a) Increased accuracy of control parameters
b) Improved Treatment administration and chemical dosing
c) Reduced chance of human error
d) Remote Operation
e) Every minute log of system data – Very important for troubleshooting
Energy, Water, and Chemical saving with better utilization of every rupee spent on chemicals
The main functionality of the Cooling Tower Controller is to dose the requisite quantity of chemicals in a predetermined proportion into the cooling tower by controlling the dosing pumps
V-Sense receives a pulse type of signal from a flow meter installed in the make-up line. The pulse meter gives out a pulse every 1000 or 5000 or 10000 lit (depending on model and size). The controller counts those pulses and based on the proportion fed into the controller – controls the chemical dosing pump ON-OFF time.
The controller is capable of controlling up to 3 chemical dosing pumps (optional default is 2 pumps) and 2 biocide dosing pumps (Optional) with a 28-day timer, i.e., after every X No of days the biocide pump will start for a certain time and will pump the desired quantity of biocide into cooling tower system.
The controller is also equipped with a conductivity monitor and controller, which is to be connected to a solenoid blowdown valve. After setting the conductivity value – the bleed valve will open automatically if the conductivity limit is crossed. The bleed valve is closed automatically once the conductivity is lower than the set point. OPTIONAL – COC control – if a conductivity sensor is installed in a makeup line – the controller is capable of controlling COC by automatically selecting the Limiting conductivity, i.e., if you set COC = 6 and makeup conductivity is 200 the blowdown valve will open at 1200 cond. Value. If makeup water conductivity changes to 300 the limit will be set to 1800 automatically. Thus, the controller will control the COC.
The controller also has an auto pH controller which will control Acid dosing and Hypo dosing as per set limits of the pH.
The controller logs and stores online data value (Conductivity & pH and flow) every 2 minutes on its board memory and the same can be downloaded for analysis through a USB port into a laptop. The controller stores data for the previous 6 months in its onboard memory.
The controller has an optional Internet Modem – with a GSM SIM card. If this is installed - the controller then communicates with a server and a website and all data are loaded onto a website automatically.
The manual activity of blowdown on time Ruther then TDS / Conductivity. Water loss in such blowdown is always then the required. With the control system solenoid valve will open only when the TDS / Conductivity of circulating water crosses the setpoint.
Water consumption in the cooling tower is having a direct relation with Evaporation Loss from the tower to achieve the desired cooling. The dosing of Corrosion and Scale inhibitor are based on actual water consumption after installation of the V-Sense System. During lower heat load, partial running of Plant chemicals dosing also will be reduced by V-Sense technology which will be net saving in terms of costly chemicals.
Use of Oxidising Biocide will be based on standard ORP. V-Sense improves disinfection by avoiding the detrimental side effects of mixing oxidizing and non-oxidizing biocides in the water (e.g. during the bleed lockout).
Biofilm and scale can drastically reduce the heat transfer performance in condensers. V-Sense technology saves energy by minimizing the risk of scale and microorganism accumulations.
Fluctuations in ORP and pH can potentially damage condensers and heat exchangers. The precise Fuzzy logic of V-Sense ensures maximum protection to your equipment by consistent control to ORP and pH.
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