An air heat exchanger is a heat transfer device that uses air as a cooling or heating medium for process fluids and gases. It is widely used in the oil and gas, petrochemical, power, chemical, natural gas, and other industrial systems requiring cooling that is independent of a water source.
United Heat Exchangers designs and manufactures air heat exchanger systems to specific operational requirements, with the ability to customize materials, dimensions, tube configurations, fins, and fan systems.
What is an Air Heat Exchanger?
An air heat exchanger is a heat exchange device in which heat from the process fluid is transferred through the tube walls to the surrounding air.
Air can be introduced across the heat exchange surface by:
In many industrial systems, air heat exchangers are used as an alternative to water cooling systems when water resources are limited, water treatment costs are high, or there is a need to reduce reliance on water cooling systems.
Structure of an Air Heat Exchanger
An industrial air-heat exchanger system typically includes the following main components:
1. Fried Tubes
The finned heat pipes increase the contact area between the pipe surface and the air. This is a crucial component that directly affects heat transfer efficiency.
2. Tube Bundle
A tube bundle contains the fluid that needs to be cooled or heated. The tube bundle configuration is designed based on flow rate, temperature, pressure, and heat transfer requirements.
3. Header Box
The header box distributes the refrigerant into and out of the tubes in the tube bundle.
4. Fans
The fan creates airflow through the vane-filled ducts. The system can utilize axial fans in either a forced draft or induced draft configuration.
5. Fan Guards
Fan protection and safety support components for operation in industrial environments.
6. Support Structure
The steel structure supports the tube bundle, fan, motor, and related components.
Operating principle
The operating principle of an Air Heat Exchanger is relatively simple.
The hot refrigerant enters the tube bundle through the header. Heat from the refrigerant is transferred through the tube walls and fins to the surrounding air.
The fan creates a flow of air across the surface of the finned tubes. The air absorbs heat and escapes, while the fluid inside the tubes is cooled to the required temperature.
The process can be described as follows:
Hot fluid → Tube bundle → Fitted tubes → Air → Heat dissipation into the environment
Actual performance depends on the refrigerant flow rate, inlet and outlet temperatures, ambient temperature, heat transfer area, air velocity, and fin design.
Forced Draft and Induced Draft Air Cooler
Forced Draft Air Heat Exchanger
In the forced draft configuration, the fan is positioned below the tube bundle and pushes air across the heat exchange surface.
Advantage:
In the induced draft configuration, the fan is positioned above the tube bundle and draws air across the heat exchange surface.
Advantage:
The choice between forced draft and induced draft depends on operating conditions, plant layout, ambient temperature, and design requirements.
Advantages of Air Heat Exchanger
No coolant required.
Air heat exchangers use air instead of water as a coolant, reducing reliance on industrial water sources.
Reduce water consumption.
This is a significant advantage for plants operating in areas with limited water resources.
Suitable for industrial environments
The device can be designed for varying temperature, pressure, and operating environmental conditions.
Reduce water-related problems.
Because it doesn't use water as a coolant, the system avoids many problems related to scale buildup, corrosion, and coolant treatment.
Custom design
Air heat exchangers can be custom-designed to meet specific requirements regarding heat capacity, flow rate, temperature, pressure, materials, and installation space.
Applications of Air Heat Exchanger
Air Heat Exchangers are used in many industries, including:
Common applications include cooling oil, gas, water, condensate, and other process fluid or gas streams.
Air Cooled Heat Exchanger for the oil and gas and petrochemical industries.
In oil refineries and petrochemical plants, air-cooled heat exchangers are commonly used to cool process streams before or after treatment stages.
The device can be designed to meet the following requirements:
The design needs to consider thermal, mechanical, and environmental factors simultaneously to ensure performance and reliability during operation.
Materials used
Depending on the fluid and operating conditions, air heat exchangers can be constructed from a variety of materials, such as:
The materials for the tubes, fins, and headers are selected based on temperature, pressure, corrosiveness of the fluid, and design requirements.
Custom Air Heat Exchanger Design
Each heat exchange system has different operating conditions. Therefore, the Air Heat Exchanger needs to be designed based on the actual data of the project.
Key parameters include:
United Heat Exchangers can design and manufacture Air Heat Exchangers / Air Cooled Heat Exchangers to meet the specific technical requirements of each project.
Standards and technical specifications
Air Heat Exchanger designs for industrial applications can be implemented according to appropriate technical standards and requirements, including API 661 , ASME, and related standards depending on the project scope.
Thermal and mechanical analysis is performed based on operating conditions and design requirements to determine the appropriate tube bundle configuration, heat transfer area, materials, and fan system.
Why choose United Heat Exchangers?
United Heat Exchangers offers industrial heat exchange solutions with the following capabilities:
United Heat Exchangers designs and manufactures air heat exchanger systems to specific operational requirements, with the ability to customize materials, dimensions, tube configurations, fins, and fan systems.
What is an Air Heat Exchanger?
An air heat exchanger is a heat exchange device in which heat from the process fluid is transferred through the tube walls to the surrounding air.
Air can be introduced across the heat exchange surface by:
- Forced Draft
- Induced Draft Exhaust Fan
- Natural convection , depending on the design and application requirements.
In many industrial systems, air heat exchangers are used as an alternative to water cooling systems when water resources are limited, water treatment costs are high, or there is a need to reduce reliance on water cooling systems.
Structure of an Air Heat Exchanger
An industrial air-heat exchanger system typically includes the following main components:
1. Fried Tubes
The finned heat pipes increase the contact area between the pipe surface and the air. This is a crucial component that directly affects heat transfer efficiency.
2. Tube Bundle
A tube bundle contains the fluid that needs to be cooled or heated. The tube bundle configuration is designed based on flow rate, temperature, pressure, and heat transfer requirements.
3. Header Box
The header box distributes the refrigerant into and out of the tubes in the tube bundle.
4. Fans
The fan creates airflow through the vane-filled ducts. The system can utilize axial fans in either a forced draft or induced draft configuration.
5. Fan Guards
Fan protection and safety support components for operation in industrial environments.
6. Support Structure
The steel structure supports the tube bundle, fan, motor, and related components.
Operating principle
The operating principle of an Air Heat Exchanger is relatively simple.
The hot refrigerant enters the tube bundle through the header. Heat from the refrigerant is transferred through the tube walls and fins to the surrounding air.
The fan creates a flow of air across the surface of the finned tubes. The air absorbs heat and escapes, while the fluid inside the tubes is cooled to the required temperature.
The process can be described as follows:
Hot fluid → Tube bundle → Fitted tubes → Air → Heat dissipation into the environment
Actual performance depends on the refrigerant flow rate, inlet and outlet temperatures, ambient temperature, heat transfer area, air velocity, and fin design.
Forced Draft and Induced Draft Air Cooler
Forced Draft Air Heat Exchanger
In the forced draft configuration, the fan is positioned below the tube bundle and pushes air across the heat exchange surface.
Advantage:
- Easy access to the fan and motor for maintenance.
- The structure is relatively simple.
- Convenient for equipment inspection.
- Suitable for a wide range of industrial applications.
In the induced draft configuration, the fan is positioned above the tube bundle and draws air across the heat exchange surface.
Advantage:
- The air distribution is relatively even.
- Reduces the likelihood of hot air returning to the intake area.
- Suitable for systems requiring precise airflow control.
- This can help limit the impact of environmental conditions on cooling performance.
The choice between forced draft and induced draft depends on operating conditions, plant layout, ambient temperature, and design requirements.
Advantages of Air Heat Exchanger
No coolant required.
Air heat exchangers use air instead of water as a coolant, reducing reliance on industrial water sources.
Reduce water consumption.
This is a significant advantage for plants operating in areas with limited water resources.
Suitable for industrial environments
The device can be designed for varying temperature, pressure, and operating environmental conditions.
Reduce water-related problems.
Because it doesn't use water as a coolant, the system avoids many problems related to scale buildup, corrosion, and coolant treatment.
Custom design
Air heat exchangers can be custom-designed to meet specific requirements regarding heat capacity, flow rate, temperature, pressure, materials, and installation space.
Applications of Air Heat Exchanger
Air Heat Exchangers are used in many industries, including:
- oil refinery
- Oil and gas industry
- petrochemical plant
- Power plant
- Chemical plant
- Natural gas processing
- Fertilizer plant
- Maritime industry
- Air treatment system
- Heavy industrial plant
Common applications include cooling oil, gas, water, condensate, and other process fluid or gas streams.
Air Cooled Heat Exchanger for the oil and gas and petrochemical industries.
In oil refineries and petrochemical plants, air-cooled heat exchangers are commonly used to cool process streams before or after treatment stages.
The device can be designed to meet the following requirements:
- High temperature
- High pressure
- Corrosive environment
- Hydrocarbon stream
- Technological gases
- Condensate
- Process oil
The design needs to consider thermal, mechanical, and environmental factors simultaneously to ensure performance and reliability during operation.
Materials used
Depending on the fluid and operating conditions, air heat exchangers can be constructed from a variety of materials, such as:
- Carbon steel
- Stainless steel
- 304/304L stainless steel
- 316/316L stainless steel
- Duplex stainless steel
- Special alloys upon request.
The materials for the tubes, fins, and headers are selected based on temperature, pressure, corrosiveness of the fluid, and design requirements.
Custom Air Heat Exchanger Design
Each heat exchange system has different operating conditions. Therefore, the Air Heat Exchanger needs to be designed based on the actual data of the project.
Key parameters include:
- Fluid flow rate
- Inlet temperature
- Required output temperature
- Operating pressure
- Type of refrigerant
- Ambient temperature
- Installation height
- Material requirements
- Installation area
- Fan requirements
- Mechanical design conditions
United Heat Exchangers can design and manufacture Air Heat Exchangers / Air Cooled Heat Exchangers to meet the specific technical requirements of each project.
Standards and technical specifications
Air Heat Exchanger designs for industrial applications can be implemented according to appropriate technical standards and requirements, including API 661 , ASME, and related standards depending on the project scope.
Thermal and mechanical analysis is performed based on operating conditions and design requirements to determine the appropriate tube bundle configuration, heat transfer area, materials, and fan system.
Why choose United Heat Exchangers?
United Heat Exchangers offers industrial heat exchange solutions with the following capabilities:
- Project-based design
- Manufacturing industrial equipment
- Material selection based on the medium
- Tube bundle and finished tube design
- Configure forced draft or induced draft
- Serving oil and gas, petrochemical, power, and chemical applications.
- Technical support and after-sales service