Upgrade of Water Towers
YUTO Yibin achieved 100% energy savings by directing the water loop of the cooling tower through a turbine at a specified pressure and flow rate, generating output power to drive the fan for heat dissipation, delivering zero-power cooling towers.
To address issues such as scale and buildup of impurities in the cooling water system over prolonged use, which leads to reduced cooling efficiency, slow heat dissipation, and equipment corrosion, YUTO Yibin has adopted a closed-loop circulation for the system. This conversion prevents the buildup of scale, pollution, and corrosion in the pipelines, which extends the lifespan of pipelines and equipment while boosting cooling efficiency.
Promotion of Negative Pressure (Vacuum) Practices in Workshops
At YUTO Xuchang, the incoming area of the laminating machine in workshops previously utilized suction motors to generate negative pressure, while vacuum generators were used for production lines to provide negative pressure for suction cups. This setup, however, involved the use of energy-intensive equipment with high noise levels. In 2023, we upgraded the assembly line units by eliminating the suction fans and vacuum generators, instead promoting the use of centralized negative pressure in the workshop. This not only saves energy but also effectively controls the noise generated during operation.
Saving Energy in Workshops with AHU Variable Frequency Control
At YUTO Xuchang, workshops previously adopted water-cooled air handling units (AHUs) for central air conditioning. When the workshop temperature reaches the set temperature, the cooling valve will automatically close, preventing the circulation of cold water in the AHU for cooling. However, a large number of fans continue to run at full speed, resulting in high power consumption.
In 2023, we upgraded the AHUs to include the function of variable frequency control. With this upgrade, when the cooling valve closes, and if only air supply is required (instead of cooling), the frequency drive will automatically lower the fan speed, reducing the operating power. This keeps the air conditioning system running at a low speed, which meets the usage requirements while slashing power consumption. As a result, we saved 1.67 million kWh of electricity in a year, equivalent to reducing 1,664 tons of carbon dioxide.
Energy-saving Upgrade of Central Air Compressor Station at YUTO Dongguan’s Dalingshan Park
In 2023, YUTO Dongguan carried out an energy-saving upgrade of the central air compressor station of the Dalingshan Industrial Park. The upgrade included the adoption of a one-stop energy management solution covering efficient design, efficient construction, efficient control, and efficient operation. The park’s annual energy consumption was simulated from the four dimensions to optimize equipment selection and reduce pipeline resistance. The solution also helps minimize energy loss and improve energy efficiency.
We also upgraded the control system of the station with the installation of a high-efficiency intelligent control system that monitors and controls the mechanical and electrical equipment, air compression system, and cooling water system of the high-efficiency air compressor station through visualized production data. Featuring automated control, the system can activate or deactivate equipment according to the specific requirements and configure an appropriate number of equipment and operating parameters automatically to minimize human errors and ensure efficient operations.
Recycling Wastewater from Water Distillers
In YUTO Xuchang’s workshops, the matching water distillers of humidifiers generate a significant amount of wastewater, in addition to pure water. The wastewater was previously discharged after treatment. In the meantime, tap water was used for screen washing in the workshops. To address the issue, in 2023, we added a wastewater collection tank to the water distillers, allowing us to recycle the wastewater for screen washing in the workshops. This adjustment helped us save 5,500 tons of tap water during the year.