- What is solution demand?
- Solution demand is the daily volume of chemical feed solution a cooling tower program needs to maintain its target dosage. It depends on blowdown (water leaving the system), the target product dosage, and the solution strength.
- What is a PTSA setpoint?
- The PTSA setpoint is the tracer fluorescence target a controller maintains to hold the program at its intended dosage. The calculator derives it from the target dosage so the controller can be programmed directly.
- How does blowdown drive chemical demand?
- Chemistry leaves a cooling system mainly through blowdown. The more a system blows down — higher makeup or lower cycles of concentration — the more chemical must be fed to replace what is lost and hold the target residual.