Case 1: Energy-Saving Solution with Inverter Compressors

Previously, only constant-speed compressors were used. However, because the required compressed air volume fluctuated significantly depending on the number of operating units, inverter compressors were selected for their energy-saving potential based on real-time operating conditions. Line pressure control was implemented on the inverter compressors, enabling operation at optimal pressure settings near the usage points at all times, resulting in a pressure reduction of approximately 1.5 bar. Additionally, by utilizing the group control function, the entire system achieved around 13% energy savings (approximately 120,000 kWh annually).

Background
The goal was to improve energy efficiency and reduce pressure in the compressor equipment.

Solution
Introduction of inverter compressors, line pressure control, and load control.
(Installed equipment: 1 unit of VS55A4, 2 units of SG55A4, plus line pressure control (OPTION))

Before　3 constant-speed compressors
After　 2 constant-speed compressors and 1 inverter compressor

Results
✔ Line pressure control enabled capacity control, allowing for optimal pressure settings near the usage points.
✔ Reduced discharge pressure by 1.5 bar.
✔ Annual electricity consumption reduced by approximately 160,000 kWh.