REFRIGERATION:WALKIN

Works in conjunction with a compressor rack, a refrigeration system, or a refrigeration secondary system to simulate the performance of a walk-in cooler. The walk-in cooler model uses information at rated conditions along with input descriptions for heat transfer surfaces facing multiple zones to determine performance.

Name

Type: alphanumeric

Availability Schedule Name

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Availability schedule name for this system. Schedule value > 0 means the system is available. If this field is blank, the system is always available.

Rated Coil Cooling Capacity

Type: real number
Unit: W

Operating Temperature

Type: real number
Unit: C

Rated Cooling Source Temperature

Type: real number
If DXEvaporator, use evaporating temperature (saturated suction temperature) If BrineCoil, use Brine entering temperature used to set minimum suction pressure for DX systems and minimum brine temp for secondary systems
Unit: C
Minimum: -70.0
Maximum: 40.

Rated Total Heating Power

Type: real number
Include total for all anti-sweat, door, drip-pan, and floor heater power Do not include defrost heater power
Unit: W

Heating Power Schedule Name

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Values will be used to multiply the total heating power Values in the schedule should be between 0.0 and 1.0 For example, this could be used if display door antisweat heaters are turned off at night Defaults to always on if schedule name left blank.

Rated Cooling Coil Fan Power

Type: real number
Unit: W
Minimum: 0.
Default: 375.0

Rated Circulation Fan Power

Type: real number
Unit: W
Minimum: 0.0
Default: 0.0

Rated Total Lighting Power

Type: real number
Enter the total (display + task) installed lighting power.
Unit: W

Lighting Schedule Name

Defrost Type

Type: choice (HotFluid, Electric, None or OffCycle)
HotFluid includes either hot gas defrost for a DX system or Hot Brine defrost if this walk in is cooled by brine from a secondary chiller
Default: Electric

Defrost Control Type

Type: choice (TimeSchedule or TemperatureTermination)
Default: TimeSchedule

Defrost Schedule Name

Defrost Drip-Down Schedule Name

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
The schedule values should be 0 (off) or 1 (on) The start time for each defrost period in this drip-down schedule should coincide with the start time for each defrost period in the defrost schedule (previous input field).The length of each defrost drip-down period must be greater than or equal to the corresponding defrost period specified in the defrost schedule. This extra time allows the melted frost to drip from the coil before refrigeration is restarted.

Defrost Power

Type: real number
Needed for all defrost types except none and offcycle
Unit: W
Minimum: 0.0

Temperature Termination Defrost Fraction to Ice

Type: real number
This is the portion of the defrost energy that is available to melt frost Needed only for defrost control type TemperatureTermination defaults to 0.7 for electric defrost and to 0.3 for hot fluid defrost
Unit: dimensionless
Maximum: 1.0

Restocking Schedule Name

Average Refrigerant Charge Inventory

Type: real number
This value is only used if the Cooling Source Type is DXEvaporator
Unit: kg
Default: 0.0

Insulated Floor Surface Area

Type: real number
Floor area of walk-in cooler
Unit: m2

Insulated Floor U-Value

Type: real number
The default value corresponds to R18 [ft2-F-hr/Btu] To convert other IP R-values to U, divide 5.678 by the R-value Some examples: R15 is U 0.3785 W/m2-K R5 is U 1.136 W/m2-K
Unit: W/m2-K
Default: 0.3154

Zone 1 Name

Type: list of objects ( or ZONE)
This must be a controlled zone and appear in a ZoneHVAC:EquipmentConnections object. The walk-in cooler can face multiple zones. The heat exchange with each zone must be input separately

Total Insulated Surface Area Facing Zone 1

Type: real number
Area should include walls and ceilings, but not doors
Unit: m2

Insulated Surface U-Value Facing Zone 1

Area of Glass Reach In Doors Facing Zone 1

Type: real number
Unit: m2
Default: 0.0

Height of Glass Reach In Doors Facing Zone 1

Type: real number
Unit: m
Default: 1.5

Glass Reach In Door U Value Facing Zone 1

Type: real number
The default value corresponds to R5 [ft2-F-hr/Btu] To convert other IP R-values to U, divide 5.678 by the R-value
Unit: W/m2-K
Default: 1.136

Glass Reach In Door Opening Schedule Name Facing Zone 1

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Area of Stocking Doors Facing Zone 1

Type: real number
Unit: m2
Default: 0.0

Height of Stocking Doors Facing Zone 1

Type: real number
Unit: m
Default: 3.0

Stocking Door U Value Facing Zone 1

Type: real number
The default value corresponds to R15 [ft2-F-hr/Btu] To convert other IP R-values to U, divide 5.678 by the R-value Some examples: R5 is U 1.136 W/m2-K R18 is U 0.3154 W/m2-K
Unit: W/m2-K
Default: 0.3785

Stocking Door Opening Schedule Name Facing Zone 1

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Stocking Door Opening Protection Type Facing Zone 1

Type: choice (None, AirCurtain or StripCurtain)
Use StripCurtain for hanging strips or airlock vestibules
Default: AirCurtain

Zone 2 Name

Type: list of objects ( or ZONE)
Required if more than one zone This must be a controlled zone and appear in a ZoneHVAC:EquipmentConnections object.

Total Insulated Surface Area Facing Zone 2

Type: real number
Area should include walls and ceilings, but not doors required if more than one zone
Unit: m2

Insulated Surface U-Value Facing Zone 2

Area of Glass Reach In Doors Facing Zone 2

Type: real number
Unit: m2
Default: 0.0

Height of Glass Reach In Doors Facing Zone 2

Type: real number
Unit: m
Default: 1.5

Glass Reach In Door U Value Facing Zone 2

Type: real number
The default value corresponds to R5 [ft2-F-hr/Btu] To convert other IP R-values to U, divide 5.678 by the R-value
Unit: W/m2-K
Default: 1.136

Glass Reach In Door Opening Schedule Name Facing Zone 2

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Area of Stocking Doors Facing Zone 2

Type: real number
Unit: m2
Default: 0.0

Height of Stocking Doors Facing Zone 2

Type: real number
Unit: m
Default: 3.0

Stocking Door U Value Facing Zone 2

Stocking Door Opening Schedule Name Facing Zone 2

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Stocking Door Opening Protection Type Facing Zone 2

Type: choice (None, AirCurtain or StripCurtain)
Use StripCurtain for hanging strips or airlock vestibules last extensible set begins here dup remaining 12 lines as many times as there are zones exchanging heat with walk-in Move the ending semicolon and increment the field numbers.
Default: AirCurtain

Zone 3 Name

Type: list of objects ( or ZONE)
This must be a controlled zone and appear in a ZoneHVAC:EquipmentConnections object. required if more than two zones

Total Insulated Surface Area Facing Zone 3

Type: real number
Required if more than two zones Area should include walls and ceilings, but not doors
Unit: m2

Insulated Surface U-Value Facing Zone 3

Area of Glass Reach In Doors Facing Zone 3

Type: real number
Unit: m2
Default: 0.0

Height of Glass Reach In Doors Facing Zone 3

Type: real number
Unit: m
Default: 1.5

Glass Reach In Door U Value Facing Zone 3

Type: real number
The default value corresponds to R5 [ft2-F-hr/Btu] To convert other IP R-values to U, divide 5.678 by the R-value
Unit: W/m2-K
Default: 1.136

Glass Reach In Door Opening Schedule Name Facing Zone 3

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Area of Stocking Doors Facing Zone 3

Type: real number
Unit: m2
Default: 0.0

Height of Stocking Doors Facing Zone 3

Type: real number
Unit: m
Default: 3.0

Stocking Door U Value Facing Zone 3

Stocking Door Opening Schedule Name Facing Zone 3

Type: list of objects (SCHEDULE:FILE, SCHEDULE:CONSTANT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:COMPACT or EXTERNALINTERFACE:SCHEDULE)
Schedule values should all be between 0.0 and 1.0. For example, if the door is open 30% of the time during working hours, then the schedule would hold the value 0.3 during working hours and 0 during other hours If no schedule name is entered, default is 5% open time during all hours

Stocking Door Opening Protection Type Facing Zone 3

Type: choice (None, AirCurtain or StripCurtain)
Use StripCurtain for hanging strips or airlock vestibules
Default: AirCurtain