During the food processing, steaming, baking and other processes generate a large amount of humid and hot air. If directly discharged, it will cause energy waste and may affect the surrounding environment. In the ventilation system of food processing plants, plate heat exchangers can recover heat from humid and hot exhaust air for preheating fresh air or heating production water. For example, in the bread baking workshop, plate heat exchangers are used to transfer the heat from the exhaust air to the fresh air entering the workshop, which not only ensures air circulation in the workshop but also reduces the energy consumption of heating the fresh air. In addition, in the ventilation of food cold storage, plate heat exchangers can prevent external hot air from directly entering, reduce the loss of cold storage capacity, maintain a low temperature environment in the cold storage, and reduce the operating costs of the refrigeration system.
Why do chemical workshops need to install heat exchangers
Plate heat exchangers can be used in the ventilation system of chemical workshops to cool and reduce the temperature of high-temperature exhaust, transfer heat to fresh air, and achieve energy recycling. For example, in petrochemical plants, the high-temperature gas generated by the reaction is cooled by a plate heat exchanger and then subjected to subsequent treatment, which not only improves energy utilization efficiency but also protects subsequent equipment. At the same time, for the possible corrosive gases in the chemical workshop, corrosion-resistant plate heat exchangers can be used to ensure stable equipment operation and maintain good ventilation and air quality in the workshop.
What are the uses of heat exchangers in the metallurgical industry
In production processes such as steel and non-ferrous metal smelting, a large amount of high-temperature flue gas is generated. These fumes not only carry dust and harmful gases, but also contain considerable waste heat. Installing plate heat exchangers at the flue gas emission channel can preheat the fresh air with the help of high-temperature flue gas, achieving the effect of heat recovery. Taking the blast furnace ironmaking workshop as an example, with the help of plate heat exchangers, the heat of high-temperature flue gas can be transferred to the cold air sent into the workshop. On the one hand, this measure can reduce the temperature of flue gas emissions and alleviate the load on subsequent environmental treatment equipment; On the other hand, preheated fresh air can optimize the working environment in the workshop and reduce heating energy consumption. In addition, in the local ventilation system of the metallurgical workshop, plate heat exchangers can also carry out heat recovery work for exhaust containing oil stains or metal dust, achieving energy-saving goals while preventing the spread of pollutants.
Why do hotels install plate heat exchangers？
In the guest room area, plate heat exchangers can ensure the gentle supply of fresh air, avoiding the impact of large temperature differences between the fresh air and the indoor environment on guests' rest, while maintaining fresh air and enhancing the accommodation experience. In densely populated areas such as banquet halls and conference rooms in hotels, plate heat exchangers can quickly remove polluted air and replenish fresh air that has been heated, maintaining good air quality and temperature and humidity to meet the needs of large-scale events and conferences. In addition, in the kitchen area of the hotel, plate heat exchangers combined with oil fume purification equipment not only remove oil fume but also recover heat, reduce energy consumption, and improve the working environment of the kitchen.
How to use plate heat exchangers in the ventilation system of office buildings
Plate heat exchangers are used in the ventilation system of office buildings, which can introduce fresh air that has undergone heat exchange treatment when the outdoor temperature is suitable in spring and autumn, achieving natural ventilation and reducing the frequency of air conditioning use; In winter and summer, preheat or pre cool the fresh air to reduce air conditioning load and create a comfortable office environment. Moreover, plate heat exchangers can also be combined with fresh air purification devices to filter pollutants in outdoor air, providing employees with healthy and clean air and improving work efficiency.
How to reduce energy consumption in mall air conditioning systems
Plate heat exchangers, with their efficient energy recovery mechanism, can transfer heat or cold during the exchange process between exhaust and fresh air. According to actual data statistics, after installing plate heat exchangers, the energy consumption of air conditioning systems in shopping malls can be reduced by 20% -30%, greatly reducing electricity and fuel consumption, lowering operating costs, and responding to the national call for energy conservation and emission reduction, helping to achieve the "dual carbon" goal.
The necessity of heat exchangers in large shopping malls
The mall is densely populated, with obvious heat and moisture dissipation from the human body, and the display area of goods is prone to produce odors. If the ventilation system only provides simple air exchange, it is difficult to ensure the temperature and humidity balance between fresh air and indoor air. Plate heat exchangers can perform pre cooling or preheating treatment on fresh air, making the temperature of the fresh air close to the indoor temperature and avoiding discomfort for customers and employees caused by overcooling or overheating of the fresh air. At the same time, continuous and stable ventilation combined with efficient heat exchange can quickly remove indoor polluted air and odors, always keeping the air fresh, creating a comfortable shopping environment for customers, extending their stay time, and also creating good working conditions for employees, improving work efficiency.
The impact of heat exchangers on batteries
Preventing battery overheating: Excessive temperature can accelerate chemical reactions inside the battery, leading to capacity degradation and shortened lifespan. The heat exchanger indirectly prevents the battery from overheating during charging by cooling the charging pile. For example, when the ambient temperature is high or fast charging is performed, the heat generated by the charging pile is relatively high. The heat exchanger can effectively reduce the temperature of the charging current and voltage, reduce the heat conducted to the battery, and keep the battery charging within the appropriate temperature range, thereby extending the battery life.
Reduce the loss of chemical substances inside the battery: Excessive temperature can cause the electrolyte inside the battery to evaporate, electrode materials to age, and reduce the performance and lifespan of the battery. The heat exchanger controls the temperature of the charging environment, which helps to slow down the rate of chemical loss inside the battery, maintain the chemical balance inside the battery, extend the cycle life of the battery, and reduce the cost and frequency of battery replacement due to premature aging.
Does the heat exchanger affect the charging efficiency？
Heat exchangers play a crucial role in electric vehicle charging stations, as they control the temperature during the charging process and have a significant impact on charging efficiency and battery life, as follows:
The impact on charging efficiency
Optimize charging power: When charging electric vehicles, the power electronic components of the charging station generate heat. If the heat is not dissipated in a timely manner, the temperature of the components will rise, which will lead to a decrease in their performance and even trigger the overheating protection mechanism, reducing the charging power. The heat exchanger can effectively dissipate this heat, keeping the power electronic components within a suitable operating temperature range, ensuring that the charging station always charges the electric vehicle at a high power, shortening the charging time, and improving charging efficiency.
Stable charging voltage and current: Temperature fluctuations can affect the stability of the output voltage and current of the charging station. The heat exchanger maintains stable internal temperature of the charging station, which helps to ensure the accuracy of output voltage and current, making the charging process smoother. Stable voltage and current can make the battery management system of electric vehicles work more efficiently, improve charging efficiency, and avoid charging interruptions or efficiency reductions caused by voltage and current fluctuations.
Selection of heat dissipation for electric vehicle charging piles
The selection and application of heat exchangers are crucial in the liquid cooling system of electric vehicle charging stations. The following are several common types and applications of heat exchangers:
plate heat exchanger
Working principle: It is composed of a series of metal sheets with certain ripple shapes stacked together, and heat exchange between the cooling liquid and the external medium is achieved through the flow channels between the sheets.
Application scenario: Suitable for charging pile liquid cooling systems with high space requirements and large flow rates. It has a compact structure and high heat transfer efficiency, and can flexibly combine the number of plates and flow channel forms according to the power and heat dissipation requirements of the charging pile.
tube heat exchanger
Working principle: The tube bundle is composed of pipes, with cooling liquid flowing inside the pipes and external medium flowing outside the pipes, exchanging heat through the pipe walls.
Application scenario: Commonly used for charging stations with high reliability requirements and harsh working environments. Its structure is sturdy, resistant to high voltage and high temperature, and not easy to leak. It is suitable for some occasions with strict safety requirements, such as outdoor high-power charging piles.
microchannel heat exchanger
Working principle: Adopting microchannel structure increases the heat transfer area and improves the heat transfer efficiency. The coolant flows within the microchannel and efficiently exchanges heat with external air or other cooling media.
Application scenario: Especially suitable for electric vehicle charging stations that require high heat dissipation performance and space. It has a small volume and light weight, and can achieve efficient heat dissipation in a limited space. It is commonly used in compact charging stations or high-power charging modules with strict heat dissipation requirements.