ilmalämmönsiirtoyksikkö

An ilmalämmönsiirtoyksikkö, which translates to air heat exchanger unit, is a component used in HVAC systems to transfer heat between two air streams. This is typically achieved through a heat exchanger core. The primary function is to pre-condition incoming fresh air using the outgoing stale air, thereby recovering energy and reducing the heating or cooling load on the main HVAC system.

These units are commonly found in ventilation systems, particularly in buildings where energy efficiency is a priority, such as homes, offices, and commercial establishments. The air heat exchanger unit consists of a series of channels or plates through which the two air streams pass. Heat is transferred from the warmer air stream to the colder one across the separating material without the air streams mixing.

There are several types of air heat exchanger units, including cross-flow, counter-flow, and rotary heat exchangers. Cross-flow units have air streams moving perpendicular to each other, while counter-flow units have them moving in opposite directions. Rotary heat exchangers use a rotating wheel that absorbs heat from one air stream and releases it to the other. The selection of a specific type depends on factors such as efficiency requirements, space constraints, and cost. By recovering thermal energy, ilmalämmönsiirtoyksikkö contributes significantly to reducing energy consumption and improving indoor air quality by enabling higher ventilation rates with less energy penalty.