SYSTEM CLEANING PROCEDURES
Air conditioning or refrigeration mainly controlled heat removal from a specific area. The refrigerant that transports heat from the cooled space must be cooled before it can be reused. Cooling and condensation of the refrigerant require the use of a cooling medium, that on many systems, is water.
There are two types of water-cooled systems. The first type is used once-through operation. Water absorbs heat-and then discarded or wasted. In essence, it's 100 percent, or total bleed. Little if any concentration of mineral salts is happening. Extent, patterns is due to the collapse of bicarbonate of heat. These form of carbonates, which are less soluble at high temperatures than at low temperatures. This scale can be prevented by the use of chemicals for cleaning.
Another type of water-cooled system type, in which the heat is removed from the water by partial evaporation. The water is then recirculated. The amount of water lost by evaporation is replaced. Such a system is more economical in terms of water consumption.
However, the concentration of dissolved minerals leads to conditions that, if not controlled and chemically treated, can lead to severe scaling.
Evaporative System
One way of operating the evaporative recirculating systems includes 100 percent of evaporation of water without divorce. This, of course, leads to excessive concentration of mineral salts. Without a system reset, water conditions will soon exceed the capability of any chemical treatment. The second method uses the high bleed rate without chemical treatment. The scale of the form and waste water. The third method is to re-use water, blood and control the concentration of scale-forming minerals. Thus, minimal addition of chemicals, treatment, good water management can be implemented. This latter approach is the most logical and least expensive. Fig. 8.2 shows how connections for divorces are made on the evaporative condensers and cooling towers.
The scale is formed as a direct result of mineral unsolvability. This, in turn, is a direct function of the temperature, hardness, alkalinity, pH, and total dissolved solids. Generally speaking, these factors increase the solubility or stability of scale-forming minerals decreases. Unlike most minerals, scale-forming salts less soluble at high temperatures. For this reason, the most rapidly scale forms on heat transfer surfaces.
Cleaning evaporative cooling tower and capacitors, firstly, to determine the amount of water in the system. This is done by determining the quantity of water in the sump. Measure the length, width and depth of water in the legs.
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