This section describes a floor-based radiant cooling system and the inputs required.
|
Hydronic Tubing Length |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The length of the hydronic tubing in the slab |
|
Units |
ft |
|
Input Restrictions |
As designed |
|
Baseline building |
Not applicable |
|
Hydronic Tubing Inside Diameter |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The inside diameter of the hydronic tubing in the slab |
|
Units |
ft |
|
Input Restrictions |
As designed, between a minimum of ½” and a maximum of ¾” |
|
Baseline building |
Not applicable |
|
Temperature Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB |
|
Units |
None |
|
Input Restrictions |
Fixed at Mean Air Temperature for calculations |
|
Baseline building |
Not applicable |
|
Rated Flow Rate |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB |
|
Units |
None |
|
Input Restrictions |
Fixed at Mean Air Temperature for calculations |
|
Baseline building |
Not applicable |
|
Cooling Control Temperature |
|
|
Applicability |
Variable Flow Systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB |
|
Units |
None |
|
Input Restrictions |
Fixed at Mean Air Temperature for calculations |
|
Baseline building |
Not applicable |
|
Condensation Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB |
|
Units |
None |
|
Input Restrictions |
Fixed at Mean Air Temperature for calculations |
|
Baseline building |
Not applicable |
|
Condensation Control Dewpoint Offset |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature difference above dewpoint that is the minimum cold water supply temperature |
|
Units |
None |
|
Input Restrictions |
Fixed at 2°F above dewpoint |
|
Baseline building |
Not applicable |
|
Rated Pump Power Consumption |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The rated pump power at design conditions |
|
Units |
Watts |
|
Input Restrictions |
As Designed |
|
Baseline building |
Not applicable |
|
Motor Efficiency |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The pump motor efficiency |
|
Units |
Decimal fraction |
|
Input Restrictions |
As Designed |
|
Baseline building |
Default motor efficiency from Standard 90.1-2010 Table 10.8 (Table numbering may change) based on motor nameplate hp |
|
Fraction of Motor Heat to Fluid |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
Fraction of the heat from the motor inefficiencies that enters the fluid stream |
|
Units |
none |
|
Input Restrictions |
As designed. Default is 0. |
|
Baseline building |
Not applicable |
|
Cooling High Water Temperature |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The high temperature used for control. If the water temperature is above the high temperature, the control temperature is set to the low control temperature. |
|
Units |
°F |
|
Input Restrictions |
As designed |
|
Baseline building |
Not applicable |
|
Cooling Low Water Temperature |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control of the water temperature. If the water temperature of the radiant cooling is below this temperature, cooling is disabled. |
|
Units |
°F |
|
Input Restrictions |
Fixed at 55°F |
|
Baseline building |
Not applicable |
|
Condensation Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The simulation program may have a means of detecting when condensation is likely to occur on floor surfaces in the space. When this occurs, the simulation can shut off the system to prevent condensation from occurring. |
|
Units |
List: None, Simple, Variable |
|
Input Restrictions |
As designed |
|
Baseline building |
Not applicable |
This section describes a floor-based radiant cooling system and the inputs required for Standard 90.1-2019 evaluation.
|
Hydronic Tubing Length |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The length of the hydronic tubing in the slab |
|
Units |
ft |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |
|
Hydronic Tubing Inside Diameter |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The inside diameter of the hydronic tubing in the slab |
|
Units |
ft |
|
Input Restrictions |
As designed, between a minimum of 1/2 in. and a maximum of 3/4 in. |
|
Baseline Building |
Not applicable |
|
Temperature Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, TODB, TOWB) |
|
Units |
None |
|
Input Restrictions |
Fixed at mean air temperature for calculations |
|
Baseline Building |
Not applicable |
|
Rated Flow Rate |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB) |
|
Units |
None |
|
Input Restrictions |
Fixed at mean air temperature for calculations |
|
Baseline Building |
Not applicable |
|
Cooling Control Temperature |
|
|
Applicability |
Variable flow systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB) |
|
Units |
None |
|
Input Restrictions |
Fixed at mean air temperature for calculations |
|
Baseline Building |
Not applicable |
|
Condensation Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control (operative temperature, mean air temperature, mean radiant temperature, ODB, OWB) |
|
Units |
None |
|
Input Restrictions |
Fixed at mean air temperature for calculations |
|
Baseline Building |
Not applicable |
|
Condensation Control Dewpoint Offset |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature difference above dewpoint that is the minimum cold water supply temperature |
|
Units |
None |
|
Input Restrictions |
Fixed at 2°F above dewpoint |
|
Baseline Building |
Not applicable |
|
Rated Pump Power Consumption |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The rated pump power at design conditions |
|
Units |
Watts |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |
|
Motor Efficiency |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The pump motor efficiency |
|
Units |
Decimal fraction |
|
Input Restrictions |
As designed |
|
Baseline Building |
Default motor efficiency from Standard 90.1-2019, Table G3.9.1 based on motor nameplate hp |
|
Fraction of Motor Heat to Fluid |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
Fraction of the heat from the motor inefficiencies that enters the fluid stream |
|
Units |
None |
|
Input Restrictions |
As designed. Default is 0. |
|
Baseline Building |
Not applicable |
|
Cooling High Water Temperature |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The high temperature used for control. If the water temperature is above the high temperature, the control temperature is set to the low control temperature. |
|
Units |
°F |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |
|
Cooling Low Water Temperature |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The temperature used for control of the water temperature. If the water temperature of the radiant cooling is below this temperature, cooling is disabled. |
|
Units |
°F |
|
Input Restrictions |
Fixed at 55°F |
|
Baseline Building |
Not applicable |
|
Condensation of Control Type |
|
|
Applicability |
Floor-based radiant cooling systems |
|
Definition |
The simulation program may have a means of detecting when condensation is likely to occur on floor surfaces in the space. When this occurs, the simulation can shut off the system to prevent condensation from occurring. |
|
Units |
List: None, Simple, Variable |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |