Heat Transfer


Heat Transfer is a library that enables the user to model different types of heat transfer and heat exchangers in a detailed way. The following picture shows possible applications of the Heat Transfer library and the connection between the SimulationX fluid libraries:

Figure 1: Heat Transfer Library as connection between the fluid libraries and possible applications

The Heat Transfer library contains basic functions and elements for heat transfer and complex ready-to-use heat exchangers. Features of the library are:

  • Choose a model best suited to your application
  • Consider complex dynamic effects using discretized volumes
  • Make your simulation real-time capable using the NTU method
  • Transfer heat between any SimulationX fluid domains
  • Each heat exchanger has connectors to the hydraulics, pneumatics and thermal-fluids libraries
  • Use a heat exchanger model straight from the box or creating own custom HX or HX library using the included building blocks (heat transfer and pressure drop correlations, basic elements)

The library consists of the following sub-packages:

Accessories
Basic Elements
Dynamic Heat Exchangers
Steady State Heat Exchangers

Accessories contains all of the functions and basic models, that are used in the heat exchangers and basic elements.

Basic Elements includes models of walls and flow channels, which can either be used as stand-alone elements like a pipe or in complex heat exchangers. Features of the basic elements are:
  • Simple elements such as a pipe or wall
  • Use discretized volumes to consider complex, dynamic effects
  • Conservation of mass, energy and momentum for each volume
  • Pressure drop and heat transfer are calculated for the local conditions
  • Wall capacity and temperature distribution can be studied
  • Valid for one-phase and two-phase regions
  • Contain a variety of physics-based pressure drop and heat transfer correlations

Dynamic Heat Exchangers contains complex heat exchangers models with dynamic behavior. These heat exchangers are used if the dynamics of the heat exchanger (for example capacity of the wall between the fluids) are of interest.

Steady State Heat Exchangers contains ready-to-use heat exchangers of different types using the NTU method. These elements are intended for fast calculations. Features of the steady-state heat exchangers are:

  • Based on the NTU method (RT applications)
  • Sizing mode allows user to optimize heat exchanger geometry based on specified heat power or outlet temperature conditions