modelBypassDampers

Test model for the sensible heat recovery wheel with bypass dampers

Extends from Modelica.Icons.Example (Icon for runnable examples).

Information

Example for using the block Buildings.Fluid.HeatExchangers.ThermalWheels.Sensible.BypassDampers.

The input signals are configured as follows:

  • The operating signal opeSig changes from false to true at 72 seconds.
  • The supply air temperature TSup changes from 273.15 + 30 K to 273.15 + 40 K during the period from 60 seconds to 120 seconds. The exhaust air temperature remains constant.
  • The bypass damper position uBypDamPos changes from 0 to 0.2 during the period from 200 seconds to 360 seconds.
  • The supply air flow rate and the exhaust air flow rate are constant.

The expected outputs are:

  • The sensible heat exchanger effectiveness eps is 0 at the beginning. They become positive at 72 seconds and keep constant until 200 seconds. After the 200 seconds, it decreases.
  • Before 72 seconds, the temperature of the leaving supply air is equal to TSup. Likewise, the temperature of the leaving exhaust air is equal to that of the entering exhaust air temperature. The temperatures of the leaving supply air and the leaving exhaust air follow the change of TSup during the period from 72 seconds to 200 seconds. After 200 seconds, the leaving supply air temperature increases and the leaving exhaust air temperature decreases.

Parameters

TypeNameDefaultDescription
Buildings.Fluid.HeatExchangers.ThermalWheels.Data.GenericperPerformance record for the sensible heat wheel

Components

TypeNameDefaultDescription
Buildings.Fluid.Sources.Boundary_pTsin_2Exhaust air sink
Buildings.Fluid.Sources.Boundary_pTsou_2Exhaust air source
Modelica.Blocks.Sources.RampTSupSupply air temperature
Buildings.Fluid.Sources.Boundary_pTsin_1Supply air sink
Buildings.Fluid.Sources.Boundary_pTsou_1Supply air source
Buildings.Fluid.HeatExchangers.ThermalWheels.Sensible.BypassDamperswheWheel
Modelica.Blocks.Sources.RampbypDamPosBypass damper position
Buildings.Controls.OBC.CDL.Logical.Sources.PulseopeSigOperating signal
Buildings.Fluid.Sensors.TemperatureTwoPortsenExhTemTemperature of the exhaust air
Buildings.Fluid.Sensors.TemperatureTwoPortsenSupTemTemperature of the supply air

Contents

NameDescription
MediumAir

Revisions

  • January 8, 2024, by Sen Huang:
    First implementation.