ilmanlämmönvaihdintyyppejä

Ilmanlämmönvaihdin is a Finnish term that translates to "air heat exchanger." It is a device designed to transfer heat between two air streams. Typically, one airstream is warmer and the other is cooler, and the exchanger facilitates the transfer of thermal energy from the warmer to the cooler stream without the two streams mixing.

These devices are commonly found in ventilation systems, particularly in buildings, to preheat or precool incoming fresh air using the outgoing exhaust air. This process significantly reduces the energy required for heating or cooling, as the incoming air is brought closer to the desired indoor temperature before it reaches the main heating or cooling coils.

Ilmanlämmönvaihdin can take various forms, including plate heat exchangers and rotary heat exchangers. Plate heat exchangers consist of a series of thin metal plates that create channels for the two air streams to flow through, with heat transferring across the plate surfaces. Rotary heat exchangers use a rotating wheel coated with a porous material that absorbs heat from the exhaust air and then releases it to the incoming fresh air as the wheel rotates.

The efficiency of an ilmanlämmönvaihdin is measured by its thermal effectiveness, which indicates how much of the potential temperature difference between the two air streams is actually transferred. These devices play a crucial role in improving indoor air quality and energy efficiency in modern buildings.