Product tab
Nominal Cooling Capacity
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Default: Auto Size
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Typical Range: 50 to 500 tons
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Min Max: 0 < X < 999,999
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Units: W; kW; Btuh; Mbh
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This field specifies the nominal cooling capacity of the chiller.
Full Load Energy Rate
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Default: 0
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Typical Range: 4.0 to 5.6 COP
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Min Max: 0 to 999,999
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Units: kW/ton, therms/ton-hr, Mbh/ton, kW/Mbh, kW/kW, COP, EER
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This numeric input field is the chiller’s coefficient of performance for compressor energy. It should not include energy use due to pumps.
Optimum Part Load Ratio
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Default: 100%
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Typical Range: 10 to 100%
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Min Max: 0 to 100%
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Units: %
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This numeric field contains the chiller’s optimum part-load ratio. This is the part-load ratio at which the chiller performs at its maximum COP.
Sizing Factor
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Default: 100%
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Typical Range: 10 to 100%
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Min Max: 0 to 999,999
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Units: %
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The sizing factor is used when the capacity is selected as auto sized. The autosizing calculations are performed as usual and the results are multiplied by the sizing factor.
Design Water Temperatures
Design Leaving Chilled Water Temperature
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Default: 44°F/6.67°C
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Typical Range: 44 to 45°F/6.67 to 7.2°C
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Min Max: 20°F/-7°C
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Units: °F/°C
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This field contains the chiller’s leaving chilled water temperature.
Design Entering Condenser Water Temperature
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Default: 85°F/29.4°C
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Typical Range: 85 to 95°F / 29.4 to 35°C
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Min Max: 75 to 120°F/23.8 to 48.8°C
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Units: °F/°C
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This field contains the chiller’s entering condenser fluid temperature.
Compressor
Compressor Type
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Default: N/A
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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This field defines the chiller’s type of compressor. The available options are: Centrifugal, Generic Screw, Helical Rotary, Reciprocating and Scroll.
Compressor Heat Rejection Fraction
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Default: 100
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Typical Range: 60 < x < 100
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Min Max: 0 < x < 100
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Units: %
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This input represents the fraction of compressor electrical energy consumption that must be rejected by the condenser loop. Enter a value of 100% when modeling hermetic chillers. For open chillers, enter the compressor motor efficiency.
Operational Limits
Leaving Chilled Water Temperature Low Limit
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Default: 44°F/6.67°C
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Typical Range: N/A
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Min Max: 10 to 60°F
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Units: °F / °C
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This field contains the lower limit for the leaving chilled water temperature. This temperature acts as a cut off for heat transfer in the evaporator, so that the fluid doesn’t get too cold.
Heat Recovery
Enable Heat Recovery
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Default: N/A
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Typical Range: N/A
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Min Max: N/A
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Units: Yes/No
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This field is prompting the user if heat recovery is enabled on this chiller. Heat recovery can be achieved with either a single condenser bundle or an auxiliary condenser.
Nominal Heat Recovery Capacity
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Default: 100%
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Typical Range: 50 to 100%
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Min Max: 0 to 100%
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Units: % of Cooling Capacity
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This field is represents the amount of thermal energy, as a percentage of the cooling capacity, which can be extracted for service-water heating / pre-heating. It is only displayed when Enable Heat Recovery is set to Yes.
Entering Condenser Water Temp. High Limit
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Default: 100°F/37.78°C
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Typical Range: 100°F to 105°F/37.78°C to 40.56°C
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Min Max: 100°F to 105°F/37.78°C to 40.56°C
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Units: °F/°C
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This field is represents the high limit for the condensing temperature of the water. It is only displayed when Enable Heat Recovery is set to Yes.
Heat Recovery Pump Type
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Default: Constant Speed Pump
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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This field is represents what pump type is used to circulate hot water to service-water destination. User can choose either constant speed or variable speed. It is only displayed when Enable Heat Recovery is set to Yes.
Heat Recovery Pump
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Default: 90.1 CV Chilled Water Pump
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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This field is represents the actual pump and its’ associated properties that will be used for heat recovery. It is only displayed when Enable Heat Recovery is set to Yes.