modelHexElementLatent
Extends from Buildings.Fluid.HeatExchangers.BaseClasses.PartialHexElement.
Information
Element of a heat exchanger with humidity condensation of fluid 2 and with dynamics of the fluids and the solid.
See
Buildings.Fluid.HeatExchangers.BaseClasses.PartialHexElement
for a description of the physics of the sensible heat exchange.
For the latent heat exchange, this model removes water vapor from the air stream, as
computed by the instance masExc, and deposits it on the coil.
Hence, the latent heat is treated such that it transfers to the coil surface.
The latent heat is removed from the air stream using heat flow source heaConVapAir
and deposited on the coil surface using heat flow source heaConVapCoi.
Note that the driving potential for latent heat transfer is the temperature of the instance mas.
This is an approximation as it neglects the thermal resistance of the water film that builds up on the coil.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | simplify_mWat_flow | true | Set to true to cause port_a.m_flow + port_b.m_flow = 0 even if mWat_flow is non-zero. Used only if Medium.nX > 1 |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| MassExchange | masExc | Model for mass exchange | |
| Modelica.Blocks.Math.Gain | gain | Change sign |
Revisions
-
July 5, 2022, by Antoine Gautier:
Restored the addition of heat tomas.T.
This is for #3065. -
May 26, 2022, by Michael Wetter:
Removed addition of heat tomas.T.
This is for #3027. -
March 11, 2021, by Michael Wetter:
Changed constantsimplify_mWat_flowfrom protected to public because it is assigned by Buildings.Fluid.HeatExchangers.WetCoilCounterFlow.
This is for #2387. -
May 1, 2020, by Michael Wetter:
Added constantsimplify_mWat_flow.
This is for #1920. -
April 14, 2017, by David Blum:
Added heat of condensation to coil surface heat balance and removed it from the air stream.
This is for issue Buildings #711. -
April 12, 2017, by Michael Wetter:
Removed temperature that is no longer needed.
This is for issue Buildings #704. -
June 18, 2014, by Michael Wetter:
Added initialization formasto avoid a warning during translation. -
September 11, 2013, by Michael Latentter:
First implementation.