recordThermodynamicProperties
record for thermodynamic properties
Extends from TransiEnt.Basics.Icons.Record (Icon for records).
Information
1. Purpose of model
record for thermodynamic properties
2. Level of detail, physical effects considered, and physical insight
(Purely technical component without physical modeling.)
3. Limits of validity
(Purely technical component without physical modeling.)
4.Interfaces
(no remarks)
5. Nomenclature
(no elements)
6. Governing Equations
(no equations)
7. Remarks for Usage
(no remarks)
8. Validation
(no validation or testing necessary)
9. References
(no remarks)
10. Version History
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| General Asumptions | |||
| Real | q_i | 5 | internal heat sources in W/m |
| Real | n_min | 0.7 | minimum needed air change rate |
| Modelica.Units.SI.Density | rho_air | 1.2041 | Density of air 20C and 1bar |
| Modelica.Units.SI.SpecificHeatCapacity | cp_air | 1.005e3 | specific heat capacity of air |
| Heat transfer and storage | |||
| Real | cp_ext | 50*3600 | Heat storage capacity of external walls |
| Real | cp_int | 8*3600 | Heat storage capacity of internal walls |
| Modelica.Units.SI.CoefficientOfHeatTransfer | U_ext | 0.4 | Heat transfer coefficient of external walls |
| Modelica.Units.SI.CoefficientOfHeatTransfer | U_roof | 0.2 | Heat transfer coefficient of roof |
| Modelica.Units.SI.CoefficientOfHeatTransfer | alpha_roomWall | 8 | coefficient of heat transfer from the the air in the room to the walls (typical values 6-8W/mK) for static air |
| Modelica.Units.SI.CoefficientOfHeatTransfer | alpha_wallAmbiance | 15 | coefficient of heat transfer from the wall to the environement |
| Modelica.Units.SI.CoefficientOfHeatTransfer | alpha_groundsurface | 10 | coefficient of heat transfer from the surface of the ground to the room (can be 10W/mK) |