METHOD AND ARRANGEMENT FOR CONTROLLING HEAT TRANSFER IN VENTILATION APPARATUS OR AIR CONDITIONING APPARATUS

摘要

A method and an arrangement for controlling heat transfer in a ventilation apparatus or an air conditioning apparatus, according to which heat contained in exhaust air (B) is recovered into supply air (A) by means of a heat transfer circuit based on fluid circulation, and additional heating or additional cooling energy (8, 9) is supplied to the heat transfer circuit when the heat transfer is insufficient for maintaining a desired temperature of the supply air. To optimize the heat recovery, the supply of additional heating or cooling energy is minimized by measuring the temperatures and fluid flows of the heat transfer fluid and of the additional energy.