How to simulate thermal cycles from 5°C to 40°C in an HVAC zone in OpenStudio?

asked 2025-08-17 12:08:02 -0500

davillamariano's avatar

updated 2025-08-18 10:21:56 -0500

I want to simulate an HVAC system in OpenStudio for a thermal simulation room in the laboratory where I work. The idea is for the system to follow this 3-hour cycle:

  • At time t = 0 min, the room temperature is 20°C
  • From t = 0 min to t = 45 min, the temperature drops to 5°C
  • From t = 45 min to t = 90 min, the temperature rises to 40°C
  • From t = 90 min to t = 135 min, the temperature drops to 5°C
  • From t = 135 min to t = 180 min, the temperature rises to 40°C

I am using a Packaged Rooftop VAV with Reheat system and have already configured the heating and cooling thermostats as shown in the images, but the zone temperature profile does not match what I want. What could I do to achieve these temperature oscillations within the thermal zone?

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Comments

Belated comment.

  • "as shown in the images" - images?
  • "zone temperature profile does not match what I want" - in what way? lag between scheduled heating/cooling setpoint temperatures (input) vs simulated outcomes (output)? insufficient heating/cooling capacity (kW)?
Denis Bourgeois's avatar Denis Bourgeois  ( 2026-03-27 14:15:24 -0500 )edit