiency and measuring potential savings opportunities in both dollars and energy savings.
The piping system is the medium that forms the finite element analogy. In CADRE Flow, the elements are considered as pipes and the nodes are connecting points for the pipes or just intermediate points within pipes where information such as pressure, velocity, flow, etc. The solution is conducted on a specific defined piping system which may be part of a larger system as long as the information at the defined boundaries are sufficient to solve the model.
The system may contain different properties of temperature, viscosity, and vapor pressure for the fluid in different parts of the system allowing one to investigate the effects of hotter or colder fluids after a heat exchanger. The basic finite element used in CADRE Flow to construct flow networks are based on a simple straight section of pipe with a constant diameter.
Although the element is based on a simple pipe segment, it can also be a container for specified flow properties i. The pipe element can be assigned a device such as a pump input with a flow rate or a turbine output with an energy loss. The pipe element can also be designated as a tank element which is can represent a reservoir or a flow through filter tank with the inlet at the top and outlet at the bottom.
Element properties that are typically assigned to the pipe are length, diameter, roughness, and discrete loss factors. In establishing pipe friction, the full range of Reynolds number are considered from laminar, through transition, to turbulent so that a proper friction factor for each element is automatically provided irrespective of the flow velocity in the element.
Shown below is a Schematic 2D model using the tank element, a pump, connection pipes, and a one-way pipes to represent a series of 2 biofilter tanks for water treatment. The a one-way check valve pipe used as an overflow return system in order to limit the flow through the biofilter system to precisely the value desired as determined by the hydraulic conductivity of the filter aggregate.
In this model, when the pump rate exceeds 2. When the pump rate is below 2. The models can be considered schematic with assigned lengths for elements or geometric with element lengths determined by the coordinates of the system drawing or a combination of both.
Likewise, the elevation of nodes for gravity effects can be schematic with assigned elevations or simply use elevations determined by the coordinates of the system drawing. The models can be full 3D representing a complete piping system for a 3D structure like the multi-story piping diagram below or simple 2D schematics of a flow system. Develop pump requirements and pipe sizes for typical single line pumping situations, accounting for losses from friction, reentrants, and pipe fittings.
The system at the left could be a zonal system for a small town. Plot hydraulic grade lines, energy lines, distributions of pressure head, velocity, flow rate, etc. Vary the fluid temperature, viscosity, and vapor pressure within the system to account for heating and cooling elements.
One of the many detailed tutorial exercises provided in the Help tutorial illustrating complete construction, setup, solution and commentary. The output can be displayed in tables or directly on a schematic of the model. The numeric format, font, and color of the data, as well as the type of data, can be displayed on the model. Below is a 5 outlet flow system. This is a typical display of the full system solved with line flow and nodal total pressure displayed.
Limits result from the allocation of memory by your computer and operating system. The context sensitive help system provides an overview of the flow analysis methods, help for using CADRE Flow and help in getting started with 11 step-by-step practice exercises. An extensive User Manual is also provided in an electronic searchable format but also formatted in convenient American and European paper sizes for printing.
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