modelExplicitFridge
Model of a hysteresis controlled fridge as explicit declaration
Extends from TransiEnt.Basics.Icons.Model (Icon for models).
Information
1. Purpose of model
Model of a hysteresis controlled fridge as explicit declaration.
2. Level of detail, physical effects considered, and physical insight
(no remarks)
3. Limits of validity
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4. Interfaces
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5. Nomenclature
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6. Governing Equations
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7. Remarks for Usage
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8. Validation
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9. References
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10. Version History
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | a | 50 | Gain of the histeresis function |
| Real | b | 20 | Slope of the saturation function at the origin |
| Base.ExplicitFridgeParameters | params | ||
| SI.TemperatureDifference | Delta_T_internal | 5 | |
| SI.Efficiency | eta | params.COP/((273.15 + 20)/(20 + 12)) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Temperature | T_amb | ||
| SI.Temperature | T | Temperature / Energy level | |
| Real | x | State of on/off controller | |
| Real | y | On/Off control status (boolean) | |
| SI.Power | P_el | params.P_el_n*y | |
| Real | COP_Carnot | (T_amb + Delta_T_internal)/max(2*Delta_T_internal, 2*Delta_T_internal + T_amb - params.Tset) | |
| Real | COP_eff | max(COP_Carnot*eta, 0) | |
| Real | SOC | 1 - (T - (params.Tset - params.DTdb/2))./params.DTdb | |
| SI.Energy | E_stor_total | params.m*params.cp*params.DTdb | |
| SI.Time | t_pos_max | E_stor_total*SOC/(params.k*(T_amb - T)) | |
| SI.Time | t_neg_max | E_stor_total*(1 - SOC)/(params.P_el_n*COP_eff) |