Mobatec Modeller

Mobatec Modeller

Mobatec Modeller is a software tool that allows model builders to construct dynamic
(and steady-state) process models of any size – from single units to entire processing plants (sometimes resulting in more than 50.000 equations) in an amazingly short period of time. Mobatec Modeller is clear and easy to use – even beginners can quickly setup rather
complex models that are transparent for others without much documentation.

Dynamic process models created in Mobatec Modeller can be used for designing processes systems, real-time testing of different scenarios, creating start-up and shut-down strategies for processes and equipment, as well as for operators’ trainings.

Mobatec Modeller (MM) offers a great combination of two common approaches used in most modeling software, though separately. The first approach is applied in process simulators, such as Aspen Plus, ProSim, ChemCad and others, and it is based on predefined device models and the creation of flowsheets, through a user interface. The disadvantage of this approach is that users do not have control over the model equations, and can only use them as a ready-made “black box”. The second approach is based on writing a code with equations and numerical methods that can be applied in all high-level programming languages or packages, such as C++, Fortran, Matlab. This approach is often very complex and requires a solid knowledge of programming and numerical methods. Mobatec Modeller includes both approaches, allowing the users to easily create complex flowsheets, while at the same time enjoying full control of equation models. This provides great flexibility in defining specific models, and at the same time users do not have to worry about numerical methods and potential small syntax errors (which often occur, and are difficult to locate in large models), because MM software takes care of it.

The essence of this approach is defined and implemented using special modeling methodology, developed by Mobatec,
as described below.

Why Mobatec Modeller?

Incredibly quick creation of large and complex models
Easy to learn, clear and simple structural modelling method
Connection to DCS interface

Mobatec methodology

The modelling methodology used in Mobatec Modeller is based on hierarchical decomposition of processes (in which the exchange of material and energy plays a predominant role during normal operation) into networks of elementary systems and physical connections. This methodology consists of the following steps.

Mobatec methodology for dynamic process modelling

Step 1: Physical Topology

Break the process down into elementary systems that exchange extensive quantities through physical connections. The resulting network represents physical topology. The process of breaking a plant down to basic systems and connections determines to a great extent the level of detail included in the model. It is consequently also one of the main factors for determining the accuracy of the description the model provides.

Step 2: Species Topology

Describe the distribution of all chemical and/or biological species involved, as well as all the reactions in the various parts of the process. This represents the species topology, which is superimposed on the physical topology and defines which species and what reactions are present in each part of the physical topology. The distribution of species throughout physical topology is fully automated by Mobatec Modeller and is initiated by introducing species at the battery limits of the modelled process.

Chemical process dynamic simulation Mobatec
Mobatec Modeller flowsheet dynamic process simulator

Step 3: Equation Topology

For each elementary system and each fundamental extensive quantity (component mass and energy) that characterizes the system, MM derives the corresponding balance equation. Mobatec Modeller automatically generates all the required balance equations for component mass and enthalpy of each system, since these balances can be trivially formed from the model designer’s definition of the physical and species topology of the process. The user cannot edit the
generated balance equations!

After that, user adds algebraic equations (the so-called Constitutive Relations) to the model, such as transfer laws, kinetic rate expression, geometric relations, state variable transformations, etc. The dynamic balance equations and the algebraic equations, which are placed on top of the physical topology and species topology, represent the equation topology.

Step 4: Control Scheme

User may add process control units, such as transmitters, adjusters and controllers.

Mobatec and Eonplus dynamic model flowsheet

Step 5: Dynamic Simulation Run

Finally, a simulation is run and user may interact with the model,
plot any variable, export data, etc.

DCS and OTS Mobatec simulations Eonplus

Mobatec Modeller
Mobatec Modeller is a software tool that allows model builders to construct dynamic (and steady-state) process models of any size – from single units to entire processing plants (sometimes resulting in more than 50.000 equations) in an amazingly short period of time. Mobatec Modeller is clear and easy to use – even beginners can quickly setup rather complex models that are transparent for others without much documentation.
Dynamic process models created in Mobatec Modeller can be used for designing processes systems, real-time testing of different scenarios, creating start-up and shut-down strategies for processes and equipment, as well as for operators’ trainings.

Why Mobatec Modeller?

Incredibly quick creation of large and complex models

Easy to learn, clear and simple structural modelling method

Connection to DCS interface

Mobatec Methodology
The modelling methodology used in Mobatec Modeller is based on hierarchical decomposition of processes (in which the exchange of material and energy plays a predominant role during normal operation) into networks of elementary systems and physical connections. This methodology consists of the following steps.
Step 1: Physical Topology
Break the process down into elementary systems that exchange extensive quantities through physical connections. The resulting network represents physical topology. The process of breaking a plant down to basic systems and connections determines to a great extent the level of detail included in the model. It is consequently also one of the main factors for determining the accuracy of the description the model provides.
Step 2: Species Topology
Describe the distribution of all chemical and/or biological species involved, as well as all the reactions in the various parts of the process. This represents the species topology, which is superimposed on the physical topology and defines which species and what reactions are present in each part of the physical topology. The distribution of species throughout physical topology is fully automated by Mobatec Modeller and is initiated by introducing species at the battery limits of the modelled process.
Step 3: Equation Topology
For each elementary system and each fundamental extensive quantity (component mass and energy) that characterizes the system, MM derives the corresponding balance equation. Mobatec Modeller automatically generates all the required balance equations for component mass and enthalpy of each system, since these balances can be trivially formed from the model designer’s definition of the physical and species topology of the process. The user cannot edit the generated balance equations!
After that, user adds algebraic equations (the so-called Constitutive Relations) to the model, such as transfer laws, kinetic rate expression, geometric relations, state variable transformations, etc. The dynamic balance equations and the algebraic equations, which are placed on top of the physical topology and species topology, represent the equation topology.
Step 4: Control Scheme
User may add process control units, such as transmitters, adjusters and controllers.
Step 5: Dynamic Simulation Run
Finally, a simulation is run and user may interact with the model, plot any variable, export data, etc.
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