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Characteristics of Evaporative Condenser Chillers and Methods for Treating Scale Formation
Release Date:
2019-12-03
Characteristics of Evaporative Condenser Chillers and Methods for Treating Scale Formation
After prolonged use, evaporative condenser chillers can develop scale buildup. If left untreated, this scale can impair the equipment’s normal operation over time. Therefore, it is essential to perform regular descaling after each use. If you’re unsure how to carry out this task, the following section provides a detailed guide.
I. Characteristics of Evaporative Condenser Chillers
1. Small footprint
Easy installation and short construction period: No cooling tower is required, allowing greater flexibility in installation location. It can be installed in underground air-conditioning shafts, occupying even less space. The piping system is simple, with no additional water‑system components, reducing material requirements and shortening the construction timeline.
2. Energy conservation
The evaporator’s uniquely engineered design lowers the refrigeration system’s condensing temperature and pressure, increases the compressor’s cooling capacity, and reduces power consumption. Its air‑flow requirement is relatively modest—only one‑third of that of conventional air‑cooled screw‑type units.
3. Reduce maintenance costs
In systems employing evaporative cooling, the condensing temperature is lower, leading to reductions in discharge pressure, discharge temperature, and lubricant oil temperature. This improves the operating conditions of the compressor, enabling it to function under optimal circumstances, thereby extending its service life, increasing its trouble-free operating intervals, enhancing system reliability, and reducing maintenance costs.
II. Methods for Treating Scale in Evaporative Condenser Chillers
1. Physical Cleaning Method
Physical cleaning is primarily performed using a flexible‑shaft brush. The flexible shaft is driven by the cleaner’s motor, and its tip is fitted with a nylon bristle brush. During operation, the shaft and brush are inserted into the condenser’s copper tubes, where the high‑speed rotating brush removes fouling from the tube interiors. Finally, the system is rinsed with clean water. This type of equipment is known as a tube‑cleaning machine.
2. Chemical Cleaning Method
(1) A circulation pump and piping can be connected between the cleaning tank and the condenser to form a closed loop, allowing the cleaning solution to circulate continuously for 12–24 hours, thereby dissolving and removing deposits.
(2) The cleaning solution can be added to the cooling water system at a specified ratio, and the cooling pump can be run in circulation for 12–24 hours. During this time, the deposit layer is continuously subjected to the chemical action and scouring effect of the cleaning solution, causing it to dissolve and detach. However, this method requires a large quantity of cleaning chemicals, resulting in high costs.
(3) Prepare the cleaning solution according to the specified ratio, introduce it into the condenser, and allow it to stand for 5–10 hours to soften and dissolve any deposits. Drain the cleaning solution, then rinse thoroughly with clean water.
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Zhejiang Loda Refrigeration Technology Co., Ltd.
Phone:0571-88587986 88543696 88543697
Address: Xiayang Village, Xiazhuhu Subdistrict, Deqing County, Huzhou City, Zhejiang Province
Fax: 0571-88526093
