Cooling tower system

DETAILED DESCRIPTION What is claimed is: 1.
A system for controlling an aqueous coolant circulated through a cooling tower without requirement of bleed-off, comprising: means for monitoring selective characteristics of the aqueous coolant including the pH, temperature, total dissolved solids, calcium content and alkalinity thereof; computer means coupled to said monitoring means for determining a resultant value indicative of calcium content necessary in the aqueous coolant to maintain a Langelier Saturation Index therefor at a zero level based upon the monitored characteristics; and water treatment means coupled to said computer means for controlling the calcium content of the aqueous coolant necessary to maintain the zero level Langelier Saturation Index therefor by adjusting the calcium concentration of raw make-up water supplied to the cooling tower in accordance with said resultant value.
2.
A system according to claim 1, wherein said water treatment means comprises: water softening means for treating raw make-up water supplied to the cooling tower so that the calcium concentration of the raw make-up water is reduced substantially to zero; and controlled by-pass means coupled to said computer means for feeding a controlled amount of raw make-up water around said water softening means and directly to the cooling tower thereby introducing an amount of calcium to the aqueous coolant in accordance with said resultant value.
3.
A system according to claim 2, wherein said controlled by-pass means comprises: a fluid line adapted to feed the cooling tower in by-pass of said water softening means; and control valve means connected within said fluid line and coupled to said computer means for regulating the flow of raw make-up water around said water softening means in proportion to the flow of treated water therethrough.
4.
A system according to claim 3, wherein said control valve means comprises: a fluid valve installed within said fluid line; and controller means connected to said fluid valve and coupled to said computer means for adjusting flow through said valve