By Ashok Kumar Verma
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Additional resources for Process modeling and simulation in chemical, biochemical and environmental engineering
At present, various methods are available to solve not only ordinary but also partial differential equations coupled with algebraic equations. ) are available. These software should be treated as tools only and are helpful for developing technology for process industries. 17 18 Process Modelling and Simulation The modeller can now focus on the representation of a process in mathematical equations. The problem of solving these equations involves expressing them using the syntax and semantics of the chosen software.
Static models are also used to explain the internal construction of equipment. 3. 3 Static model of a boiler. Introduction to Modelling and Simulation 13 The internal construction of a boiler cannot be seen until the boiler is dismantled, but this is time consuming and costly. The use of a small-scale static model with a sectional cut at the desired location is a better option. One can observe the external as well as internal arrangement of various parts of the boiler. It is an interesting and time-saving way of understanding the construction of any equipment.
The requirement is to determine the output temperature of the process fluid or the flow rate of the cooling–heating liquid. The other type of problem is called a ‘design problem’. The outputs of the system are the desired values, and one must determine the input variables which provide the desired output. This class of problem can be solved by inverting the model equations (Charpentier 2010). The solution methodology consists of treating the problem as an ‘optimisation problem’. In the case of design of a heat exchanger, geometrical parameters – such as tube length, tube diameter, number of tubes, shell diameter, baffle spacing and flow rate of the cooling–heating fluid – are to be determined if the flow rate and input and output temperatures of the process fluid are known.
Process modeling and simulation in chemical, biochemical and environmental engineering by Ashok Kumar Verma