Energy Saving Investigation of Heat and Energy Recovery Ventilation Units

The object of this research study was investigating the energy saving by heat and energy recovery ventilation units in three in different climate EU countries. During the research the investigated heat recoveries that are suitable only for heat transfer were the fixed-plate heat exchanger, the run around coil and the heat-pipe technology. Energy exchangers allow both heat-and moisture transfer with higher moisture transfer effectiveness by a sorption rotor (desiccant wheel) and with lower humidity effectiveness without sorption coating. The effectiveness values of heat and energy exchangers were selected based on VDI 2071 standard. Using the ambient temperature and enthalpy duration curves, developing a novel simulation approach, detailed mathematical expressions are presented to determine the annual energy saved of the ventilation systems. The simulation was achieved for three different climates cities.