What Cooling Method Does the Compressor in the CNG Daughter Station Use?

In the mobile refueling equipment sector, a core factor often overlooked by customers—yet one that directly determines whether equipment can operate continuously at full load in deserts, plateaus, or scorching summers—is the cooling system.

Jiangsu Huayan International Trade Co., Ltd. (HUAYAN) provides a solution that is both simple and robust: The CNG substation adopts a closed water circulation air cooling system, which independently dissipates heat from natural gas, hydraulic oil, and compression cylinders through an integrated radiator.

This is not a simple "air-cooled" or "water-cooled" concept. It is a thermal management solution meticulously tailored for CNG Filling Stations.

Why is this cooling system critical for you?

Imagine this scenario: At a logistics park or mining area, your CNG Tube Skid Trailer is refueling a fleet. The compressor operates at high frequency continuously, while the temperatures of hydraulic oil, cylinders, and compressed gas rise simultaneously.

Traditional open cooling towers require an external water source, making them highly restricted in water-scarce mining areas or cold northern regions. HUAYAN’s closed water circulation air cooling system completely eliminates dependence on on-site water sources. The coolant circulates within a fully sealed cavity, forcing heat exchange with air through large-capacity integrated radiators. Heat is “squeezed” out, with zero water consumption.

Even more critical is the “independent partitioned heat dissipation.”

Natural gas, hydraulic oil, and compression cylinders have vastly different operating temperature ranges and thermal load characteristics. HUAYAN employs a physical分流 design within the radiator for these three heat sources, preventing high-temperature cylinder heat from interfering with lower-temperature hydraulic oil. This ensures stable hydraulic system viscosity and proper compression cylinder lubrication. It not only significantly extends the life of lubricating oil and seals but also enables the compressor to maintain an extremely low failure rate even under high differential pressure conditions of 20MPa.

Beyond Cooling: An Intelligent “Thermal Manager”

Within HUAYAN’s skid-mounted system, this cooling solution is not an isolated component. It is deeply integrated with the PLC control system.

When the outlet pressure approaches 25MPa, or the ambient temperature soars above 40°C, the control system automatically adjusts the cooling fan speed and the number of active fans, even putting the cooling system into standby mode when idle. This “on-demand cooling” logic ensures the total power consumption of the entire station is strictly controlled between 25kW and 115kW. For a CNG Gas Station equipped with its own generator set operating in remote areas, every kilowatt of power is precisely allocated to the compressor’s main motor, rather than being wasted on inefficient cooling.

From 500 to 3000: A Customizable Full-Range Combat Force

More importantly, all of this can be customized according to your requirements.

From the 500Nm³/h small-flow Pressure Regulating & Metering Skid (PRMS), designed for home use or small generator set replenishment, to the 3000Nm³/h high-flow containerized daughter station, integrating generator sets, gas storage cylinders, and dual compressor heads—HUAYAN’s entire series of CNG daughter stations features this cooling architecture as standard.

You don’t need to sacrifice cooling performance for “compactness,” nor worry about heat buildup for “high flow.” The cooling system parameters for all products can be matched and designed according to your specific gas source conditions, ambient climate, and installation space.
The cooling method of HUAYAN’s CNG daughter station compressor is, in essence, a highly integrated, low-energy, maintenance-free industrial thermal management solution. It encapsulates 40 years of compressor manufacturing experience within those silently operating cooling fins.

The next time your CNG Filling Stations operate reliably in a remote mining area, remember: this stability stems from that unseen closed water circulation air cooling system, precisely “cooling down” every cubic meter of natural gas.