Heat exchanger
Cross flow heat exchanger,
Counter flow heat exchanger,
Rotary heat exchanger,
Steam Heating Coil
Bridges cutting-edge technology with global trade opportunities, fostering sustainable industrial growth.
Dedication And Professional Success
We specialize in the production of cross flow and counter flow heat exchangers, rotary heat exchangers, heat pipe heat exchangers, as well as air conditioning units and heat recovery units developed using heat exchange technology
Heat recovery
Waste heat recovery from flue gas,Heat pump drying waste heat recovery,Mine exhaust heat extraction
Air handling unit
Hygienic Air Handling Unit,
AHU With Heat Recovery,
Thermal wheel AHU,
AHU chilled water coil
Fresh air system
Heat recovery fresh air ventilator,Heat pump fresh air ventilator,Unidirectional flow fresh air fan,Air purifier
Main scenes
Air to air heat exchangers are widely used in boiler flue gas waste heat recovery, heat pump drying waste gas waste heat recovery, food, tobacco, sludge, printing, washing, coating drying waste gas waste heat recovery, data center indirect evaporative cooling systems, water vapor condensation to remove white smoke, large-scale aquaculture energy-saving ventilation, mine exhaust heat extraction, fresh air system heat recovery and other fields
Application scenarios
If you have a need for air to air heat exchangers, you can contact us
Indirect adiabatic cooling systems for data centers use a combination of evaporative cooling and heat exchange to efficiently manage heat loads while minimizing water use and maintaining air quality. Below is an explanation of how these systems work and their application in data centers:
Principle of Operation
Indirect adiabatic cooling leverages the natural cooling effect of water evaporation without directly introducing moisture into the data center’s internal air stream. The process involves two separate airflows and a heat exchanger:
- Primary Airflow (Data Center Air):
- Warm air from the data center (generated by servers and IT equipment) circulates through one side of a heat exchanger in a closed loop.
- This air is cooled by transferring its heat to the secondary airflow without mixing.
- Secondary Airflow (Outdoor Air):
- Outdoor air (scavenger air) is drawn into the system and passed over wetted media or sprayed with fine water droplets.
- As the water evaporates, it absorbs heat from the outdoor air, lowering its temperature (approaching the wet-bulb temperature).
- This cooled outdoor air then flows through the other side of the heat exchanger, absorbing heat from the primary airflow.
- Heat Exchange:
- The heat exchanger (typically plate-type or tube-based) facilitates the transfer of heat from the warm data center air to the cooled outdoor air.
- The cooled primary air is then returned to the data center, while the warmed secondary air is exhausted outside.
- Adiabatic Enhancement:
- The evaporative cooling of the secondary airflow enhances the system’s ability to handle higher ambient temperatures, extending the range of conditions under which free cooling (using outdoor air) is effective.
Key Features
- No Humidity Increase in Data Center: Unlike direct evaporative cooling, indirect systems keep the data center air dry, avoiding risks to sensitive IT equipment from excess moisture.
- Energy Efficiency: By using evaporation to pre-cool outdoor air, these systems reduce reliance on mechanical refrigeration (e.g., DX or chilled water systems), lowering energy consumption.
- Water Use: Water is only used for evaporation in the secondary airflow, and many systems operate in "dry mode" (no water) during cooler conditions, conserving water compared to traditional cooling towers.
Operational Modes
Indirect adiabatic cooling systems in data centers often operate in multiple modes to optimize efficiency:
- Dry Mode (Free Cooling):
- When outdoor temperatures are low (e.g., below 20°C), the system uses ambient air alone to cool the heat exchanger without water evaporation.
- Fans modulate airflow to meet cooling demands.
- Wet Mode (Adiabatic Cooling):
- During warmer conditions (e.g., 25°C to 35°C), water is introduced to the secondary airflow to enhance cooling capacity via evaporation.
- This mode is activated only when dry cooling is insufficient.
- Hybrid Mode (with Mechanical Cooling):
- In extreme heat (e.g., above 35°C) or high humidity, supplementary mechanical cooling (e.g., DX or chilled water coils) provides additional capacity to maintain temperature setpoints.
Application in Data Centers
Indirect adiabatic cooling systems are widely used in modern data centers due to their balance of efficiency, sustainability, and reliability. Specific applications include:
- Hyperscale Data Centers:
- Large facilities (e.g., those operated by Google, Microsoft, or Amazon) use these systems to manage massive heat loads while minimizing energy and water usage.
- Example: A 500 kW system can cool a data hall with a PUE (Power Usage Effectiveness) as low as 1.05-1.2.
- Colocation Facilities:
- Multi-tenant data centers benefit from the scalability and redundancy of indirect adiabatic systems, ensuring consistent cooling across diverse IT loads.
- Edge Data Centers:
- Smaller, distributed facilities in varying climates use these systems for their adaptability to local weather conditions and lower operational costs.
- Sustainability Goals:
- Data centers aiming to reduce carbon footprints and water usage (e.g., in water-scarce regions) adopt these systems to align with environmental regulations and corporate ESG (Environmental, Social, Governance) targets.
Advantages
- Energy Savings: Can achieve up to 70%-90% energy savings compared to traditional mechanical cooling, especially when combined with free cooling.
- Water Efficiency: Uses significantly less water than cooling towers (up to 95% less in some designs), as water is only employed during peak heat conditions.
- Air Quality: Maintains clean, dry air inside the data center, avoiding contamination from outdoor pollutants or humidity.
- Flexibility: Operates effectively across a wide range of climates, from dry desert regions to temperate zones.
Challenges
- Initial Cost: Higher upfront investment for heat exchangers, fans, and water distribution systems compared to basic air conditioning.
- Maintenance: Requires periodic cleaning of wetted media or heat exchanger surfaces to prevent scaling, corrosion, or bacterial growth (e.g., Legionella).
- Climate Dependency: Less effective in high-humidity environments where the wet-bulb temperature limits evaporative cooling potential.
Real-World Example
- Microsoft Data Centers: Microsoft has implemented indirect adiabatic cooling in several facilities, reporting water savings of millions of liters annually. In a 2022 report, they noted a 6.4 million m³ water usage reduction partly due to such systems.
- Telehouse North Two (London): This facility uses a multi-story indirect adiabatic system, achieving a PUE of 1.16, one of the lowest in the industry.
Conclusion
Indirect adiabatic cooling systems for data centers use evaporative cooling indirectly through a heat exchanger to pre-cool outdoor air, efficiently transferring heat from the data center environment while preserving air quality and reducing resource consumption. They are a cornerstone of modern, sustainable data center design, balancing energy efficiency, water conservation, and operational reliability. For facilities with specific heat loads or climate conditions, these systems can be customized to maximize performance, making them a versatile solution for the growing demands of digital infrastructure.
The counter current heat exchange core used for food drying utilizes the principle of heat conduction to allow high-temperature drying exhaust gas and low-temperature fresh air to flow in a counter current manner inside the core. Heat exchange is carried out through a heat-conducting plate, allowing fresh air to heat up and exhaust gas to cool down, achieving energy recovery and improving the energy utilization efficiency of the drying system. By recovering heat through the heat exchange core, the drying temperature and humidity can be more accurately controlled.
The core frame is generally made of materials such as aluminum zinc coated plate, galvanized plate, or stainless steel plate to meet different environmental requirements and ensure long-term stable operation.
The counterflow design maintains a relatively large temperature difference between the cold and hot air flows throughout the entire heat exchange process, promoting heat transfer, improving heat exchange efficiency, and achieving energy recovery efficiency of over 50%. Widely used in various food drying fields, such as the processing of dried fruits, dried vegetables, dried meat products, dried seafood, and dried grains.
The air handling units on board ships must be equipped with high-quality heat exchangers to provide uninterrupted fresh air. Our air to air heat exchangers are the perfect choice for ship or coastal applications.
The use of air-to-air heat exchangers in ship ventilation systems can not only introduce fresh air, but also recover the energy of the discharged air, preheat or pre cool fresh air, and reduce overall energy consumption. At the same time, it effectively reduces the risk of equipment failure due to high temperatures.
We accurately calculate the heat transfer area, air volume, and other parameters of the required heat exchanger based on the spatial size, ventilation requirements, and heat load of different areas of the ship. A plate fin heat exchanger with a large heat exchange area and high air volume can be selected to ensure efficient heat recovery and air exchange. Consider the operating environment of the ship and choose materials with strong corrosion resistance. We use hydrophilic aluminum foil heat exchange material, which not only has good thermal conductivity, but also effectively resists corrosion from seawater and humid air, extending the service life of the equipment.
Solar inverters generate a large amount of heat during operation. If this heat is not dissipated in a timely manner, the internal temperature of the inverter will continue to rise, leading to a decrease in device performance, shortened lifespan, and even causing malfunctions. Therefore, based on solar inverters with different heat exchangers, we provide you with suitable cooling solutions.
Air cooled heat exchangers use air as a cooling medium and force air to flow over the surface of the heat exchanger through a fan to achieve heat exchange.
Design selection: We determine the size, heat dissipation area, and fan air volume and pressure of the air-cooled heat exchanger based on the power size, heating power, and operating environment of the inverter. Generally speaking, compact plate fin air-cooled heat exchangers can be used for small solar inverters, which have the characteristics of small size and high heat dissipation efficiency; Large inverters can use tube and strip air-cooled heat exchangers, which have a large heat dissipation area and can meet high-power heat dissipation requirements.
Liquid cooled heat exchangers use liquid as the cooling medium, which circulates inside the heat exchanger, absorbs the heat generated by the inverter, and then dissipates the heat to the external environment through the radiator.
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