temperature control system using peltier modules

I am fairly new to simulink but i have had some little experience and for a final year project i need to design a temperature control system using simulink. This design should be able to do the following

• Accept inputs from a user(prefered temperature)
• peltier module should either heat or cool depending on desired temperature
• a fan should help in the circulation of the hot or cold air from the surface of the peltier modul

my progress so far is that i have figured out how the fan is connected and how the peltier is also connected but i do not know how to integrate the two systems to function as have described in a controlled chamber

Answer 1

[Prasanna]

Hi Adam,

It looks like you want to know more about how to design a temperature control system using Peltier modules. To build and integrate the Simulink model, you can refer to the following steps:

• Model the components of a Peltier module and a Fan. To model a Peltier module, you can create a subsystem that models the heating and cooling behaviour. You can use a transfer function or a state-space model to represent the thermal dynamics.
• You can then use a “constant’/’Slider Gain” block to allow user to set the desired temperature.
• Simulation of a temperature sensor can then be done using a “Gain” block that converts the actual temperature to a sensor reading.
• To implement the control logic, you can use a Stateflow chart to compare the actual and desired temperature. Then based on the comparison, you can turn the Peltier module on/off and active the fan to circulate air.
• For integration, you can combine all the subsystems into a single model using ‘Mux’ block to combine signals and ‘Demux’ blocks to split them as needed.

For more resources regarding building control systems, you can refer the following documentations:

• Temperature control system - https://www.mathworks.com/help/simulink/ug/temperature-control-system-communicating-with-messages.html
• House heating system - https://www.mathworks.com/help/simulink/ug/model-a-house-heating-system.html
• Automatic climate control systems - https://www.mathworks.com/help/simulink/slref/simulating-automatic-climate-control-systems.html

Hope this helps!