Heat exchangers are mainly made of materials such as aluminum foil, stainless steel foil, or polymers. When there is a temperature difference between the airflow isolated by aluminum foil and flowing in opposite directions, heat transfer occurs, achieving energy recovery. By using an air to air heat exchanger, the heat in the exhaust can be utilized to preheat the fresh air, thereby achieving the goal of energy conservation. The heat exchanger adopts a unique point surface combination sealed process, which has a long service life, high temperature conductivity, no permeation, and no secondary pollution caused by the permeation of exhaust gas.
The application of cross flow heat exchangers in Indirect Evaporative Cooling (IDEC) systems in data centers is mainly reflected in efficient heat exchange, reducing energy consumption, and improving data center cooling efficiency. Here are its key roles and advantages:
Basic working principle Cross flow heat exchanger is a type of heat exchange device whose structure allows two streams of air to cross each other while maintaining physical isolation. In indirect evaporative cooling systems in data centers, it is typically used for heat exchange between cooling air and outdoor ambient air without direct mixing. The workflow is as follows: The primary air (data center return air) exchanges heat with the secondary air (external ambient air) through one side of the heat exchanger. The secondary air evaporates and cools in the humidification section, reducing its own temperature, and then absorbs heat in the heat exchanger to cool the primary air. After the primary air is cooled down, it is sent back to the data center to cool down the IT equipment. The secondary air is ultimately discharged outdoors without entering the interior of the data center, thus avoiding the risk of pollution.
Advantages in Data Centers (1) Efficient and energy-saving, reducing cooling demand Reduce cooling load: By using cross flow heat exchangers, data centers can utilize external air cooling instead of relying on traditional mechanical refrigeration (such as compressors). Improve PUE (Power Usage Effectiveness): Reduce the operating time of mechanical cooling equipment, lower energy consumption, and make PUE values closer to the ideal state (below 1.2). (2) Completely physically isolated to avoid contamination Cross flow heat exchangers can ensure that outdoor air does not come into direct contact with the air inside the data center, avoiding pollution, dust, or humidity affecting IT equipment. They are suitable for data centers with high air quality requirements. (3) Suitable for various climatic conditions In dry or warm climates, indirect evaporative cooling systems are particularly effective and can significantly reduce the cooling costs of data centers. Even in areas with high humidity, optimizing the design of heat exchangers can improve heat exchange efficiency. (4) Reduce water resource consumption Compared to direct evaporative cooling (DEC), indirect evaporative cooling does not require direct spraying of water into the air of the data center, but rather indirect cooling through a heat exchanger, thus reducing water loss.
Applicable scenarios Cross flow heat exchangers are widely used in the following types of data centers: Hyperscale Data Center: Requires efficient and energy-saving cooling solutions to reduce operating costs. Cloud computing data center: requires high PUE values and seeks more sustainable cooling methods. Edge Data Center: typically located in harsh environments, requiring efficient and low maintenance cooling systems.
Challenge and Optimization Plan Heat exchanger size and efficiency: Larger cross flow heat exchangers can improve heat exchange efficiency, but they also increase the footprint, so optimization design is needed, such as using aluminum or composite material heat exchangers to improve heat exchange efficiency. Scaling and maintenance: Due to humidity changes, heat exchangers may experience scaling issues, requiring regular cleaning and the use of corrosion-resistant coatings to extend their lifespan. Control system optimization: Combined with intelligent control, dynamically adjust the working mode of the heat exchanger based on external environmental temperature, humidity, and data center load conditions to improve system adaptability.
Future Development Trends New efficient heat exchange materials, such as nano coated heat exchangers, further improve heat exchange efficiency. Combined with AI intelligent control system, dynamically adjust the heat exchange according to the real-time load of the data center. Combining liquid cooling technology to further improve heat dissipation efficiency in high-density server rooms.
Cross flow heat exchangers play an important role in the indirect evaporative cooling system of data centers, providing efficient heat transfer, reducing energy consumption, minimizing pollution, and improving equipment reliability. They are currently one of the important technologies in the field of data center cooling, especially suitable for large-scale, high-efficiency data centers.
1.Heat from industrial waste gas with exhaust air temperature below 200°C can be recovered to heat fresh air
2. The structure of heat recycle box can be designed according to the site situation.
3. There is no feeding or exhaust fan in this structure.
4. The heat recovery efficiency in this table is equal to the air supply and exhaust volume. You can consult our company for heat recovery efficiency with different air supply and exhaust volume.
5. The heat recovery box can be made into floor type, ceiling type and other structural types (general air volume 100000m%/h to scare).
Adequate indoor air quality(IAQ)involves many factors depending on the local situation and climate.Health issues like breathing problems can arise from air containing dust,pollen,or other contaminants.A poor indoor environment can also damage buildings.
Commercial(non-residential)air handling units tend to be larger units designed for buildings like offices,hotels,and airports.The challenge is to achieve a comfortable IAQ with as little energy input as possible.This means that pressure drop should be low(less fan power is needed)and thermal/humidity efficiency high(less energy consumed for heating/cooling/humidity control).
Depending on the geographical region,the primary purpose of the heat exchanger shifts between heating or cooling(and maybe also dehumidifying)the outdoor air before it enters the building.
The air handling unit(AHU)is at the center of a ventilation system.At a minimum,an AHU includes one or several fans in each air channel to move the air through the unit.Filters on either side remove dust,pollen,etc.,and protect the fans.Finally,a heat exchanger transfers the required heat or humidity from the exhaust air to the supply air.
Implementing an air-to-air heat exchanger is an excellent way to utilize what is usually considered waste heat.An air-to-air heat exchanger will use the temperature difference between the supply and exhaust air to increase the system’s efficiency.There are two types of air-to-air heat exchangers:rotary and plate heat exchangers.
The type and exact configuration depends on the application.Both types are made of aluminum,which has excellent properties such as efficient heat transfer capabilities and an extraordinarily long life span.We offers numerous design variables and options for each product,enabling perfect fit and performance in every AHU.
Modern data centers are remarkably technologically complex, and keeping them running safely and efficiently requires continual close monitoring and management.
Maintaining the correct temperature is among the most important tasks faced by data center managers. Should the temperature and humidity rise to excessive levels inside the data center, condensation can start forming, damaging the machines within. This can cause massive damage and disruption, so it must be avoided at all costs. Fortunately, various technologies are on hand that can help keep data center temperatures at the right level.
There are numerous ways to cool a data center. Indirect air cooling uses external air, but by including an air-to-air heat exchanger, the outside air is kept in a separate loop, providing cooling without entering the server room.
Indirect cooling methods benefit by not contaminating the inside air with outdoor air pollutants and humidity. A heat exchanger keeps both airstreams separated while transferring the heat from the inside to the outside of the data center building. Consequently, the ambient and indoor air never mix.
Dry cooling is usually sufficient if the data center is located in a consistently low-temperature area, meaning no water is involved. However, by spraying water on the ambient air side of the heat exchanger, an evaporative effect is achieved, resulting in a lower indoor air temperature. This method is called indirect evaporative cooling (IEC).
Ideally suited for warm, dry climates, IEC provides excellent cooling potential with low operational- and first-cost. Ambient temperature reductions of 6-8 °C (10-15 °F) are typical in summer conditions. IEC provides up to 28% in energy savings compared to conventional free cooling and 52% to air-cooled Free Cooling alternatives.
Evaporative cooling requires a plate heat exchanger that balances high efficiency with low pressure drop, offers solid corrosion protection, and reliable water tightness. Cross-flow heat exchangers meet all these requirements while providing outstanding cooling capacity.
Our crossflow heat exchangers, especially with evaporative cooling technology, provide an efficient, low-cost, and environmentally friendly alternative to traditional cooling methods.
Fully automatic non partition air filter production line
The fully automatic non partition air filter production line is a highly automated production system, typically used to produce high-performance air filters, widely used in industrial, commercial, and household air purification equipment. Its core feature is the use of a non partition design to improve the filtration efficiency of the air filter and reduce the resistance of air flow.
Main features: Partition free design: Traditional air filters typically use partitions to separate the filter material layer, while partition free design can effectively reduce obstacles to air flow, thereby improving filtration efficiency and reducing energy consumption. Fully automated operation: From raw material cutting, filter material assembly, to finished product packaging, the production line achieves full automation, reduces manual intervention, and improves production efficiency and consistency. High precision control system: By integrating advanced automation control systems and sensors, it ensures precise control of the production process and achieves high-quality filter products. Fast switching and flexibility: The production line supports the production of filters of different specifications and types, and can quickly switch production modes to meet the needs of different customers. Efficient production capacity: Design efficient processes and modular systems that can meet large-scale production requirements and ensure stable product quality.
The exhaust gas generated by paper mills during the production process has the characteristics of high temperature, high humidity, and foul odor. If directly discharged, it not only pollutes the environment but also wastes a large amount of heat energy. To solve this problem, our company has developed a whitening and defogging heat recovery device for drying waste gas in paper mills.
working principle: Heat exchange principle: Using the principle of plate heat exchangers, heat is exchanged through a series of parallel metal plates. High temperature exhaust gas flows through one side of the plate, while fresh air flows through the other side, transferring heat through the plate wall to achieve waste heat recovery. Cooling and heating process: Firstly, the high-temperature exhaust gas is cooled to a temperature close to the ambient temperature, and then heated by a reheater to make the exhaust gas temperature higher than the ambient temperature, thereby eliminating the phenomenon of white mist. Technical advantages: Efficient and energy-saving: By recovering waste heat from exhaust gas, energy consumption and operating costs are significantly reduced. Environmental protection and emission reduction: effectively removing moisture and odorous components from exhaust gas, reducing pollution to the environment. Compact structure: small size, light weight, easy installation, and occupies less space. Application scenarios: Paper industry: Recovering heat during the paper drying process to preheat the air entering the dryer, improve drying efficiency, and reduce fuel consumption. Food processing industry: Recycling waste heat from the drying process of grains, vegetables, fruits, etc., to preheat fresh air and improve drying efficiency. Chemical industry: Recycling high-temperature waste gas from the drying process of chemical products for heating other process gases or air. Textile industry: used for the recovery of waste heat during the drying process of textiles, improving drying efficiency and energy-saving effects.
With the further development of China's economy, the use of green energy will be more and more extensive. Heat pump dehumidification dryers with plate type obvious heat recovery function have developed rapidly in recent years and have been widely used in the Yangtze River basin, southwest China and South China.
The unit using the inverse cano principle at the same time, combined with efficient heat recovery technology, in the whole drying dehumidifying process, through the duct the wet air within the chamber connected to the host using the sensible heat plate heat collector recovery of the sensible heat and latent heat of hot and humid air, thermal recycling, greatly improve the performance of the host, improve the drying speed and material quality. The waste heat can not only improve the performance of the unit, but also reduce the thermal pollution to the environment and alleviate the urban heat island effect.
The heat pump drying heat recovery system is not only used in the mud drying system, but also widely used in many other drying industries. It has the characteristics of good drying quality and high degree of automation, and is the best choice product for energy saving, green and environmental protection in the modern drying industry.
Heat pump dryers with and without heat recovery working principle
When the heat pump dryer dries the air, the air forms a closed cycle between the drying chamber and the equipment. The evaporator's heat absorption function is used to cool and dehumidify the hot and humid air, and the condenser's heat release function is used to heat the dry cold air, so as to achieve the effect of cycle dehumidification and drying.
The main difference between heat recovery function and heat pump dryers without heat recovery function lies in the different air circulation modes. The former is equipped with plate type sensible heat exchanger, which plays the function of pre-cooling and preheating in the air circulation process, reducing the load of compressor operation and achieving the purpose of energy saving.
Heat pump drying system operation mode
Energy saving analysis of heat recovery
Taking a heat pump dryer as an example, the air temperature of drying is designed to be 65℃, the relative humidity is 30%, the circulating air temperature is 65℃, the temperature before passing through the evaporator is 65℃, and the temperature after evaporation cooling is 35℃. The condenser needs to heat the air of 35℃ to 65℃ before it can be used.
After matching with BXB500-400-3.5 heat exchanger, 35℃ return air absorbs heat from exhaust air after passing through plate heat exchanger, and the temperature rises to 46.6℃. The condenser only needs to heat the air from 46.6℃ to 65℃ to meet the use requirements, greatly reducing the load of evaporator and condenser, thus reducing the power of the whole machine, achieving the purpose of energy saving.
Energy saving analysis of heat recovery
Selection and economic calculation
We are very glad to show you the calculation and selection software of plate heat exchanger jointly developed by us and Tsinghua University. If you need, please contact us!
The principle of using a condenser for dehumidification to eliminate white smoke is mainly based on the physical changes of water vapor in the flue gas. The condenser cools the flue gas with low-temperature water or air, gradually reducing its temperature, and the water vapor inside begins to condense into small water droplets. These small water droplets gather inside the condenser and eventually form liquid water, which is then removed through drainage pipes. Dehumidification through a condenser is an effective technical means to eliminate white smoke. It can not only reduce visual pollution, but also help improve the operational efficiency and energy-saving effect of environmental protection equipment. We can provide you with a suitable dehumidification solution for flue gas, which is both economical and environmentally friendly. Welcome to consult us via email.
Industrial flue gas desulfurization equipment with heat exchange technology to reduce the water vapor content in flue gas, thereby eliminating the white smoke plume generated during chimney emissions. The following are several common methods for flue gas whitening:
Flue gas heating technology: The desulfurized wet flue gas is heat exchanged with industrial high-temperature flue gas through a heat exchanger to increase the emission temperature of the flue gas, thereby reducing the relative humidity of the flue gas and avoiding the condensation of water vapor to form white smoke. This method can effectively reduce the generation of white smoke, but it requires a certain amount of energy to heat the smoke.
Flue gas condensation technology: First, partially condense the water vapor in the saturated flue gas, and then heat the flue gas. This method reduces the formation of white smoke by lowering the moisture content in the flue gas, while also recovering some water resources.
MGGH technology: Install flue gas cooling heat exchangers before and after electrostatic precipitator, install flue gas heating heat exchangers after desulfurization, and set up a heat medium water circulation system. This technology extracts the heat from the original smoke to heat the clean smoke, which usually needs to be raised to 75-80 ℃ to avoid the production of white smoke.
In summary, these methods each have their own advantages and disadvantages, and are suitable for different industrial environments and needs. When selecting specific flue gas desulfurization technologies, factors such as process conditions, waste heat resources, and investment requirements need to be considered. Welcome to consult us via email.
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