Applications

indirect adiabatic cooling systems for the data centers use.

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.

Counter current heat exchange core for food drying

Mar 31,2025 Leave a comment Counter current heat exchange, heat exchange core for food drying

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.

Heat exchangers for ship ventilation

Mar 28,2025 Leave a comment .Heat exchangers for ship ventilation

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.

Heat exchanger for cooling solar inverters

Mar 28,2025 Leave a comment cooling solar inverters, heat exchanger

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.
If you have any needs, please contact us immediately.

Heat dissipation principle of wind turbine cooling system

Mar 28,2025 Leave a comment Plate Heat Exchanger, Wind turbine cooling

During the operation of wind turbines, the heat generated by energy conversion and solar radiation needs to be dissipated to ensure the expected lifespan of the components inside the nacelle. We have developed a customized wind turbine cooling system for you, which effectively dissipates heat and keeps the equipment within its normal operating temperature range.
Radiators are typically in close contact with the heating components of wind turbines, transferring heat to the radiator body through molecular vibrations in the solid medium. Due to the excellent thermal conductivity of metals, they can quickly transfer heat from the heat source to the surface of the radiator to achieve cooling purposes.

We design a reasonable radiator structure for you, such as a plate fin radiator, which has high heat dissipation efficiency and compact structure, suitable for wind turbines with limited space. Welcome to consult us

Plate heat exchangers for waste heat recovery in the cement kiln industry

Mar 28,2025 Leave a comment Plate heat exchangers

The cement industry is a high energy consuming industry, and cement kilns generate a large amount of waste heat during the production process. According to statistics, the waste heat from cement kilns accounts for 30% to 60% of the total energy consumption in cement production. Recycling and utilizing this waste heat can help save energy and reduce emissions, and promote the sustainable development of the cement industry. Among numerous waste heat recovery equipment, our plate heat exchanger has been widely used due to its efficient heat transfer performance.

Product Structure
A plate heat exchanger is composed of a series of metal plates with certain corrugated shapes stacked together, forming narrow and winding channels between the plates. The edges of adjacent plates are sealed with sealing gaskets to ensure that the medium does not leak. Suitable materials can be selected based on the characteristics of different media and working temperatures.

Technical principles
Plate heat exchangers are based on the principle of wall to wall heat transfer, where two fluids of different temperatures flow on both sides of the plate and transfer heat through the plate. Usually, the counterflow heat transfer method is used, where two fluids flow in opposite directions inside the heat exchanger. This heat exchange method maintains a large temperature difference between the hot and cold fluids throughout the entire heat exchange process, thereby improving heat exchange efficiency and maximizing the recovery of waste heat. Compared with traditional shell and tube heat exchangers, the heat transfer coefficient of plate heat exchangers can be increased by 3-5 times.

Waste heat recovery plan
The high-temperature exhaust gas discharged from the cement kiln first enters the waste heat collection device and is transported to the plate heat exchanger through pipelines. In order to prevent dust in the exhaust gas from causing wear and blockage of the heat exchanger, dust removal equipment is usually installed before entering the heat exchanger. In the plate heat exchanger, high-temperature exhaust gas exchanges heat with low-temperature water or other heat media. After absorbing heat from exhaust gas, the temperature of the heat medium increases, which can be used to produce hot water, steam, or provide thermal energy for other processes. After heat exchange, the temperature of the exhaust gas decreases and meets the emission standards before being discharged into the atmosphere.

Drying tower heat recovery heat exchanger

Mar 24,2025 Leave a comment

The drying tower heat recovery heat exchanger is mainly used in the drying process of industries such as chemical, food, and pharmaceutical. Its purpose is to recover the heat from the drying exhaust gas, improve energy utilization efficiency, and reduce production costs.
Chemical industry: In the production process of chemical products, many processes require drying of materials, such as plastic pellets, rubber products, fertilizers, etc. The heat recovery heat exchanger of the drying tower can be installed in the exhaust emission system of the drying tower to recover the heat in the exhaust gas, which is used to preheat the air or materials entering the drying tower, thereby improving the drying efficiency and reducing energy consumption.
Food industry: In the process of food processing, such as grain drying, fruit drying, milk powder production, etc., the heat recovery heat exchanger in the drying tower can recover and utilize the heat in the drying exhaust gas, which not only saves energy but also reduces thermal pollution to the environment. Meanwhile, the recovered heat can be used for other processes in the food processing, such as preheating raw materials and sterilization.
Pharmaceutical industry: In drug production, high drying requirements are placed on drug raw materials and intermediates. The drying tower heat recovery heat exchanger can recover heat from the drying exhaust while ensuring drug quality, reducing energy consumption during the drying process and improving production efficiency.
Our drying tower heat recovery heat exchanger usually adopts a counter current plate heat exchanger, using hydrophilic aluminum foil material with good thermal conductivity and corrosion resistance. We will also optimize the design scheme of the heat exchanger for you, further improving the heat recovery efficiency and reducing operating costs.

Hydrophilic aluminum foil heat exchanger for offshore wind power

Mar 23,2025 Leave a comment Hydrophilic aluminum foil heat exchanger

At present, most offshore wind farms use heat exchangers that not only meet basic heat dissipation needs, but also suffer from certain energy waste. The selection of some heat exchangers is too large, resulting in low fluid flow rate, decreased heat transfer efficiency, and increased pump power consumption during low load operation. Due to the complex and ever-changing marine environment, heat exchangers are susceptible to corrosion, scaling, and other issues, further reducing heat transfer performance and increasing energy consumption.

Energy saving scheme design, optimizing heat exchanger selection
We will use advanced heat load calculation software to accurately calculate the required heat transfer based on the heating power of wind turbines under different operating conditions, combined with environmental conditions such as seawater temperature, air humidity, etc., to ensure that the selection of heat exchangers matches actual needs and avoid selecting too large or too small. Select a plate type with high heat transfer coefficient and low flow resistance based on the heat dissipation characteristics of offshore wind power. Improve heat exchange efficiency while reducing pump power consumption. Using hydrophilic aluminum foil, a new material with corrosion resistance, high strength, and good thermal conductivity, to manufacture plates can not only extend the service life of heat exchangers, reduce downtime and energy waste caused by corrosion and maintenance, but also improve heat transfer efficiency to a certain extent.

Application of Plate Heat Exchanger in Industrial Ventilation Field

Mar 16,2025 Leave a comment Industrial Dehumidification, Plate Heat Exchanger

Plate heat exchangers are mainly used for air heat exchange in the industrial ventilation industry to achieve functions such as air preheating, cooling, or energy recovery in ventilation systems. The following are their solutions and technical principles:

Solution
Air air heat exchange: In some industrial places, such as large factories and workshops, it is necessary to preheat or cool the fresh air in the ventilation system. Plate heat exchangers can exchange heat between the discharged hot or cold air and the incoming fresh air, allowing the fresh air to reach a certain temperature before entering the room, thereby saving energy and improving the comfort of the indoor environment.
Energy recovery: For some industrial processes that generate a large amount of waste heat, such as metallurgy, chemical industry, etc., plate heat exchangers can be used to recover heat energy from exhaust gas and transfer it to fresh air or other media that need to be heated in the ventilation system. For example, high-temperature exhaust gas is heat exchanged with air in the ventilation system through a plate heat exchanger, and the air is heated and used for heating or other process in the workshop.
Technical principles
Structure and heat transfer method: Plate heat exchangers are composed of a series of metal plates with corrugated shapes, forming narrow channels between the plates. Cold and hot fluids flow in adjacent channels. When hot and cold fluids pass through a plate, heat is transferred through the plate. Due to the large surface area and good thermal conductivity of the plate, efficient heat exchange can occur between the hot and cold fluids.

How to choose a suitable heat exchanger in the field of food drying

Mar 16,2025 Leave a comment rotary heat exchanger

The rotary heat exchanger, with its advanced technical principles and carefully designed solutions, has brought a new and efficient, energy-saving, and high-quality drying experience to the field of food drying, and is becoming the best choice for many food production enterprises to enhance their competitiveness.

Selection design: Based on the specific needs of food drying, such as the type of food to be dried, production scale, drying process requirements, etc., accurately select the appropriate specifications of rotary heat exchangers. For example, for large-scale bread drying production lines, it is necessary to use large rotary heat exchangers with high processing air volume and high heat exchange efficiency; For small nut drying enterprises, small and compact heat exchangers are more suitable.
System integration: Cleverly integrate the rotary heat exchanger into the food drying system. Reasonably arrange heat exchangers between the exhaust gas discharge outlet and the fresh air inlet of the drying equipment to ensure that the exhaust gas can flow smoothly through the hot side of the impeller and the fresh air flows through the cold side. At the same time, through an intelligent control system, the speed of the rotary wheel and the flow rates of hot and cold fluids are accurately adjusted to meet the needs of different drying stages, ensuring the stability and efficiency of the drying process.
Energy saving and efficiency improvement: By recovering the heat from exhaust gas, the energy consumption during the drying process can be significantly reduced, reducing the use of fuel or electricity, lowering production costs, while improving drying efficiency and increasing output.
Improving quality: Stable drying temperature and humidity control helps ensure even drying of food, avoiding excessive or insufficient drying, enhancing the quality and taste of food, and reducing the rate of defective products.
Environmental sustainability: While reducing energy consumption, it also reduces the impact of exhaust emissions on the environment, which is in line with the production concept of green environmental protection.

Category Applications