Why fresh air matters in extraction systems!
For a process exhaust extraction system to operate effectively, a sufficient supply of fresh air must always be ensured. This prevents negative pressure from developing in the process area, which could impair the extraction and endanger the working environment.
The advantages of a well-planned supply air system are:
Optimal extraction performance: A consistent supply of fresh air keeps the airflow stable, ensures optimal extraction, and effectively removes pollutants.
Energy efficiency: By using preheated supply air, e.g. via heat recovery systems, less energy is required for space heating.
Comfort: A regulated supply air supply minimizes drafts by introducing fresh air evenly and at moderate flow rates into the room. This enhances employee well-being and contributes to a pleasant working climate.
Healthy working conditions: Regulated supply air ensures consistently high indoor air quality and benefits employees. The right balance between supply air and exhaust air is crucial for maximum efficiency and safety in the production environment.
Utilize thermal energy to heat incoming outdoor air and save heating costs
In industrial processes, the extraction of process exhaust air is essential to safely and efficiently remove harmful gases, dust, and fumes. However, one often overlooked aspect of these systems is the optimal supply air provision and the recovery of heat contained in the exhaust air. This is where significant efficiency gains can be achieved. By integrating intelligent supply air controls and modern heat recovery systems, not only can energy consumption be significantly reduced, but a more sustainable operation can also be ensured.
Keller Lufttechnik has many years of experience in designing and implementing supply air and heat recovery solutions for a wide range of industries. Learn more about the key technologies and their benefits.
Systems and Technologies
Learn more about the key technologies and their benefits.
Plate Heat Exchanger (PHE)
The plate heat exchanger is a simple yet effective solution for heat recovery. It consists of a series of thin plates through which the exhaust air flows. The heat is transferred to the colder supply air without the two airflows mixing.
Rotary Heat Exchanger (RHE)
The rotary heat exchanger, also known as a thermal wheel, is a rotating heat storage device that absorbs heat from the exhaust air and transfers it to the supply air. Thanks to its continuous rotation, a very high heat transfer efficiency can be achieved, significantly reducing the energy required for air treatment. In addition, its compact design allows space-saving integration into supply air systems.
Run-around Coil System (RAC)
The run-around coil system is a closed solution in which a heat transfer medium consisting of a water-glycol mixture absorbs heat from the exhaust air and transfers it to the supply air via a separate piping system. This system is particularly suitable for situations where exhaust air and supply air are spatially separated or where any mixing of the airflows must be completely avoided.
ProTERM Evo – Efficient. Safe. Flexible. Convenient.
- Cost-efficient thanks to high energy efficiency
- Safe technology for maximum operational reliability
- Decentralized & adjustable for versatile applications
- Easy installation & upgrade – Plug&Play
ProTERM Evo – Supply air and heat recovery combined into one
The ProTERM Evo is a compact supply air unit with integrated RAC heat recovery for process exhaust air applications. It is suitable for both indoor and outdoor installation and recovers 68% of the exhaust air heat.
A compact supply air system with integrated heat recovery for process exhaust air applications.
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Contact
Zoran Malesevic
Phone +49 7021 574 - 207
zoran.malesevic(at)keller-lufttechnik.de
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Supply air and heat recovery systems: Function and benefits
Industrial processes often generate exhaust air containing heat and pollutants. Effective supply air technology combined with modern heat recovery improves air quality and saves energy. But how does it work, and what are the benefits?
Supply Air Technology – Fresh Air for Healthy Working Conditions
Supply air technology delivers fresh, filtered air directly into work areas, ensuring a healthy indoor climate. At the same time, it prevents pollutants from the exhaust air from being released uncontrolled into the environment. Modern systems automatically and energy-efficiently regulate air volume, temperature, and humidity.
Heat Recovery – Using Energy Efficiently
Exhaust air often contains valuable thermal energy that can be recovered through heat recovery systems. This energy can be used to warm the supply air or support other thermal processes. As a result, energy costs and CO₂ emissions are reduced – a win for both the environment and the budget.
How Heat Recovery Works
Heat exchangers transfer the heat from the exhaust air to the fresh supply air without mixing the two airflows. Efficient technologies such as crossflow or rotary heat exchangers achieve particularly high recovery rates. The most common types of heat recovery for utilizing process air waste heat are:
- Plate Heat Exchangers – PHE
- Run-around Coil Systems – RAC
- Rotary Heat Exchangers – RHE
Benefits for Companies
- Cost savings: Lower heating and energy costs.
- Sustainability: Reduced energy consumption and CO₂ emissions.
- Improved working conditions: Clean air enhances well-being and productivity.
- Regulatory compliance: Fulfillment of environmental, energy, and safety requirements.
Practical Applications
Our supply air and heat recovery systems are used in many industries, such as metalworking, the pharmaceutical and chemical sectors, and recycling. They are particularly well-suited for areas with high heat or pollutant loads.
Would you like to learn more? Contact us – we will support you with planning and implementation!