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RTDThe Residence Time Distribution program, RTD®, is intended for investigation of hydrodynamic flows in chemical apparatuses on the basis of the stimulus - response technique This technique includes the injection of a small amount of tagged inert particles (tracer) in the inlet stream with the observation of the corresponding response in the outlet stream. A flow model is then selected by matching the experimental RTD curve with that obtained from the mathematical model. The suitable model is one that matches the experimental data with the smallest error and describes the flow in a reactor with the smallest number of physical parameters.
The program provides the convenient interface and powerful tools for:
Structure: RTD is based on Experts - a proprietary software package that assists the user in the investigation of the structure of hydrodynamic flows in reactors.
Initial Data Processing:
Flow Models: The Model Expert provides the convenient graphical interface for creation and modification of the flow models on the basis of the followings flow patterns:
The flow model is described by its transfer function. Flow models of different complexity may be constructed by combination of several flow patterns. The transfer function of the whole model is generated automatically.
Flow Parameters Estimation: With the Estimation Expert user can estimate the best values for hydrodynamic flow models. Estimation is done in the time domain by the least square method.
The convolution approach is used. In order to do this, the model output signal is calculated as a convolution of the model transfer function (in the time domain) and experimental input signal. It is then compared with the experimental signal.
Parameter values are changed to reduce the lack of fit and the process is repeated automatically, if necessary. The manuals are included in the archive. Note! The latest version of the program RTD 3.14.w7 has been modified to provide full compatibility with MS Windows 7,8 |