Influence of Circulating Water Scaling on Energy Consumption of Air Compressor

Circulating water scaling will significantly increase the energy consumption of air compressor, mainly by reducing heat exchange efficiency, increasing system resistance, causing equipment failure and other ways to achieve. Although Grantklin water-lubricated screw air compressor reduces some scaling risks through oil-free design, it still needs to pay attention to circulating water treatment to ensure energy efficiency.

Influence Mechanism of 1. Circulating Water Scaling on Energy Consumption of Air Compressor

1. decreased heat exchange efficiency leads to increased energy consumption
   after the circulating water scales, the scale (mainly calcium carbonate) will be deposited on the surface of the heat exchanger to form a thermal insulation layer. For example, 1mm thick scale can reduce the heat exchange efficiency by 10%-20%, causing the air compressor to run longer or higher power output to reach the set temperature, directly increasing power consumption.

2. Additional energy consumption due to increased system resistance
   scale accumulation will reduce the cooling water pipe diameter, increase the flow resistance. For example, for every 1mm increase in the thickness of the scale in the pipeline, the system resistance may increase by 5%-15%, forcing the water pump and cooling tower to increase the speed to maintain the flow rate and further consume electricity.

3. Unplanned downtime and wasted energy consumption due to equipment failure
   severe scaling may cause high temperature shutdown of air compressor. For example, due to the high hardness of circulating water in a chemical enterprise, the air compressor needs to be shut down to clean the heat exchanger every 3 months on average, and the additional power consumption of about 500 kW hours is required for each shutdown recovery, which affects the continuity of production.

Technical Advantages and Scaling Risk Control of 2. Grankering Air Compressor

1. oil-free design reduces the risk of oil fouling
   granklin air compressor adopts single screw plus star wheel structure, and replaces lubricating oil with water to realize compression process, eliminating oil pollution risk from the source. The traditional oil air compressor is easy to form grease due to oil residue, while the Granklin model can avoid such problems and reduce the adhesion of pollutants on the surface of the heat exchanger.

2. Efficient heat transfer design to improve energy efficiency
   granklin air compressor through the optimization of cooling water circuit design, to ensure uniform distribution of water flow, reduce the risk of local overheating. For example, its heat exchanger adopts high-efficiency fin structure, which can maintain higher heat exchange efficiency under the same degree of fouling, and reduce energy consumption by about 8%-12% compared with traditional models.

3. Water quality adaptability optimization to reduce the probability of scaling
   for different water quality conditions, Granklin air compressor can be matched with water softening equipment or physical water treatment device. For example, in areas with high hardness, calcium and magnesium ions in water are removed by cation exchange resin, and the hardness of circulating water is controlled below 200mg/L, which significantly delays the scaling rate.

Suggestion on Circulating Water Treatment of 3. Grankering Air Compressor

1. regular monitoring of water quality indicators
   it is recommended to test the hardness, pH value, conductivity and other parameters of circulating water every quarter. For example, when the hardness exceeds 300mg/L or the pH value deviates from the range of 7-8, the water treatment plan needs to be adjusted in time to avoid the risk of scaling.

2. Optimizing the Design of Circulating Water System

   • increase pipe diameter: Select the appropriate pipe diameter according to the flow demand to reduce the turbulent scaling caused by the excessive flow speed;
   • periodic blowdown: Discharge high-concentration circulating water through the bottom drain valve, and control the concentration ratio between 3-5 times;
   • cleaning the heat exchanger: Use high-pressure water gun or chemical cleaning agent to clean up the scale inside the heat exchanger every 1-2 years to restore the heat exchange efficiency.

Application Cases and Effect Verification in 4. Industry

1. energy-saving transformation of a textile enterprise
   the enterprise originally used the traditional oil air compressor, and the energy consumption increased by 15% due to the scaling of circulating water. After switching to Granklin oil-free air compressor and supporting demineralized water equipment, the heat exchange efficiency is increased by 20%, the annual electricity cost is saved by about 120000 yuan, and the cleaning frequency of equipment is reduced by 50%.

2. Practice of Water Quality Optimization in an Electronic Factory
   the hardness of the circulating water in the plant reaches 500mg/L, which leads to frequent high temperature alarm of the air compressor. By installing a physical water processor and controlling the concentration ratio within 4 times, the scaling speed is reduced by 80%, and the operation stability of the air compressor is significantly improved.