Cooling Compressor and Central System Automation: Smart Control with Fuji Electric

Industrial cooling systems and central HVAC facilities play a vital role in many critical processes, from food preservation and chemical storage to facility comfort and production quality. Achieving high energy efficiency, ensuring stable pressure control, and extending equipment life in these facilities is possible with the right automation strategies. As KNC Otomasyon, we ensure the flawless management of condenser fans and cooling compressors in central systems by utilizing speed controllers, variable speed drives (VSD), and Fuji inverter technologies.

Condenser Fan and Cooling Compressor Control with Drives in Central Systems

The simultaneous and synchronized operation of compressors and fans in industrial cooling chillers directly impacts energy consumption. This process, which requires external controllers or complex PLC architectures in traditional systems, is now resolved much more practically and reliably thanks to advanced drive technologies.

The special variable speed drive models of the Frenic HVAC series from the Fuji Electric product range can directly manage the activation and deactivation of condenser fans based on high-pressure values without the need for an external controller (PLC). This built-in flexibility offered by the device reduces panel costs while minimizing the risk of system malfunctions.

Multi-Device Management Without an External PLC via Fuji Electric Frenic HVAC

The Fuji Electric Frenic HVAC series is perfectly tailored for industrial cooling and HVAC applications. The superior technical capacity and flexibility offered by the device bring the following advantages:

• Ability to Perform 4 Independent PIDs: The capability to control complex temperature and pressure cycles simultaneously.

• Rich Digital Output Infrastructure: Features a total of 5 digital outputs (3 transistors, 2 relays).

• Flexible Control for Up to 5 Devices: Thanks to these digital outputs and the built-in PID infrastructure, management of up to 5 different devices (e.g., 3 cooling compressors and 2 condenser fans) is achieved without the need for an external controller.

Example Application Scenario: Pressure-Based Cascaded Compressor and Fan Management

Let's assume there are 3 cooling compressors and 2 condenser fans in a central cooling system. With the Frenic HVAC series speed controller, the operating scenario of this system is optimized as follows:

1. Initial Operation and PID Optimization: The 1st compressor in the system starts running at a variable speed via PID control to achieve the target pressure of 3 bar.

2. Cascaded Activation: When the pressure level rises to 4 bar due to an increase in the cooling load, the drive starts the 2nd compressor via a contactor. If the pressure continues to rise, the 3rd compressor is also activated at the 4.5 bar threshold.

3. Cascaded Deactivation: As the environment begins to cool and the pressure drops, the 3rd compressor is deactivated at the 4 bar level; when the pressure drops to 3.2 bar, the 2nd compressor is stopped.

4. Sleep Mode and Energy Savings: If the cooling load decreases and the system is able to drop the pressure down to 2.5 bar with only one compressor, the system automatically enters sleep mode. By remaining in sleep mode until the pressure rises back to 3.1 bar, unnecessary energy consumption is prevented, and the stable and balanced operation of the system is guaranteed.

Highlighted Technical Features of the Frenic HVAC Series for Cooling Compressors

The Fuji Electric Frenic HVAC series Fuji inverter technology offers superior protection and performance features against the harsh operating conditions of the cooling sector:

• 4-Year Device Warranty: Assurance of long-lasting use backed by superior Japanese engineering and quality.

• Built-in PLC Function: Eliminates extra programming and control unit costs.

• Built-in DC Choke: Protects grid quality by preventing harmonic currents originating from the grid.

• Built-in EMC Filter: Ensures the safety of peripheral devices by damping electromagnetic interference.

• High Overcurrent Capacity: Maintains stability during sudden overloads with the capacity to provide 110% of the nominal current for 1 minute.

• Wide Control Capacity: The ability to flawlessly manage 1 to 3 compressors and 1 to 3 condenser fans from a single center.

Contact us today to achieve uninterrupted performance, maximum safety, and high efficiency in your production lines, and to experience our engineering approach firsthand.

Our expert team is always ready to offer the most suitable projects and solutions for your facility's needs. You can reach out to us through our contact page to get detailed information and take the first step toward adding value to your business.