.AixLib.Obsolete.Year2021.Fluid.Actuators.Valves.MixingValve

Information

Overview

This model is a model of a three-way mixing-valve. It mixes two incoming fluid-streams into one resulting fluid-stream. It is based on two seperate SimpleValve from the AixLib Library. The Model features a RealInput which controls the mixture of the streams in a range between 0 and 1. A filtered option is available.

Assumptions

The model assumes that pressure loss and friction phenomena of a mixing-valve correspond to the phenomena of a normal valve. The mixing of both streams is assumed ideal.

Concept

The MixingValve is put together from two single SimpleValves. It is controlled by a RealInput in the range between 0 and 1. Value 0 opens port_1 completely and closes port_3, value 1 closes port_1 completely and opens port_3. The function between those values is linear. The model features a filter which simulates the delay when opening a valve manually. For this see PartialValve.

References

The following sheets can be used for finding apropriate values for Kv:

http://www.armstronginternational.com/files/products/lynnwood/pdf/installation/IOM-442_CPAC0012.pdf
http://www.herzvalves.com/www/downloads/DS_4037_Three_Way_Valve.pdf

Example Results

Verification:

MixingValves.AixLib.Examples.MixingValveForwardDirection
MixingValves.AixLib.Examples.MixingValveBackwardDirection

• November 26, 2014  by Roozbeh Sangi:
  Implemented

Contents

Name	Description
MinLimiter	Limit the signal above a threshold