Auxiliary Condenser Water Loop
An Auxiliary Condenser Water Loop is an additional loop within a cooling system that facilitates heat exchange processes. It operates alongside the primary condenser water loop, enabling the system to incorporate multiple cooling sources or sinks efficiently. This secondary loop allows for complex configurations, such as integrating additional chillers or cooling towers, to meet diverse cooling demands effectively.
System
Min. Loop Temp
Specify the Min. Loop Temp by setting the minimum loop temperature, the lower limit of the acceptable temperature range for the fluid circulating in the loop.
Max. Loop Temp
Specify the Max. Loop Temp by setting the highest allowable temperature, the upper limit of the acceptable temperature range for the fluid circulating in the loop.
Load Distribution Scheme
Specify the Load Distribution Scheme to determine how the heating or cooling load is distributed among multiple system components or zones. Each option available defines a method used to allocate the thermal load based on factors such as zone characteristics, equipment capacities, and system efficiency goals.
Design Loop Exit Temp
Specify the Design Loop Exit Temp to nominate the targeted temperature of the fluid leaving a loop in a heating or cooling system under design conditions. It represents the desired thermal performance of the system and is used to size and configure system components accordingly.
Design Loop Temp. Difference
Specify the Design Loop Temp. Difference, also known as the temperature delta. This is the temperature drop or rise expected across the components of a loop in a heating or cooling system under design conditions.
Sizing
Sizing Method
Specify the Sizing Method by choosing between Autosize or Manual. Manual sizing necessitates completing all numerical fields with valid entries.
Min. Loop Flow Rate
Specify the minimum allowable rate at which fluid must circulate through a loop in a heating or cooling system. Min. Loop Flow Rate ensures that there is sufficient flow to prevent issues such as equipment damage, inefficient operation, or inadequate heat transfer.
Max. Loop Flow Rate
Specify the highest allowable rate at which fluid can circulate through a loop in a heating or cooling system. Max. Loop Flow Rate establishes the upper limit of flow to prevent issues such as excessive pressure drop, pump overload, or system inefficiency.
Plant Loop Volume
Specify the total volume of fluid contained within the loop of a heating or cooling system. It includes the volume of piping, equipment, and any additional components within the loop. Plant Loop Volume helps determine the system's thermal inertia and response time to changes in operating conditions.
Aux. Condenser Pump-Rated Power Consumption
Specify the electrical power consumed by the auxiliary condenser pump when operating at its rated conditions. Aux. Condenser Pump-Rated Power Consumption indicates the pump's energy usage under normal operating conditions and is typically provided by the pump manufacturer.
Aux. Condenser Pump Rated Flow Rate
Specify the maximum flow rate that the auxiliary condenser pump can deliver under its rated conditions. Aux. Condenser Pump Rated Flow Rate defines the pump's capacity to circulate fluid through the auxiliary condenser water loop and is specified by the pump manufacturer.
Aux. Condenser Pump Min. Flow Rate
Specify the lowest allowable flow rate at which the auxiliary condenser pump can operate without experiencing issues such as cavitation or overheating. Aux. Condenser Pump Min. Flow Rate ensures that there is sufficient flow to maintain pump performance and prevent damage during operation.
Set Point Manager
Setpoint Manager Type
Specify the type of control strategy used to manage setpoints within a heating, ventilation, and air conditioning (HVAC) system. Setpoint Manager Type determines how the system maintains desired temperatures, pressures, or other parameters in response to varying conditions.
Setpoint Manager Schedule Value
Specify the schedule or profile used by a setpoint manager to establish target setpoints for controlling HVAC system operation over time. Setpoint Manager Schedule Value defines the desired values for temperature, humidity, or other parameters at different times of day or days of the week.
Second Setpoint Manager Schedule Value
Specify the schedule or profile used in conjunction with the primary setpoint manager schedule value to establish secondary target setpoints for controlling HVAC system operation. Second Setpoint Manager Schedule Value allows for more complex control strategies to meet specific comfort or efficiency requirements.
Water Loop Pump
Pump Speed Control
Specify the pump operation mode: Constant Speed or Variable Speed. Tailor the choice to meet specific system demands and efficiency goals.
Pump Rated Head
Specify the pump's design head pressure in kiloPascals. Set this value to align with system requirements and ensure efficient pump operation. The default is 350 kPa.
Pump Design Min. Flow Rate Fraction
Specify the pump's minimum volume flow rate during variable flow capacity, in cubic meters per second. When autosized, use the Design Minimum Flow Rate Sizing Factor to scale it as a fraction of the Design Maximum Flow Rate. Ensure it's below 99% of the Design Maximum Flow Rate for a variable speed pump to avoid warnings.
Pump Motor Efficiency
Specify the efficiency of the pump motor as a numeric value. This represents the ratio of the pump motor's useful power output to its total power input.
Pump Control Type
Specify either Continuous or Intermittent operation for the pump. In Continuous mode, the pump runs continuously, adjusting its flow rate based on demand. In Intermittent mode, the pump may shut down during periods of no load on the loop, conserving energy. The pump operates intermittently during other conditions, adjusting its flow between the minimum and maximum limits to meet demand.
Pump Frac. Motor Inefficiencies to Fluid Stream
Specify the fraction of power loss to the fluid caused by the pump motor. This numeric input reflects the proportion of power lost to the fluid stream in the pump system.
Pump Design Power Sizing Method
This field is optional. Choose between Power Per Flo and "Power Per Flow Per Pressure for pump sizing. If Power Per Flow, the Design Power Consumption is calculated using the sizing factor from Design Electric Power per Unit Flow Rate. If Power Per Flow Per Pressure is chosen, the Design Power Consumption uses the sizing factor from Design Shaft Power per Unit Flow Rate Per Unit Head. The default method is "Power Per Flow Per Pressure" if unspecified.
Pump Design Elec. Power / Flow Rate / Pressure
Specify the pump's design electric power per unit flow rate per unit pressure. This input, applicable when designing power consumption, is set to autosize, and the sizing method is Power Per Flow Per Pressure, which determines the efficiency of the impeller and drive assembly for calculating pump power consumption at the design flow rate, considering motor efficiency and pump head. The default is 1.282051 W/((m³/s)-Pa).
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