HEAT EXCHANGER, VENTILATION DEVICE AND METHOD FOR RECOVERING HEAT FROM FLUID FLOW AND RELEASING HEAT TO FLUID FLOW

摘要

The invention relates to a heat exchanger, particularly the invention relates to a heat exchanger which exploits a phase changing material in heat recovery and release. Furthermore, the invention relates to a ventilation device in which heat exchangers according to the present invention is arranged as a pair, and a method for recovering heat from the fluid flow and releasing heat to the fluid flow. By means of the present invention, the energy recovery of the heat exchanger which exploits a phase change can be improved. The heat exchanger according to the present invention is placed in conjunction with the first and the second spaces so that the fluid flow between the first space and the second space can be directed through the heat exchanger. Furthermore, the heat exchanger comprises a heat transfer space, in which heat transfer space is arranged a phase changing material for providing heat exchange between the fluid flow and the heat exchanger. In conjunction with the heat transfer space, are provided means for adjusting the volume of the heat transfer space, with which adjustment of the volume the phase change of the phase changing material can be controlled.