recordBaseCHPSpecification
Record used for specification of a CHP
Extends from TransiEnt.Basics.Icons.Record (Icon for records).
Information
1. Purpose of model
Partial record for CHP specification data.
2. Level of detail, physical effects considered, and physical insight
(no remarks)
3. Limits of validity
(no remarks)
4. Interfaces
(no remarks)
5. Nomenclature
(no remarks)
6. Governing Equations
(no remarks)
7. Remarks for Usage
(no remarks)
8. Validation
(no validation or testing necessary)
9. References
(no remarks)
10. Version History
Created by Arne Koeppen (arne.koeppen@tuhh.de), Jun 2013
Revised by Lisa Andresen (andresen@tuhh.de), Aug 2013
Revised by Anne Senkel (anne.senkel@tuhh.de), Feb 2019
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| General › Efficiencies | |||
| TransiEnt.Producer.Combined.SmallScaleCHP.Base.PartloadEfficiency.PartloadEfficiencyCharacteristic | EfficiencyCharLine | TransiEnt.Producer.Combined.SmallScaleCHP.Base.PartloadEfficiency.PartloadEfficiencyCharacteristic(CL_eta_th = [P_el_min/P_el_max, eta_h_max/eta_h_max; 1.00, eta_h_min/eta_h_max], CL_eta_el = [P_el_min/P_el_max, eta_el_min/eta_el_max; 1.00, eta_el_max/eta_el_max]) | choose characteristic relative efficiency line |
| Real | eta_el_max | 0.30 | Maximum electrical efficiency |
| Real | eta_el_min | eta_el_max*0.85 | Electrical efficiency at P_el_min |
| Real | eta_m | 0.9 | guessed value for mechanical efficiency (P_e/P_i=p_me/p_mi) (Hackbarth, Merhof) |
| General › Electrical Parameters | |||
| Modelica.Units.SI.Power | P_el_max | 1e5 | Maximum power output in W |
| Modelica.Units.SI.Power | P_el_min | 0.5*P_el_max | Minimum power output in W |
| Efficiencies | |||
| Real | eta_h_max | 0.98 | Fuel utilization at P_el_min |
| Real | eta_h_min | 0.95*eta_h_max | Fuel utilization at P_el_max |
| Technical Specifications › For informative purposes only | |||
| Modelica.Units.SI.Temperature | T_opt | 338.15 | Temperature of warm engine |
| Real | thermalConductivity | Q_flow_out_max/200 | Thermal conductivity between engines core and casing |
| Modelica.Units.SI.Power | Q_flow_out_max | P_el_max/eta_el_max*(eta_h_max - eta_el_max) | Maximum heat flow in W |
| Modelica.Units.SI.Power | Q_flow_out_min | P_el_min/eta_el_min*(eta_h_min - eta_el_min) | Minimum heat flow in W |
| Modelica.Units.SI.CoefficientOfHeatTransfer | k | 20 | Coefficient of heat transfer |
| Modelica.Units.SI.Mass | m_engine | 1000 | Approximate mass of motor |
| Modelica.Units.SI.Length | length | 1.5 | Size of motor block |
| Modelica.Units.SI.Height | height | 1 | Size of motor block |
| Modelica.Units.SI.Length | width | 1 | Size of motor block |
| Integer | n_cylinder | 4 | Number of cylinders |
| Modelica.Units.SI.Length | pistonStroke | pistonDiameter | Piston stroke of engine |
| Modelica.Units.SI.Diameter | pistonDiameter | 0.1 | Piston diameter of engine |
| Modelica.Units.SI.Volume | engineDisplacement | pistonDiameter^2/4*Modelica.Constants.pi*pistonStroke | Engine displacement of single cylinder |
| Modelica.Units.NonSI.AngularVelocity_rpm | n_n | 1500 | nominal angular velocity in rpm |
| Modelica.Units.SI.AngularVelocity | omega_n | n_n/60*2*Modelica.Constants.pi | Nominal angular velocity |
| General › Thermal Parameters | |||
| Modelica.Units.SI.Temperature | T_return_max | 343.15 | Maximum allowed coolant temperature |
| Real | shareExhaustHeat | 0.3 | Share of exhaust heat flow Q_flow_exhaust on total heat flow fed into the grid Q_flow_out |
| Real | lambda | 1 | Air–fuel ratio |
| General › Dynamic Parameters | |||
| Real | reactionTime | 1/8 | Reaction time of engine |
| Real | damping | 3 | Damping of engine's transfer function |
| Modelica.Units.SI.Time | syncTime | 90 | Time needed for synchronistion to the grid |