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Heat recovery

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Waste heat in the exhaust gas from various processes can be used to heat liquid for further use/processes. Waste heat recovery is a unique opportunity with both financial and environmental benefits.

The optimal design of Airec heat exchangers gives unique opportunities for waste heat recovery, and their modularity enables them to be adapted for a wide range of conditions. Airec heat exchangers can work in a wide temperature range (up to 750°C). They have a compact design, high efficiency, and a low pressure drop, making them suitable for a wide range of installations. Their high efficiency and condensing capacity, superior to other heat exchanger designs on the market, enable them to make greater use of the enthalpy and thereby contribute to a valuable efficiency increase. Airec heat exchangers in waste heat recovery applications have short payback times.

Low-pressure steam
Many industries release low-pressure steam (1 bar) from their production processes. Low-pressure steam has very high latent energy content. Heat recovery using traditional heat exchangers suffers from excessively high pressure drop or excessively low condensation efficiency. The Airec design enables the energy even in low-pressure steam to be used to heat water.

Gas boiler economizers
When fitted to a boiler, they save energy by using the exhaust gases from the boiler to preheat the cold water used for the boiler feed supply. The economizer is located between the boiler and the chimney, and can lower the exhaust gas temperature from approximately 200°C to typically about 65°C while preheating the process water from typically 30°C to 80°C. The Airec heat exchanger is specially designed for boiler economizer applications. With its high efficiency and very high condensing capacity, it can make greater use of the enthalpy, thereby helping to increase the total efficiency of the boiler to nearly 100%. The Airec heat exchanger’s modular design enables it to be adapted for a wide range of boiler capacities.

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