PumpSpeedDischargeTable
Input
- status: pump status (on = 1 or off = 0). Can be equidistant or non-equidistant.
- speed: a speed value is either the pump speed (Hz) or a percentage or fraction of the capacity of the pump. Can be equidistant or non-equidistant.
Coefficient set
Contains a table with one or more table records. Each record lists the discharge of the pump for a given speed. Speeds need to be in ascending order. For speed values between records linear interpolation will be applied to get the discharge. For speed values outside the table range a warning will be logged and the discharge will be equal to the first (or last) discharge defined in the table.
Output
- discharge: discharge of the pump.
Description
Calculates discharge of a speed-controlled pump with a fixed capacity. When the pump is on, then the discharge of the pump depends only on the speed. The discharges for different speeds are defined in a table in a coefficientSet.
Input can be equidistant or non-equidistant. First the intermediate result (discharge) is calculated at each time that is present either in the status input series or in the speed input series or in both input series. At a given time t1 the calculation uses the most recent status input value before t1 to determine if the pump is on and the most recent speed input value before t1 to lookup the discharge (= previousDischarge) in the speed discharge table. If the pump is off, then the intermediate discharge at t1 is 0. If the pump is on, then the intermediate discharge at t1 equals previousDischarge*(t1 - t0). t0 is the most recent input time before t1 (either status or speed input time, whichever changed most recently). Finally the intermediate discharge is aggregated to the times in the equidistant output time series.
