modelMachinesAreaSpecific
Heat flow due to machines relative to room area and specific power
Extends from BaseClasses.PartialInternalGain (Partial model to build a heat source with convective and radiative component).
Information
Overview
Heat source with convective and radiative component. The load is determined by multiplying a schedule (input 0..1) and a specific thermal power and the room's area.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | ratioConv (from PartialInternalGain) | 0.6 | Ratio convective to total heat release |
| Modelica.Units.SI.Emissivity | emissivity (from PartialInternalGain) | 0.95 | Emissivity of radiative heat source surface |
| Modelica.Units.SI.HeatFlux | intGainsMachinesRoomAreaSpecific | 1.0 | Heat flow from machines per square meter room |
| Modelica.Units.SI.Area | areaSurfaceMachinesTotal | max(1e-4, surfaceMachine*intGainsMachinesRoomAreaSpecific*(1/HeatPerMachine)*roomArea) | Total surface area of all machines (radiative heat source) (for a room in a single-family hous e.g. 2 m2) |
| Modelica.Units.SI.Area | roomArea | Area of room |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | uRel (from PartialInternalGain) | Relative input related to max. value (might be a ratio related to number of people [-] or room area and specific heat flow [W/m2] or maximal heat flow [W] | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | convHeat (from PartialInternalGain) | Convective heat flow connector | |
| AixLib.Utilities.Interfaces.RadPort | radHeat (from PartialInternalGain) | Radiative heat flow connector |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow | convectiveHeat (from PartialInternalGain) | ||
| Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow | radiativeHeat (from PartialInternalGain) | ||
| AixLib.Utilities.HeatTransfer.HeatToRad | radConvertor (from PartialInternalGain) | Adaptor for approximative longwave radiation exchange with surface area | |
| Modelica.Blocks.Math.Gain | gain (from PartialInternalGain) | ||
| Modelica.Blocks.Math.Gain | gainSurfaces (from PartialInternalGain) | ||
| Modelica.Blocks.Nonlinear.Limiter | limiter (from PartialInternalGain) |
Revisions
-
March 30, 2020 by Philipp Mehrfeld:
#886: Summarize models to partial model. Make all models dependant from a relative input 0..1. Many refactorings. -
March 01, 2019 by Niklas Huelsenbeck:
Duplicated Machines_DIN18599 Class and adapted it to a heat flux input value instead of a total number of machines -
October 19, 2016 by Ana Constantin:
Corrected documentation to refer to machines directly -
October 21, 2014 by Ana Constantin:
Added a lower positive limit to the surface area, so it will not lead to a division by zero -
Mai 19, 2014 by Ana Constantin:
Uses components from MSL and respects the naming conventions -
May 07, 2013 by Ole Odendahl:
Added documentation and formatted appropriately