HVAC Model with Digital Pulse – Multibody, Multi-Domain Physical Model in MapleSim – Maplesoft

HVAC Model with Digital Pulse

Demonstrates the cooling of a room by a nonlinear valve which regulates ambient air flow.  Varying heat flow is prescribed to the room to model heat loss due to door opening and closing as well as the fluctuating heat capacity (people, computers etc.). Because the supply air temperature in this system is assumed constant, the air flow rate must vary to meet the rising and falling heat gains or losses within the room. A temperature sensor is used and fed into a PID controller. A digital pulse is then generated to drive the variable air volume box which is basically the nonlinear VAV damper.


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Model Images
  • HVACDigitalPulse Subsystems are used to manage complexity in a model and maintain organization.
  • model Model diagram showing the controller, VAV box, and room subsystems
  • Subsystem Subsystem view of the room model
  • plot The simulation result shows the temperature of the room as well as the volumetric flow rate of air out of the VAV box.