Baseline Building Summary. None of the baseline building systems use a water-side economizer.
Water-Side Economizer Name | |
Applicability | All water-side economizers |
---|---|
Definition | The name of a water-side economizer for a cooling system |
Units | Text, unique |
Input Restrictions | Descriptive reference to the construction documents. The default is no water-side economizer. |
Baseline Rules | No water economizer |
Water Economizer Type | |
Applicability | All water-side economizers |
---|---|
Definition | The type of water-side economizer. Choices include:
|
Units | List (see above) |
Input Restrictions | As designed |
Baseline Rules | No water economizer |
Water-Side Economizer HX Effectiveness | |||||||||
Applicability | Water-side economizers with an open cooling tower | ||||||||
---|---|---|---|---|---|---|---|---|---|
Definition |
The effectiveness of a water-side heat exchanger at design conditions. This is defined as: (6.8.4-1) $$ W\!SE_{eff} = \frac{t_{ea}-t_{la}}{t_{ea}-t_{ew}}$$where
|
||||||||
Units | Ratio | ||||||||
Input Restrictions | As designed. The default is 60 %. | ||||||||
Baseline Rules | No water economizer |
Water-Side Economizer Maximum Tdb | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (outside air dry-bulb temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 65°F. |
Baseline Rules | No water economizer |
Water-Side Economizer Maximum CWS | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (condenser water supply temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 50°F. |
Baseline Rules | No water economizer |
Water-Side Economizer CWS Setpoint | |
Applicability | All water-side economizers |
---|---|
Definition | The design condenser water supply temperature for the cooling tower in economizer mode. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 45°F or 40°F for “Thermo Cycle.” |
Baseline Rules | No water economizer |
Water-Side Economizer Availability Schedule | |
Applicability | All water-side economizers |
---|---|
Definition | A schedule which represents the availability of the water-side economizer |
Units | Data structure: schedule, on/off |
Input Restrictions | As designed |
Baseline Rules | No water economizer |
Water-Side Economizer Auxiliary kW | |
Applicability | Water-side economizers with an open tower |
---|---|
Definition | The electrical input (pumps and auxiliaries) for a dedicated pump for the chilled water side of the heat exchanger. This power is in excess of the condenser water pumps and cooling tower fans for the system during water-side economizer operation. |
Units | KW or kW/ton |
Input Restrictions | As designed |
Baseline Rules | No water economizer |
Baseline Building Summary. None of the baseline building systems use a water-side economizer. Additional inputs to those below may be required to simulate actual control sequences.
Water-Side Economizer Name |
|
---|---|
Applicability |
All water-side economizers |
Definition |
The name of a water-side economizer for a cooling system |
Units |
Text, unique |
Input Restrictions |
Descriptive reference to the construction documents. The default is no water-side economizer. |
Baseline Rules |
No water economizer |
Water Economizer Type |
|
---|---|
Applicability |
All water-side economizers |
Definition |
The type of water-side economizer. Choices include:
|
Units |
List (see above) |
Input Restrictions |
As designed |
Baseline Rules |
No water economizer |
Water-Side Economizer HX Effectiveness |
|||||||||
---|---|---|---|---|---|---|---|---|---|
Applicability |
Water-side economizers with an open cooling tower |
||||||||
Definition |
The effectiveness of a water-side heat exchanger at design conditions. This is defined as: (Equation 3.8.4-1) $$WSE_{eff} = \frac{t_{ea} - t_{la}} {t_{ea}-t_{ew}} $$ Where
|
||||||||
Units |
Ratio |
||||||||
Input Restrictions |
As designed. The default is 60 %. |
||||||||
Baseline Rules |
No water economizer |
Water-Side Economizer Maximum Tdb |
|
---|---|
Applicability |
All water-side economizers |
Definition |
The control temperature (outside air dry-bulb temperature) above which the water-side economizer is disabled. |
Units |
Degrees Fahrenheit (°F) |
Input Restrictions |
As designed. Defaults to 65 °F. |
Baseline Rules |
No water economizer |
Water-Side Economizer Maximum CWS |
|
---|---|
Applicability |
All water-side economizers |
Definition |
The control temperature (condenser water supply temperature) above which the water-side economizer is disabled. |
Units |
Degrees Fahrenheit (°F) |
Input Restrictions |
As designed. Defaults to 50 °F. |
Baseline Rules |
No water economizer |
Water-Side Economizer CWS Setpoint |
|
---|---|
Applicability |
All water-side economizers |
Definition |
The design condenser water supply temperature for the cooling tower in economizer mode. |
Units |
Degrees Fahrenheit (°F) |
Input Restrictions |
As designed. Defaults to 45°F or 40°F for “Thermo Cycle.” If a strainer cycle is specified, changeover temperature from economizer to mechanical cooling shall be set at 50°F. |
Baseline Rules |
No water economizer |
Water-Side Economizer Availability Schedule |
|
---|---|
Applicability |
All water-side economizers |
Definition |
A schedule which represents the availability of the water-side economizer |
Units |
Data structure: schedule, on/off |
Input Restrictions |
As designed |
Baseline Rules |
No water economizer |
Water-Side Economizer Auxiliary kW |
|
---|---|
Applicability |
Water-side economizers with an open tower |
Definition |
The electrical input (pumps and auxiliaries) for a dedicated pump for the chilled water side of the heat exchanger. This power is in excess of the condenser water pumps and cooling tower fans for the system during water-side economizer operation. |
Units |
KW or kW/ton |
Input Restrictions |
As designed |
Baseline Rules |
No water economizer |
Baseline Building Summary. None of the baseline building systems use a water-side economizer.
Water-Side Economizer Name | |
Applicability | All water-side economizers |
---|---|
Definition | The name of a water-side economizer for a cooling system |
Units | Text, unique |
Input Restrictions | Descriptive reference to the construction documents. The default is no water-side economizer. |
Baseline Rules | No water economizer |
Water Economizer Type | |
Applicability | All water-side economizers |
---|---|
Definition | The type of water-side economizer. Choices include:
|
Units | List (see above) |
Input Restrictions | As designed |
Water-Side Economizer HX Effectiveness | |||||||||
Applicability | Water-side economizers with an open cooling tower | ||||||||
---|---|---|---|---|---|---|---|---|---|
Definition |
The effectiveness of a water-side heat exchanger at design conditions. This is defined as: (6.8.4-1) $$ W\!SE_{eff} = \frac{t_{ea}-t_{la}}{t_{ea}-t_{ew}}$$where
|
||||||||
Units | Ratio | ||||||||
Input Restrictions | As designed. The default is 60 %. |
Water-Side Economizer Maximum Tdb | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (outside air dry-bulb temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 65°F. |
Water-Side Economizer Maximum CWS | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (condenser water supply temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 50°F. |
Water-Side Economizer CWS Setpoint | |
Applicability | All water-side economizers |
---|---|
Definition | The design condenser water supply temperature for the cooling tower in economizer mode. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 45°F or 40°F for “Thermo Cycle.” |
Water-Side Economizer Availability Schedule | |
Applicability | All water-side economizers |
---|---|
Definition | A schedule which represents the availability of the water-side economizer |
Units | Data structure: schedule, on/off |
Input Restrictions | As designed |
Water-Side Economizer Auxiliary kW | |
Applicability | Water-side economizers with an open tower |
---|---|
Definition | The electrical input (pumps and auxiliaries) for a dedicated pump for the chilled water side of the heat exchanger. This power is in excess of the condenser water pumps and cooling tower fans for the system during water-side economizer operation. |
Units | KW or kW/ton |
Input Restrictions | As designed |
Baseline Building Summary. None of the baseline building systems use a water-side economizer.
Water-Side Economizer Name | |
Applicability | All water-side economizers |
---|---|
Definition | The name of a water-side economizer for a cooling system |
Units | Text, unique |
Input Restrictions | Descriptive reference to the construction documents. The default is no water-side economizer. |
Baseline Rules | No water economizer |
Water Economizer Type | |
Applicability | All water-side economizers |
---|---|
Definition | The type of water-side economizer. Choices include:
|
Units | List (see above) |
Input Restrictions | As designed |
Water-Side Economizer HX Effectiveness | |||||||||
Applicability | Water-side economizers with an open cooling tower | ||||||||
---|---|---|---|---|---|---|---|---|---|
Definition |
The effectiveness of a water-side heat exchanger at design conditions. This is defined as: (6.8.4-1) $$ W\!SE_{eff} = \frac{t_{ea}-t_{la}}{t_{ea}-t_{ew}}$$where
|
||||||||
Units | Ratio | ||||||||
Input Restrictions | As designed. The default is 60 %. |
Water-Side Economizer Maximum Tdb | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (outside air dry-bulb temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 65°F. |
Water-Side Economizer Maximum CWS | |
Applicability | All water-side economizers |
---|---|
Definition | The control temperature (condenser water supply temperature) above which the water-side economizer is disabled. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 50°F. |
Water-Side Economizer CWS Setpoint | |
Applicability | All water-side economizers |
---|---|
Definition | The design condenser water supply temperature for the cooling tower in economizer mode. |
Units | Degrees Fahrenheit (°F) |
Input Restrictions | As designed. Defaults to 45°F or 40°F for “Thermo Cycle.” |
Water-Side Economizer Availability Schedule | |
Applicability | All water-side economizers |
---|---|
Definition | A schedule which represents the availability of the water-side economizer |
Units | Data structure: schedule, on/off |
Input Restrictions | As designed |
Water-Side Economizer Auxiliary kW | |
Applicability | Water-side economizers with an open tower |
---|---|
Definition | The electrical input (pumps and auxiliaries) for a dedicated pump for the chilled water side of the heat exchanger. This power is in excess of the condenser water pumps and cooling tower fans for the system during water-side economizer operation. |
Units | KW or kW/ton |
Input Restrictions | As designed |