Ilmalämmönvaihtimia

Ilmalämmönvaihdin is a Finnish term that translates to air heat exchanger. It is a device designed to transfer heat between two air streams, typically for the purpose of ventilation and energy recovery. The primary function of an air heat exchanger is to preheat or precool incoming fresh air using the energy from outgoing exhaust air. This process significantly reduces the energy required for heating or cooling a building, leading to substantial cost savings and a lower environmental impact.

There are several types of air heat exchangers, with the most common being the plate heat exchanger and the rotary heat exchanger. Plate heat exchangers consist of a series of thin metal plates separated by small channels. Air flows through these channels, with one stream flowing on one side of a plate and the other stream on the opposite side. Heat is conducted through the plates from the warmer air to the colder air. Rotary heat exchangers, also known as heat wheels, use a rotating mass, often made of metal or ceramic. As the wheel rotates, it absorbs heat from the exhaust air and then transfers it to the incoming fresh air.

The effectiveness of an air heat exchanger is measured by its thermal efficiency, which indicates the percentage of heat that is transferred. Modern air heat exchangers can achieve efficiencies of 70% or higher. They are commonly integrated into mechanical ventilation systems, such as those found in residential homes, commercial buildings, and industrial facilities. Proper installation and maintenance are crucial for optimal performance and longevity of the device.