ZHcooler GROUP

ZHcooler GROUP Focus on heat exchanger&cold plate.Twenty years of experience in heeat exchanger design, we service the global.

15/06/2026

Marine & Offshore Hydraulic Cooling
Marine hydraulic systems (crane, winch, propulsion) operate in saltwater, high humidity, and varying loads. Cooling prevents oil degradation and ensures reliability in critical operations.
Critical parameters: Working pressure 20–35 MPa, flow 80–400 L/min, heat load 30–120 kW. Seawater-cooled U-tube exchangers (titanium tubes for corrosion resistance) or air-cooled units are used. Typical temperature control: 50–65°C, with pressure drop

13/06/2026

Metallurgical & Steel Mill Hydraulic Cooling
Metallurgical hydraulic systems (continuous casters, rolling mills) face extreme ambient heat (50–80°C) and 24/7 operation. Oil temperatures often exceed 85°C without cooling, accelerating oil oxidation and seal failure.
Key specs: System pressure 10–40 MPa, flow 100–500 L/min, heat load 40–200 kW. Water-cooled shell-and-tube or plate exchangers (heat transfer coefficient 300–500 W/m²·K) are preferred. A typical continuous caster uses an 80 kW cooler, stabilizing oil at 45±3°C.
Cooling maintains oil cleanliness (NAS 8–10) and extends service intervals.


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12/06/2026

Construction Machinery Hydraulic Cooling
Hydraulic systems in excavators, concrete pumps, and road pavers operate under severe dust, high ambient temperature (up to 50°C), and cyclic heavy loads. Effective cooling maintains oil viscosity (ISO VG 46/68) within 45–60°C, preventing seal degradation and internal leakage.
Typical parameters: Working pressure 1.6–32 MPa, flow 50–300 L/min, heat load 15–60 kW. Air-cooled plate-fin exchangers (heat transfer coefficient 15–25 W/m²·K) are widely used, with 24V DC fans for independent power. For example, a 20-ton excavator uses a 2.5 m² cooler, reducing oil temperature from 78°C to 55°C at 45°C ambient.
Proper cooling extends component life by 30–50% and reduces unplanned downtime.


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11/06/2026

Structural Upgrade and Performance Improvement of High-Efficiency Aftercoolers
With the increasing demand for industrial energy saving, aftercoolers are gradually upgrading towards modularization, intelligence, and high efficiency. Structural optimization and functional extension have significantly improved their adaptability and operational stability, and the core technical parameters and performance have been greatly improved.
In terms of structural upgrading, new-type aftercoolers adopt a "horizontal + vertical" two-stage cooling structure. The horizontal cooler is responsible for primary cooling, and the vertical cooler is responsible for secondary cooling and oil-water separation. When the inlet temperature is 160～200℃, it can be stably cooled to 40～50℃ after two-stage cooling, with an oil-water separation rate of ≥99%. The arc design at the bottom can centrally collect condensate, increasing the discharge efficiency by 30%. In terms of materials, high-end models adopt titanium alloy heat exchange tubes or inner wall ceramic coatings, which increase corrosion resistance by 50%, are suitable for harsh working conditions such as chemical industry and food industry, and extend the service life to 10～12 years.
Performance improvement is reflected in intelligence and energy efficiency: integrating intelligent temperature control modules and remote communication interfaces can real-time monitor inlet and outlet temperatures and pressure differences, and issue early warnings when cooling efficiency declines; the application of EC variable frequency fans reduces the noise of air-cooled aftercoolers to below 70dB and energy consumption by 25%～30%. At the same time, the heat exchange efficiency is increased to more than 92%, the potential for waste heat recovery is further released, and the comprehensive energy utilization rate of the air compression system is increased to more than 85%, which is in line with the requirements of industrial energy efficiency improvement.

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08/06/2026

Xinxiang Zhenhua Radiator Co., Ltd. Exhibits at EPOWER2026 & IDCEXPO 2026 in Shanghai
Focusing on power energy innovation and empowering green computing for data centers! From June 3 to 5, 2026, Xinxiang Zhenhua Radiator Co., Ltd. will showcase our cutting-edge heat exchange solutions at two major industry exhibitions held at Shanghai New International Expo Center: the 26th EPOWER Exhibition (Booth: 2-690) and the 12th IDCEXPO Data Center Exhibition. We sincerely welcome customers worldwide to visit our booth and explore the new future of high-efficiency heat dissipation.
As a high-tech enterprise dedicated to the heat exchange industry, we specialize in the R&D, production and customization of plate-fin heat exchangers. Supported by 32 patented technologies and sophisticated craftsmanship, our products feature high heat exchange efficiency, compact lightweight structure and outstanding reliability. Adopting high thermal conductivity aluminum alloy and dense corrugated fins to expand heat transfer area, our products deliver 3 to 5 times higher efficiency than traditional shell-and-tube exchangers. The fully brazed sealing structure operates stably within a wide temperature range from -40℃ to +200℃ and a maximum pressure of 30 bar, adapting to harsh working conditions of industrial hydraulic systems, power equipment and construction machinery with zero leakage during long-term operation.
To meet the demands of high-density heat dissipation, low PUE and water & energy conservation for data centers, we present our integrated dry cooler solutions. Equipped with high-performance plate-fin cores, energy-saving fans and intelligent control systems, our air-liquid heat exchange dry coolers drastically cut water consumption by over 75% and reduce operation costs by half compared with conventional cooling towers. Capable of stable year-round cooling and precise temperature control, they perfectly serve high-power density cabinets of 30-50kW, helping computing and supercomputing centers achieve low-carbon development in line with the carbon peaking and neutrality goals.

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22/05/2026

Application and Technical Requirements of Heat Exchangers in Air Compressor Waste Heat Recovery
More than 70% of the electrical energy consumed by air compressors is converted into waste heat. Recycling this waste heat through heat exchangers can achieve energy saving and consumption reduction. Among them, lubricating oil waste heat (60～90℃) and compressed air waste heat (80～150℃) are the main recovery targets. The selection and parameter matching of heat exchangers directly determine the recovery efficiency.
Plate heat exchangers are used for lubricating oil waste heat recovery, with a heat exchange efficiency of ≥90%, oil side pressure of ≤1.0MPa, and water side pressure of ≤0.6MPa. They can cool the lubricating oil from 60～90℃ to 45～55℃, and the recovered heat can heat cold water from 20～30℃ to 50～60℃, meeting the needs of workshop heating or domestic hot water. A single 37kW air compressor equipped with a plate heat exchanger, operating for 3000 hours a year, can recover about 8.64×10⁶kJ of heat and save about 12,000 yuan in electric heating costs.
Double-pipe heat exchangers are selected for compressed air waste heat recovery. The inner tube is made of 316 stainless steel, with a pressure resistance of ≥1.6MPa and a heat exchange efficiency of ≥85%. They can cool 80～150℃ compressed air to 40～60℃. The recovered heat is used for boiler feed water preheating, which can reduce boiler energy consumption by 10%～15%. The recovery system must be equipped with a temperature sensor (accuracy ±1℃). When the outlet temperature of compressed air is ＜40℃, the bypass valve opens automatically to avoid condensation freezing and affecting subsequent systems.

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20/05/2026

Common Faults and Technical Troubleshooting Schemes of Aftercoolers
After long-term operation, aftercoolers are prone to faults such as poor cooling effect, leakage, and abnormal noise, which are mostly related to parameter abnormalities and improper maintenance. Combining technical data for troubleshooting can quickly locate problems and reduce the risk of unplanned downtime.
Poor cooling effect is the most common fault, with the core judgment standard: the temperature difference between inlet and outlet should be ≤8℃ under normal operating conditions. If the temperature difference is lower than 5℃, two points need to be checked: first, blockage of air-cooled fins, which can be cleaned with a 0.3MPa high-pressure water gun (water flow parallel to the fins), and the heat exchange efficiency can be restored to more than 95% of the design value after cleaning; second, insufficient cooling water flow in water-cooled types. The standard flow rate needs to match the air handling capacity (e.g., 0.8t/h cooling water for 3Nm³/min air volume). Insufficient flow rate will cause the outlet temperature to exceed 45℃, so it is necessary to adjust the valve to increase the flow rate or clean the pipeline blockage.
For leakage faults, focus on checking seals and materials: if the cooling water consumption of a water-cooled cooler suddenly increases by more than 10%, it may be due to corrosion and leakage of heat exchange tubes. It is necessary to detect the corrosion of the tube sheet and perform anti-corrosion treatment on the corrosion points; for air-cooled types, it is mostly due to aging of sealing gaskets. After replacing with oil-resistant and temperature-resistant gaskets, the leakage rate can be reduced to 0‰. In addition, when it is detected that the pressure difference of the cooler increases by 15% or the outlet temperature fluctuates by more than ±3℃, it is necessary to issue an early warning and conduct troubleshooting and maintenance in a timely manner to avoid expanding the fault.

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19/05/2026

Types and Energy Efficiency Optimization Techniques of Air Compressor Heat Exchangers
Air compressor heat exchangers are core components for system heat dissipation and energy saving, mainly divided into three types: plate type, shell-and-tube type, and double-pipe type. Different types of structures and energy efficiency characteristics are suitable for different industrial scenarios. Reasonable optimization can improve the comprehensive energy utilization rate of the system by 8%～12%.
Plate heat exchangers are made of 304 or 316L stainless steel, with a plate spacing of 2～3mm and a heat exchange efficiency of ≥90%. They are suitable for lubricating oil with a viscosity of ≤100cSt, and the pressure drop on the compressed air side is controlled within 0.02～0.05MPa to avoid increasing air compressor energy consumption. They are mainly used for lubricating oil waste heat recovery and compressed air pre-cooling, and the heat exchange area of a single unit can be adjusted to 2.25～8.0㎡ according to needs. Shell-and-tube heat exchangers have a robust structure, with compressed air flowing inside the tubes and cooling water flowing between the tubes. They can withstand a pressure of up to 1.6MPa and have a heat exchange efficiency of 85%～90%, suitable for high-pressure and large-flow working conditions. For example, the GHL-40/0.8 model has an air handling capacity of 40Nm³/min, a heat exchange area of 8.0㎡, and a cooling water consumption of 11t/h.
Energy efficiency optimization can be carried out from two aspects: first, regularly clean the dirt on the heat exchange surface to avoid attenuation of heat exchange efficiency (dirt can reduce efficiency by 15%～20%); second, adopt frequency conversion control to adjust the medium flow rate of the heat exchanger according to the air compressor load. When the load drops to 50%, the cooling energy consumption can be saved by about 30%, and the equipment maintenance cycle can be extended to once every 6 months.

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18/05/2026

Core Technical Parameters and Selection Points of Air Compressor Aftercoolers
The high-temperature compressed air discharged by air compressors (up to 120℃～180℃ under standard operating conditions) must be cooled by an aftercooler to avoid damage to subsequent systems and improve the quality of compressed air. The core performance of an aftercooler is determined by its technical parameters, and the selection must accurately match the air compressor model and operating conditions.
Mainstream aftercoolers are divided into air-cooled and water-cooled types, with significant differences in key technical parameters: Water-cooled (shell-and-tube) types have an operating pressure range of 0.8MPa～1.6MPa and a heat exchange efficiency of over 92%. Under operating conditions of an inlet temperature of 35℃ and an exhaust pressure of 0.7MPa, they can stably cool 150℃ compressed air to below 45℃, reducing the saturated water v***r content of compressed air from 190 grams to 6.5 grams per cubic meter, with a condensate separation rate of ≥99%. Taking the GHL-10/1.0 model as an example, its air handling capacity is 10Nm³/min, design pressure is 1.25MPa, heat exchange area is 5.7㎡, and cooling water consumption is 2.6t/h, which is suitable for medium-sized screw air compressors.
Air-cooled aftercoolers adopt large-inclination aluminum fins and EC variable frequency fans. When the inlet temperature is ≤160℃, the outlet temperature can be controlled at ambient temperature +10～15℃, with an operating pressure of 0.8～1.0MPa and noise ≤75dB. They do not require circulating cooling water and are suitable for water-scarce working conditions. During selection, it is crucial to match the air handling capacity with the air compressor's exhaust volume (deviation ≤10%), and at the same time consider the corrosion resistance of materials—using Q345R or SUS304 stainless steel for the shell can extend the service life of the equipment to 8～10 years.

Whatsapp:+86 15603820837
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